Mostly fruitless work on making delegate work in eclipse.

2 files changed, 234 insertions, 0 deletions

diff --git a/src/eclipseAgent/lombok/eclipse/agent/EclipsePatcher.java b/src/eclipseAgent/lombok/eclipse/agent/EclipsePatcher.java
index 399ea357..c54ef604 100644
--- a/src/eclipseAgent/lombok/eclipse/agent/EclipsePatcher.java
+++ b/src/eclipseAgent/lombok/eclipse/agent/EclipsePatcher.java
@@ -257,9 +257,20 @@ public class EclipsePatcher extends Agent {
 	}
 	
 	private static void patchEcjTransformers(ScriptManager sm, boolean ecj) {
+		patchDelegate(sm);
 		patchHandleVal(sm, ecj);
 	}
 	
+	private static void patchDelegate(ScriptManager sm) {
+		final String TYPEDECLARATION_SIG = "org.eclipse.jdt.internal.compiler.ast.TypeDeclaration";
+		
+		sm.addScript(ScriptBuilder.exitEarly()
+				.target(new MethodTarget(TYPEDECLARATION_SIG, "resolve", "void"))
+				.request(StackRequest.THIS)
+				.decisionMethod(new Hook("lombok.eclipse.agent.PatchFixes", "handleDelegateForType", "boolean", TYPEDECLARATION_SIG))
+				.build());
+	}
+	
 	// Creates a copy of the 'initialization' field on a LocalDeclaration if the type of the LocalDeclaration is 'val', because the completion parser will null this out,
 	// which in turn stops us from inferring the intended type for 'val x = 5;'. We look at the copy.
 	// Also patches local declaration to not call .resolveType() on the initializer expression if we've already done so (calling it twice causes weird errors),
diff --git a/src/eclipseAgent/lombok/eclipse/agent/PatchFixes.java b/src/eclipseAgent/lombok/eclipse/agent/PatchFixes.java
index e2a52929..e71caa3d 100644
--- a/src/eclipseAgent/lombok/eclipse/agent/PatchFixes.java
+++ b/src/eclipseAgent/lombok/eclipse/agent/PatchFixes.java
@@ -22,33 +22,60 @@
 
 package lombok.eclipse.agent;
 
+import static lombok.eclipse.Eclipse.*;
+
 import java.io.BufferedOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.lang.reflect.Field;
+import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.List;
 
 import lombok.core.DiagnosticsReceiver;
 import lombok.core.PostCompiler;
+import lombok.core.AST.Kind;
 import lombok.eclipse.Eclipse;
+import lombok.eclipse.EclipseNode;
+import lombok.eclipse.handlers.EclipseHandlerUtil;
 
