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tiny:master tiny:ai-branch-fixes-spring tiny:ai-branch-fixes-spring-kotlin tiny:ai-branch-fixes tiny:ai-branch
tiny:working_but_still_not_great tiny:still_missing_some_wildcard_transitions_but_working_great
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compare: tiny:ai-branch-fixes-spring-kotlin
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tiny:ai-branch-fixes-spring tiny:ai-branch-fixes-spring-kotlin tiny:ai-branch-fixes tiny:ai-branch tiny:master
tiny:working_but_still_not_great tiny:still_missing_some_wildcard_transitions_but_working_great

1 Commits
411b7a0e52 ... ai-branch-

Author SHA1 Message Date
Kamil Patryk Kozakowski
bb97285906 kotlin 2026-07-07 17:39:09 +02:00
27 changed files with 3078 additions and 3 deletions
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2
settings.gradle
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@@ -20,3 +20,5 @@ include ':state_machines:enterprise_order_system'
include ':state_machines:multi_module_sample:api-module' include ':state_machines:multi_module_sample:api-module'
include ':state_machines:multi_module_sample:core-module' include ':state_machines:multi_module_sample:core-module'
include ':state_machines:state_machine_enterprise' include ':state_machines:state_machine_enterprise'
include 'state_machine_exporter_kotlin'
include ':state_machines:kotlin_simple_state_machine'

3
state_machine_exporter/build.gradle
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@@ -32,6 +32,9 @@ dependencies {
// deps for parsing java AST // deps for parsing java AST
implementation 'org.eclipse.jdt:org.eclipse.jdt.core:3.36.0' implementation 'org.eclipse.jdt:org.eclipse.jdt.core:3.36.0'
// Kotlin plugin integration via ServiceLoader
runtimeOnly project(':state_machine_exporter_kotlin')
// Jackson for JSON support // Jackson for JSON support
implementation 'com.fasterxml.jackson.core:jackson-databind:2.17.1' implementation 'com.fasterxml.jackson.core:jackson-databind:2.17.1'
implementation 'com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.17.1' implementation 'com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.17.1'

4
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/service/CallGraphEngine.java
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@@ -8,4 +8,8 @@ import java.util.List;
public interface CallGraphEngine { public interface CallGraphEngine {
List<CallChain> findChains(List<EntryPoint> entryPoints, List<TriggerPoint> triggers); List<CallChain> findChains(List<EntryPoint> entryPoints, List<TriggerPoint> triggers);
default java.util.Map<String, java.util.List<click.kamil.springstatemachineexporter.analysis.model.CallEdge>> getCallGraph() {
return java.util.Collections.emptyMap();
}
} }

118
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/service/CompositeCallGraphEngine.java Normal file
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@@ -0,0 +1,118 @@
package click.kamil.springstatemachineexporter.analysis.service;
import click.kamil.springstatemachineexporter.analysis.model.CallChain;
import click.kamil.springstatemachineexporter.analysis.model.CallEdge;
import click.kamil.springstatemachineexporter.analysis.model.EntryPoint;
import click.kamil.springstatemachineexporter.analysis.model.TriggerPoint;
import java.util.*;
public class CompositeCallGraphEngine implements CallGraphEngine {
private final List<CallGraphEngine> engines;
private final Map<String, List<CallEdge>> mergedGraph = new HashMap<>();
public CompositeCallGraphEngine(List<CallGraphEngine> engines) {
this.engines = engines;
mergeGraphs();
}
private void mergeGraphs() {
for (CallGraphEngine engine : engines) {
Map<String, List<CallEdge>> graph = engine.getCallGraph();
if (graph != null) {
for (Map.Entry<String, List<CallEdge>> entry : graph.entrySet()) {
String caller = normalizeCompanionFqn(entry.getKey());
List<CallEdge> edges = mergedGraph.computeIfAbsent(caller, k -> new ArrayList<>());
for (CallEdge edge : entry.getValue()) {
String target = normalizeCompanionFqn(edge.getTargetMethod());
edges.add(new CallEdge(target, edge.getArguments(), edge.getReceiver()));
}
}
}
}
}
private String normalizeCompanionFqn(String fqn) {
if (fqn == null) return null;
return fqn.replace(".Companion.", ".");
}
@Override
public Map<String, List<CallEdge>> getCallGraph() {
return mergedGraph;
}
@Override
public List<CallChain> findChains(List<EntryPoint> entryPoints, List<TriggerPoint> triggers) {
List<CallChain> chains = new ArrayList<>();
for (EntryPoint ep : entryPoints) {
String startMethod = normalizeCompanionFqn(ep.getClassName() + "." + ep.getMethodName());
for (TriggerPoint tp : triggers) {
String targetMethod = normalizeCompanionFqn(tp.getClassName() + "." + tp.getMethodName());
List<List<String>> paths = findAllPaths(startMethod, targetMethod, new LinkedHashSet<>());
for (List<String> path : paths) {
chains.add(CallChain.builder()
.entryPoint(ep)
.methodChain(path)
.triggerPoint(tp)
.build());
}
}
}
return chains;
}
private List<List<String>> findAllPaths(String start, String target, Set<String> visited) {
List<List<String>> result = new ArrayList<>();
if (start.equals(target)) {
result.add(new ArrayList<>(List.of(start)));
return result;
}
if (!visited.add(start)) {
return result;
}
List<CallEdge> neighbors = mergedGraph.get(start);
if (neighbors != null) {
for (CallEdge edge : neighbors) {
String neighbor = edge.getTargetMethod();
if (neighbor.startsWith("java.") || neighbor.startsWith("javax.") ||
neighbor.startsWith("jakarta.") || neighbor.startsWith("org.springframework.")) {
continue;
}
if (neighbor.equals(target) || isHeuristicMatch(neighbor, target)) {
List<String> path = new ArrayList<>(List.of(start, target));
result.add(path);
} else {
List<List<String>> subPaths = findAllPaths(neighbor, target, visited);
for (List<String> subPath : subPaths) {
List<String> path = new ArrayList<>();
path.add(start);
path.addAll(subPath);
result.add(path);
}
}
}
}
visited.remove(start);
return result;
}
private boolean isHeuristicMatch(String neighbor, String target) {
if (neighbor == null || target == null) return false;
if (neighbor.equals(target)) return true;
if (neighbor.contains(".") && target.contains(".")) {
String methodNeighbor = neighbor.substring(neighbor.lastIndexOf('.') + 1);
String methodTarget = target.substring(target.lastIndexOf('.') + 1);
if (methodNeighbor.equals(methodTarget)) {
String classNeighbor = neighbor.substring(0, neighbor.lastIndexOf('.'));
String classTarget = target.substring(0, target.lastIndexOf('.'));
String simpleClassNeighbor = classNeighbor.contains(".") ? classNeighbor.substring(classNeighbor.lastIndexOf('.') + 1) : classNeighbor;
String simpleClassTarget = classTarget.contains(".") ? classTarget.substring(classTarget.lastIndexOf('.') + 1) : classTarget;
return simpleClassNeighbor.equalsIgnoreCase(simpleClassTarget);
}
}
return false;
}
}

53
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/service/CompositeIntelligenceProvider.java Normal file
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@@ -0,0 +1,53 @@
package click.kamil.springstatemachineexporter.analysis.service;
import click.kamil.springstatemachineexporter.analysis.model.CallChain;
import click.kamil.springstatemachineexporter.analysis.model.EntryPoint;
import click.kamil.springstatemachineexporter.analysis.model.TriggerPoint;
import java.util.*;
public class CompositeIntelligenceProvider implements CodebaseIntelligenceProvider {
private final List<CodebaseIntelligenceProvider> providers;
private final List<CallGraphEngine> engines;
public CompositeIntelligenceProvider(List<CodebaseIntelligenceProvider> providers, List<CallGraphEngine> engines) {
this.providers = providers;
this.engines = engines;
}
@Override
public List<TriggerPoint> findTriggerPoints() {
List<TriggerPoint> result = new ArrayList<>();
for (CodebaseIntelligenceProvider provider : providers) {
result.addAll(provider.findTriggerPoints());
}
return result;
}
@Override
public List<EntryPoint> findEntryPoints() {
List<EntryPoint> result = new ArrayList<>();
for (CodebaseIntelligenceProvider provider : providers) {
result.addAll(provider.findEntryPoints());
}
return result;
}
@Override
public List<CallChain> findCallChains(List<EntryPoint> entryPoints, List<TriggerPoint> triggers) {
CompositeCallGraphEngine compositeEngine = new CompositeCallGraphEngine(engines);
return compositeEngine.findChains(entryPoints, triggers);
}
@Override
public Map<String, Map<String, String>> resolveProperties() {
Map<String, Map<String, String>> result = new HashMap<>();
for (CodebaseIntelligenceProvider provider : providers) {
Map<String, Map<String, String>> props = provider.resolveProperties();
if (props != null) {
result.putAll(props);
}
}
return result;
}
}

5
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/service/JdtCallGraphEngine.java
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@@ -24,6 +24,11 @@ public class JdtCallGraphEngine extends AbstractCallGraphEngine {
this.injectionAnalyzer = injectionAnalyzer; this.injectionAnalyzer = injectionAnalyzer;
} }
@Override
public Map<String, List<CallEdge>> getCallGraph() {
return buildCallGraph();
}
@SuppressWarnings("unchecked") @SuppressWarnings("unchecked")
protected Map<String, List<CallEdge>> buildCallGraph() { protected Map<String, List<CallEdge>> buildCallGraph() {
Map<String, List<CallEdge>> cached = (Map<String, List<CallEdge>>) context.getCache().get("jdtCallGraph"); Map<String, List<CallEdge>> cached = (Map<String, List<CallEdge>>) context.getCache().get("jdtCallGraph");

12
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/ast/common/CodebaseContext.java
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@@ -22,9 +22,10 @@ import java.util.List;
import java.util.Map; import java.util.Map;
import java.util.Set; import java.util.Set;
import lombok.extern.slf4j.Slf4j; import lombok.extern.slf4j.Slf4j;
import click.kamil.springstatemachineexporter.spi.SourceContext;
@Slf4j @Slf4j
public class CodebaseContext { public class CodebaseContext implements SourceContext {
private final Map<String, CompilationUnit> classes = new HashMap<>(); private final Map<String, CompilationUnit> classes = new HashMap<>();
private final Map<String, Path> classPaths = new HashMap<>(); private final Map<String, Path> classPaths = new HashMap<>();
private final Map<String, String> simpleNameToFqn = new HashMap<>(); private final Map<String, String> simpleNameToFqn = new HashMap<>();
@@ -51,6 +52,11 @@ public class CodebaseContext {
this.projectRoot = root; this.projectRoot = root;
} }
@Override
public Path getProjectRoot() {
return projectRoot;
}
public String getRelativePath(Path fullPath) { public String getRelativePath(Path fullPath) {
if (projectRoot != null && fullPath.isAbsolute() && fullPath.startsWith(projectRoot)) { if (projectRoot != null && fullPath.isAbsolute() && fullPath.startsWith(projectRoot)) {
return projectRoot.relativize(fullPath).toString(); return projectRoot.relativize(fullPath).toString();
@@ -88,6 +94,10 @@ public class CodebaseContext {
this.classpath = classpath.toArray(new String[0]); this.classpath = classpath.toArray(new String[0]);
} }
public List<String> getClasspath() {
return java.util.Arrays.asList(classpath);
}
public void setSourcepath(List<String> sourcepath) { public void setSourcepath(List<String> sourcepath) {
this.sourcepath = sourcepath.toArray(new String[0]); this.sourcepath = sourcepath.toArray(new String[0]);
} }

