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event maching heuristic update

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This commit is contained in:
Kamil Patryk Kozakowski
2026-06-21 12:19:15 +02:00
parent e00f4dca81
commit 968601eefc
28 changed files with 1317 additions and 77 deletions
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5
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/enricher/matching/HeuristicEventMatchingEngine.java
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@@ -26,7 +26,10 @@ public class HeuristicEventMatchingEngine implements EventMatchingEngine {
if (pe.contains(".")) {
simplePe = pe.substring(pe.lastIndexOf('.') + 1);
}
if (simplePe.equals(smEventRaw) || simplePe.equals(smEvent)) {
String simplifiedPe = simplify(simplePe);
if (simplePe.equals(smEventRaw) || simplePe.equals(smEvent) ||
simplePe.equalsIgnoreCase(smEvent) || simplifiedPe.equalsIgnoreCase(smEvent)) {
hasPolyMatch = true;
break;
}

22
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/resolver/PolymorphicEventResolver.java Normal file
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@@ -0,0 +1,22 @@
package click.kamil.springstatemachineexporter.analysis.resolver;
import click.kamil.springstatemachineexporter.analysis.model.TriggerPoint;
import click.kamil.springstatemachineexporter.ast.common.CodebaseContext;
import java.util.List;
public interface PolymorphicEventResolver {
/**
* Attempts to resolve a dynamically passed event variable into a set of
* concrete polymorphic event names.
*
* @param triggerPoint The original trigger point to resolve.
* @param resolvedValue The current String expression (e.g., "event.getType()" or "event")
* @param path The call path trace leading up to this variable.
* @param context The codebase context for deep type resolution.
* @return The updated TriggerPoint with polymorphic events set, or the original if unable to resolve.
*/
TriggerPoint resolvePolymorphicEvents(TriggerPoint triggerPoint, String resolvedValue, List<String> path, CodebaseContext context);
}

4
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/service/GenericEventDetector.java
View File

@@ -325,6 +325,10 @@ public class GenericEventDetector {
}
}
if (expr instanceof ClassInstanceCreation cic) {
return cic.getType().toString();
}
if (!(expr instanceof MethodInvocation mi)) return null;
// Trace back chain: MessageBuilder.withPayload(event).setHeader(...).build()

165
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/service/HeuristicCallGraphEngine.java
View File