 import org.eclipse.jdt.core.IMethod;
 import org.eclipse.jdt.core.dom.SimpleName;
+import org.eclipse.jdt.internal.compiler.CompilationResult;
 import org.eclipse.jdt.internal.compiler.ast.ASTNode;
+import org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.AbstractVariableDeclaration;
+import org.eclipse.jdt.internal.compiler.ast.Annotation;
+import org.eclipse.jdt.internal.compiler.ast.Argument;
+import org.eclipse.jdt.internal.compiler.ast.ArrayInitializer;
+import org.eclipse.jdt.internal.compiler.ast.ClassLiteralAccess;
+import org.eclipse.jdt.internal.compiler.ast.Clinit;
+import org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.Expression;
+import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
+import org.eclipse.jdt.internal.compiler.ast.FieldReference;
 import org.eclipse.jdt.internal.compiler.ast.ForeachStatement;
 import org.eclipse.jdt.internal.compiler.ast.LocalDeclaration;
+import org.eclipse.jdt.internal.compiler.ast.MemberValuePair;
+import org.eclipse.jdt.internal.compiler.ast.MessageSend;
+import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.QualifiedTypeReference;
+import org.eclipse.jdt.internal.compiler.ast.ReturnStatement;
+import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
 import org.eclipse.jdt.internal.compiler.ast.SingleTypeReference;
+import org.eclipse.jdt.internal.compiler.ast.Statement;
+import org.eclipse.jdt.internal.compiler.ast.ThisReference;
+import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.TypeReference;
 import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
 import org.eclipse.jdt.internal.compiler.lookup.ArrayBinding;
 import org.eclipse.jdt.internal.compiler.lookup.Binding;
 import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
+import org.eclipse.jdt.internal.compiler.lookup.MethodBinding;
+import org.eclipse.jdt.internal.compiler.lookup.MethodScope;
 import org.eclipse.jdt.internal.compiler.lookup.ParameterizedTypeBinding;
 import org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding;
+import org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding;
 import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
 import org.eclipse.jdt.internal.compiler.lookup.TypeConstants;
 import org.eclipse.jdt.internal.compiler.lookup.TypeIds;
@@ -319,4 +346,200 @@ public class PatchFixes {
 		if (decl != null && LocalDeclaration.class.equals(decl.getClass()) && expr.resolvedType != null) return expr.resolvedType;
 		return expr.resolveType(scope);
 	}
+	
+	public static boolean handleDelegateForType(TypeDeclaration decl) {
+		if (decl.scope == null) return false;
+		if (decl.fields == null) return false;
+		
+		for (FieldDeclaration field : decl.fields) {
+			if (field.annotations == null) continue;
+			for (Annotation ann : field.annotations) {
+				if (ann.type == null) continue;
+				TypeBinding tb = ann.type.resolveType(decl.initializerScope);
+				if (!charArrayEquals("lombok", tb.qualifiedPackageName())) continue;
+				if (!charArrayEquals("Delegate", tb.qualifiedSourceName())) continue;
+				
+				List<ClassLiteralAccess> rawTypes = new ArrayList<ClassLiteralAccess>();
+				for (MemberValuePair pair : ann.memberValuePairs()) {
+					if (pair.name == null || charArrayEquals("value", pair.name)) {
+						if (pair.value instanceof ArrayInitializer) {
+							for (Expression expr : ((ArrayInitializer)pair.value).expressions) {
+								if (expr instanceof ClassLiteralAccess) rawTypes.add((ClassLiteralAccess) expr);
+							}
+						}
+						if (pair.value instanceof ClassLiteralAccess) {
+							rawTypes.add((ClassLiteralAccess) pair.value);
+						}
+					}
+				}
+				
+				List<MethodBinding> methodsToDelegate = new ArrayList<MethodBinding>();
+				
+				if (rawTypes.isEmpty()) {
+					addAllMethodBindings(methodsToDelegate, field.type.resolveType(decl.initializerScope));
+				} else {
+					for (ClassLiteralAccess cla : rawTypes) {
+						addAllMethodBindings(methodsToDelegate, cla.type.resolveType(decl.initializerScope));
+					}
+				}
+				
+				System.out.println("About to generate the following methods, all delegating to: this." + new String(field.name));
+				for (MethodBinding mb : methodsToDelegate) {
+					System.out.println(mb);
+				}
+				System.out.println("-----------");
+				
+				generateDelegateMethods(decl, methodsToDelegate, field.name, ann);
+			}
+		}
+		
+		return false;
+	}
+	
+	private static final Method methodScopeCreateMethodMethod;
+	private static final Field sourceTypeBindingMethodsField;
+	
+	static {
+		Method m = null;
+		Field f = null;
+		Exception ex = null;
+		
+		try {
+			m = MethodScope.class.getDeclaredMethod("createMethod", AbstractMethodDeclaration.class);
+			m.setAccessible(true);
+			f = SourceTypeBinding.class.getDeclaredField("methods");
+			f.setAccessible(true);
+		} catch (Exception e) {
+			ex = e;
+		}
+		
+		methodScopeCreateMethodMethod = m;
+		sourceTypeBindingMethodsField = f;
+		if (ex != null) throw new RuntimeException(ex);
+	}
+	
+	private static void generateDelegateMethods(TypeDeclaration type, List<MethodBinding> methods, char[] delegate, ASTNode source) {
+		for (MethodBinding binding : methods) {
