From bb11d24101fb238df4b170d4076daeb40ed54e86 Mon Sep 17 00:00:00 2001
From: Daniel Holle <dholle@hb.dhbw-stuttgart.de>
Date: Mon, 11 Nov 2024 15:47:38 +0100
Subject: [PATCH] First implementation of generating a bridge method

---
 .../target/generate/ASTToTargetAST.java       | 33 +++++++++++++++++++
 .../target/tree/TargetMethod.java             |  4 +++
 2 files changed, 37 insertions(+)

diff --git a/src/main/java/de/dhbwstuttgart/target/generate/ASTToTargetAST.java b/src/main/java/de/dhbwstuttgart/target/generate/ASTToTargetAST.java
index 6bbe7969..8b515c93 100644
--- a/src/main/java/de/dhbwstuttgart/target/generate/ASTToTargetAST.java
+++ b/src/main/java/de/dhbwstuttgart/target/generate/ASTToTargetAST.java
@@ -332,6 +332,39 @@ public class ASTToTargetAST {
         }
 
         // Generate dispatch method
+        var firstParam = firstMethod.signature().parameters().get(0);
+        var cases = new ArrayList<TargetSwitch.Case>();
+        TargetExpression expr = new TargetLocalVar(firstParam.pattern().type(), firstParam.pattern().name());
+
+        var classType = new TargetRefType(clazz.getClassName().getClassName());
+
+        for (var method : res) {
+            TargetExpression caseBody = new TargetMethodCall(
+                method.signature().returnType(),
+                new TargetThis(classType),
+                List.of(expr),
+                classType,
+                method.name(),
+                false, false, method.isPrivate()
+            );
+
+            if (method.signature().returnType() != null) {
+                caseBody = new TargetReturn(caseBody);
+            }
+            var body = new TargetBlock(List.of(caseBody));
+            var case_ = new TargetSwitch.Case(List.of(method.signature().parameters().getFirst().pattern()), body);
+
+            cases.add(case_);
+        }
+
+        var stmt = new TargetSwitch(expr, cases, null);
+        var block = new TargetBlock(List.of(stmt));
+
+        var parameters = List.of(new MethodParameter(firstParam.pattern().type(), firstParam.pattern().name()));
+        var signature = new TargetMethod.Signature(firstMethod.signature().generics(), parameters, firstMethod.signature().returnType());
+        var bridgeMethod = new TargetMethod(firstMethod.access(), firstMethod.name(), block, signature, firstMethod.txSignature());
+
+        res.add(bridgeMethod);
         return res;
     }
 
diff --git a/src/main/java/de/dhbwstuttgart/target/tree/TargetMethod.java b/src/main/java/de/dhbwstuttgart/target/tree/TargetMethod.java
index 2f3a689b..abc00083 100644
--- a/src/main/java/de/dhbwstuttgart/target/tree/TargetMethod.java
+++ b/src/main/java/de/dhbwstuttgart/target/tree/TargetMethod.java
@@ -79,6 +79,10 @@ public record TargetMethod(int access, String name, TargetBlock block, Signature
         return (access & Opcodes.ACC_STATIC) != 0;
     }
 
+    public boolean isPrivate() {
+        return (access & Opcodes.ACC_PRIVATE) != 0;
+    }
+
     @Override
     public boolean equals(Object other) {
         if (!(other instanceof TargetMethod otherMethod)) return false;