@@ -142,43 +142,85 @@ public class HeuristicCallGraphEngine implements CallGraphEngine {
}
List<String> polymorphicEvents = new ArrayList<>();
if (resolvedValue.matches(".*\\.[a-zA-Z0-9_]+\\(\\)")) {
int lastDot = resolvedValue.lastIndexOf('.');
int firstDot = resolvedValue.indexOf('.');
int openParen = resolvedValue.indexOf('(', lastDot);
if (lastDot > 0 && openParen > lastDot) {
String varName = resolvedValue.substring(0, firstDot);
if (varName.contains("(")) {
varName = null;
// Parse resolvedValue using JDT to robustly handle complex expressions
org.eclipse.jdt.core.dom.ASTParser exprParser = org.eclipse.jdt.core.dom.ASTParser.newParser(org.eclipse.jdt.core.dom.AST.getJLSLatest());
exprParser.setSource(resolvedValue.toCharArray());
exprParser.setKind(org.eclipse.jdt.core.dom.ASTParser.K_EXPRESSION);
org.eclipse.jdt.core.dom.ASTNode exprNode = exprParser.createAST(null);
String varName = null;
String methodName = null;
String declaredType = null;
String sourceMethod = null;
if (exprNode instanceof org.eclipse.jdt.core.dom.MethodInvocation mi) {
methodName = mi.getName().getIdentifier();
if (mi.getExpression() instanceof org.eclipse.jdt.core.dom.SimpleName sn) {
varName = sn.getIdentifier();
} else if (mi.getExpression() instanceof org.eclipse.jdt.core.dom.ParenthesizedExpression pe &&
pe.getExpression() instanceof org.eclipse.jdt.core.dom.CastExpression ce &&
ce.getExpression() instanceof org.eclipse.jdt.core.dom.SimpleName sn) {
varName = sn.getIdentifier();
declaredType = ce.getType().toString();
sourceMethod = "inline-cast";
} else if (mi.getExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
declaredType = click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType());
sourceMethod = "inline-instantiation";
} else {
// Fallback for complex chained expressions
String exprStr = mi.getExpression() != null ? mi.getExpression().toString() : "";
if (!exprStr.contains("(")) {
varName = exprStr;
}
String methodName = resolvedValue.substring(lastDot + 1, openParen);
String declaredType = null;
String sourceMethod = null;
if (varName != null) {
for (String methodFqn : path) {
declaredType = getVariableDeclaredType(methodFqn, varName);
if (declaredType != null) {
sourceMethod = methodFqn;
break;
}
}
} else {
String baseExpr = resolvedValue.substring(0, lastDot);
if (baseExpr.contains("new ")) {
int newIdx = baseExpr.indexOf("new ");
int openParenBase = baseExpr.indexOf('(', newIdx);
if (openParenBase > newIdx) {
declaredType = baseExpr.substring(newIdx + 4, openParenBase).trim();
if (declaredType.contains("<")) {
declaredType = declaredType.substring(0, declaredType.indexOf('<'));
}
sourceMethod = "inline-instantiation";
}
}
} else if (exprNode instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
declaredType = click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType());
sourceMethod = "inline-instantiation";
polymorphicEvents.add(declaredType); // Track the payload type as the event
} else if (exprNode instanceof org.eclipse.jdt.core.dom.ConditionalExpression cond) {
if (cond.getThenExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cicThen) {
polymorphicEvents.add(click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cicThen.getType()));
}
if (cond.getElseExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cicElse) {
polymorphicEvents.add(click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cicElse.getType()));
}
sourceMethod = "inline-ternary";
declaredType = polymorphicEvents.isEmpty() ? null : polymorphicEvents.get(0);
} else if (exprNode instanceof org.eclipse.jdt.core.dom.SimpleName sn) {
varName = sn.getIdentifier();
methodName = "VariableReference"; // We just want to trigger deep trace
} else if (exprNode instanceof org.eclipse.jdt.core.dom.ParenthesizedExpression pe &&
pe.getExpression() instanceof org.eclipse.jdt.core.dom.CastExpression ce &&
ce.getExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
declaredType = click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType());
sourceMethod = "inline-instantiation";
polymorphicEvents.add(declaredType);
} else if (exprNode instanceof org.eclipse.jdt.core.dom.CastExpression ce &&
ce.getExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
declaredType = click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType());
sourceMethod = "inline-instantiation";
polymorphicEvents.add(declaredType);
}
if (methodName != null) {
if (varName != null && declaredType == null) {
for (String methodFqn : path) {
declaredType = getVariableDeclaredType(methodFqn, varName);
if (declaredType != null) {
sourceMethod = methodFqn;
break;
}
}
// If it wasn't a variable, it might be a static method call (e.g., EventBuilder.buildEvent())
if (declaredType == null && varName.matches("^[A-Z].*")) {
org.eclipse.jdt.core.dom.TypeDeclaration staticTd = context.getTypeDeclaration(varName);
if (staticTd != null) {
declaredType = context.getFqn(staticTd);
sourceMethod = "static-call";
}
}
}
if (declaredType != null) {
System.out.println("DEEP TRACE: " + sourceMethod + " " + (varName != null ? varName : "inline") + " -> " + declaredType);
@@ -215,9 +257,6 @@ public class HeuristicCallGraphEngine implements CallGraphEngine {
}
}
}
}
// LAST RESORT FALLBACK: If AST deep trace failed to find a valid ALL_CAPS constant
// (e.g. it returned a field name like 'type', or nothing), we can scrape the resolvedValue string directly
// for string literals or enum-like constants.
boolean hasValidConstant = false;
@@ -259,7 +298,16 @@ public class HeuristicCallGraphEngine implements CallGraphEngine {
return !val.equals(val.toUpperCase()) || val.length() <= 2;
});
}
List<String> newPolyEvents = new ArrayList<>();
for (String pe : polymorphicEvents) {
List<String> resolved = resolveClassConstantReturns(pe, context, null);
if (resolved != null && !resolved.isEmpty()) {
newPolyEvents.addAll(resolved);
} else {
newPolyEvents.add(pe);
}
}
polymorphicEvents = newPolyEvents;
if (!resolvedValue.equals(event) || !polymorphicEvents.isEmpty()) {
return TriggerPoint.builder()
@@ -384,6 +432,10 @@ public class HeuristicCallGraphEngine implements CallGraphEngine {
} else {
constants.add(val);
}
} else if (retExpr instanceof org.eclipse.jdt.core.dom.ConditionalExpression ce) {
extractConstantsFromExpression(ce, constants);
} else if (retExpr instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
constants.add(click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType()));
} else if (retExpr instanceof QualifiedName qn) {
constants.add(qn.toString());
} else if (retExpr instanceof SimpleName sn) {
@@ -405,6 +457,43 @@ public class HeuristicCallGraphEngine implements CallGraphEngine {
return constants;
}
private List<String> resolveClassConstantReturns(String className, click.kamil.springstatemachineexporter.ast.common.CodebaseContext context, CompilationUnit contextCu) {
TypeDeclaration td = contextCu != null ? context.getTypeDeclaration(className, contextCu) : context.getTypeDeclaration(className);
if (td == null) td = context.getTypeDeclaration(className);
if (td == null) return null;
final List<String> resolvedConstants = new ArrayList<>();
for (MethodDeclaration md : td.getMethods()) {
if (md.getBody() != null) {
md.getBody().accept(new ASTVisitor() {
@Override
public boolean visit(ReturnStatement node) {
extractConstantsFromExpression(node.getExpression(), resolvedConstants);
return super.visit(node);
}
});
}
if (!resolvedConstants.isEmpty()) return resolvedConstants;
}
return null;
}
private void extractConstantsFromExpression(org.eclipse.jdt.core.dom.Expression expr, List<String> constants) {
System.out.println("EXTRACT CONST: " + (expr != null ? expr.getClass().getSimpleName() + " " + expr.toString() : "null"));
if (expr instanceof QualifiedName qn) {
constants.add(qn.toString());
} else if (expr instanceof org.eclipse.jdt.core.dom.StringLiteral sl) {
constants.add(sl.getLiteralValue());
} else if (expr instanceof org.eclipse.jdt.core.dom.ConditionalExpression ce) {
extractConstantsFromExpression(ce.getThenExpression(), constants);
extractConstantsFromExpression(ce.getElseExpression(), constants);
} else if (expr instanceof org.eclipse.jdt.core.dom.ParenthesizedExpression pe) {
extractConstantsFromExpression(pe.getExpression(), constants);
} else if (expr instanceof org.eclipse.jdt.core.dom.CastExpression ce) {
extractConstantsFromExpression(ce.getExpression(), constants);
}
}
private String traceLocalVariable(String methodFqn, String varName) {
if (methodFqn == null || !methodFqn.contains(".")) return null;
String className = methodFqn.substring(0, methodFqn.lastIndexOf('.'));

164
state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/service/JdtCallGraphEngine.java
View File

