test1

state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/resolver/ConstantResolver.java

@@ -54,6 +54,30 @@ public class ConstantResolver {
             return resolveManual(sn, context, visited);
         }
 
+        if (expr instanceof MethodInvocation mi) {
+            IMethodBinding mb = mi.resolveMethodBinding();
+            if (mb != null) {
+                ITypeBinding returnType = mb.getReturnType();
+                if (returnType != null) {
+                    java.util.List<String> values = context.getEnumValues(returnType.getQualifiedName());
+                    if (values != null && !values.isEmpty()) {
+                        return "ENUM_SET:" + String.join(",", values);
+                    }
+                }
+            } else {
+                TypeDeclaration td = findEnclosingType(mi);
+                if (td != null) {
+                    MethodDeclaration md = context.findMethodDeclaration(td, mi.getName().getIdentifier(), true);
+                    if (md != null && md.getReturnType2() != null) {
+                        java.util.List<String> values = context.getEnumValues(md.getReturnType2().toString());
+                        if (values != null && !values.isEmpty()) {
+                            return "ENUM_SET:" + String.join(",", values);
+                        }
+                    }
+                }
+            }
+        }
+
         return null;
     }
 

state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/analysis/service/CallGraphBuilder.java

@@ -164,6 +164,20 @@ public class CallGraphBuilder {
                         for (String calledMethod : calledMethods) {
                             graph.computeIfAbsent(currentMethodFqn, k -> new ArrayList<>()).add(new CallEdge(calledMethod, args));
                         }
+                        for (Object argObj : node.arguments()) {
+                            if (argObj instanceof ExpressionMethodReference emr) {
+                                String typeName = emr.getExpression().toString();
+                                if ("this".equals(typeName) || "super".equals(typeName)) {
+                                    TypeDeclaration td = findEnclosingType(node);
+                                    if (td != null) {
+                                        String refMethod = resolveMethodInType(td, emr.getName().getIdentifier());
+                                        if (refMethod != null) {
+                                            graph.computeIfAbsent(currentMethodFqn, k -> new ArrayList<>()).add(new CallEdge(refMethod, args));
+                                        }
+                                    }
+                                }
+                            }
+                        }
                     }
                     return super.visit(node);
                 }
@@ -216,6 +230,21 @@ public class CallGraphBuilder {
                 }
             }
 
+            if (expr instanceof ExpressionMethodReference emr) {
+                TypeDeclaration td = findEnclosingType(expr);
+                if (td != null) {
+                    MethodDeclaration md = context.findMethodDeclaration(td, emr.getName().getIdentifier(), true);
+                    if (md != null && md.getBody() != null) {
+                        for (Object stmtObj : md.getBody().statements()) {
+                            if (stmtObj instanceof ReturnStatement rs && rs.getExpression() != null) {
+                                expr = rs.getExpression();
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+            
             // Extract from constructor args (e.g., new CustomMessage(OrderEvent.PROCESS, ...))
             expr = traceVariable(expr);
             if (expr instanceof ClassInstanceCreation cic) {

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

@@ -47,12 +47,14 @@ public class GenericEventDetector {
     }
 
     private void processSendEvent(MethodInvocation node, CompilationUnit cu, List<TriggerPoint> triggers) {
-        TriggerPoint trigger = buildTriggerPoint(node, cu, null);
-        if (trigger != null) {
+        List<TriggerPoint> builtTriggers = buildTriggerPoints(node, cu, null);
+        if (builtTriggers != null) {
+            for (TriggerPoint trigger : builtTriggers) {
                 log.debug("Successfully built trigger point: {}", trigger.getEvent());
                 triggers.add(trigger);
             }
         }
+    }
 
     private void processHints(MethodInvocation node, CompilationUnit cu, List<TriggerPoint> triggers) {
         if (hints == null || hints.isEmpty()) return;
@@ -62,14 +64,16 @@ public class GenericEventDetector {
 
         for (LibraryHint hint : hints) {
             if (calledMethod.equals(hint.getMethodFqn()) || isHintMatch(calledMethod, hint.getMethodFqn())) {
-                TriggerPoint trigger = buildTriggerPoint(node, cu, hint.getEvent());
-                if (trigger != null) {
+                List<TriggerPoint> builtTriggers = buildTriggerPoints(node, cu, hint.getEvent());
+                if (builtTriggers != null) {
+                    for (TriggerPoint trigger : builtTriggers) {
                         log.debug("Successfully built synthetic trigger point from hint: {}", trigger.getEvent());
                         triggers.add(trigger);
                     }
                 }
             }
         }
+    }
 
     private boolean isHintMatch(String called, String hintFqn) {
         return hintFqn.endsWith("." + called);
@@ -102,12 +106,12 @@ public class GenericEventDetector {
         return receiver.toString() + "." + methodName;
     }
 