147
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/plugin/java/JavaLanguageAnalyzerPlugin.java Normal file
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@@ -0,0 +1,147 @@
package click.kamil.springstatemachineexporter.plugin.java;
import click.kamil.springstatemachineexporter.analysis.model.AnalysisResult;
import click.kamil.springstatemachineexporter.analysis.service.CallGraphEngine;
import click.kamil.springstatemachineexporter.analysis.service.CodebaseIntelligenceProvider;
import click.kamil.springstatemachineexporter.analysis.service.JdtCallGraphEngine;
import click.kamil.springstatemachineexporter.analysis.service.JdtIntelligenceProvider;
import click.kamil.springstatemachineexporter.ast.app.AstTransitionParser;
import click.kamil.springstatemachineexporter.ast.app.StateMachineAggregator;
import click.kamil.springstatemachineexporter.ast.app.TransitionStateUtils;
import click.kamil.springstatemachineexporter.ast.common.CodebaseContext;
import click.kamil.springstatemachineexporter.model.Transition;
import click.kamil.springstatemachineexporter.spi.LanguageAnalyzerPlugin;
import click.kamil.springstatemachineexporter.spi.SourceContext;
import org.eclipse.jdt.core.dom.MethodDeclaration;
import org.eclipse.jdt.core.dom.TypeDeclaration;
import java.nio.file.Path;
import java.util.*;
public class JavaLanguageAnalyzerPlugin implements LanguageAnalyzerPlugin {
@Override
public boolean supports(Path projectRoot) {
return true;
}
@Override
public SourceContext parseProject(Path projectRoot, List<String> classpath, Set<Path> sourcePaths) {
CodebaseContext context = new CodebaseContext();
context.setProjectRoot(projectRoot);
if (classpath != null && !classpath.isEmpty()) {
context.setClasspath(classpath);
}
Path hintsFile = projectRoot.resolve("hints.json");
if (!java.nio.file.Files.exists(hintsFile)) {
hintsFile = projectRoot.resolve("src/main/resources/hints.json");
}
if (java.nio.file.Files.exists(hintsFile)) {
try {
context.loadLibraryHints(hintsFile);
} catch (java.io.IOException e) {
throw new RuntimeException(e);
}
}
List<String> sp = sourcePaths.stream()
.map(p -> p.resolve("src/main/java"))
.filter(p -> java.nio.file.Files.exists(p))
.map(Path::toString)
.toList();
if (sp.isEmpty()) {
sp = sourcePaths.stream().map(Path::toString).toList();
}
context.setSourcepath(sp);
context.setResolveBindings(true);
try {
context.scan(sourcePaths, Collections.emptySet());
} catch (java.io.IOException e) {
throw new RuntimeException(e);
}
return context;
}
@Override
public CallGraphEngine createCallGraphEngine(SourceContext context) {
if (context instanceof CodebaseContext jdtContext) {
return new JdtCallGraphEngine(jdtContext, null);
}
throw new IllegalArgumentException("Expected CodebaseContext");
}
@Override
public CodebaseIntelligenceProvider createIntelligenceProvider(SourceContext context) {
if (context instanceof CodebaseContext jdtContext) {
return new JdtIntelligenceProvider(jdtContext, jdtContext.getProjectRoot());
}
throw new IllegalArgumentException("Expected CodebaseContext");
}
@Override
public List<AnalysisResult> extractStateMachines(SourceContext context, boolean renderChoicesAsDiamonds) {
if (context instanceof CodebaseContext jdtContext) {
List<AnalysisResult> results = new ArrayList<>();
// 1. Find entry point classes (annotated or extending adapter)
List<TypeDeclaration> entryPoints = jdtContext.findEntryPointClasses(List.of("EnableStateMachineFactory", "EnableStateMachine"));
for (TypeDeclaration td : entryPoints) {
String className = jdtContext.getFqn(td);
StateMachineAggregator aggregator = new StateMachineAggregator(jdtContext);
List<Transition> transitions = aggregator.aggregateTransitions(td);
aggregator.aggregateStates(td);
Set<String> initialStatesAst = aggregator.getInitialStates();
Set<String> endStatesAst = aggregator.getEndStates();
Set<String> startStates = TransitionStateUtils.findStartStates(transitions, initialStatesAst);
Set<String> endStates = TransitionStateUtils.findEndStates(transitions, endStatesAst);
Set<click.kamil.springstatemachineexporter.model.State> allStates = TransitionStateUtils.findAllStates(transitions, initialStatesAst, endStatesAst);
if (allStates.isEmpty() && transitions.isEmpty()) {
continue;
}
results.add(AnalysisResult.builder()
.name(className)
.states(allStates)
.transitions(transitions)
.startStates(startStates)
.endStates(endStates)
.renderChoicesAsDiamonds(renderChoicesAsDiamonds)
.build());
}
// 2. Find methods returning StateMachine beans
List<MethodDeclaration> beanMethods = jdtContext.findBeanMethodsReturning(Set.of("StateMachine", "StateMachineFactory", "StateMachineModelFactory"));
for (MethodDeclaration m : beanMethods) {
TypeDeclaration parentClass = (TypeDeclaration) m.getParent();
String parentFqn = jdtContext.getFqn(parentClass);
String methodName = m.getName().getIdentifier();
String uniqueName = parentFqn + "#" + methodName;
List<Transition> transitions = AstTransitionParser.parseTransitions(m, jdtContext);
Set<String> startStates = TransitionStateUtils.findStartStates(transitions, null);
Set<String> endStates = TransitionStateUtils.findEndStates(transitions, null);
Set<click.kamil.springstatemachineexporter.model.State> allStates = TransitionStateUtils.findAllStates(transitions, null, null);
if (allStates.isEmpty() && transitions.isEmpty()) {
continue;
}
results.add(AnalysisResult.builder()
.name(uniqueName)
.states(allStates)
.transitions(transitions)
.startStates(startStates)
.endStates(endStates)
.renderChoicesAsDiamonds(renderChoicesAsDiamonds)
.build());
}
return results;
}
return Collections.emptyList();
}
}

58
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/service/ExportService.java
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@@ -20,6 +20,11 @@ import click.kamil.springstatemachineexporter.exporter.StateMachineExporter;
import lombok.extern.slf4j.Slf4j; import lombok.extern.slf4j.Slf4j;
import org.eclipse.jdt.core.dom.MethodDeclaration; import org.eclipse.jdt.core.dom.MethodDeclaration;
import org.eclipse.jdt.core.dom.TypeDeclaration; import org.eclipse.jdt.core.dom.TypeDeclaration;
import click.kamil.springstatemachineexporter.spi.LanguageAnalyzerPlugin;
import click.kamil.springstatemachineexporter.spi.SourceContext;
import click.kamil.springstatemachineexporter.analysis.service.CompositeIntelligenceProvider;
import click.kamil.springstatemachineexporter.analysis.service.CallGraphEngine;
import click.kamil.springstatemachineexporter.analysis.service.JdtCallGraphEngine;
import java.io.IOException; import java.io.IOException;
import java.io.PrintWriter; import java.io.PrintWriter;
@@ -137,8 +142,57 @@ public class ExportService {
context.scan(allPaths, Collections.emptySet()); context.scan(allPaths, Collections.emptySet());
CodebaseIntelligenceProvider intelligence = new JdtIntelligenceProvider(context, inputDir); // Load SPI plugins dynamically
exportAll(context, intelligence, outputDir, selectedFormats, renderChoicesAsDiamonds, flows, machineFilter, activeProfiles != null ? activeProfiles : Collections.emptyList(), eventFormat, stateFormat); ServiceLoader<LanguageAnalyzerPlugin> loader = ServiceLoader.load(LanguageAnalyzerPlugin.class);
List<LanguageAnalyzerPlugin> plugins = new ArrayList<>();
for (LanguageAnalyzerPlugin plugin : loader) {
if (plugin.supports(inputDir)) {
plugins.add(plugin);
}
}
if (plugins.isEmpty()) {
plugins.add(new click.kamil.springstatemachineexporter.plugin.java.JavaLanguageAnalyzerPlugin());
}
List<SourceContext> sourceContexts = new ArrayList<>();
List<CodebaseIntelligenceProvider> providers = new ArrayList<>();
List<CallGraphEngine> engines = new ArrayList<>();
List<AnalysisResult> extractedResults = new ArrayList<>();
for (LanguageAnalyzerPlugin plugin : plugins) {
SourceContext sc = plugin.parseProject(projectRoot, context.getClasspath(), allPaths);
sourceContexts.add(sc);
providers.add(plugin.createIntelligenceProvider(sc));
engines.add(plugin.createCallGraphEngine(sc));
extractedResults.addAll(plugin.extractStateMachines(sc, renderChoicesAsDiamonds));
}
CodebaseContext codebaseContext = context;
CodebaseIntelligenceProvider unifiedIntelligence;
if (plugins.size() == 1) {
unifiedIntelligence = providers.get(0);
if (sourceContexts.get(0) instanceof CodebaseContext jdtCtx) {
codebaseContext = jdtCtx;
}
} else {
unifiedIntelligence = new CompositeIntelligenceProvider(providers, engines);
}
// Process all extracted state machines
for (AnalysisResult result : extractedResults) {
String name = result.getName();
if (machineFilter != null && !name.contains(machineFilter)) {
continue;
}
if (result.getFlows() == null || result.getFlows().isEmpty()) {
result.setFlows(flows);
}
enrichmentService.enrich(result, codebaseContext, unifiedIntelligence);
resolveProperties(result, activeProfiles);
generateOutputs(outputDir, result, selectedFormats, eventFormat, stateFormat);
}
} }
public void runJsonExporter(Path jsonFile, Path outputDir, List<String> selectedFormats) throws IOException { public void runJsonExporter(Path jsonFile, Path outputDir, List<String> selectedFormats) throws IOException {

43
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/spi/LanguageAnalyzerPlugin.java Normal file
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@@ -0,0 +1,43 @@
package click.kamil.springstatemachineexporter.spi;
import click.kamil.springstatemachineexporter.analysis.service.CallGraphEngine;
import click.kamil.springstatemachineexporter.analysis.service.CodebaseIntelligenceProvider;
import java.nio.file.Path;
import java.util.List;
import java.util.Set;
/**
* Service Provider Interface (SPI) for introducing support for different languages (Java, Kotlin, etc.).
*/
public interface LanguageAnalyzerPlugin {
/**
* Determines if this plugin is capable of handling the provided project root.
* Often checks for file extensions (.kt, .java) within the root.
*/
boolean supports(Path projectRoot);
/**
* Parses the codebase and sets up a SourceContext loaded with the language's AST structures.
*/
SourceContext parseProject(Path projectRoot, List<String> classpath, Set<Path> sourcePaths);
/**
* Creates a CallGraphEngine specialized for this language's syntax and paradigms.
*/
CallGraphEngine createCallGraphEngine(SourceContext context);
/**
* Creates a CodebaseIntelligenceProvider specialized for this language to discover
* Spring State Machine configurations, entry points, and transitions.
*/
CodebaseIntelligenceProvider createIntelligenceProvider(SourceContext context);
/**
* Finds and extracts all Spring State Machine models (configurations and beans) from the project.
*/
default List<click.kamil.springstatemachineexporter.analysis.model.AnalysisResult> extractStateMachines(SourceContext context, boolean renderChoicesAsDiamonds) {
return java.util.Collections.emptyList();
}
}

43
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/spi/SourceContext.java Normal file
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@@ -0,0 +1,43 @@
package click.kamil.springstatemachineexporter.spi;
import click.kamil.springstatemachineexporter.analysis.model.LibraryHint;
import java.nio.file.Path;
import java.util.List;
import java.util.Map;
/**
* An abstraction over a parsed source codebase (Java, Kotlin, etc.).
* Provides access to common metadata required by analysis engines.
*/
public interface SourceContext {
/**
* Gets the root directory of the scanned project.
*/
Path getProjectRoot();
/**
* Relativizes an absolute path against the project root.
*/
String getRelativePath(Path fullPath);
/**
* Returns a relative file path for a given fully qualified class/type name.
*/
String getRelativePath(String fqn);
/**
* Retrieves any loaded library hints (e.g. from hints.json).
*/
List<LibraryHint> getLibraryHints();
/**
* Retrieves application properties (e.g. from application.yml).
*/
Map<String, Map<String, String>> getProperties();
/**
* Gets an unstructured cache map that plugins can use to share data across processing phases.
*/
Map<String, Object> getCache();
}

36
state_machine_exporter_kotlin/build.gradle Normal file
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@@ -0,0 +1,36 @@
plugins {
id 'java'
}
group = 'click.kamil.springstatemachineexporter'
version = '1.0.0'
java {
toolchain {
languageVersion = JavaLanguageVersion.of(21)
}
}
repositories {
mavenCentral()
}
dependencies {
implementation project(':state_machine_exporter')
// Kotlin Compiler Embeddable for PSI/AST parsing
implementation 'org.jetbrains.kotlin:kotlin-compiler-embeddable:1.9.23'
implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.9.23'
compileOnly 'org.projectlombok:lombok:1.18.46'
annotationProcessor 'org.projectlombok:lombok:1.18.46'
testImplementation 'org.junit.jupiter:junit-jupiter-api:6.1.0'
testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:6.1.0'
testRuntimeOnly 'org.junit.platform:junit-platform-launcher:6.1.0'
testImplementation 'org.assertj:assertj-core:3.27.7'
}
test {
useJUnitPlatform()
}

170
state_machine_exporter_kotlin/src/main/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinCallGraphEngine.java Normal file
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@@ -0,0 +1,170 @@
package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.CallChain;
import click.kamil.springstatemachineexporter.analysis.model.CallEdge;
import click.kamil.springstatemachineexporter.analysis.model.EntryPoint;
import click.kamil.springstatemachineexporter.analysis.model.TriggerPoint;
import click.kamil.springstatemachineexporter.analysis.service.CallGraphEngine;
import org.jetbrains.kotlin.psi.*;
import org.jetbrains.kotlin.resolve.calls.util.CallUtilKt;
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
import org.jetbrains.kotlin.descriptors.CallableDescriptor;
import java.util.*;
public class KotlinCallGraphEngine implements CallGraphEngine {
private final KotlinSourceContext context;
private final Map<String, List<CallEdge>> graph = new HashMap<>();
public KotlinCallGraphEngine(KotlinSourceContext context) {
this.context = context;
buildGraph();
}
private void buildGraph() {
if (context.getBindingContext() == null) {
return;
}
for (KtFile ktFile : context.getKtFiles()) {
ktFile.accept(new KtTreeVisitorVoid() {
private String currentClassFqn = null;
private String currentFunctionFqn = null;
@Override
public void visitClassOrObject(KtClassOrObject ktClass) {
String oldClassFqn = currentClassFqn;
currentClassFqn = KotlinResolutionUtils.getClassFqn(ktClass, context.getBindingContext());
super.visitClassOrObject(ktClass);
currentClassFqn = oldClassFqn;
}
@Override
public void visitNamedFunction(KtNamedFunction function) {
String oldFunctionFqn = currentFunctionFqn;
currentFunctionFqn = KotlinResolutionUtils.getFunctionFqn(function, context.getBindingContext());
super.visitNamedFunction(function);
currentFunctionFqn = oldFunctionFqn;
}
@Override
public void visitCallExpression(KtCallExpression expression) {
if (currentFunctionFqn != null) {
ResolvedCall<? extends CallableDescriptor> resolvedCall =
CallUtilKt.getResolvedCall(expression, context.getBindingContext());
if (resolvedCall != null) {
CallableDescriptor descriptor = resolvedCall.getResultingDescriptor();
if (descriptor != null) {
String targetFqn = KotlinResolutionUtils.getCallableFqn(descriptor);
if (targetFqn != null) {
List<String> args = new ArrayList<>();
for (ValueArgument valArg : expression.getValueArguments()) {
KtExpression argExpr = valArg.getArgumentExpression();
if (argExpr != null) {
args.add(KotlinResolutionUtils.resolveArgument(argExpr, context.getBindingContext()));
}
}
CallEdge edge = new CallEdge(targetFqn, args, "unknown");
graph.computeIfAbsent(currentFunctionFqn, k -> new ArrayList<>()).add(edge);
// Polymorphic/Inheritance mapping: if target class has subclasses, register implementor edges
if (targetFqn.contains(".")) {
String className = targetFqn.substring(0, targetFqn.lastIndexOf('.'));
String methodName = targetFqn.substring(targetFqn.lastIndexOf('.') + 1);
List<String> implementations = context.getImplementations().get(className);
if (implementations != null) {
for (String impl : implementations) {
CallEdge implEdge = new CallEdge(impl + "." + methodName, args, "unknown");
graph.computeIfAbsent(currentFunctionFqn, k -> new ArrayList<>()).add(implEdge);
}
}
}
}
}
}
}
super.visitCallExpression(expression);
}
});
}
}
@Override
public Map<String, List<CallEdge>> getCallGraph() {
return graph;
}
@Override
public List<CallChain> findChains(List<EntryPoint> entryPoints, List<TriggerPoint> triggers) {
List<CallChain> chains = new ArrayList<>();
for (EntryPoint ep : entryPoints) {
String startMethod = ep.getClassName() + "." + ep.getMethodName();
for (TriggerPoint tp : triggers) {
String targetMethod = tp.getClassName() + "." + tp.getMethodName();
List<List<String>> paths = findAllPaths(startMethod, targetMethod, new LinkedHashSet<>());
for (List<String> path : paths) {
chains.add(CallChain.builder()
.entryPoint(ep)
.methodChain(path)
.triggerPoint(tp)
.build());
}
}
}
return chains;
}
private List<List<String>> findAllPaths(String start, String target, Set<String> visited) {
List<List<String>> result = new ArrayList<>();
if (start.equals(target)) {
result.add(new ArrayList<>(List.of(start)));
return result;
}
if (!visited.add(start)) {
return result;
}
List<CallEdge> neighbors = graph.get(start);
if (neighbors != null) {
for (CallEdge edge : neighbors) {
String neighbor = edge.getTargetMethod();
if (neighbor.startsWith("java.") || neighbor.startsWith("javax.") ||
neighbor.startsWith("jakarta.") || neighbor.startsWith("org.springframework.")) {
continue;
}
if (neighbor.equals(target) || isHeuristicMatch(neighbor, target)) {
List<String> path = new ArrayList<>(List.of(start, target));
result.add(path);
} else {
List<List<String>> subPaths = findAllPaths(neighbor, target, visited);
for (List<String> subPath : subPaths) {
List<String> path = new ArrayList<>();
path.add(start);
path.addAll(subPath);
result.add(path);
}
}
}
}
visited.remove(start);
return result;
}
private boolean isHeuristicMatch(String neighbor, String target) {
if (neighbor == null || target == null) return false;
if (neighbor.equals(target)) return true;
if (neighbor.contains(".") && target.contains(".")) {
String methodNeighbor = neighbor.substring(neighbor.lastIndexOf('.') + 1);
String methodTarget = target.substring(target.lastIndexOf('.') + 1);
if (methodNeighbor.equals(methodTarget)) {
String classNeighbor = neighbor.substring(0, neighbor.lastIndexOf('.'));
String classTarget = target.substring(0, target.lastIndexOf('.'));
String simpleClassNeighbor = classNeighbor.contains(".") ? classNeighbor.substring(classNeighbor.lastIndexOf('.') + 1) : classNeighbor;
String simpleClassTarget = classTarget.contains(".") ? classTarget.substring(classTarget.lastIndexOf('.') + 1) : classTarget;
return simpleClassNeighbor.equalsIgnoreCase(simpleClassTarget);
}
}
return false;
}
}