@@ -146,43 +146,85 @@ public class JdtCallGraphEngine implements CallGraphEngine {
}
List<String> polymorphicEvents = new ArrayList<>();
if (resolvedValue.matches(".*\\.[a-zA-Z0-9_]+\\(\\)")) {
int lastDot = resolvedValue.lastIndexOf('.');
int firstDot = resolvedValue.indexOf('.');
int openParen = resolvedValue.indexOf('(', lastDot);
if (lastDot > 0 && openParen > lastDot) {
String varName = resolvedValue.substring(0, firstDot);
if (varName.contains("(")) {
varName = null;
// Parse resolvedValue using JDT to robustly handle complex expressions
org.eclipse.jdt.core.dom.ASTParser exprParser = org.eclipse.jdt.core.dom.ASTParser.newParser(org.eclipse.jdt.core.dom.AST.getJLSLatest());
exprParser.setSource(resolvedValue.toCharArray());
exprParser.setKind(org.eclipse.jdt.core.dom.ASTParser.K_EXPRESSION);
org.eclipse.jdt.core.dom.ASTNode exprNode = exprParser.createAST(null);
String varName = null;
String methodName = null;
String declaredType = null;
String sourceMethod = null;
if (exprNode instanceof org.eclipse.jdt.core.dom.MethodInvocation mi) {
methodName = mi.getName().getIdentifier();
if (mi.getExpression() instanceof org.eclipse.jdt.core.dom.SimpleName sn) {
varName = sn.getIdentifier();
} else if (mi.getExpression() instanceof org.eclipse.jdt.core.dom.ParenthesizedExpression pe &&
pe.getExpression() instanceof org.eclipse.jdt.core.dom.CastExpression ce &&
ce.getExpression() instanceof org.eclipse.jdt.core.dom.SimpleName sn) {
varName = sn.getIdentifier();
declaredType = ce.getType().toString();
sourceMethod = "inline-cast";
} else if (mi.getExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
declaredType = click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType());
sourceMethod = "inline-instantiation";
} else {
// Fallback for complex chained expressions
String exprStr = mi.getExpression() != null ? mi.getExpression().toString() : "";
if (!exprStr.contains("(")) {
varName = exprStr;
}
String methodName = resolvedValue.substring(lastDot + 1, openParen);
String declaredType = null;
String sourceMethod = null;
if (varName != null) {
for (String methodFqn : path) {
declaredType = getVariableDeclaredType(methodFqn, varName);
if (declaredType != null) {
sourceMethod = methodFqn;
break;
}
}
} else {
String baseExpr = resolvedValue.substring(0, lastDot);
if (baseExpr.contains("new ")) {
int newIdx = baseExpr.indexOf("new ");
int openParenBase = baseExpr.indexOf('(', newIdx);
if (openParenBase > newIdx) {
declaredType = baseExpr.substring(newIdx + 4, openParenBase).trim();
if (declaredType.contains("<")) {
declaredType = declaredType.substring(0, declaredType.indexOf('<'));
}
sourceMethod = "inline-instantiation";
}
}
} else if (exprNode instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
declaredType = click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType());
sourceMethod = "inline-instantiation";
polymorphicEvents.add(declaredType); // Track the payload type as the event
} else if (exprNode instanceof org.eclipse.jdt.core.dom.ConditionalExpression cond) {
if (cond.getThenExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cicThen) {
polymorphicEvents.add(click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cicThen.getType()));
}
if (cond.getElseExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cicElse) {
polymorphicEvents.add(click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cicElse.getType()));
}
sourceMethod = "inline-ternary";
declaredType = polymorphicEvents.isEmpty() ? null : polymorphicEvents.get(0);
} else if (exprNode instanceof org.eclipse.jdt.core.dom.SimpleName sn) {
varName = sn.getIdentifier();
methodName = "VariableReference"; // We just want to trigger deep trace
} else if (exprNode instanceof org.eclipse.jdt.core.dom.ParenthesizedExpression pe &&
pe.getExpression() instanceof org.eclipse.jdt.core.dom.CastExpression ce &&
ce.getExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
declaredType = click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType());
sourceMethod = "inline-instantiation";
polymorphicEvents.add(declaredType);
} else if (exprNode instanceof org.eclipse.jdt.core.dom.CastExpression ce &&
ce.getExpression() instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
declaredType = click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType());
sourceMethod = "inline-instantiation";
polymorphicEvents.add(declaredType);
}
if (methodName != null) {
if (varName != null && declaredType == null) {
for (String methodFqn : path) {
declaredType = getVariableDeclaredType(methodFqn, varName);
if (declaredType != null) {
sourceMethod = methodFqn;
break;
}
}
// If it wasn't a variable, it might be a static method call (e.g., EventBuilder.buildEvent())
if (declaredType == null && varName.matches("^[A-Z].*")) {
org.eclipse.jdt.core.dom.TypeDeclaration staticTd = context.getTypeDeclaration(varName);
if (staticTd != null) {
declaredType = context.getFqn(staticTd);
sourceMethod = "static-call";
}
}
}
if (declaredType != null) {
System.out.println("DEEP TRACE: " + sourceMethod + " " + (varName != null ? varName : "inline") + " -> " + declaredType);
@@ -219,9 +261,6 @@ public class JdtCallGraphEngine implements CallGraphEngine {
}
}
}
}
// LAST RESORT FALLBACK: If AST deep trace failed to find a valid ALL_CAPS constant
// (e.g. it returned a field name like 'type', or nothing), we can scrape the resolvedValue string directly
// for string literals or enum-like constants.
boolean hasValidConstant = false;
@@ -263,7 +302,16 @@ public class JdtCallGraphEngine implements CallGraphEngine {
return !val.equals(val.toUpperCase()) || val.length() <= 2;
});
}
List<String> newPolyEvents = new ArrayList<>();
for (String pe : polymorphicEvents) {
List<String> resolved = resolveClassConstantReturns(pe, context, null);
if (resolved != null && !resolved.isEmpty()) {
newPolyEvents.addAll(resolved);
} else {
newPolyEvents.add(pe);
}
}
polymorphicEvents = newPolyEvents;
if (!resolvedValue.equals(event) || !polymorphicEvents.isEmpty()) {
return TriggerPoint.builder()
@@ -388,6 +436,10 @@ public class JdtCallGraphEngine implements CallGraphEngine {
} else {
constants.add(val);
}
} else if (retExpr instanceof org.eclipse.jdt.core.dom.ConditionalExpression ce) {
extractConstantsFromExpression(ce, constants);
} else if (retExpr instanceof org.eclipse.jdt.core.dom.ClassInstanceCreation cic) {
constants.add(click.kamil.springstatemachineexporter.ast.common.AstUtils.extractSimpleTypeName(cic.getType()));
} else if (retExpr instanceof QualifiedName qn) {
constants.add(qn.toString());
} else if (retExpr instanceof SimpleName sn) {
@@ -409,6 +461,42 @@ public class JdtCallGraphEngine implements CallGraphEngine {
return constants;
}
private List<String> resolveClassConstantReturns(String className, click.kamil.springstatemachineexporter.ast.common.CodebaseContext context, CompilationUnit contextCu) {
TypeDeclaration td = contextCu != null ? context.getTypeDeclaration(className, contextCu) : context.getTypeDeclaration(className);
if (td == null) td = context.getTypeDeclaration(className);
if (td == null) return null;
final List<String> resolvedConstants = new ArrayList<>();
for (MethodDeclaration md : td.getMethods()) {
if (md.getBody() != null) {
md.getBody().accept(new ASTVisitor() {
@Override
public boolean visit(ReturnStatement node) {
extractConstantsFromExpression(node.getExpression(), resolvedConstants);
return super.visit(node);
}
});
}
if (!resolvedConstants.isEmpty()) return resolvedConstants;
}
return null;
}
private void extractConstantsFromExpression(org.eclipse.jdt.core.dom.Expression expr, List<String> constants) {
if (expr instanceof QualifiedName qn) {
constants.add(qn.toString());
} else if (expr instanceof org.eclipse.jdt.core.dom.StringLiteral sl) {
constants.add(sl.getLiteralValue());
} else if (expr instanceof org.eclipse.jdt.core.dom.ConditionalExpression ce) {
extractConstantsFromExpression(ce.getThenExpression(), constants);
extractConstantsFromExpression(ce.getElseExpression(), constants);
} else if (expr instanceof org.eclipse.jdt.core.dom.ParenthesizedExpression pe) {
extractConstantsFromExpression(pe.getExpression(), constants);
} else if (expr instanceof org.eclipse.jdt.core.dom.CastExpression ce) {
extractConstantsFromExpression(ce.getExpression(), constants);
}
}
private String traceLocalVariable(String methodFqn, String varName) {
if (methodFqn == null || !methodFqn.contains(".")) return null;
String className = methodFqn.substring(0, methodFqn.lastIndexOf('.'));

