Implement JavacAnnotationBinding.getKey

Closes eclipse-jdt#218

Signed-off-by: David Thompson <davthomp@redhat.com>

org.eclipse.jdt.core.javac/src/org/eclipse/jdt/internal/javac/dom/JavacAnnotationBinding.java

@@ -23,12 +23,16 @@
 
 public class JavacAnnotationBinding implements IAnnotationBinding {
 
-	private JavacBindingResolver resolver;
-	private Compound annotation;
+	private final JavacBindingResolver resolver;
+	private final Compound annotation;
 
-	public JavacAnnotationBinding(Compound ann, JavacBindingResolver resolver) {
+	private transient String key;
+	private final IBinding recipient;
+
+	public JavacAnnotationBinding(Compound ann, JavacBindingResolver resolver, IBinding recipient) {
 		this.resolver = resolver;
 		this.annotation = ann;
+		this.recipient = recipient;
 	}
 
 	@Override
@@ -68,8 +72,11 @@ public IJavaElement getJavaElement() {
 
 	@Override
 	public String getKey() {
-		// TODO Auto-generated method stub
-		throw new UnsupportedOperationException("Unimplemented method 'getKey'");
+		StringBuilder builder = new StringBuilder();
+		builder.append(this.recipient.getKey());
+		builder.append('@');
+		builder.append(this.getAnnotationType().getKey());
+		return builder.toString();
 	}
 
 	@Override

org.eclipse.jdt.core.javac/src/org/eclipse/jdt/internal/javac/dom/JavacMethodBinding.java

@@ -51,7 +51,7 @@ public JavacMethodBinding(MethodSymbol sym, JavacBindingResolver resolver, List<
 
 	@Override
 	public IAnnotationBinding[] getAnnotations() {
-		return methodSymbol.getAnnotationMirrors().stream().map(ann -> new JavacAnnotationBinding(ann, this.resolver)).toArray(IAnnotationBinding[]::new);
+		return methodSymbol.getAnnotationMirrors().stream().map(ann -> new JavacAnnotationBinding(ann, this.resolver, this)).toArray(IAnnotationBinding[]::new);
 	}
 
 	@Override
@@ -217,7 +217,7 @@ public Object getDefaultValue() {
 	public IAnnotationBinding[] getParameterAnnotations(int paramIndex) {
 		VarSymbol parameter = this.methodSymbol.params.get(paramIndex);
 		return parameter.getAnnotationMirrors().stream() //
-				.map(annotation -> new JavacAnnotationBinding(annotation, this.resolver)) //
+				.map(annotation -> new JavacAnnotationBinding(annotation, this.resolver, this)) //
 				.toArray(IAnnotationBinding[]::new);
 	}
 

org.eclipse.jdt.core.javac/src/org/eclipse/jdt/internal/javac/dom/JavacTypeBinding.java

@@ -71,7 +71,7 @@ public JavacTypeBinding(final Type type, final JavacBindingResolver resolver, fi
 	@Override
 	public IAnnotationBinding[] getAnnotations() {
 		return typeSymbol.getAnnotationMirrors().stream()
-				.map(am -> new JavacAnnotationBinding(am, resolver))
+				.map(am -> new JavacAnnotationBinding(am, resolver, this))
 				.toArray(IAnnotationBinding[]::new);
 	}
 
@@ -340,7 +340,7 @@ public ITypeBinding getSuperclass() {
 	@Override
 	public IAnnotationBinding[] getTypeAnnotations() {
 		return this.typeSymbol.getAnnotationMirrors().stream() //
-				.map(annotation -> new JavacAnnotationBinding(annotation, this.resolver)) //
+				.map(annotation -> new JavacAnnotationBinding(annotation, this.resolver, this)) //
 				.toArray(IAnnotationBinding[]::new);
 	}