+			MethodDeclaration method = generateDelegateMethod(delegate, binding, type.compilationResult, source);
+			if (type.methods == null) {
+				type.methods = new AbstractMethodDeclaration[1];
+				type.methods[0] = method;
+			} else {
+				int insertionPoint;
+				for (insertionPoint = 0; insertionPoint < type.methods.length; insertionPoint++) {
+					AbstractMethodDeclaration current = type.methods[insertionPoint];
+					if (current instanceof Clinit) continue;
+					if (Eclipse.isGenerated(current)) continue;
+					break;
+				}
+				AbstractMethodDeclaration[] newArray = new AbstractMethodDeclaration[type.methods.length + 1];
+				System.arraycopy(type.methods, 0, newArray, 0, insertionPoint);
+				if (insertionPoint <= type.methods.length) {
+					System.arraycopy(type.methods, insertionPoint, newArray, insertionPoint + 1, type.methods.length - insertionPoint);
+				}
+				
+				newArray[insertionPoint] = method;
+				type.methods = newArray;
+				MethodScope methodScope = new MethodScope(type.scope, method, false);
+				
+				try {
+					MethodBinding methodBinding = (MethodBinding) methodScopeCreateMethodMethod.invoke(methodScope, method);
+					System.out.println("SCOPE NOW: " + method.scope);
+					
+					method.resolve(type.scope);
+					System.out.println("Bind now: " + methodBinding.returnType);
+					
+					MethodBinding[] existing = (MethodBinding[]) sourceTypeBindingMethodsField.get(type.binding);
+					if (existing == null) existing = new MethodBinding[] {methodBinding};
+					else {
+						MethodBinding[] copy = new MethodBinding[existing.length + 1];
+						System.arraycopy(existing, 0, copy, 0, existing.length);
+						copy[existing.length] = methodBinding;
+					}
+					sourceTypeBindingMethodsField.set(type.binding, existing);
+					System.out.println("Added method binding: " + methodBinding);
+					System.out.println(method);
+				} catch (Exception e) {
+					throw new RuntimeException(e);
+				}
+			}
+		}
+	}
+	
+	private static MethodDeclaration generateDelegateMethod(char[] name, MethodBinding binding, CompilationResult compilationResult, ASTNode source) {
+		MethodDeclaration method = new MethodDeclaration(compilationResult);
+		Eclipse.setGeneratedBy(method, source);
+		method.modifiers = ClassFileConstants.AccPublic;
+		method.returnType = Eclipse.makeType(binding.returnType, source, false);
+		method.annotations = EclipseHandlerUtil.createSuppressWarningsAll(source, null);
+		if (binding.parameters != null && binding.parameters.length > 0) {
+			method.arguments = new Argument[binding.parameters.length];
+			for (int i = 0; i < method.arguments.length; i++) {
+				String argName = "$p" + i;
+				method.arguments[i] = new Argument(
+						argName.toCharArray(), pos(source),
+						Eclipse.makeType(binding.parameters[i], source, false),
+						ClassFileConstants.AccFinal);
+			}
+		}
+		method.selector = binding.selector;
+		if (binding.thrownExceptions != null && binding.thrownExceptions.length > 0) {
+			method.thrownExceptions = new TypeReference[binding.thrownExceptions.length];
+			for (int i = 0; i < method.thrownExceptions.length; i++) {
+				method.thrownExceptions[i] = Eclipse.makeType(binding.thrownExceptions[i], source, false);
+			}
+		}
+		
+		method.typeParameters = null; // TODO think about this
+		method.bits |= ECLIPSE_DO_NOT_TOUCH_FLAG;
+		FieldReference fieldRef = new FieldReference(name, pos(source));
+		fieldRef.receiver = new ThisReference(source.sourceStart, source.sourceEnd);
+		MessageSend call = new MessageSend();
+		call.receiver = fieldRef;
+		call.selector = binding.selector;
+		if (method.arguments != null) {
+			call.arguments = new Expression[method.arguments.length];
+			for (int i = 0; i < method.arguments.length; i++) {
+				call.arguments[i] = new SingleNameReference(("$p" + i).toCharArray(), pos(source));
+			}
+		}
+		
+		Statement body;
+		if (method.returnType instanceof SingleTypeReference && ((SingleTypeReference)method.returnType).token == TypeConstants.VOID) {
+			body = call;
+		} else {
+			body = new ReturnStatement(call, source.sourceStart, source.sourceEnd);
+		}
+		
+		method.statements = new Statement[] {body};
+		// TODO add Eclipse.setGeneratedBy everywhere.
+		method.bodyStart = method.declarationSourceStart = method.sourceStart = source.sourceStart;
+		method.bodyEnd = method.declarationSourceEnd = method.sourceEnd = source.sourceEnd;
+		return method;
+	}
+	
+	private static void addAllMethodBindings(List<MethodBinding> list, TypeBinding binding) {
+		if (binding instanceof ReferenceBinding) {
+			for (MethodBinding mb : ((ReferenceBinding)binding).availableMethods()) {
+				if (mb.isStatic()) continue;
+				if (mb.isBridge()) continue;
+				if (mb.isConstructor()) continue;
+				if (mb.isDefaultAbstract()) continue;
+				if (!mb.isPublic()) continue;
+				if (mb.isSynthetic()) continue;
+				list.add(mb);
+			}
+		}
+	}
+	
+	private static boolean charArrayEquals(String s, char[] c) {
+		if (s == null) return c == null;
+		if (c == null) return false;
+		
+		if (s.length() != c.length) return false;
+		for (int i = 0; i < s.length(); i++) if (s.charAt(i) != c[i]) return false;
+		return true;
+		
+		
+	}
 }