6
state_machine_exporter/src/test/java/click/kamil/springstatemachineexporter/RegressionTest.java
View File

@@ -143,6 +143,12 @@ public class RegressionTest {
root.resolve("state_machines/complex_multi_module_sm"),
Path.of("src/test/resources/golden/StateMachineConfig"),
"StateMachineConfig"
),
new TestScenario(
"Polymorphic Events Sample",
root.resolve("state_machines/polymorphic_events_sample"),
Path.of("src/test/resources/golden/PolymorphicStateMachineConfiguration"),
"PolymorphicStateMachineConfiguration"
)
);
}

57
state_machine_exporter/src/test/java/click/kamil/springstatemachineexporter/analysis/service/HeuristicCallGraphEngineTest.java
View File

@@ -292,6 +292,63 @@ class HeuristicCallGraphEngineTest {
.containsExactlyInAnyOrder("OrderEvents.CANCELLED", "OrderEvents.RECEIVED");
}
@Test
void shouldResolveTernaryAndStringPolymorphicReturns() throws IOException {
String source = """
package com.example;
public class OrderController {
private OrderService service;
public void processOrderEvent() {
service.updateOrderState(new MysteryPayload().getType());
}
}
class OrderService {
public void updateOrderState(Object event) {
// sendEvent
}
}
class MysteryPayload {
public Object getType() {
int a = 5;
if (a > 10) {
return "RAW_STRING_EVENT";
}
return a > 5 ? OrderEvents.ABCD : OrderEvents.PAY;
}
}
enum OrderEvents { ABCD, PAY }
""";
Path tempDir = Files.createTempDirectory("callgraph_test_ternary_string");
Files.writeString(tempDir.resolve("OrderConfig.java"), source);
CodebaseContext context = new CodebaseContext();
context.scan(tempDir);
HeuristicCallGraphEngine builder = new HeuristicCallGraphEngine(context);
EntryPoint entryPoint = EntryPoint.builder()
.className("com.example.OrderController")
.methodName("processOrderEvent")
.build();
TriggerPoint trigger = TriggerPoint.builder()
.className("com.example.OrderService")
.methodName("updateOrderState")
.event("event")
.build();
List<CallChain> chains = builder.findChains(List.of(entryPoint), List.of(trigger));
assertThat(chains).hasSize(1);
CallChain chain = chains.get(0);
assertThat(chain.getTriggerPoint().getPolymorphicEvents())
.as("Resolved event was: " + chain.getTriggerPoint().getEvent())
.containsExactlyInAnyOrder("OrderEvents.ABCD", "OrderEvents.PAY", "RAW_STRING_EVENT");
}
@Test
void shouldUnwrapDeepMethodWrappers() throws IOException {
String source = """

15
state_machine_exporter/src/test/resources/golden/PolymorphicStateMachineConfiguration/PolymorphicStateMachineConfiguration.dot Normal file
View File