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state_machine_exporter_kotlin/src/main/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinIntelligenceProvider.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.CallChain;
import click.kamil.springstatemachineexporter.analysis.model.EntryPoint;
import click.kamil.springstatemachineexporter.analysis.model.TriggerPoint;
import click.kamil.springstatemachineexporter.analysis.service.CodebaseIntelligenceProvider;
import org.jetbrains.kotlin.psi.*;
import org.jetbrains.kotlin.resolve.BindingContext;
import org.jetbrains.kotlin.resolve.calls.util.CallUtilKt;
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
import org.jetbrains.kotlin.com.intellij.psi.PsiElement;
import org.jetbrains.kotlin.com.intellij.psi.PsiFile;
import java.util.*;
public class KotlinIntelligenceProvider implements CodebaseIntelligenceProvider {
private final KotlinSourceContext context;
public KotlinIntelligenceProvider(KotlinSourceContext context) {
this.context = context;
}
@Override
public List<TriggerPoint> findTriggerPoints() {
List<TriggerPoint> triggers = new ArrayList<>();
BindingContext bindingContext = context.getBindingContext();
if (bindingContext == null) {
return triggers;
}
for (KtFile ktFile : context.getKtFiles()) {
ktFile.accept(new KtTreeVisitorVoid() {
private String currentClassFqn = null;
private String currentFunctionFqn = null;
@Override
public void visitClassOrObject(KtClassOrObject ktClass) {
String oldClassFqn = currentClassFqn;
currentClassFqn = KotlinResolutionUtils.getClassFqn(ktClass, bindingContext);
super.visitClassOrObject(ktClass);
currentClassFqn = oldClassFqn;
}
@Override
public void visitNamedFunction(KtNamedFunction function) {
String oldFunctionFqn = currentFunctionFqn;
currentFunctionFqn = KotlinResolutionUtils.getFunctionFqn(function, bindingContext);
super.visitNamedFunction(function);
currentFunctionFqn = oldFunctionFqn;
}
@Override
public void visitCallExpression(KtCallExpression expression) {
KtExpression callee = expression.getCalleeExpression();
if (callee instanceof KtNameReferenceExpression) {
String name = ((KtNameReferenceExpression) callee).getReferencedName();
if ("sendEvent".equals(name) || "sendEventReactively".equals(name) ||
"sendEvents".equals(name) || "sendEventCollect".equals(name) ||
"sendEventMono".equals(name)) {
String eventName = "UNKNOWN_EVENT";
if (!expression.getValueArguments().isEmpty()) {
KtExpression arg = expression.getValueArguments().get(0).getArgumentExpression();
if (arg != null) {
eventName = KotlinResolutionUtils.resolveArgument(arg, bindingContext);
}
}
KtExpression receiver = null;
if (expression.getParent() instanceof KtDotQualifiedExpression dotExpr) {
if (dotExpr.getSelectorExpression() == expression) {
receiver = dotExpr.getReceiverExpression();
}
}
String stateType = null;
String eventType = null;
if (receiver != null) {
org.jetbrains.kotlin.types.KotlinType receiverType = bindingContext.getType(receiver);
if (receiverType != null && receiverType.getArguments().size() >= 2) {
stateType = receiverType.getArguments().get(0).getType().toString();
eventType = receiverType.getArguments().get(1).getType().toString();
}
}
if (stateType == null || eventType == null) {
ResolvedCall<? extends org.jetbrains.kotlin.descriptors.CallableDescriptor> resolvedCall =
CallUtilKt.getResolvedCall(expression, bindingContext);
if (resolvedCall != null) {
org.jetbrains.kotlin.resolve.scopes.receivers.ReceiverValue dispatchReceiver = resolvedCall.getDispatchReceiver();
if (dispatchReceiver != null) {
org.jetbrains.kotlin.types.KotlinType receiverType = dispatchReceiver.getType();
if (receiverType != null && receiverType.getArguments().size() >= 2) {
stateType = receiverType.getArguments().get(0).getType().toString();
eventType = receiverType.getArguments().get(1).getType().toString();
}
}
}
}
boolean external = false;
if (receiver instanceof KtNameReferenceExpression refExpr) {
org.jetbrains.kotlin.descriptors.DeclarationDescriptor descriptor =
bindingContext.get(BindingContext.REFERENCE_TARGET, refExpr);
if (descriptor instanceof org.jetbrains.kotlin.descriptors.ValueParameterDescriptor) {
external = true;
}
}
triggers.add(TriggerPoint.builder()
.event(eventName)
.sourceState(extractSourceState(expression))
.className(currentClassFqn)
.methodName(currentFunctionFqn != null && currentFunctionFqn.contains(".")
? currentFunctionFqn.substring(currentFunctionFqn.lastIndexOf('.') + 1)
: currentFunctionFqn)
.sourceFile(getRelativePathForElement(expression, context))
.lineNumber(getLineNumber(expression))
.stateTypeFqn(stateType)
.eventTypeFqn(eventType)
.external(external)
.constraint(findConditionConstraint(expression))
.build());
}
}
super.visitCallExpression(expression);
}
});
}
return triggers;
}
@Override
public List<EntryPoint> findEntryPoints() {
List<EntryPoint> entryPoints = new ArrayList<>();
BindingContext bindingContext = context.getBindingContext();
if (bindingContext == null) {
return entryPoints;
}
for (KtFile ktFile : context.getKtFiles()) {
ktFile.accept(new KtTreeVisitorVoid() {
private String currentClassFqn = null;
private String controllerBasePath = "";
@Override
public void visitClassOrObject(KtClassOrObject ktClass) {
String oldClassFqn = currentClassFqn;
String oldBasePath = controllerBasePath;
currentClassFqn = KotlinResolutionUtils.getClassFqn(ktClass, bindingContext);
controllerBasePath = getControllerPath(ktClass, bindingContext);
super.visitClassOrObject(ktClass);
currentClassFqn = oldClassFqn;
controllerBasePath = oldBasePath;
}
@Override
public void visitNamedFunction(KtNamedFunction function) {
super.visitNamedFunction(function);
if (currentClassFqn == null || function.getName() == null) {
return;
}
RestMapping rest = getRestMapping(function, controllerBasePath, bindingContext);
if (rest != null) {
entryPoints.add(EntryPoint.builder()
.type(EntryPoint.Type.REST)
.name(rest.verb + " " + rest.path)
.className(currentClassFqn)
.methodName(function.getName())
.sourceFile(getRelativePathForElement(function, context))
.metadata(Map.of("path", rest.path, "verb", rest.verb))
.parameters(extractParameters(function, bindingContext))
.build());
}
MessageMapping msg = getMessageMapping(function, bindingContext);
if (msg != null) {
entryPoints.add(EntryPoint.builder()
.type(msg.type)
.name(msg.protocol + ": " + msg.destination)
.className(currentClassFqn)
.methodName(function.getName())
.sourceFile(getRelativePathForElement(function, context))
.metadata(Map.of("destination", msg.destination, "protocol", msg.protocol))
.parameters(extractParameters(function, bindingContext))
.build());
}
}
});
}
return entryPoints;
}
@Override
public List<CallChain> findCallChains(List<EntryPoint> entryPoints, List<TriggerPoint> triggers) {
KotlinCallGraphEngine callGraphEngine = new KotlinCallGraphEngine(context);
return callGraphEngine.findChains(entryPoints, triggers);
}
@Override
public Map<String, Map<String, String>> resolveProperties() {
return Collections.emptyMap();
}
private static String getAnnotationValue(KtAnnotationEntry annotation, String name, BindingContext bindingContext) {
for (ValueArgument arg : annotation.getValueArguments()) {
if (arg instanceof KtValueArgument valueArg) {
if (valueArg.getArgumentName() != null && valueArg.getArgumentName().getAsName() != null) {
String argName = valueArg.getArgumentName().getAsName().asString();
if (name.equals(argName)) {
return resolveAnnotationValueExpr(valueArg.getArgumentExpression(), bindingContext);
}
} else if ("value".equals(name)) {
return resolveAnnotationValueExpr(valueArg.getArgumentExpression(), bindingContext);
}
}
}
return null;
}
private static String resolveAnnotationValueExpr(KtExpression expr, BindingContext bindingContext) {
if (expr == null) return null;
if (expr instanceof KtCollectionLiteralExpression colExpr) {
if (!colExpr.getInnerExpressions().isEmpty()) {
return KotlinResolutionUtils.resolveArgument(colExpr.getInnerExpressions().get(0), bindingContext);
}
}
return KotlinResolutionUtils.resolveArgument(expr, bindingContext);
}
private static String getControllerPath(KtClassOrObject controller, BindingContext bindingContext) {
for (KtAnnotationEntry ann : controller.getAnnotationEntries()) {
String name = ann.getShortName() != null ? ann.getShortName().asString() : "";
if (name.equals("RequestMapping") || name.equals("Path")) {
String path = getAnnotationValue(ann, "value", bindingContext);
if (path == null) path = getAnnotationValue(ann, "path", bindingContext);
if (path != null) return path;
}
}
return "";
}
private static class RestMapping {
String verb;
String path;
RestMapping(String verb, String path) {
this.verb = verb;
this.path = path;
}
}
private static RestMapping getRestMapping(KtNamedFunction function, String basePath, BindingContext bindingContext) {
for (KtAnnotationEntry ann : function.getAnnotationEntries()) {
String name = ann.getShortName() != null ? ann.getShortName().asString() : "";
String verb = null;
if (name.equals("GetMapping") || name.equals("GET")) verb = "GET";
else if (name.equals("PostMapping") || name.equals("POST")) verb = "POST";
else if (name.equals("PutMapping") || name.equals("PUT")) verb = "PUT";
else if (name.equals("DeleteMapping") || name.equals("DELETE")) verb = "DELETE";
else if (name.equals("PatchMapping") || name.equals("PATCH")) verb = "PATCH";
else if (name.equals("RequestMapping")) {
verb = getAnnotationValue(ann, "method", bindingContext);
if (verb == null) verb = "GET";
}
if (verb != null) {
String subPath = getAnnotationValue(ann, "value", bindingContext);
if (subPath == null) subPath = getAnnotationValue(ann, "path", bindingContext);
if (subPath == null) subPath = "";
String path = combinePaths(basePath, subPath);
return new RestMapping(verb, path);
}
}
return null;
}
private static String combinePaths(String base, String sub) {
if (base == null) base = "";
if (sub == null) sub = "";
if (!base.startsWith("/")) base = "/" + base;
if (base.endsWith("/")) base = base.substring(0, base.length() - 1);
if (!sub.startsWith("/") && !sub.isEmpty()) sub = "/" + sub;
return base + sub;
}
private static class MessageMapping {
EntryPoint.Type type;
String destination;
String protocol;
MessageMapping(EntryPoint.Type type, String destination, String protocol) {
this.type = type;
this.destination = destination;
this.protocol = protocol;
}
}
private static MessageMapping getMessageMapping(KtNamedFunction function, BindingContext bindingContext) {
for (KtAnnotationEntry ann : function.getAnnotationEntries()) {
String name = ann.getShortName() != null ? ann.getShortName().asString() : "";
if (name.equals("KafkaListener")) {
String topics = getAnnotationValue(ann, "topics", bindingContext);
if (topics == null) topics = getAnnotationValue(ann, "value", bindingContext);
if (topics == null) topics = "unknown";
return new MessageMapping(EntryPoint.Type.KAFKA, topics, "KAFKA");
} else if (name.equals("RabbitListener")) {
String queues = getAnnotationValue(ann, "queues", bindingContext);
if (queues == null) queues = getAnnotationValue(ann, "value", bindingContext);
if (queues == null) queues = "unknown";
return new MessageMapping(EntryPoint.Type.RABBIT, queues, "RABBIT");
} else if (name.equals("JmsListener")) {
String dest = getAnnotationValue(ann, "destination", bindingContext);
if (dest == null) dest = getAnnotationValue(ann, "value", bindingContext);
if (dest == null) dest = "unknown";
return new MessageMapping(EntryPoint.Type.JMS, dest, "JMS");
} else if (name.equals("SqsListener")) {
String dest = getAnnotationValue(ann, "value", bindingContext);
if (dest == null) dest = getAnnotationValue(ann, "queueNames", bindingContext);
if (dest == null) dest = "unknown";
return new MessageMapping(EntryPoint.Type.SQS, dest, "SQS");
} else if (name.equals("SnsListener")) {
String dest = getAnnotationValue(ann, "value", bindingContext);
if (dest == null) dest = getAnnotationValue(ann, "topicNames", bindingContext);
if (dest == null) dest = "unknown";
return new MessageMapping(EntryPoint.Type.SNS, dest, "SNS");
}
}
return null;
}
private static List<EntryPoint.Parameter> extractParameters(KtNamedFunction function, BindingContext bindingContext) {
List<EntryPoint.Parameter> params = new ArrayList<>();
for (KtParameter param : function.getValueParameters()) {
String name = param.getName();
String typeStr = "unknown";
org.jetbrains.kotlin.types.KotlinType type = bindingContext.get(BindingContext.TYPE, param.getTypeReference());
if (type != null) {
typeStr = type.toString();
} else if (param.getTypeReference() != null) {
typeStr = param.getTypeReference().getText();
}
List<String> annotations = new ArrayList<>();
for (KtAnnotationEntry ann : param.getAnnotationEntries()) {
if (ann.getShortName() != null) {
annotations.add(ann.getShortName().asString());
}
}
params.add(EntryPoint.Parameter.builder()
.name(name)
.type(typeStr)
.annotations(annotations)
.build());
}
return params;
}
private static String getRelativePathForElement(PsiElement element, KotlinSourceContext context) {
if (element == null) return null;
PsiFile file = element.getContainingFile();
if (file instanceof KtFile ktFile) {
if (ktFile.getVirtualFile() != null) {
String pathStr = ktFile.getVirtualFile().getPath();
if (pathStr != null) {
return context.getRelativePath(java.nio.file.Path.of(pathStr));
}
}
return ktFile.getName();
}
return null;
}
private static int getLineNumber(PsiElement element) {
if (element == null) return 0;
String text = element.getContainingFile().getText();
int offset = element.getTextRange().getStartOffset();
int line = 1;
for (int i = 0; i < offset && i < text.length(); i++) {
if (text.charAt(i) == '\n') {
line++;
}
}
return line;
}
private static String extractSourceState(PsiElement element) {
PsiElement current = element;
while (current != null && !(current instanceof KtNamedFunction)) {
PsiElement parent = current.getParent();
if (parent instanceof KtIfExpression ifExpr) {
if (ifExpr.getCondition() != current) {
String state = extractStateFromExpression(ifExpr.getCondition());
if (state != null) return state;
}
}
if (parent instanceof KtWhenEntry whenEntry) {
if (whenEntry.getConditions().length > 0) {
KtWhenCondition cond = whenEntry.getConditions()[0];
if (cond instanceof KtWhenConditionWithExpression condExpr) {
String state = getSimpleNameString(condExpr.getExpression());
if (state != null) return state;
}
}
}
current = parent;
}
return null;
}
private static String extractStateFromExpression(KtExpression expr) {
if (expr instanceof KtBinaryExpression binaryExpr) {
String op = binaryExpr.getOperationReference().getReferencedName();
if ("==".equals(op) || "!=".equals(op)) {
KtExpression left = binaryExpr.getLeft();
KtExpression right = binaryExpr.getRight();
if (left != null && right != null) {
if (left instanceof org.jetbrains.kotlin.psi.KtConstantExpression ||
left instanceof KtStringTemplateExpression ||
left instanceof KtNameReferenceExpression ||
left instanceof KtDotQualifiedExpression) {
return getSimpleNameString(left);
}
if (right instanceof org.jetbrains.kotlin.psi.KtConstantExpression ||
right instanceof KtStringTemplateExpression ||
right instanceof KtNameReferenceExpression ||
right instanceof KtDotQualifiedExpression) {
return getSimpleNameString(right);
}
}
}
}
return null;
}
private static String getSimpleNameString(KtExpression expr) {
if (expr instanceof KtNameReferenceExpression refExpr) {
return refExpr.getReferencedName();
}
if (expr instanceof KtDotQualifiedExpression dotExpr) {
KtExpression selector = dotExpr.getSelectorExpression();
if (selector instanceof KtNameReferenceExpression selectorRef) {
return selectorRef.getReferencedName();
}
return dotExpr.getText();
}
if (expr instanceof KtStringTemplateExpression stringTemplate) {
return stringTemplate.getText().replace("\"", "");
}
return expr.getText();
}
private static String findConditionConstraint(PsiElement element) {
PsiElement current = element;
while (current != null && !(current instanceof KtNamedFunction)) {
PsiElement parent = current.getParent();
if (parent instanceof KtIfExpression ifExpr) {
if (ifExpr.getCondition() != current) {
KtExpression cond = ifExpr.getCondition();
if (cond != null) {
String condText = cond.getText();
if (!condText.contains("state") && !condText.contains("State")) {
return condText;
}
}
}
}
current = parent;
}
return null;
}
}