-    private TriggerPoint buildTriggerPoint(MethodInvocation node, CompilationUnit cu, String forcedEvent) {
+    private List<TriggerPoint> buildTriggerPoints(MethodInvocation node, CompilationUnit cu, String forcedEvent) {
         String eventValue = null;
         if (forcedEvent != null) {
             eventValue = context.resolveString(forcedEvent);
         } else {
-            if (node.arguments().isEmpty()) return null;
+            if (node.arguments().isEmpty()) return Collections.emptyList();
             Expression eventExpr = (Expression) node.arguments().get(0);
             
             // Try MessageBuilder extraction first
@@ -123,18 +127,37 @@ public class GenericEventDetector {
         MethodDeclaration method = findEnclosingMethod(node);
         TypeDeclaration type = findEnclosingType(node);
 
-        if (type == null) return null;
+        if (type == null) return Collections.emptyList();
 
         String sourceState = extractSourceState(node);
         
-        return TriggerPoint.builder()
+        List<TriggerPoint> results = new ArrayList<>();
+        if (eventValue != null && eventValue.startsWith("ENUM_SET:")) {
+            String[] parts = eventValue.substring(9).split(",");
+            for (String part : parts) {
+                if (!part.trim().isEmpty()) {
+                    results.add(TriggerPoint.builder()
+                            .event(part.trim())
+                            .sourceState(sourceState)
+                            .className(context.getFqn(type))
+                            .methodName(method != null ? method.getName().getIdentifier() : "initializer")
+                            .sourceFile(context.getRelativePath(context.getFqn(type)))
+                            .lineNumber(cu.getLineNumber(node.getStartPosition()))
+                            .build());
+                }
+            }
+        } else {
+            results.add(TriggerPoint.builder()
                     .event(eventValue)
                     .sourceState(sourceState)
                     .className(context.getFqn(type))
                     .methodName(method != null ? method.getName().getIdentifier() : "initializer")
                     .sourceFile(context.getRelativePath(context.getFqn(type)))
                     .lineNumber(cu.getLineNumber(node.getStartPosition()))
-                .build();
+                    .build());
+        }
+
+        return results;
     }
 
     private String extractSourceState(ASTNode node) {

state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/ast/common/CodebaseContext.java

@@ -170,6 +170,7 @@ public class CodebaseContext {
     private final List<CompilationUnit> allCus = new ArrayList<>();
 
     private final Map<String, List<String>> interfaceToImpls = new HashMap<>();
+    private final Map<String, List<String>> enumValues = new HashMap<>();
 
     public void scan(Set<Path> rootDirs, Set<String> customIgnorePatterns) throws IOException {
         this.allProperties = propertyResolver.resolveAllProperties(rootDirs);
@@ -188,6 +189,8 @@ public class CodebaseContext {
             for (Object type : cu.types()) {
                 if (type instanceof TypeDeclaration td) {
                     indexType(td, packageName, javaFile);
+                } else if (type instanceof EnumDeclaration ed) {
+                    indexEnum(ed, packageName, javaFile);
                 }
             }
         }
@@ -248,6 +251,35 @@ public class CodebaseContext {
         return Collections.emptyList();
     }
 