@@ -0,0 +1,15 @@
digraph statemachine {
rankdir=LR;
node [shape=rounded, style=filled, fillcolor=white, fontname="Arial"];
edge [fontname="Arial", fontsize=10];
_start [shape=circle, label="", fillcolor=black, width=0.1];
_start -> SUBMITTED;
CANCELED [fillcolor=lightgray];
FULFILLED [fillcolor=lightgray];
SUBMITTED -> PAID [label="OrderEvents.PAY", style="solid", color="black"];
PAID -> FULFILLED [label="OrderEvents.FULFILL", style="solid", color="black"];
SUBMITTED -> CANCELED [label="OrderEvents.CANCEL", style="solid", color="black"];
PAID -> CANCELED [label="OrderEvents.ABCD", style="solid", color="black"];
}

639
state_machine_exporter/src/test/resources/golden/PolymorphicStateMachineConfiguration/PolymorphicStateMachineConfiguration.json Normal file
View File

@@ -0,0 +1,639 @@
{
"metadata" : {
"triggers" : [ {
"event" : "event",
"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
"methodName" : "processEvent",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/OrderService.java",
"sourceModule" : null,
"stateMachineId" : null,
"sourceState" : null,
"lineNumber" : 13,
"polymorphicEvents" : null
}, {
"event" : "payload",
"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
"methodName" : "processPayloadEvent",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/OrderService.java",
"sourceModule" : null,
"stateMachineId" : null,
"sourceState" : null,
"lineNumber" : 17,
"polymorphicEvents" : null
}, {
"event" : "event",
"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
"methodName" : "processCustomEvent",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/OrderService.java",
"sourceModule" : null,
"stateMachineId" : null,
"sourceState" : null,
"lineNumber" : 21,
"polymorphicEvents" : null
} ],
"entryPoints" : [ {
"type" : "REST",
"name" : "POST /pay",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "pay",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay",
"verb" : "POST"
},
"parameters" : [ ]
}, {
"type" : "REST",
"name" : "POST /fulfill",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "fulfill",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/fulfill",
"verb" : "POST"
},
"parameters" : [ ]
}, {
"type" : "REST",
"name" : "POST /cancel",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "cancel",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/cancel",
"verb" : "POST"
},
"parameters" : [ ]
}, {
"type" : "REST",
"name" : "POST /payload-pay",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payloadPay",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/payload-pay",
"verb" : "POST"
},
"parameters" : [ ]
}, {
"type" : "REST",
"name" : "POST /pay-variable",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payVariable",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-variable",
"verb" : "POST"
},
"parameters" : [ ]
}, {
"type" : "REST",
"name" : "POST /pay-cast",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payCast",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-cast",
"verb" : "POST"
},
"parameters" : [ ]
}, {
"type" : "REST",
"name" : "POST /pay-ternary",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payTernary",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-ternary",
"verb" : "POST"
},
"parameters" : [ {
"name" : "isPay",
"type" : "boolean",
"annotations" : [ ]
} ]
}, {
"type" : "REST",
"name" : "POST /pay-list",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payList",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-list",
"verb" : "POST"
},
"parameters" : [ ]
}, {
"type" : "REST",
"name" : "POST /pay-builder-static",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payBuilderStatic",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-builder-static",
"verb" : "POST"
},
"parameters" : [ ]
}, {
"type" : "REST",
"name" : "POST /pay-builder-instance",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payBuilderInstance",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-builder-instance",
"verb" : "POST"
},
"parameters" : [ ]
}, {
"type" : "REST",
"name" : "POST /abcd",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "abcd",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/abcd",
"verb" : "POST"
},
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}, {
"type" : "REST",
"name" : "POST /mystery",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "mystery",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/mystery",
"verb" : "POST"
},
"parameters" : [ ]
} ],
"callChains" : [ {
"entryPoint" : {
"type" : "REST",
"name" : "POST /pay",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "pay",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay",
"verb" : "POST"
},
"parameters" : [ ]
},
"methodChain" : [ "click.kamil.examples.statemachine.polymorphic.PolymorphicController.pay", "click.kamil.examples.statemachine.polymorphic.OrderService.processEvent" ],
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"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
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"sourceModule" : null,
"stateMachineId" : null,
"sourceState" : null,
"lineNumber" : 13,
"polymorphicEvents" : [ "OrderEvents.PAY" ]
},
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"matchedTransitions" : [ {
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"targetState" : "OrderStates.PAID",
"event" : "OrderEvents.PAY"
} ]
}, {
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"name" : "POST /fulfill",
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"metadata" : {
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},
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},
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"matchedTransitions" : [ {
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"targetState" : "OrderStates.FULFILLED",
"event" : "OrderEvents.FULFILL"
} ]
}, {
"entryPoint" : {
"type" : "REST",
"name" : "POST /cancel",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
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"metadata" : {
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},
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},
"methodChain" : [ "click.kamil.examples.statemachine.polymorphic.PolymorphicController.cancel", "click.kamil.examples.statemachine.polymorphic.OrderService.processEvent" ],
"triggerPoint" : {
"event" : "new CancelEvent()",
"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
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"sourceModule" : null,
"stateMachineId" : null,
"sourceState" : null,
"lineNumber" : 13,
"polymorphicEvents" : [ "OrderEvents.CANCEL" ]
},
"contextMachineId" : null,
"matchedTransitions" : [ {
"sourceState" : "OrderStates.SUBMITTED",
"targetState" : "OrderStates.CANCELED",
"event" : "OrderEvents.CANCEL"
} ]
}, {
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"type" : "REST",
"name" : "POST /payload-pay",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
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"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
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},
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},
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"stateMachineId" : null,
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"polymorphicEvents" : [ "OrderEvents.PAY" ]
},
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"matchedTransitions" : [ {
"sourceState" : "OrderStates.SUBMITTED",
"targetState" : "OrderStates.PAID",
"event" : "OrderEvents.PAY"
} ]
}, {
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"type" : "REST",
"name" : "POST /pay-variable",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payVariable",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-variable",
"verb" : "POST"
},
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},