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state_machine_exporter_kotlin/src/main/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinLanguageAnalyzerPlugin.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.AnalysisResult;
import click.kamil.springstatemachineexporter.analysis.service.CallGraphEngine;
import click.kamil.springstatemachineexporter.analysis.service.CodebaseIntelligenceProvider;
import click.kamil.springstatemachineexporter.spi.LanguageAnalyzerPlugin;
import click.kamil.springstatemachineexporter.spi.SourceContext;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
import java.util.Set;
import java.util.stream.Stream;
public class KotlinLanguageAnalyzerPlugin implements LanguageAnalyzerPlugin {
@Override
public boolean supports(Path projectRoot) {
if (projectRoot == null) return false;
try (Stream<Path> walk = Files.walk(projectRoot, 5)) { // Check top 5 levels
return walk.anyMatch(p -> p.toString().endsWith(".kt"));
} catch (Exception e) {
return false;
}
}
@Override
public SourceContext parseProject(Path projectRoot, List<String> classpath, Set<Path> sourcePaths) {
KotlinSourceContext context = new KotlinSourceContext(projectRoot, classpath);
return context;
}
@Override
public CallGraphEngine createCallGraphEngine(SourceContext context) {
if (context instanceof KotlinSourceContext ktContext) {
return new KotlinCallGraphEngine(ktContext);
}
throw new IllegalArgumentException("Expected KotlinSourceContext");
}
@Override
public CodebaseIntelligenceProvider createIntelligenceProvider(SourceContext context) {
if (context instanceof KotlinSourceContext ktContext) {
return new KotlinIntelligenceProvider(ktContext);
}
throw new IllegalArgumentException("Expected KotlinSourceContext");
}
@Override
public List<AnalysisResult> extractStateMachines(SourceContext context, boolean renderChoicesAsDiamonds) {
if (context instanceof KotlinSourceContext ktContext) {
return KotlinStateMachineExtractor.extract(ktContext, renderChoicesAsDiamonds);
}
throw new IllegalArgumentException("Expected KotlinSourceContext");
}
}

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state_machine_exporter_kotlin/src/main/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinResolutionUtils.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import org.jetbrains.kotlin.descriptors.ClassDescriptor;
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
import org.jetbrains.kotlin.descriptors.FunctionDescriptor;
import org.jetbrains.kotlin.descriptors.CallableDescriptor;
import org.jetbrains.kotlin.psi.KtClassOrObject;
import org.jetbrains.kotlin.psi.KtNamedFunction;
import org.jetbrains.kotlin.psi.KtExpression;
import org.jetbrains.kotlin.psi.KtStringTemplateExpression;
import org.jetbrains.kotlin.psi.KtNameReferenceExpression;
import org.jetbrains.kotlin.psi.KtDotQualifiedExpression;
import org.jetbrains.kotlin.resolve.BindingContext;
import org.jetbrains.kotlin.resolve.DescriptorUtils;
import org.jetbrains.kotlin.resolve.calls.util.CallUtilKt;
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
import org.jetbrains.kotlin.psi.KtProperty;
import org.jetbrains.kotlin.com.intellij.psi.PsiElement;
public class KotlinResolutionUtils {
public static String getClassFqn(KtClassOrObject ktClass, BindingContext bindingContext) {
if (bindingContext != null) {
ClassDescriptor descriptor = bindingContext.get(BindingContext.CLASS, ktClass);
if (descriptor != null) {
return DescriptorUtils.getFqNameSafe(descriptor).asString();
}
}
return ktClass.getFqName() != null ? ktClass.getFqName().asString() : ktClass.getName();
}
public static String getFunctionFqn(KtNamedFunction function, BindingContext bindingContext) {
if (bindingContext != null) {
FunctionDescriptor descriptor = bindingContext.get(BindingContext.FUNCTION, function);
if (descriptor != null) {
return getCallableFqn(descriptor);
}
}
return function.getName();
}
public static String getCallableFqn(CallableDescriptor descriptor) {
if (descriptor == null) return null;
DeclarationDescriptor containingDeclaration = descriptor.getContainingDeclaration();
if (containingDeclaration instanceof ClassDescriptor classDescriptor) {
return DescriptorUtils.getFqNameSafe(classDescriptor).asString() + "." + descriptor.getName().asString();
}
return DescriptorUtils.getFqNameSafe(descriptor).asString();
}
public static String resolveArgument(KtExpression expr, BindingContext bindingContext) {
if (expr == null) return "null";
if (expr instanceof KtStringTemplateExpression stringTemplate) {
return stringTemplate.getText().replace("\"", "");
}
if (expr instanceof KtNameReferenceExpression refExpr) {
ResolvedCall<? extends CallableDescriptor> resolvedCall = CallUtilKt.getResolvedCall(refExpr, bindingContext);
if (resolvedCall != null) {
CallableDescriptor descriptor = resolvedCall.getResultingDescriptor();
if (descriptor != null) {
// 1. Try compile-time constant value
if (descriptor instanceof org.jetbrains.kotlin.descriptors.VariableDescriptor varDescriptor) {
org.jetbrains.kotlin.resolve.constants.ConstantValue<?> initializer = varDescriptor.getCompileTimeInitializer();
if (initializer != null) {
Object val = initializer.getValue();
if (val != null) return val.toString();
}
}
// 2. Try property initializer expression
PsiElement decl =
org.jetbrains.kotlin.resolve.DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
if (decl instanceof KtProperty property) {
KtExpression initializer = property.getInitializer();
if (initializer != null) {
return resolveArgument(initializer, bindingContext);
}
}
// Fallback to FQN
return DescriptorUtils.getFqNameSafe(descriptor).asString();
}
}
return refExpr.getReferencedName();
}
if (expr instanceof KtDotQualifiedExpression dotExpr) {
ResolvedCall<? extends CallableDescriptor> resolvedCall = CallUtilKt.getResolvedCall(dotExpr, bindingContext);
if (resolvedCall != null) {
CallableDescriptor descriptor = resolvedCall.getResultingDescriptor();
if (descriptor != null) {
// 1. Try compile-time constant value
if (descriptor instanceof org.jetbrains.kotlin.descriptors.VariableDescriptor varDescriptor) {
org.jetbrains.kotlin.resolve.constants.ConstantValue<?> initializer = varDescriptor.getCompileTimeInitializer();
if (initializer != null) {
Object val = initializer.getValue();
if (val != null) return val.toString();
}
}
// 2. Try property initializer expression
PsiElement decl =
org.jetbrains.kotlin.resolve.DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
if (decl instanceof KtProperty property) {
KtExpression initializer = property.getInitializer();
if (initializer != null) {
return resolveArgument(initializer, bindingContext);
}
}
// Fallback to FQN
return DescriptorUtils.getFqNameSafe(descriptor).asString();
}
}
return dotExpr.getText();
}
return expr.getText();
}
public static java.util.List<String> resolveArgumentsList(KtExpression expr, BindingContext bindingContext) {
if (expr instanceof org.jetbrains.kotlin.psi.KtCallExpression callExpr) {
KtExpression callee = callExpr.getCalleeExpression();
if (callee != null) {
String name = callee.getText();
if (name.equals("setOf") || name.equals("listOf") || name.equals("arrayListOf") ||
name.equals("mutableSetOf") || name.equals("mutableListOf") || name.equals("hashSetOf") ||
name.equals("enumSetOf")) {
java.util.List<String> result = new java.util.ArrayList<>();
for (org.jetbrains.kotlin.psi.ValueArgument arg : callExpr.getValueArguments()) {
KtExpression innerExpr = arg.getArgumentExpression();
if (innerExpr != null) {
result.add(resolveArgument(innerExpr, bindingContext));
}
}
return result;
}
}
}
return java.util.Collections.singletonList(resolveArgument(expr, bindingContext));
}
}