+    private void indexEnum(EnumDeclaration ed, String parentFqn, Path javaFile) {
+        String simpleName = ed.getName().getIdentifier();
+        String fqn = parentFqn.isEmpty() ? simpleName : parentFqn + "." + simpleName;
+        
+        classes.put(fqn, (CompilationUnit) ed.getRoot());
+        classPaths.put(fqn, javaFile);
+        
+        List<String> values = new ArrayList<>();
+        for (Object o : ed.enumConstants()) {
+            if (o instanceof EnumConstantDeclaration ecd) {
+                values.add(fqn + "." + ecd.getName().getIdentifier());
+            }
+        }
+        enumValues.put(fqn, values);
+        if (!simpleNameToFqn.containsKey(simpleName)) {
+            simpleNameToFqn.put(simpleName, fqn);
+        }
+    }
+
+    public List<String> getEnumValues(String fqnOrSimpleName) {
+        if (fqnOrSimpleName == null) return null;
+        List<String> values = enumValues.get(fqnOrSimpleName);
+        if (values != null) return values;
+        String fqn = simpleNameToFqn.get(fqnOrSimpleName);
+        if (fqn != null) return enumValues.get(fqn);
+        // Also try stripping array or generic types if any (e.g. MyEnum[])
+        return null;
+    }
+
     public State resolveState(Expression expr, CompilationUnit cu) {
         if (expr == null)
             return null;

state_machine_exporter/src/main/java/click/kamil/springstatemachineexporter/exporter/PlantUml.java

@@ -124,9 +124,13 @@ public class PlantUml implements StateMachineExporter {
                         
                         sb.append(" : [[#").append(linkId).append(" ");
                         if (!label.isEmpty()) {
-                            sb.append(label);
+                            String sanitized = label.replace("[", "[")
+                                                  .replace("]", "]")
+                                                  .replace("<", "&lt;")
+                                                  .replace(">", "&gt;");
+                            sb.append(sanitized);
                         } else {
-                            sb.append("<U+00A0>");
+                            sb.append(".");
                         }
                         sb.append("]]");
                     } else if (!label.isEmpty()) {

state_machine_exporter/src/test/java/click/kamil/springstatemachineexporter/RegressionTest.java

@@ -137,6 +137,12 @@ public class RegressionTest {
                         root.resolve("state_machines/maven_multi_module/core-module"),
                         Path.of("src/test/resources/golden/MavenOrderStateMachine"),
                         "MavenOrderStateMachine"
+                ),
+                new TestScenario(
+                        "Complex Multi-Module Sample",
+                        root.resolve("state_machines/complex_multi_module_sm"),
+                        Path.of("src/test/resources/golden/StateMachineConfig"),
+                        "StateMachineConfig"
                 )
         );
     }

state_machine_exporter/src/test/java/click/kamil/springstatemachineexporter/analysis/service/GenericEventDetectorTest.java

@@ -44,4 +44,42 @@ public class GenericEventDetectorTest {
         assertThat(triggers.get(0).getEvent()).isEqualTo("myEvent");
         assertThat(triggers.get(0).getMethodName()).isEqualTo("a");
     }
+
+    @Test
+    void testEnumGetterUnionExtraction(@TempDir Path tempDir) throws IOException {
+        Path dir = tempDir.resolve("com/example");
+        Files.createDirectories(dir);
+        Files.writeString(dir.resolve("MyEnum.java"),
+            "package com.example;\n" +
+            "public enum MyEnum {\n" +
+            "    STATE_A, STATE_B;\n" +
+            "}\n");
+            
+        Files.writeString(dir.resolve("MyService.java"),
+            "package com.example;\n" +
+            "import org.springframework.statemachine.StateMachine;\n" +
+            "public class MyService {\n" +
+            "    private StateMachine<String, String> stateMachine;\n" +
+            "    public MyEnum getEvent() { return MyEnum.STATE_A; }\n" + // Pretend it returns the enum
+            "    public void trigger() {\n" +
+            "        stateMachine.sendEvent(this.getEvent());\n" +
+            "    }\n" +
+            "}\n");
+
+        CodebaseContext context = new CodebaseContext();
+        context.scan(tempDir);
+
+        GenericEventDetector detector = new GenericEventDetector(context, new ConstantResolver(), List.of());
+        
+        CompilationUnit serviceCu = context.getCompilationUnits().stream()
+                .filter(cu -> cu.getJavaElement() == null || cu.getJavaElement().getElementName().contains("MyService"))
+                .findFirst().orElseThrow();
+                
+        List<TriggerPoint> triggers = detector.detect(serviceCu);
+
+        System.out.println("TRIGGERS: " + triggers);
+        assertThat(triggers).hasSize(2);
+        assertThat(triggers).anyMatch(t -> t.getEvent().equals("com.example.MyEnum.STATE_A"));
+        assertThat(triggers).anyMatch(t -> t.getEvent().equals("com.example.MyEnum.STATE_B"));
+    }
 }

state_machine_exporter/src/test/java/click/kamil/springstatemachineexporter/exporter/PlantUmlTest.java