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"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
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"sourceModule" : null,
"stateMachineId" : null,
"sourceState" : null,
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"polymorphicEvents" : [ "OrderEvents.PAY" ]
},
"contextMachineId" : null,
"matchedTransitions" : [ {
"sourceState" : "OrderStates.SUBMITTED",
"targetState" : "OrderStates.PAID",
"event" : "OrderEvents.PAY"
} ]
}, {
"entryPoint" : {
"type" : "REST",
"name" : "POST /pay-cast",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payCast",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-cast",
"verb" : "POST"
},
"parameters" : [ ]
},
"methodChain" : [ "click.kamil.examples.statemachine.polymorphic.PolymorphicController.payCast", "click.kamil.examples.statemachine.polymorphic.OrderService.processEvent" ],
"triggerPoint" : {
"event" : "(BaseEvent)new PayEvent()",
"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
"methodName" : "processEvent",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/OrderService.java",
"sourceModule" : null,
"stateMachineId" : null,
"sourceState" : null,
"lineNumber" : 13,
"polymorphicEvents" : [ "OrderEvents.PAY" ]
},
"contextMachineId" : null,
"matchedTransitions" : [ {
"sourceState" : "OrderStates.SUBMITTED",
"targetState" : "OrderStates.PAID",
"event" : "OrderEvents.PAY"
} ]
}, {
"entryPoint" : {
"type" : "REST",
"name" : "POST /pay-ternary",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payTernary",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-ternary",
"verb" : "POST"
},
"parameters" : [ {
"name" : "isPay",
"type" : "boolean",
"annotations" : [ ]
} ]
},
"methodChain" : [ "click.kamil.examples.statemachine.polymorphic.PolymorphicController.payTernary", "click.kamil.examples.statemachine.polymorphic.OrderService.processEvent" ],
"triggerPoint" : {
"event" : "isPay ? new PayEvent() : new CancelEvent()",
"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
"methodName" : "processEvent",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/OrderService.java",
"sourceModule" : null,
"stateMachineId" : null,
"sourceState" : null,
"lineNumber" : 13,
"polymorphicEvents" : [ ]
},
"contextMachineId" : null,
"matchedTransitions" : null
}, {
"entryPoint" : {
"type" : "REST",
"name" : "POST /pay-list",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payList",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-list",
"verb" : "POST"
},
"parameters" : [ ]
},
"methodChain" : [ "click.kamil.examples.statemachine.polymorphic.PolymorphicController.payList", "click.kamil.examples.statemachine.polymorphic.OrderService.processEvent" ],
"triggerPoint" : {
"event" : "event",
"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
"methodName" : "processEvent",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/OrderService.java",
"sourceModule" : null,
"stateMachineId" : null,
"sourceState" : null,
"lineNumber" : 13,
"polymorphicEvents" : null
},
"contextMachineId" : null,
"matchedTransitions" : [ {
"sourceState" : "OrderStates.SUBMITTED",
"targetState" : "OrderStates.PAID",
"event" : "OrderEvents.PAY"
}, {
"sourceState" : "OrderStates.PAID",
"targetState" : "OrderStates.FULFILLED",
"event" : "OrderEvents.FULFILL"
}, {
"sourceState" : "OrderStates.SUBMITTED",
"targetState" : "OrderStates.CANCELED",
"event" : "OrderEvents.CANCEL"
}, {
"sourceState" : "OrderStates.PAID",
"targetState" : "OrderStates.CANCELED",
"event" : "OrderEvents.ABCD"
} ]
}, {
"entryPoint" : {
"type" : "REST",
"name" : "POST /pay-builder-static",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payBuilderStatic",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java",
"metadata" : {
"path" : "/pay-builder-static",
"verb" : "POST"
},
"parameters" : [ ]
},
"methodChain" : [ "click.kamil.examples.statemachine.polymorphic.PolymorphicController.payBuilderStatic", "click.kamil.examples.statemachine.polymorphic.OrderService.processEvent" ],
"triggerPoint" : {
"event" : "EventBuilder.buildEvent()",
"className" : "click.kamil.examples.statemachine.polymorphic.OrderService",
"methodName" : "processEvent",
"sourceFile" : "src/main/java/click/kamil/examples/statemachine/polymorphic/OrderService.java",
"sourceModule" : null,
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"polymorphicEvents" : [ "OrderEvents.FULFILL" ]
},
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"matchedTransitions" : [ {
"sourceState" : "OrderStates.PAID",
"targetState" : "OrderStates.FULFILLED",
"event" : "OrderEvents.FULFILL"
} ]
}, {
"entryPoint" : {
"type" : "REST",
"name" : "POST /pay-builder-instance",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "payBuilderInstance",
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},
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},
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},
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} ]
}, {
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"name" : "POST /abcd",
"className" : "click.kamil.examples.statemachine.polymorphic.PolymorphicController",
"methodName" : "abcd",
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"metadata" : {
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"verb" : "POST"
},
"parameters" : [ ]
},
"methodChain" : [ "click.kamil.examples.statemachine.polymorphic.PolymorphicController.abcd", "click.kamil.examples.statemachine.polymorphic.OrderService.processCustomEvent" ],
"triggerPoint" : {
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},
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} ]
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},
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"sourceModule" : null,
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"polymorphicEvents" : [ "OrderEvents.ABCD", "OrderEvents.PAY" ]
},
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"targetState" : "OrderStates.PAID",
"event" : "OrderEvents.PAY"
}, {
"sourceState" : "OrderStates.PAID",
"targetState" : "OrderStates.CANCELED",
"event" : "OrderEvents.ABCD"
} ]
} ],
"properties" : {
"default" : {
"spring.application.name" : "statemachinedemo"
}
}
},
"name" : "click.kamil.examples.statemachine.polymorphic.PolymorphicStateMachineConfiguration",
"renderChoicesAsDiamonds" : true,
"startStates" : [ "OrderStates.SUBMITTED" ],
"transitions" : [ {
"type" : "EXTERNAL",
"sourceStates" : [ {
"rawName" : "OrderStates.SUBMITTED",
"fullIdentifier" : "OrderStates.SUBMITTED"
} ],
"targetStates" : [ {
"rawName" : "OrderStates.PAID",
"fullIdentifier" : "OrderStates.PAID"
} ],
"event" : {
"rawName" : "OrderEvents.PAY",
"fullIdentifier" : "OrderEvents.PAY"
},
"guard" : null,
"actions" : [ ],
"order" : null
}, {
"type" : "EXTERNAL",
"sourceStates" : [ {
"rawName" : "OrderStates.PAID",
"fullIdentifier" : "OrderStates.PAID"
} ],
"targetStates" : [ {
"rawName" : "OrderStates.FULFILLED",
"fullIdentifier" : "OrderStates.FULFILLED"
} ],
"event" : {
"rawName" : "OrderEvents.FULFILL",
"fullIdentifier" : "OrderEvents.FULFILL"
},
"guard" : null,
"actions" : [ ],
"order" : null
}, {
"type" : "EXTERNAL",
"sourceStates" : [ {
"rawName" : "OrderStates.SUBMITTED",
"fullIdentifier" : "OrderStates.SUBMITTED"
} ],
"targetStates" : [ {
"rawName" : "OrderStates.CANCELED",
"fullIdentifier" : "OrderStates.CANCELED"
} ],
"event" : {
"rawName" : "OrderEvents.CANCEL",
"fullIdentifier" : "OrderEvents.CANCEL"
},
"guard" : null,
"actions" : [ ],
"order" : null
}, {
"type" : "EXTERNAL",
"sourceStates" : [ {
"rawName" : "OrderStates.PAID",
"fullIdentifier" : "OrderStates.PAID"
} ],
"targetStates" : [ {
"rawName" : "OrderStates.CANCELED",
"fullIdentifier" : "OrderStates.CANCELED"
} ],
"event" : {
"rawName" : "OrderEvents.ABCD",
"fullIdentifier" : "OrderEvents.ABCD"
},
"guard" : null,
"actions" : [ ],
"order" : null
} ],
"endStates" : [ "OrderStates.CANCELED", "OrderStates.FULFILLED" ]
}