209
state_machine_exporter_kotlin/src/main/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinSourceContext.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.LibraryHint;
import click.kamil.springstatemachineexporter.spi.SourceContext;
import org.jetbrains.kotlin.cli.jvm.compiler.EnvironmentConfigFiles;
import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment;
import org.jetbrains.kotlin.cli.jvm.compiler.CliBindingTrace;
import org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM;
import org.jetbrains.kotlin.resolve.BindingContext;
import org.jetbrains.kotlin.analyzer.AnalysisResult;
import org.jetbrains.kotlin.com.intellij.openapi.Disposable;
import org.jetbrains.kotlin.com.intellij.openapi.util.Disposer;
import org.jetbrains.kotlin.config.CompilerConfiguration;
import org.jetbrains.kotlin.config.CommonConfigurationKeys;
import org.jetbrains.kotlin.cli.jvm.config.JvmContentRootsKt;
import org.jetbrains.kotlin.psi.KtFile;
import org.jetbrains.kotlin.psi.KtPsiFactory;
import org.jetbrains.kotlin.psi.KtClassOrObject;
import org.jetbrains.kotlin.psi.KtSuperTypeListEntry;
import org.jetbrains.kotlin.psi.KtTypeReference;
import org.jetbrains.kotlin.types.KotlinType;
import org.jetbrains.kotlin.descriptors.ClassifierDescriptor;
import org.jetbrains.kotlin.resolve.DescriptorUtils;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class KotlinSourceContext implements SourceContext {
private final Path projectRoot;
private final Map<String, Object> cache = new HashMap<>();
private final List<KtFile> ktFiles = new ArrayList<>();
private KotlinCoreEnvironment environment;
private BindingContext bindingContext;
private final Map<String, List<String>> implementations = new HashMap<>();
private final Map<String, String> superclasses = new HashMap<>();
public KotlinSourceContext(Path projectRoot, List<String> classpath) {
this.projectRoot = projectRoot;
initEnvironment(classpath);
parseFiles();
analyze();
}
private void initEnvironment(List<String> classpath) {
Disposable disposable = Disposer.newDisposable();
CompilerConfiguration configuration = new CompilerConfiguration();
configuration.put(CommonConfigurationKeys.MODULE_NAME, "spring-state-machine-exporter");
configuration.put(org.jetbrains.kotlin.cli.common.CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY,
org.jetbrains.kotlin.cli.common.messages.MessageCollector.Companion.getNONE());
if (classpath != null) {
for (String cp : classpath) {
JvmContentRootsKt.addJvmClasspathRoot(configuration, new File(cp));
}
}
// Include the kotlin-stdlib and kotlin-reflect dependencies explicitly
File stdlib = getJarForClass(kotlin.Unit.class);
if (stdlib != null && stdlib.exists()) {
JvmContentRootsKt.addJvmClasspathRoot(configuration, stdlib);
}
File reflect = getJarForClass(kotlin.reflect.KClass.class);
if (reflect != null && reflect.exists()) {
JvmContentRootsKt.addJvmClasspathRoot(configuration, reflect);
}
environment = KotlinCoreEnvironment.createForProduction(
disposable, configuration, EnvironmentConfigFiles.JVM_CONFIG_FILES);
}
private static File getJarForClass(Class<?> clazz) {
try {
String path = clazz.getProtectionDomain().getCodeSource().getLocation().toURI().getPath();
return new File(path);
} catch (Exception e) {
return null;
}
}
private void parseFiles() {
if (projectRoot == null || !Files.exists(projectRoot)) return;
KtPsiFactory psiFactory = new KtPsiFactory(environment.getProject());
try (Stream<Path> walk = Files.walk(projectRoot)) {
List<Path> ktPaths = walk
.filter(Files::isRegularFile)
.filter(p -> p.toString().endsWith(".kt"))
.collect(Collectors.toList());
for (Path p : ktPaths) {
try {
String content = Files.readString(p);
KtFile ktFile = psiFactory.createFile(p.getFileName().toString(), content);
ktFiles.add(ktFile);
} catch (IOException e) {
System.err.println("Failed to read " + p);
}
}
} catch (IOException e) {
System.err.println("Failed to walk project root " + projectRoot);
}
}
private void analyze() {
if (ktFiles.isEmpty()) {
return;
}
CliBindingTrace trace = new CliBindingTrace();
AnalysisResult result = TopDownAnalyzerFacadeForJVM.analyzeFilesWithJavaIntegration(
environment.getProject(),
ktFiles,
trace,
environment.getConfiguration(),
(scope) -> environment.createPackagePartProvider(scope)
);
this.bindingContext = result.getBindingContext();
buildSupertypesMap();
}
private void buildSupertypesMap() {
if (bindingContext == null) return;
for (KtFile ktFile : ktFiles) {
ktFile.accept(new org.jetbrains.kotlin.psi.KtTreeVisitorVoid() {
@Override
public void visitClassOrObject(KtClassOrObject ktClass) {
super.visitClassOrObject(ktClass);
String classFqn = KotlinResolutionUtils.getClassFqn(ktClass, bindingContext);
if (classFqn == null) return;
for (KtSuperTypeListEntry entry : ktClass.getSuperTypeListEntries()) {
KtTypeReference typeRef = entry.getTypeReference();
if (typeRef != null) {
KotlinType kotlinType = bindingContext.get(BindingContext.TYPE, typeRef);
if (kotlinType != null) {
ClassifierDescriptor classifier = kotlinType.getConstructor().getDeclarationDescriptor();
if (classifier != null) {
String superFqn = DescriptorUtils.getFqNameSafe(classifier).asString();
superclasses.put(classFqn, superFqn);
implementations.computeIfAbsent(superFqn, k -> new ArrayList<>()).add(classFqn);
}
}
}
}
}
});
}
}
public List<KtFile> getKtFiles() {
return ktFiles;
}
public KotlinCoreEnvironment getEnvironment() {
return environment;
}
public BindingContext getBindingContext() {
return bindingContext;
}
public Map<String, List<String>> getImplementations() {
return implementations;
}
public Map<String, String> getSuperclasses() {
return superclasses;
}
@Override
public Path getProjectRoot() {
return projectRoot;
}
@Override
public String getRelativePath(Path fullPath) {
if (projectRoot != null && fullPath.isAbsolute() && fullPath.startsWith(projectRoot)) {
return projectRoot.relativize(fullPath).toString();
}
return fullPath.getFileName().toString();
}
@Override
public String getRelativePath(String fqn) {
return fqn; // Simplified
}
@Override
public List<LibraryHint> getLibraryHints() {
return Collections.emptyList();
}
@Override
public Map<String, Map<String, String>> getProperties() {
return Collections.emptyMap();
}
@Override
public Map<String, Object> getCache() {
return cache;
}
}