@@ -0,0 +1,55 @@
+package click.kamil.springstatemachineexporter.exporter;
+
+import click.kamil.springstatemachineexporter.model.State;
+import click.kamil.springstatemachineexporter.model.Transition;
+import click.kamil.springstatemachineexporter.model.TransitionType;
+import click.kamil.springstatemachineexporter.model.Guard;
+import click.kamil.springstatemachineexporter.model.Action;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class PlantUmlTest {
+
+    @Test
+    void testExportSanitizesLabels() {
+        PlantUml plantUml = new PlantUml();
+        ExportOptions options = ExportOptions.builder()
+                .embedIdentifiers(true)
+                .useLambdaGuards(false)
+                .build();
+
+        State state1 = State.of("State1");
+        State state2 = State.of("State2");
+
+        Transition t = new Transition();
+        t.setType(TransitionType.EXTERNAL);
+        t.setSourceStates(List.of(state1));
+        t.setTargetStates(List.of(state2));
+        
+        // Add a guard and action containing problematic characters
+        t.setGuard(Guard.of("list.size() < 5", false, null, null, null, null));
+        t.setActions(List.of(Action.of("doSomething(new int[]{1, 2})", false, null, null, null, null)));
+
+        String result = plantUml.export(
+                "TestMachine",
+                List.of(t),
+                Set.of("State1"),
+                Set.of("State2"),
+                options
+        );
+
+        // Verify that < and > are replaced with HTML entities
+        assertThat(result).doesNotContain("< 5");
+        assertThat(result).contains("&lt; 5");
+
+        // Verify that [ and ] are replaced with HTML entities inside the link
+        assertThat(result).doesNotContain("[list.size() &lt; 5]");
+        assertThat(result).doesNotContain("new int[]{1, 2}");
+        assertThat(result).contains("&#91;list.size() &lt; 5&#93;");
+        assertThat(result).contains("new int&#91;&#93;{1, 2}");
+    }
+}

state_machine_exporter/src/test/resources/golden/EnterpriseStateMachineConfig/EnterpriseStateMachineConfig.json

@@ -137,7 +137,7 @@
       "name" : "JMS: shipping.queue",
       "className" : "click.kamil.examples.enterprise.messaging.ShippingJmsListener",
       "methodName" : "onShippingReady",
-      "sourceFile" : null,
+      "sourceFile" : "src/main/java/click/kamil/examples/enterprise/messaging/ShippingJmsListener.java",
       "metadata" : {
         "protocol" : "JMS",
         "destination" : "shipping.queue"
@@ -152,7 +152,7 @@
       "name" : "RABBIT: returns.queue",
       "className" : "click.kamil.examples.enterprise.messaging.ReturnsRabbitListener",
       "methodName" : "onReturn",
-      "sourceFile" : null,
+      "sourceFile" : "src/main/java/click/kamil/examples/enterprise/messaging/ReturnsRabbitListener.java",
       "metadata" : {
         "protocol" : "RABBIT",
         "destination" : "returns.queue"
@@ -292,7 +292,7 @@
         "name" : "JMS: shipping.queue",
         "className" : "click.kamil.examples.enterprise.messaging.ShippingJmsListener",
         "methodName" : "onShippingReady",
-        "sourceFile" : null,
+        "sourceFile" : "src/main/java/click/kamil/examples/enterprise/messaging/ShippingJmsListener.java",
         "metadata" : {
           "protocol" : "JMS",
           "destination" : "shipping.queue"
@@ -326,7 +326,7 @@
         "name" : "RABBIT: returns.queue",
         "className" : "click.kamil.examples.enterprise.messaging.ReturnsRabbitListener",
         "methodName" : "onReturn",
-        "sourceFile" : null,
+        "sourceFile" : "src/main/java/click/kamil/examples/enterprise/messaging/ReturnsRabbitListener.java",
         "metadata" : {
           "protocol" : "RABBIT",
           "destination" : "returns.queue"

state_machine_exporter/src/test/resources/golden/MavenOrderStateMachine/MavenOrderStateMachine.json