35
state_machine_exporter/src/test/resources/golden/PolymorphicStateMachineConfiguration/PolymorphicStateMachineConfiguration.puml Normal file
View File

@@ -0,0 +1,35 @@
@startuml
!pragma layout smetana
set separator none
hide empty description
hide stereotype
skinparam state {
BackgroundColor white
BorderColor #94a3b8
BorderThickness 1
FontName Inter
FontSize 9
FontStyle bold
RoundCorner 20
Padding 1
}
skinparam shadowing false
skinparam ArrowFontName JetBrains Mono
skinparam ArrowFontSize 8
skinparam ArrowColor #cbd5e1
skinparam ArrowThickness 1
skinparam dpi 110
skinparam svgLinkTarget _self
[*] --> OrderStates.SUBMITTED
OrderStates.SUBMITTED -[#1E90FF,bold]-> OrderStates.PAID <<external>> : OrderEvents.PAY
OrderStates.PAID -[#1E90FF,bold]-> OrderStates.FULFILLED <<external>> : OrderEvents.FULFILL
OrderStates.SUBMITTED -[#1E90FF,bold]-> OrderStates.CANCELED <<external>> : OrderEvents.CANCEL
OrderStates.PAID -[#1E90FF,bold]-> OrderStates.CANCELED <<external>> : OrderEvents.ABCD
OrderStates.CANCELED --> [*]
OrderStates.FULFILLED --> [*]
@enduml

16
state_machine_exporter/src/test/resources/golden/PolymorphicStateMachineConfiguration/PolymorphicStateMachineConfiguration.scxml.xml Normal file
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@@ -0,0 +1,16 @@
<?xml version="1.0" encoding="UTF-8"?>
<scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0" initial="SUBMITTED">
<state id="SUBMITTED">
<transition target="PAID" event="OrderEvents.PAY"/>
<transition target="CANCELED" event="OrderEvents.CANCEL"/>
</state>
<state id="PAID">
<transition target="FULFILLED" event="OrderEvents.FULFILL"/>
<transition target="CANCELED" event="OrderEvents.ABCD"/>
</state>
<state id="FULFILLED">
</state>
<state id="CANCELED">
</state>
</scxml>

37
state_machines/polymorphic_events_sample/.gitignore vendored Normal file
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HELP.md
.gradle
build/
!gradle/wrapper/gradle-wrapper.jar
!**/src/main/**/build/
!**/src/test/**/build/
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
bin/
!**/src/main/**/bin/
!**/src/test/**/bin/
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
out/
!**/src/main/**/out/
!**/src/test/**/out/
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
### VS Code ###
.vscode/

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state_machines/polymorphic_events_sample/build.gradle Normal file
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plugins {
id 'java'
id 'org.springframework.boot' version '3.5.3'
id 'io.spring.dependency-management' version '1.1.7'
}
group = 'click.kamil'
version = '0.0.1-SNAPSHOT'
java {
toolchain {
languageVersion = JavaLanguageVersion.of(21)
}
}
repositories {
mavenCentral()
}
configurations {
compileOnly {
extendsFrom annotationProcessor
}
}
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter'
implementation 'org.springframework.statemachine:spring-statemachine-starter:3.2.0'
compileOnly 'org.projectlombok:lombok'
annotationProcessor 'org.projectlombok:lombok'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
}
tasks.named('test') {
useJUnitPlatform()
}
bootJar { enabled = false }
jar { enabled = true }