583
state_machine_exporter_kotlin/src/main/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinStateMachineExtractor.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.AnalysisResult;
import click.kamil.springstatemachineexporter.model.Transition;
import click.kamil.springstatemachineexporter.model.State;
import click.kamil.springstatemachineexporter.model.Event;
import click.kamil.springstatemachineexporter.model.TransitionType;
import click.kamil.springstatemachineexporter.model.Action;
import click.kamil.springstatemachineexporter.model.Guard;
import org.jetbrains.kotlin.psi.*;
import org.jetbrains.kotlin.resolve.BindingContext;
import org.jetbrains.kotlin.com.intellij.psi.PsiElement;
import org.jetbrains.kotlin.resolve.calls.util.CallUtilKt;
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
import java.util.*;
public class KotlinStateMachineExtractor {
public static List<AnalysisResult> extract(KotlinSourceContext context, boolean renderChoicesAsDiamonds) {
List<AnalysisResult> results = new ArrayList<>();
BindingContext bindingContext = context.getBindingContext();
if (bindingContext == null) return results;
for (KtFile ktFile : context.getKtFiles()) {
ktFile.accept(new KtTreeVisitorVoid() {
@Override
public void visitClassOrObject(KtClassOrObject ktClass) {
super.visitClassOrObject(ktClass);
boolean isConfig = false;
for (KtAnnotationEntry annotation : ktClass.getAnnotationEntries()) {
String name = annotation.getShortName() != null ? annotation.getShortName().asString() : "";
if ("EnableStateMachine".equals(name) || "EnableStateMachineFactory".equals(name)) {
isConfig = true;
}
}
for (KtSuperTypeListEntry entry : ktClass.getSuperTypeListEntries()) {
String text = entry.getText();
if (text.contains("StateMachineConfigurerAdapter") || text.contains("EnumStateMachineConfigurerAdapter")) {
isConfig = true;
}
}
if (isConfig) {
String classFqn = KotlinResolutionUtils.getClassFqn(ktClass, bindingContext);
Set<State> states = new LinkedHashSet<>();
List<Transition> transitions = new ArrayList<>();
Set<String> startStates = new LinkedHashSet<>();
Set<String> endStates = new LinkedHashSet<>();
for (KtDeclaration decl : ktClass.getDeclarations()) {
if (decl instanceof KtNamedFunction function) {
String funcName = function.getName();
if ("configure".equals(funcName)) {
parseConfigureFunction(function, context, states, transitions, startStates, endStates);
}
}
}
if (!states.isEmpty() || !transitions.isEmpty()) {
if (startStates.isEmpty() && !states.isEmpty()) {
for (State s : states) {
// With the new State record, rawName is the first field
startStates.add(s.rawName());
break;
}
}
results.add(AnalysisResult.builder()
.name(classFqn)
.states(states)
.transitions(transitions)
.startStates(startStates)
.endStates(endStates)
.renderChoicesAsDiamonds(renderChoicesAsDiamonds)
.build());
}
}
}
});
}
return results;
}
private static void parseConfigureFunction(KtNamedFunction function, KotlinSourceContext context,
Set<State> states, List<Transition> transitions,
Set<String> startStates, Set<String> endStates) {
BindingContext bindingContext = context.getBindingContext();
Map<String, KtExpression> varMap = new HashMap<>();
function.accept(new KtTreeVisitorVoid() {
@Override
public void visitProperty(KtProperty property) {
super.visitProperty(property);
if (property.getName() != null && property.getInitializer() != null) {
varMap.put(property.getName(), property.getInitializer());
}
}
});
function.accept(new KtTreeVisitorVoid() {
@Override
public void visitDotQualifiedExpression(KtDotQualifiedExpression expression) {
super.visitDotQualifiedExpression(expression);
if (!(expression.getParent() instanceof KtDotQualifiedExpression)) {
checkExpression(expression);
}
}
@Override
public void visitCallExpression(KtCallExpression expression) {
super.visitCallExpression(expression);
if (!(expression.getParent() instanceof KtDotQualifiedExpression)) {
checkExpression(expression);
}
}
private void checkExpression(KtExpression expression) {
String text = expression.getText();
if (text.contains("initial") || text.contains("state") || text.contains("states")) {
parseStateCalls(expression, bindingContext, states, startStates);
}
if (text.contains("withExternal") || text.contains("withInternal") || text.contains("withLocal") ||
text.contains("withChoice") || text.contains("withJunction") ||
text.contains("withFork") || text.contains("withJoin") ||
text.contains("source") || text.contains("sources") ||
text.contains("target") || text.contains("targets") ||
text.contains("event") || text.contains("timer") ||
text.contains("first") || text.contains("then") || text.contains("last")) {
parseTransitionChain(expression, context, transitions, varMap);
}
}
});
}
private static void parseStateCalls(KtExpression expression, BindingContext bindingContext,
Set<State> states, Set<String> startStates) {
KtExpression current = expression;
while (current instanceof KtDotQualifiedExpression dotExpr) {
if (dotExpr.getSelectorExpression() instanceof KtCallExpression call) {
String name = getCallName(call);
if ("initial".equals(name)) {
String stateVal = getFirstArgAsString(call, bindingContext);
if (stateVal != null) {
states.add(new State(stateVal, stateVal));
startStates.add(stateVal);
}
} else if ("state".equals(name) || "states".equals(name)) {
for (ValueArgument arg : call.getValueArguments()) {
KtExpression argExpr = arg.getArgumentExpression();
if (argExpr != null) {
List<String> stateVals = KotlinResolutionUtils.resolveArgumentsList(argExpr, bindingContext);
for (String stateVal : stateVals) {
states.add(new State(stateVal, stateVal));
}
}
}
}
}
current = dotExpr.getReceiverExpression();
}
if (current instanceof KtCallExpression call) {
String name = getCallName(call);
if ("initial".equals(name)) {
String stateVal = getFirstArgAsString(call, bindingContext);
if (stateVal != null) {
states.add(new State(stateVal, stateVal));
startStates.add(stateVal);
}
}
}
}
private static class ChoiceBranch {
String branchType;
String target;
Guard guard;
Action action;
}
private static void parseTransitionChain(KtExpression expression, KotlinSourceContext context,
List<Transition> transitions, Map<String, KtExpression> varMap) {
BindingContext bindingContext = context.getBindingContext();
List<String> sources = new ArrayList<>();
List<String> targets = new ArrayList<>();
List<Guard> guards = new ArrayList<>();
List<Action> actions = new ArrayList<>();
String event = null;
TransitionType type = TransitionType.EXTERNAL;
List<ChoiceBranch> choiceBranches = new ArrayList<>();
KtExpression current = expression;
while (current != null) {
current = resolveExpression(current, varMap);
KtCallExpression call = null;
if (current instanceof KtDotQualifiedExpression dotExpr) {
if (dotExpr.getSelectorExpression() instanceof KtCallExpression selectorCall) {
call = selectorCall;
}
current = dotExpr.getReceiverExpression();
} else if (current instanceof KtCallExpression callExpr) {
call = callExpr;
current = null;
} else {
break;
}
if (call != null) {
String name = getCallName(call);
if ("source".equals(name) || "sources".equals(name)) {
for (ValueArgument arg : call.getValueArguments()) {
sources.addAll(KotlinResolutionUtils.resolveArgumentsList(arg.getArgumentExpression(), bindingContext));
}
} else if ("target".equals(name) || "targets".equals(name)) {
for (ValueArgument arg : call.getValueArguments()) {
targets.addAll(KotlinResolutionUtils.resolveArgumentsList(arg.getArgumentExpression(), bindingContext));
}
} else if ("event".equals(name)) {
event = getFirstArgAsString(call, bindingContext);
} else if ("timer".equals(name) || "timerOnce".equals(name)) {
KtExpression argExpr = getArgAsExpression(call, 0, "period", "once");
if (argExpr != null) {
event = name + "(" + argExpr.getText() + ")";
}
} else if ("guard".equals(name) || "guardExpression".equals(name)) {
KtExpression expr = getArgAsExpression(call, 0, "guard", "guardExpression");
if (expr != null) guards.add(createGuard(expr, bindingContext, context));
} else if ("guards".equals(name)) {
for (int i = 0; i < call.getValueArguments().size(); i++) {
KtExpression expr = getArgAsExpression(call, i, "guard");
if (expr != null) guards.add(createGuard(expr, bindingContext, context));
}
} else if ("action".equals(name)) {
KtExpression expr = getArgAsExpression(call, 0, "action");
if (expr != null) actions.add(createAction(expr, bindingContext, context));
} else if ("actions".equals(name)) {
for (int i = 0; i < call.getValueArguments().size(); i++) {
KtExpression expr = getArgAsExpression(call, i, "action");
if (expr != null) actions.add(createAction(expr, bindingContext, context));
}
} else if ("first".equals(name) || "then".equals(name) || "last".equals(name)) {
ChoiceBranch b = new ChoiceBranch();
b.branchType = name;
KtExpression targetExpr = getArgAsExpression(call, 0, "target", "state");
b.target = targetExpr != null ? KotlinResolutionUtils.resolveArgument(targetExpr, bindingContext) : null;
if ("last".equals(name)) {
KtExpression actionExpr = getArgAsExpression(call, 1, "action");
if (actionExpr != null) {
b.action = createAction(actionExpr, bindingContext, context);
}
} else {
KtExpression guardExpr = getArgAsExpression(call, 1, "guard");
if (guardExpr != null) {
b.guard = createGuard(guardExpr, bindingContext, context);
}
KtExpression actionExpr = getArgAsExpression(call, 2, "action");
if (actionExpr != null) {
b.action = createAction(actionExpr, bindingContext, context);
}
}
choiceBranches.add(b);
} else if ("withChoice".equals(name) || "withJunction".equals(name)) {
type = "withChoice".equals(name) ? TransitionType.CHOICE : TransitionType.JUNCTION;
int order = 0;
java.util.Collections.reverse(choiceBranches);
List<Transition> temp = new ArrayList<>();
for (ChoiceBranch b : choiceBranches) {
Transition t = new Transition();
t.setType(type);
for (String src : sources) {
t.getSourceStates().add(new State(src, src));
}
if (b.target != null) {
t.getTargetStates().add(new State(b.target, b.target));
}
if (b.guard != null) t.getGuards().add(b.guard);
if (b.action != null) t.getActions().add(b.action);
t.setOrder(order++);
temp.add(t);
}
transitions.addAll(0, temp);
sources.clear();
targets.clear();
guards.clear();
actions.clear();
event = null;
choiceBranches.clear();
type = TransitionType.EXTERNAL;
} else if ("withExternal".equals(name) || "withInternal".equals(name) || "withLocal".equals(name) ||
"withFork".equals(name) || "withJoin".equals(name)) {
if ("withInternal".equals(name)) {
type = TransitionType.INTERNAL;
} else if ("withLocal".equals(name)) {
type = TransitionType.LOCAL;
} else if ("withFork".equals(name)) {
type = TransitionType.FORK;
} else if ("withJoin".equals(name)) {
type = TransitionType.JOIN;
} else {
type = TransitionType.EXTERNAL;
}
if (!sources.isEmpty() || !targets.isEmpty()) {
Transition t = new Transition();
t.setType(type);
for (String src : sources) {
t.getSourceStates().add(new State(src, src));
}
for (String tgt : targets) {
t.getTargetStates().add(new State(tgt, tgt));
}
if (event != null) {
t.setEvent(new Event(event, event));
}
t.getGuards().addAll(guards);
t.getActions().addAll(actions);
transitions.add(0, t);
}
sources.clear();
targets.clear();
guards.clear();
actions.clear();
event = null;
choiceBranches.clear();
type = TransitionType.EXTERNAL;
}
}
}
if (!sources.isEmpty() || !targets.isEmpty() || !choiceBranches.isEmpty()) {
if (!choiceBranches.isEmpty()) {
int order = 0;
java.util.Collections.reverse(choiceBranches);
List<Transition> temp = new ArrayList<>();
for (ChoiceBranch b : choiceBranches) {
Transition t = new Transition();
t.setType(type);
for (String src : sources) {
t.getSourceStates().add(new State(src, src));
}
if (b.target != null) {
t.getTargetStates().add(new State(b.target, b.target));
}
if (b.guard != null) t.getGuards().add(b.guard);
if (b.action != null) t.getActions().add(b.action);
t.setOrder(order++);
temp.add(t);
}
transitions.addAll(0, temp);
} else {
Transition t = new Transition();
t.setType(type);
for (String src : sources) {
t.getSourceStates().add(new State(src, src));
}
for (String tgt : targets) {
t.getTargetStates().add(new State(tgt, tgt));
}
if (event != null) {
t.setEvent(new Event(event, event));
}
t.getGuards().addAll(guards);
t.getActions().addAll(actions);
transitions.add(0, t);
}
}
}
private static String getCallName(KtCallExpression call) {
KtExpression callee = call.getCalleeExpression();
return callee != null ? callee.getText() : "";
}
private static String getFirstArgAsString(KtCallExpression call, BindingContext bindingContext) {
KtExpression argExpr = getArgAsExpression(call, 0, "event", "state", "target", "source");
if (argExpr != null) {
return KotlinResolutionUtils.resolveArgument(argExpr, bindingContext);
}
return null;
}
private static KtExpression getArgAsExpression(KtCallExpression call, int index, String... paramNames) {
for (ValueArgument arg : call.getValueArguments()) {
if (arg instanceof KtValueArgument valueArg) {
if (valueArg.getArgumentName() != null && valueArg.getArgumentName().getAsName() != null) {
String argName = valueArg.getArgumentName().getAsName().asString();
for (String name : paramNames) {
if (name.equals(argName)) {
return valueArg.getArgumentExpression();
}
}
}
}
}
if (call.getValueArguments().size() > index) {
ValueArgument arg = call.getValueArguments().get(index);
if (arg instanceof KtValueArgument valueArg) {
if (valueArg.getArgumentName() == null) {
return valueArg.getArgumentExpression();
}
}
}
if (!call.getLambdaArguments().isEmpty()) {
for (String name : paramNames) {
if ("guard".equals(name) || "action".equals(name) || "listener".equals(name)) {
return call.getLambdaArguments().get(0).getArgumentExpression();
}
}
}
return null;
}
private static KtExpression resolveExpression(KtExpression expr, Map<String, KtExpression> varMap) {
if (expr instanceof KtNameReferenceExpression refExpr) {
String name = refExpr.getReferencedName();
if (varMap.containsKey(name)) {
return resolveExpression(varMap.get(name), varMap);
}
}
return expr;
}
private static int getLineNumber(PsiElement element) {
if (element == null) return 0;
String text = element.getContainingFile().getText();
int offset = element.getTextRange().getStartOffset();
int line = 1;
for (int i = 0; i < offset && i < text.length(); i++) {
if (text.charAt(i) == '\n') {
line++;
}
}
return line;
}
private static String getEnclosingClassFqn(PsiElement element, BindingContext bindingContext) {
PsiElement current = element;
while (current != null) {
if (current instanceof KtClassOrObject ktClass) {
return KotlinResolutionUtils.getClassFqn(ktClass, bindingContext);
}
current = current.getParent();
}
return null;
}
private static String getRelativePathForElement(PsiElement element, KotlinSourceContext context) {
if (element == null) return null;
org.jetbrains.kotlin.com.intellij.psi.PsiFile file = element.getContainingFile();
if (file instanceof KtFile ktFile) {
if (ktFile.getVirtualFile() != null) {
String pathStr = ktFile.getVirtualFile().getPath();
if (pathStr != null) {
return context.getRelativePath(java.nio.file.Path.of(pathStr));
}
}
return ktFile.getName();
}
return null;
}
private static String extractInternalLogic(KtExpression expr, BindingContext bindingContext) {
if (expr == null) return null;
if (expr instanceof KtLambdaExpression) {
return expr.getText();
}
if (expr instanceof KtNamedFunction) {
return expr.getText();
}
if (expr instanceof KtCallableReferenceExpression callableRef) {
org.jetbrains.kotlin.psi.KtSimpleNameExpression refName = callableRef.getCallableReference();
if (refName != null) {
org.jetbrains.kotlin.descriptors.DeclarationDescriptor descriptor =
bindingContext.get(BindingContext.REFERENCE_TARGET, refName);
if (descriptor != null) {
org.jetbrains.kotlin.com.intellij.psi.PsiElement decl =
org.jetbrains.kotlin.resolve.DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
if (decl instanceof KtNamedFunction helperFunc) {
return helperFunc.getText();
}
}
}
}
if (expr instanceof KtCallExpression callExpr) {
ResolvedCall<? extends org.jetbrains.kotlin.descriptors.CallableDescriptor> resolvedCall =
org.jetbrains.kotlin.resolve.calls.util.CallUtilKt.getResolvedCall(callExpr, bindingContext);
if (resolvedCall != null) {
org.jetbrains.kotlin.descriptors.CallableDescriptor descriptor = resolvedCall.getResultingDescriptor();
if (descriptor != null) {
org.jetbrains.kotlin.com.intellij.psi.PsiElement decl =
org.jetbrains.kotlin.resolve.DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
if (decl instanceof KtNamedFunction helperFunc) {
KtExpression body = helperFunc.getBodyExpression();
if (body != null) {
if (!helperFunc.hasBlockBody()) {
return body.getText();
} else if (body instanceof KtBlockExpression block) {
List<KtExpression> statements = block.getStatements();
if (statements.size() == 1 && statements.get(0) instanceof KtReturnExpression returnExpr) {
KtExpression retVal = returnExpr.getReturnedExpression();
if (retVal != null) {
return retVal.getText();
}
}
}
}
return helperFunc.getText();
}
}
}
}
if (expr instanceof KtNameReferenceExpression refExpr) {
org.jetbrains.kotlin.descriptors.DeclarationDescriptor descriptor =
bindingContext.get(BindingContext.REFERENCE_TARGET, refExpr);
if (descriptor != null) {
org.jetbrains.kotlin.com.intellij.psi.PsiElement decl =
org.jetbrains.kotlin.resolve.DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
if (decl instanceof KtProperty property) {
KtExpression initializer = property.getInitializer();
if (initializer != null) {
return extractInternalLogic(initializer, bindingContext);
}
}
if (decl instanceof KtClassOrObject ktClass) {
for (KtDeclaration childDecl : ktClass.getDeclarations()) {
if (childDecl instanceof KtNamedFunction func) {
String name = func.getName();
if ("evaluate".equals(name) || "execute".equals(name)) {
return func.getText();
}
}
}
return ktClass.getText();
}
}
}
return null;
}
private static boolean isLambdaOrAnonymous(KtExpression expr) {
if (expr == null) return false;
if (expr instanceof KtLambdaExpression) return true;
if (expr instanceof KtNamedFunction namedFunc) {
return namedFunc.getName() == null;
}
if (expr instanceof KtObjectLiteralExpression) return true;
return false;
}
private static Guard createGuard(KtExpression expr, BindingContext bindingContext, KotlinSourceContext context) {
boolean isLambda = isLambdaOrAnonymous(expr);
String internalLogic = extractInternalLogic(expr, bindingContext);
int lineNumber = getLineNumber(expr);
String fqn = getEnclosingClassFqn(expr, bindingContext);
String sourceFile = getRelativePathForElement(expr, context);
return Guard.of(expr.getText(), isLambda, internalLogic, lineNumber, fqn, sourceFile);
}
private static Action createAction(KtExpression expr, BindingContext bindingContext, KotlinSourceContext context) {
boolean isLambda = isLambdaOrAnonymous(expr);
String internalLogic = extractInternalLogic(expr, bindingContext);
int lineNumber = getLineNumber(expr);
String fqn = getEnclosingClassFqn(expr, bindingContext);
String sourceFile = getRelativePathForElement(expr, context);
return Action.of(expr.getText(), isLambda, internalLogic, lineNumber, fqn, sourceFile);
}
}