@@ -66,7 +66,7 @@
       "name" : "JMS: order.queue",
       "className" : "click.kamil.maven.api.JmsOrderListener",
       "methodName" : "onMessage",
-      "sourceFile" : null,
+      "sourceFile" : "api-module/src/main/java/click/kamil/maven/api/JmsOrderListener.java",
       "metadata" : {
         "protocol" : "JMS",
         "destination" : "order.queue"

state_machine_exporter/src/test/resources/golden/StateMachineConfig/StateMachineConfig.dot

@@ -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 -> NEW;
+  COMPLETED [fillcolor=lightgray];
+  CANCELLED [fillcolor=lightgray];
+  NEW -> PROCESSING [label="OrderEvent.PROCESS", style="solid", color="black"];
+  PROCESSING -> COMPLETED [label="OrderEvent.COMPLETE", style="solid", color="black"];
+  NEW -> CANCELLED [label="OrderEvent.CANCEL", style="solid", color="black"];
+  PROCESSING -> CANCELLED [label="OrderEvent.CANCEL", style="solid", color="black"];
+}
+

state_machine_exporter/src/test/resources/golden/StateMachineConfig/StateMachineConfig.json

@@ -26,7 +26,7 @@
       "sourceModule" : null,
       "stateMachineId" : null,
       "sourceState" : null,
-      "lineNumber" : 69
+      "lineNumber" : 78
     } ],
     "entryPoints" : [ {
       "type" : "REST",
@@ -61,6 +61,17 @@
         "verb" : "POST"
       },
       "parameters" : [ ]
+    }, {
+      "type" : "REST",
+      "name" : "POST /api/orders/functional-complete",
+      "className" : "click.kamil.web.OrderController",
+      "methodName" : "functionalCompleteOrder",
+      "sourceFile" : "web/src/main/java/click/kamil/web/OrderController.java",
+      "metadata" : {
+        "path" : "/api/orders/functional-complete",
+        "verb" : "POST"
+      },
+      "parameters" : [ ]
     }, {
       "type" : "RABBIT",
       "name" : "RABBIT: order.custom.transition.queue",
@@ -201,6 +212,36 @@
         "targetState" : "OrderState.CANCELLED",
         "event" : "OrderEvent.CANCEL"
       } ]
+    }, {
+      "entryPoint" : {
+        "type" : "REST",
+        "name" : "POST /api/orders/functional-complete",
+        "className" : "click.kamil.web.OrderController",
+        "methodName" : "functionalCompleteOrder",
+        "sourceFile" : "web/src/main/java/click/kamil/web/OrderController.java",
+        "metadata" : {
+          "path" : "/api/orders/functional-complete",
+          "verb" : "POST"
+        },
+        "parameters" : [ ]
+      },
+      "methodChain" : [ "click.kamil.web.OrderController.functionalCompleteOrder", "click.kamil.web.OrderController.triggerTransitionFunction", "click.kamil.service.StateMachineServiceImpl.sendMessage" ],
+      "triggerPoint" : {
+        "event" : "OrderEvent.COMPLETE",
+        "className" : "click.kamil.service.StateMachineServiceImpl",
+        "methodName" : "sendMessage",
+        "sourceFile" : "service/src/main/java/click/kamil/service/StateMachineServiceImpl.java",
+        "sourceModule" : null,
+        "stateMachineId" : null,
+        "sourceState" : null,
+        "lineNumber" : 25
+      },
+      "contextMachineId" : null,
+      "matchedTransitions" : [ {
+        "sourceState" : "OrderState.PROCESSING",
+        "targetState" : "OrderState.COMPLETED",
+        "event" : "OrderEvent.COMPLETE"
+      } ]
     }, {
       "entryPoint" : {
         "type" : "RABBIT",
@@ -227,7 +268,7 @@
         "sourceModule" : null,
         "stateMachineId" : null,
         "sourceState" : null,
-        "lineNumber" : 69
+        "lineNumber" : 78
       },
       "contextMachineId" : null,
       "matchedTransitions" : [ {

state_machine_exporter/src/test/resources/golden/StateMachineConfig/StateMachineConfig.puml