8
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/AbcdEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class AbcdEvent implements CustomCodeEventInterface {
@Override
public OrderEvents resolveEventCode() {
return OrderEvents.ABCD;
}
}

2
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/BaseEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public interface BaseEvent { OrderEvents getType(); }

4
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/CancelEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class CancelEvent implements BaseEvent {
@Override public OrderEvents getType() { return OrderEvents.CANCEL; }
}

5
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/CustomCodeEventInterface.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public interface CustomCodeEventInterface {
OrderEvents resolveEventCode();
}

11
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/EventBuilder.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class EventBuilder {
public static BaseEvent buildEvent() {
return new FulfillEvent();
}
public BaseEvent buildInstanceEvent() {
return new CancelEvent();
}
}

4
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/FulfillEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class FulfillEvent implements BaseEvent {
@Override public OrderEvents getType() { return OrderEvents.FULFILL; }
}

9
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/MysteryPayload.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class MysteryPayload implements CustomCodeEventInterface {
@Override
public OrderEvents resolveEventCode() {
int a = (int) (Math.random() * 10);
return a > 5 ? OrderEvents.ABCD : OrderEvents.PAY;
}
}

2
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/OrderEvents.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public enum OrderEvents { FULFILL, PAY, CANCEL, ABCD, NOPE, IGNORE }

23
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/OrderService.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
import org.springframework.statemachine.StateMachine;
import org.springframework.stereotype.Service;
import org.springframework.messaging.support.MessageBuilder;
@Service
public class OrderService {
private final StateMachine<OrderStates, OrderEvents> sm;
public OrderService(StateMachine<OrderStates, OrderEvents> sm) { this.sm = sm; }
public void processEvent(BaseEvent event) {
sm.sendEvent(event.getType());
}
public void processPayloadEvent(Object payload) {
sm.sendEvent(MessageBuilder.withPayload(payload).build());
}
public void processCustomEvent(CustomCodeEventInterface event) {
sm.sendEvent(event.resolveEventCode());
}
}

2
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/OrderStates.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public enum OrderStates { SUBMITTED, PAID, FULFILLED, CANCELED, PAID1, PAID2, PAID3, INVALID, HAPPEN, SKIPPED, NEVER }

4
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/PayEvent.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
public class PayEvent implements BaseEvent {
@Override public OrderEvents getType() { return OrderEvents.PAY; }
}

79
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicController.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class PolymorphicController {
private final OrderService orderService;
public PolymorphicController(OrderService orderService) {
this.orderService = orderService;
}
@PostMapping("/pay")
public void pay() {
orderService.processEvent(new PayEvent());
}
@PostMapping("/fulfill")
public void fulfill() {
orderService.processEvent(new FulfillEvent());
}
@PostMapping("/cancel")
public void cancel() {
orderService.processEvent(new CancelEvent());
}
@PostMapping("/payload-pay")
public void payloadPay() {
orderService.processPayloadEvent(new PayEvent());
}
@PostMapping("/pay-variable")
public void payVariable() {
PayEvent event = new PayEvent();
orderService.processEvent(event);
}
@PostMapping("/pay-cast")
public void payCast() {
orderService.processEvent((BaseEvent) new PayEvent());
}
@PostMapping("/pay-ternary")
public void payTernary(boolean isPay) {
orderService.processEvent(isPay ? new PayEvent() : new CancelEvent());
}
@PostMapping("/pay-list")
public void payList() {
java.util.List<BaseEvent> events = java.util.Arrays.asList(new PayEvent(), new FulfillEvent());
for (BaseEvent event : events) {
orderService.processEvent(event);
}
}
@PostMapping("/pay-builder-static")
public void payBuilderStatic() {
orderService.processEvent(EventBuilder.buildEvent());
}
@PostMapping("/pay-builder-instance")
public void payBuilderInstance() {
EventBuilder builder = new EventBuilder();
orderService.processEvent(builder.buildInstanceEvent());
}
@PostMapping("/abcd")
public void abcd() {
orderService.processCustomEvent(new AbcdEvent());
}
@PostMapping("/mystery")
public void mystery() {
orderService.processCustomEvent(new MysteryPayload());
}
}

23
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/PolymorphicStateMachineConfiguration.java Normal file
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package click.kamil.examples.statemachine.polymorphic;
import org.springframework.context.annotation.Configuration;
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;
@Configuration
@EnableStateMachine
public class PolymorphicStateMachineConfiguration extends EnumStateMachineConfigurerAdapter<OrderStates, OrderEvents> {
@Override
public void configure(StateMachineStateConfigurer<OrderStates, OrderEvents> states) throws Exception {
states.withStates().initial(OrderStates.SUBMITTED).state(OrderStates.PAID).state(OrderStates.FULFILLED).state(OrderStates.CANCELED);
}
@Override
public void configure(StateMachineTransitionConfigurer<OrderStates, OrderEvents> transitions) throws Exception {
transitions
.withExternal().source(OrderStates.SUBMITTED).target(OrderStates.PAID).event(OrderEvents.PAY).and()
.withExternal().source(OrderStates.PAID).target(OrderStates.FULFILLED).event(OrderEvents.FULFILL).and()
.withExternal().source(OrderStates.SUBMITTED).target(OrderStates.CANCELED).event(OrderEvents.CANCEL).and()
.withExternal().source(OrderStates.PAID).target(OrderStates.CANCELED).event(OrderEvents.ABCD);
}
}

7
state_machines/polymorphic_events_sample/src/main/java/click/kamil/examples/statemachine/polymorphic/app/StateMachineApplication.java Normal file
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package click.kamil.examples.statemachine.polymorphic.app;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class StateMachineApplication {
public static void main(String[] args) { SpringApplication.run(StateMachineApplication.class, args); }
}

1
state_machines/polymorphic_events_sample/src/main/resources/application.properties Normal file
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spring.application.name=statemachinedemo