231
state_machine_exporter_kotlin/src/test/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinCallGraphEngineTest.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.CallChain;
import click.kamil.springstatemachineexporter.analysis.model.EntryPoint;
import click.kamil.springstatemachineexporter.analysis.model.TriggerPoint;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import static org.assertj.core.api.Assertions.assertThat;
public class KotlinCallGraphEngineTest {
@TempDir
Path tempDir;
@Test
public void testCallChainResolution() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"annotation class GetMapping\n" +
"\n" +
"class Controller(val service: MyService) {\n" +
" @GetMapping\n" +
" fun handleRequest() {\n" +
" service.process()\n" +
" }\n" +
"}\n" +
"\n" +
"class MyService {\n" +
" fun process() {\n" +
" sendEvent(\"START\")\n" +
" }\n" +
" \n" +
" fun sendEvent(event: String) {}\n" +
"}\n";
Path ktFile = tempDir.resolve("App.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
KotlinIntelligenceProvider provider = new KotlinIntelligenceProvider(context);
List<EntryPoint> entryPoints = provider.findEntryPoints();
List<TriggerPoint> triggers = provider.findTriggerPoints();
assertThat(entryPoints).hasSize(1);
assertThat(entryPoints.get(0).getName()).isEqualTo("click.kamil.test.Controller.handleRequest");
assertThat(entryPoints.get(0).getClassName()).isEqualTo("click.kamil.test.Controller");
assertThat(entryPoints.get(0).getMethodName()).isEqualTo("handleRequest");
assertThat(triggers).hasSize(1);
assertThat(triggers.get(0).getEvent()).isEqualTo("START");
assertThat(triggers.get(0).getClassName()).isEqualTo("click.kamil.test.MyService");
assertThat(triggers.get(0).getMethodName()).isEqualTo("process");
List<CallChain> chains = provider.findCallChains(entryPoints, triggers);
assertThat(chains).hasSize(1);
CallChain chain = chains.get(0);
assertThat(chain.getEntryPoint()).isEqualTo(entryPoints.get(0));
assertThat(chain.getTriggerPoint()).isEqualTo(triggers.get(0));
assertThat(chain.getMethodChain()).containsExactly(
"click.kamil.test.Controller.handleRequest",
"click.kamil.test.MyService.process"
);
}
@Test
public void testPolymorphicCallChainResolution() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"annotation class GetMapping\n" +
"\n" +
"interface BaseService {\n" +
" fun process()\n" +
"}\n" +
"\n" +
"class Controller(val service: BaseService) {\n" +
" @GetMapping\n" +
" fun handleRequest() {\n" +
" service.process()\n" +
" }\n" +
"}\n" +
"\n" +
"class MyServiceImpl : BaseService {\n" +
" override fun process() {\n" +
" sendEvent(\"START\")\n" +
" }\n" +
" \n" +
" fun sendEvent(event: String) {}\n" +
"}\n";
Path ktFile = tempDir.resolve("AppPolymorphic.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
KotlinIntelligenceProvider provider = new KotlinIntelligenceProvider(context);
List<EntryPoint> entryPoints = provider.findEntryPoints();
List<TriggerPoint> triggers = provider.findTriggerPoints();
assertThat(entryPoints).hasSize(1);
assertThat(triggers).hasSize(1);
List<CallChain> chains = provider.findCallChains(entryPoints, triggers);
assertThat(chains).hasSize(1);
CallChain chain = chains.get(0);
assertThat(chain.getMethodChain()).containsExactly(
"click.kamil.test.Controller.handleRequest",
"click.kamil.test.MyServiceImpl.process"
);
}
@Test
public void testMixedLanguageCallChainResolution() throws IOException {
String ktCode = "package click.kamil.demo\n" +
"\n" +
"class KotlinService {\n" +
" fun process() {\n" +
" sendEvent(\"MIXED_EVENT\")\n" +
" }\n" +
" fun sendEvent(event: String) {}\n" +
"}\n";
Path ktFile = tempDir.resolve("KotlinService.kt");
Files.writeString(ktFile, ktCode);
String javaCode = "package click.kamil.demo;\n" +
"\n" +
"@org.springframework.web.bind.annotation.RestController\n" +
"public class JavaController {\n" +
" private final KotlinService service;\n" +
" public JavaController(KotlinService service) {\n" +
" this.service = service;\n" +
" }\n" +
" @org.springframework.web.bind.annotation.GetMapping\n" +
" public void handleRequest() {\n" +
" service.process();\n" +
" }\n" +
"}\n";
String annCode = "package org.springframework.web.bind.annotation;\n" +
"public @interface GetMapping {}\n";
String rcAnnCode = "package org.springframework.web.bind.annotation;\n" +
"public @interface RestController {}\n";
Files.createDirectories(tempDir.resolve("src/main/java/click/kamil/demo"));
Files.createDirectories(tempDir.resolve("src/main/java/org/springframework/web/bind/annotation"));
Files.writeString(tempDir.resolve("src/main/java/click/kamil/demo/JavaController.java"), javaCode);
Files.writeString(tempDir.resolve("src/main/java/org/springframework/web/bind/annotation/GetMapping.java"), annCode);
Files.writeString(tempDir.resolve("src/main/java/org/springframework/web/bind/annotation/RestController.java"), rcAnnCode);
KotlinSourceContext ktContext = new KotlinSourceContext(tempDir, Collections.emptyList());
KotlinIntelligenceProvider ktProvider = new KotlinIntelligenceProvider(ktContext);
click.kamil.springstatemachineexporter.plugin.java.JavaLanguageAnalyzerPlugin javaPlugin =
new click.kamil.springstatemachineexporter.plugin.java.JavaLanguageAnalyzerPlugin();
click.kamil.springstatemachineexporter.spi.SourceContext javaContext =
javaPlugin.parseProject(tempDir, Collections.emptyList(), java.util.Set.of(tempDir));
click.kamil.springstatemachineexporter.analysis.service.CodebaseIntelligenceProvider javaProvider =
javaPlugin.createIntelligenceProvider(javaContext);
var providers = List.of(ktProvider, javaProvider);
var engines = List.of(new KotlinCallGraphEngine(ktContext), javaPlugin.createCallGraphEngine(javaContext));
var compositeProvider = new click.kamil.springstatemachineexporter.analysis.service.CompositeIntelligenceProvider(providers, engines);
List<EntryPoint> entryPoints = compositeProvider.findEntryPoints();
List<TriggerPoint> triggers = compositeProvider.findTriggerPoints();
assertThat(entryPoints).isNotEmpty();
assertThat(triggers).isNotEmpty();
List<CallChain> chains = compositeProvider.findCallChains(entryPoints, triggers);
assertThat(chains).hasSize(1);
}
@Test
public void testSealedHierarchyStateExtraction() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"annotation class EnableStateMachine\n" +
"\n" +
"sealed class MyStates {\n" +
" object STATE_A : MyStates()\n" +
" object STATE_B : MyStates()\n" +
"}\n" +
"\n" +
"class StateConfigurer {\n" +
" fun withStates(): StateConfigurer = this\n" +
" fun initial(s: String): StateConfigurer = this\n" +
" fun state(s: String): StateConfigurer = this\n" +
"}\n" +
"\n" +
"class TransitionConfigurer {\n" +
" fun withExternal(): TransitionConfigurer = this\n" +
" fun source(s: String): TransitionConfigurer = this\n" +
" fun target(s: String): TransitionConfigurer = this\n" +
" fun event(e: String): TransitionConfigurer = this\n" +
"}\n" +
"\n" +
"class StateMachineConfigurerAdapter<S, E>\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyConfig : StateMachineConfigurerAdapter<MyStates, String>() {\n" +
" fun configure(states: StateConfigurer) {\n" +
" states.withStates().initial(\"STATE_A\").state(\"STATE_B\")\n" +
" }\n" +
" fun configure(transitions: TransitionConfigurer) {\n" +
" transitions.withExternal().source(\"STATE_A\").target(\"STATE_B\").event(\"EVENT_X\")\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("SealedStates.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<click.kamil.springstatemachineexporter.analysis.model.AnalysisResult> results =
new KotlinLanguageAnalyzerPlugin().extractStateMachines(context, true);
assertThat(results).isNotEmpty();
click.kamil.springstatemachineexporter.analysis.model.AnalysisResult result = results.get(0);
assertThat(result.getStates()).extracting("rawName").containsExactlyInAnyOrder("STATE_A", "STATE_B");
assertThat(result.getTransitions()).hasSize(1);
assertThat(result.getTransitions().get(0).getEvent().rawName()).isEqualTo("EVENT_X");
}
}

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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.EntryPoint;
import click.kamil.springstatemachineexporter.analysis.model.TriggerPoint;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import static org.assertj.core.api.Assertions.assertThat;
public class KotlinIntelligenceProviderTest {
@TempDir
Path tempDir;
@Test
public void testFindEntryPointsAndTriggerPoints() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.web.bind.annotation.RestController\n" +
"import org.springframework.web.bind.annotation.RequestMapping\n" +
"import org.springframework.web.bind.annotation.PostMapping\n" +
"import org.springframework.web.bind.annotation.RequestBody\n" +
"import org.springframework.kafka.annotation.KafkaListener\n" +
"import org.springframework.statemachine.StateMachine\n" +
"\n" +
"@RestController\n" +
"@RequestMapping(\"/api/orders\")\n" +
"class OrderController {\n" +
"\n" +
" @PostMapping(\"/create\")\n" +
" fun createOrder(@RequestBody orderId: String, sm: StateMachine<String, String>) {\n" +
" val userRole = \"admin\"\n" +
" if (userRole == \"admin\") {\n" +
" val state = \"PENDING\"\n" +
" if (state == \"PENDING\") {\n" +
" sm.sendEvent(\"PAY\")\n" +
" }\n" +
" }\n" +
" }\n" +
"\n" +
" @KafkaListener(topics = [\"order-events\"])\n" +
" fun onOrderEvent(message: String) {\n" +
" println(message)\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("OrderController.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
KotlinIntelligenceProvider provider = new KotlinIntelligenceProvider(context);
// 1. Entry Points assertions
List<EntryPoint> entryPoints = provider.findEntryPoints();
assertThat(entryPoints).hasSize(2);
// REST Entry Point
EntryPoint restEp = entryPoints.stream()
.filter(ep -> ep.getType() == EntryPoint.Type.REST)
.findFirst().orElseThrow();
assertThat(restEp.getName()).isEqualTo("POST /api/orders/create");
assertThat(restEp.getClassName()).isEqualTo("click.kamil.test.OrderController");
assertThat(restEp.getMethodName()).isEqualTo("createOrder");
assertThat(restEp.getSourceFile()).isEqualTo("OrderController.kt");
assertThat(restEp.getMetadata().get("path")).isEqualTo("/api/orders/create");
assertThat(restEp.getMetadata().get("verb")).isEqualTo("POST");
assertThat(restEp.getParameters()).hasSize(2);
assertThat(restEp.getParameters().get(0).getName()).isEqualTo("orderId");
assertThat(restEp.getParameters().get(0).getType()).contains("String");
assertThat(restEp.getParameters().get(0).getAnnotations()).contains("RequestBody");
// Messaging Entry Point
EntryPoint msgEp = entryPoints.stream()
.filter(ep -> ep.getType() == EntryPoint.Type.KAFKA)
.findFirst().orElseThrow();
assertThat(msgEp.getName()).isEqualTo("KAFKA: order-events");
assertThat(msgEp.getClassName()).isEqualTo("click.kamil.test.OrderController");
assertThat(msgEp.getMethodName()).isEqualTo("onOrderEvent");
assertThat(msgEp.getSourceFile()).isEqualTo("OrderController.kt");
assertThat(msgEp.getMetadata().get("destination")).isEqualTo("order-events");
assertThat(msgEp.getParameters()).hasSize(1);
assertThat(msgEp.getParameters().get(0).getName()).isEqualTo("message");
// 2. Trigger Points assertions
List<TriggerPoint> triggers = provider.findTriggerPoints();
assertThat(triggers).hasSize(1);
TriggerPoint trigger = triggers.get(0);
assertThat(trigger.getEvent()).isEqualTo("PAY");
assertThat(trigger.getSourceState()).isEqualTo("PENDING");
assertThat(trigger.getClassName()).isEqualTo("click.kamil.test.OrderController");
assertThat(trigger.getMethodName()).isEqualTo("createOrder");
assertThat(trigger.getSourceFile()).isEqualTo("OrderController.kt");
assertThat(trigger.getLineNumber()).isEqualTo(20);
assertThat(trigger.getStateTypeFqn()).contains("String");
assertThat(trigger.getEventTypeFqn()).contains("String");
assertThat(trigger.isExternal()).isTrue();
assertThat(trigger.getConstraint()).isEqualTo("userRole == \"admin\"");
}
}

84
state_machine_exporter_kotlin/src/test/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinSemanticResolutionTest.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import org.jetbrains.kotlin.psi.KtClass;
import org.jetbrains.kotlin.psi.KtFile;
import org.jetbrains.kotlin.psi.KtNamedFunction;
import org.jetbrains.kotlin.psi.KtTreeVisitorVoid;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
import static org.assertj.core.api.Assertions.assertThat;
public class KotlinSemanticResolutionTest {
@TempDir
Path tempDir;
@Test
public void testBindingContextResolution() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"class MyTestClass {\n" +
" fun process(event: String) {\n" +
" println(event)\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyTestClass.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
assertThat(context.getKtFiles()).hasSize(1);
KtFile parsedFile = context.getKtFiles().get(0);
AtomicReference<KtClass> ktClassRef = new AtomicReference<>();
AtomicReference<KtNamedFunction> ktFunctionRef = new AtomicReference<>();
parsedFile.accept(new KtTreeVisitorVoid() {
@Override
public void visitClass(KtClass klass) {
ktClassRef.set(klass);
super.visitClass(klass);
}
@Override
public void visitNamedFunction(KtNamedFunction function) {
ktFunctionRef.set(function);
super.visitNamedFunction(function);
}
});
assertThat(ktClassRef.get()).isNotNull();
assertThat(ktFunctionRef.get()).isNotNull();
String classFqn = KotlinResolutionUtils.getClassFqn(ktClassRef.get(), context.getBindingContext());
String functionFqn = KotlinResolutionUtils.getFunctionFqn(ktFunctionRef.get(), context.getBindingContext());
assertThat(classFqn).isEqualTo("click.kamil.test.MyTestClass");
assertThat(functionFqn).isEqualTo("click.kamil.test.MyTestClass.process");
}
@Test
public void testSupertypeResolution() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"interface BaseService\n" +
"class MyServiceImpl : BaseService\n";
Path ktFile = tempDir.resolve("Supertypes.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
assertThat(context.getSuperclasses()).containsEntry("click.kamil.test.MyServiceImpl", "click.kamil.test.BaseService");
assertThat(context.getImplementations().get("click.kamil.test.BaseService"))
.containsExactly("click.kamil.test.MyServiceImpl");
}
}