@@ -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
+
+[*] --> OrderState.NEW
+
+
+OrderState.NEW -[#1E90FF,bold]-> OrderState.PROCESSING <<external>> : OrderEvent.PROCESS
+OrderState.PROCESSING -[#1E90FF,bold]-> OrderState.COMPLETED <<external>> : OrderEvent.COMPLETE
+OrderState.NEW -[#1E90FF,bold]-> OrderState.CANCELLED <<external>> : OrderEvent.CANCEL
+OrderState.PROCESSING -[#1E90FF,bold]-> OrderState.CANCELLED <<external>> : OrderEvent.CANCEL
+
+OrderState.COMPLETED --> [*]
+OrderState.CANCELLED --> [*]
+@enduml
+

state_machine_exporter/src/test/resources/golden/StateMachineConfig/StateMachineConfig.scxml.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0" initial="NEW">
+  <state id="NEW">
+    <transition target="PROCESSING" event="OrderEvent.PROCESS"/>
+    <transition target="CANCELLED" event="OrderEvent.CANCEL"/>
+  </state>
+  <state id="PROCESSING">
+    <transition target="COMPLETED" event="OrderEvent.COMPLETE"/>
+    <transition target="CANCELLED" event="OrderEvent.CANCEL"/>
+  </state>
+  <state id="COMPLETED">
+  </state>
+  <state id="CANCELLED">
+  </state>
+</scxml>
+

state_machines/complex_multi_module_sm/service/src/main/java/click/kamil/service/StateMachineService.java

@@ -14,6 +14,10 @@ public interface StateMachineService {
     // Quirky pattern 2: Generic Varargs
     <T extends IEvent> void sendEventsVarargs(T... events);
 
+    // Functional quirks: passing functions and method references
+    <T extends IEvent> void executeFunctionalTransition(java.util.function.Supplier<T> eventSupplier, 
+                                                        java.util.function.Function<T, Void> transitionAction);
+
     // Child class of Spring's GenericMessage with a generic payload
     <T extends click.kamil.domain.OrderEvent, P> void sendCustomMessage(click.kamil.domain.CustomStateMachineMessage<T, P> customMessage);
 

state_machines/complex_multi_module_sm/service/src/main/java/click/kamil/service/StateMachineServiceImpl.java

@@ -59,6 +59,15 @@ public class StateMachineServiceImpl implements StateMachineService {
         }
     }
 
+    @Override
+    public <T extends IEvent> void executeFunctionalTransition(java.util.function.Supplier<T> eventSupplier, 
+                                                               java.util.function.Function<T, Void> transitionAction) {
+        // Resolve the event from the getter / supplier function
+        T event = eventSupplier.get();
+        // Apply the transition via the provided function / method reference
+        transitionAction.apply(event);
+    }
+
     @Override
     public <T extends OrderEvent, P> void sendCustomMessage(click.kamil.domain.CustomStateMachineMessage<T, P> customMessage) {
         // Because CustomStateMachineMessage extends GenericMessage<T> and implements Message<T>,

state_machines/complex_multi_module_sm/web/src/main/java/click/kamil/web/OrderController.java

@@ -34,4 +34,27 @@ public class OrderController {
         stateMachineService.sendMessage(OrderEvent.CANCEL);
         return "Order cancel event sent";
     }
+
+    // --- Functional Quirks for Static Analysis ---
+
+    // A getter returning a specific ENUM constant
+    public OrderEvent getCompleteEvent() {
+        return OrderEvent.COMPLETE;
+    }
+
+    // A specific function that performs the transition
+    public Void triggerTransitionFunction(click.kamil.domain.IEvent event) {
+        stateMachineService.sendMessage(event);
+        return null;
+    }
+
+    @PostMapping("/functional-complete")
+    public String functionalCompleteOrder() {
+        // Pass the getter and the transition applier as method references
+        stateMachineService.executeFunctionalTransition(
+                this::getCompleteEvent, 
+                this::triggerTransitionFunction
+        );
+        return "Functional complete event triggered via method references";
+    }
 }