129
state_machine_exporter_kotlin/src/test/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinStateMachineExtractorActionGuardTest.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.AnalysisResult;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import static org.assertj.core.api.Assertions.assertThat;
public class KotlinStateMachineExtractorActionGuardTest {
@TempDir
Path tempDir;
@Test
public void testActionsGuardsTimers() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.statemachine.config.EnableStateMachine\n" +
"import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter\n" +
"import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyStateMachine : EnumStateMachineConfigurerAdapter<String, String>() {\n" +
" override fun configure(transitions: StateMachineTransitionConfigurer<String, String>) {\n" +
" transitions\n" +
" .withExternal()\n" +
" .source(\"S1\").target(\"S2\")\n" +
" .guard { true }\n" +
" .action { println(\"S1 to S2\") }\n" +
" .and()\n" +
" .withExternal()\n" +
" .source(\"S2\").target(\"S3\")\n" +
" .timer(1000)\n" +
" .guardExpression(\"true\")\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyStateMachine.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<AnalysisResult> results = KotlinStateMachineExtractor.extract(context, false);
assertThat(results).hasSize(1);
AnalysisResult result = results.get(0);
var transitions = result.getTransitions();
assertThat(transitions).hasSize(2);
var t1 = transitions.stream().filter(t -> t.getSourceStates().get(0).rawName().equals("S1")).findFirst().get();
assertThat(t1.getGuards()).hasSize(1);
assertThat(t1.getGuards().get(0).expression()).isEqualTo("{ true }");
assertThat(t1.getGuards().get(0).isLambda()).isTrue();
assertThat(t1.getActions()).hasSize(1);
assertThat(t1.getActions().get(0).expression()).isEqualTo("{ println(\"S1 to S2\") }");
assertThat(t1.getActions().get(0).isLambda()).isTrue();
var t2 = transitions.stream().filter(t -> t.getSourceStates().get(0).rawName().equals("S2")).findFirst().get();
assertThat(t2.getEvent().rawName()).isEqualTo("timer(1000)");
assertThat(t2.getGuards()).hasSize(1);
assertThat(t2.getGuards().get(0).expression()).isEqualTo("\"true\"");
}
@Test
public void testRichMetadataResolution() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.statemachine.config.EnableStateMachine\n" +
"import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter\n" +
"import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer\n" +
"import org.springframework.statemachine.guard.Guard\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyStateMachine : EnumStateMachineConfigurerAdapter<String, String>() {\n" +
" override fun configure(transitions: StateMachineTransitionConfigurer<String, String>) {\n" +
" transitions\n" +
" .withExternal()\n" +
" .source(\"S1\").target(\"S2\")\n" +
" .guard(myHelperGuard())\n" +
" .action(::myHelperAction)\n" +
" }\n" +
"\n" +
" fun myHelperGuard(): Guard<String, String> {\n" +
" return Guard { true }\n" +
" }\n" +
"\n" +
" fun myHelperAction(context: Any) {\n" +
" println(\"action executed\")\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyStateMachine.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<AnalysisResult> results = KotlinStateMachineExtractor.extract(context, false);
assertThat(results).hasSize(1);
AnalysisResult result = results.get(0);
var transitions = result.getTransitions();
assertThat(transitions).hasSize(1);
var t1 = transitions.get(0);
// Guard assertions
assertThat(t1.getGuards()).hasSize(1);
var guard = t1.getGuards().get(0);
assertThat(guard.expression()).isEqualTo("myHelperGuard()");
assertThat(guard.internalLogic()).contains("Guard { true }");
assertThat(guard.lineNumber()).isEqualTo(14);
assertThat(guard.className()).isEqualTo("click.kamil.test.MyStateMachine");
assertThat(guard.sourceFile()).isEqualTo("MyStateMachine.kt");
// Action assertions
assertThat(t1.getActions()).hasSize(1);
var action = t1.getActions().get(0);
assertThat(action.expression()).isEqualTo("::myHelperAction");
assertThat(action.internalLogic()).contains("println(\"action executed\")");
assertThat(action.lineNumber()).isEqualTo(15);
assertThat(action.className()).isEqualTo("click.kamil.test.MyStateMachine");
assertThat(action.sourceFile()).isEqualTo("MyStateMachine.kt");
}
}

73
state_machine_exporter_kotlin/src/test/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinStateMachineExtractorPseudoStatesTest.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.AnalysisResult;
import click.kamil.springstatemachineexporter.model.TransitionType;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import static org.assertj.core.api.Assertions.assertThat;
public class KotlinStateMachineExtractorPseudoStatesTest {
@TempDir
Path tempDir;
@Test
public void testPseudoStatesExtraction() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.statemachine.config.EnableStateMachine\n" +
"import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter\n" +
"import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyStateMachine : EnumStateMachineConfigurerAdapter<String, String>() {\n" +
" override fun configure(transitions: StateMachineTransitionConfigurer<String, String>) {\n" +
" transitions\n" +
" .withChoice()\n" +
" .source(\"S1\")\n" +
" .first(\"S2\", { true })\n" +
" .then(\"S3\", { false })\n" +
" .last(\"S4\")\n" +
" .and()\n" +
" .withFork()\n" +
" .source(\"S5\")\n" +
" .targets(\"S6\", \"S7\")\n" +
" .and()\n" +
" .withJoin()\n" +
" .sources(\"S8\", \"S9\")\n" +
" .target(\"S10\")\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyStateMachine.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<AnalysisResult> results = KotlinStateMachineExtractor.extract(context, false);
System.out.println("RESULTS: " + results);
assertThat(results).hasSize(1);
AnalysisResult result = results.get(0);
// Choice should create 3 transitions (first, then, last)
long choiceCount = result.getTransitions().stream().filter(t -> t.getType() == TransitionType.CHOICE).count();
assertThat(choiceCount).isEqualTo(3);
// Fork should create 1 transition with 1 source and 2 targets
var forkTransition = result.getTransitions().stream().filter(t -> t.getType() == TransitionType.FORK).findFirst().get();
assertThat(forkTransition.getSourceStates()).hasSize(1);
assertThat(forkTransition.getTargetStates()).hasSize(2);
// Join should create 1 transition with 2 sources and 1 target
var joinTransition = result.getTransitions().stream().filter(t -> t.getType() == TransitionType.JOIN).findFirst().get();
assertThat(joinTransition.getSourceStates()).hasSize(2);
assertThat(joinTransition.getTargetStates()).hasSize(1);
}
}

48
state_machine_exporter_kotlin/src/test/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinStateMachineExtractorSetOfTest.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.AnalysisResult;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import static org.assertj.core.api.Assertions.assertThat;
public class KotlinStateMachineExtractorSetOfTest {
@TempDir
Path tempDir;
@Test
public void testStatesWithSetOf() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.statemachine.config.EnableStateMachine\n" +
"import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter\n" +
"import org.springframework.statemachine.config.builders.StateMachineStateConfigurer\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyStateMachine : EnumStateMachineConfigurerAdapter<String, String>() {\n" +
" override fun configure(states: StateMachineStateConfigurer<String, String>) {\n" +
" states\n" +
" .withStates()\n" +
" .initial(\"S1\")\n" +
" .states(setOf(\"S2\", \"S3\"))\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyStateMachine.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<AnalysisResult> results = KotlinStateMachineExtractor.extract(context, false);
assertThat(results).hasSize(1);
AnalysisResult result = results.get(0);
assertThat(result.getStates()).extracting("rawName").contains("S1", "S2", "S3");
}
}

196
state_machine_exporter_kotlin/src/test/java/click/kamil/springstatemachineexporter/plugin/kotlin/KotlinStateMachineExtractorTest.java Normal file
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package click.kamil.springstatemachineexporter.plugin.kotlin;
import click.kamil.springstatemachineexporter.analysis.model.AnalysisResult;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import static org.assertj.core.api.Assertions.assertThat;
public class KotlinStateMachineExtractorTest {
@TempDir
Path tempDir;
@Test
public void testMultipleTransitionsWithAnd() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.statemachine.config.EnableStateMachine\n" +
"import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter\n" +
"import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyStateMachine : EnumStateMachineConfigurerAdapter<String, String>() {\n" +
" override fun configure(transitions: StateMachineTransitionConfigurer<String, String>) {\n" +
" transitions\n" +
" .withExternal()\n" +
" .source(\"S1\").target(\"S2\").event(\"E1\")\n" +
" .and()\n" +
" .withExternal()\n" +
" .source(\"S2\").target(\"S3\").event(\"E2\")\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyStateMachine.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<AnalysisResult> results = KotlinStateMachineExtractor.extract(context, false);
assertThat(results).hasSize(1);
AnalysisResult result = results.get(0);
assertThat(result.getTransitions()).hasSize(2);
}
@Test
public void testSplitVariableChains() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.statemachine.config.EnableStateMachine\n" +
"import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter\n" +
"import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyStateMachine : EnumStateMachineConfigurerAdapter<String, String>() {\n" +
" override fun configure(transitions: StateMachineTransitionConfigurer<String, String>) {\n" +
" val ext = transitions.withExternal()\n" +
" ext.source(\"S1\").target(\"S2\").event(\"E1\")\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyStateMachine.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<AnalysisResult> results = KotlinStateMachineExtractor.extract(context, false);
assertThat(results).hasSize(1);
AnalysisResult result = results.get(0);
assertThat(result.getTransitions()).hasSize(1);
var transition = result.getTransitions().get(0);
assertThat(transition.getSourceStates().get(0).rawName()).isEqualTo("S1");
assertThat(transition.getTargetStates().get(0).rawName()).isEqualTo("S2");
}
@Test
public void testChoiceOrdering() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.statemachine.config.EnableStateMachine\n" +
"import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter\n" +
"import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyStateMachine : EnumStateMachineConfigurerAdapter<String, String>() {\n" +
" override fun configure(transitions: StateMachineTransitionConfigurer<String, String>) {\n" +
" transitions.withChoice()\n" +
" .source(\"S1\")\n" +
" .first(\"S2\", { true })\n" +
" .then(\"S3\", { false })\n" +
" .last(\"S4\")\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyStateMachine.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<AnalysisResult> results = KotlinStateMachineExtractor.extract(context, false);
assertThat(results).hasSize(1);
AnalysisResult result = results.get(0);
assertThat(result.getTransitions()).hasSize(3);
assertThat(result.getTransitions().get(0).getTargetStates().get(0).rawName()).isEqualTo("S2");
assertThat(result.getTransitions().get(0).getOrder()).isEqualTo(0);
assertThat(result.getTransitions().get(1).getTargetStates().get(0).rawName()).isEqualTo("S3");
assertThat(result.getTransitions().get(1).getOrder()).isEqualTo(1);
assertThat(result.getTransitions().get(2).getTargetStates().get(0).rawName()).isEqualTo("S4");
assertThat(result.getTransitions().get(2).getOrder()).isEqualTo(2);
}
@Test
public void testNamedArguments() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.statemachine.config.EnableStateMachine\n" +
"import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter\n" +
"import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyStateMachine : EnumStateMachineConfigurerAdapter<String, String>() {\n" +
" override fun configure(transitions: StateMachineTransitionConfigurer<String, String>) {\n" +
" transitions.withChoice()\n" +
" .source(\"S1\")\n" +
" .first(guard = { true }, target = \"S2\")\n" +
" .last(target = \"S3\")\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyStateMachine.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<AnalysisResult> results = KotlinStateMachineExtractor.extract(context, false);
assertThat(results).hasSize(1);
AnalysisResult result = results.get(0);
assertThat(result.getTransitions()).hasSize(2);
assertThat(result.getTransitions().get(0).getTargetStates().get(0).rawName()).isEqualTo("S2");
assertThat(result.getTransitions().get(1).getTargetStates().get(0).rawName()).isEqualTo("S3");
}
@Test
public void testConstantResolution() throws IOException {
String code = "package click.kamil.test\n" +
"\n" +
"import org.springframework.statemachine.config.EnableStateMachine\n" +
"import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter\n" +
"import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer\n" +
"\n" +
"const val TOP_LEVEL_STATE = \"S3\"\n" +
"\n" +
"@EnableStateMachine\n" +
"class MyStateMachine : EnumStateMachineConfigurerAdapter<String, String>() {\n" +
" companion object {\n" +
" const val STATE_ONE = \"S1\"\n" +
" val STATE_TWO = \"S2\"\n" +
" }\n" +
"\n" +
" override fun configure(transitions: StateMachineTransitionConfigurer<String, String>) {\n" +
" transitions.withExternal()\n" +
" .source(STATE_ONE).target(STATE_TWO).event(\"E1\")\n" +
" .and()\n" +
" .withExternal()\n" +
" .source(STATE_TWO).target(TOP_LEVEL_STATE).event(\"E2\")\n" +
" }\n" +
"}\n";
Path ktFile = tempDir.resolve("MyStateMachine.kt");
Files.writeString(ktFile, code);
KotlinSourceContext context = new KotlinSourceContext(tempDir, Collections.emptyList());
List<AnalysisResult> results = KotlinStateMachineExtractor.extract(context, false);
assertThat(results).hasSize(1);
AnalysisResult result = results.get(0);
assertThat(result.getTransitions()).hasSize(2);
var t1 = result.getTransitions().get(0);
assertThat(t1.getSourceStates().get(0).rawName()).isEqualTo("S1");
assertThat(t1.getTargetStates().get(0).rawName()).isEqualTo("S2");
var t2 = result.getTransitions().get(1);
assertThat(t2.getSourceStates().get(0).rawName()).isEqualTo("S2");
assertThat(t2.getTargetStates().get(0).rawName()).isEqualTo("S3");
}
}

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state_machines/kotlin_simple_state_machine/build.gradle.kts Normal file
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plugins {
kotlin("jvm") version "1.9.22"
id("org.springframework.boot") version "3.2.3"
id("io.spring.dependency-management") version "1.1.4"
}
group = "click.kamil"
version = "1.0-SNAPSHOT"
repositories {
mavenCentral()
}
dependencies {
implementation("org.springframework.statemachine:spring-statemachine-core:3.2.1")
implementation("org.jetbrains.kotlin:kotlin-reflect")
}

37
state_machines/kotlin_simple_state_machine/src/main/kotlin/click/kamil/OrderStateMachine.kt Normal file
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package click.kamil
import org.springframework.statemachine.config.EnableStateMachine
import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter
import org.springframework.statemachine.config.builders.StateMachineStateConfigurer
import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer
enum class OrderState { NEW, PROCESSING, SHIPPED, COMPLETED }
enum class OrderEvent { PAY, SHIP, DELIVER }
@EnableStateMachine
class OrderStateMachine : EnumStateMachineConfigurerAdapter<OrderState, OrderEvent>() {
override fun configure(states: StateMachineStateConfigurer<OrderState, OrderEvent>) {
states
.withStates()
.initial(OrderState.NEW)
.states(setOf(OrderState.NEW, OrderState.PROCESSING, OrderState.SHIPPED, OrderState.COMPLETED))
}
override fun configure(transitions: StateMachineTransitionConfigurer<OrderState, OrderEvent>) {
transitions
.withExternal()
.source(OrderState.NEW).target(OrderState.PROCESSING)
.event(OrderEvent.PAY)
.action { println("Payment received") }
.and()
.withExternal()
.source(OrderState.PROCESSING).target(OrderState.SHIPPED)
.event(OrderEvent.SHIP)
.guard { true }
.and()
.withExternal()
.source(OrderState.SHIPPED).target(OrderState.COMPLETED)
.event(OrderEvent.DELIVER)
}
}