Use method signatures to determine if interface declares java.lang.Ob…

…ject methods

src/main/java/spoon/reflect/declaration/CtMethod.java

@@ -38,6 +38,15 @@ public interface CtMethod<T> extends CtExecutable<T>, CtTypeMember, CtFormalType
 	 * </pre>
 	 */
 	boolean isOverriding(CtMethod<?> superMethod);
+
+	/**
+	 * Compares this method's signature with another method.
+	 *
+	 * @param other The other method.
+	 * @return true if both signatures are identical; false else
+	 */
+	boolean hasSameSignature(CtMethod<?> other);
+
 	/**
 	 * Checks if the method is a default method. Default method can be in interfaces from
 	 * Java 8: http://docs.oracle.com/javase/tutorial/java/IandI/defaultmethods.html.

src/main/java/spoon/support/reflect/code/CtLambdaImpl.java

@@ -124,7 +124,7 @@ public <R> CtMethod<R> getOverriddenMethod() {
 			lambdaExecutableMethod = lambdaTypeMethods.iterator().next();
 		} else {
 			for (CtMethod<?> method : lambdaTypeMethods) {
-				if (getFactory().Method().OBJECT_METHODS.contains(method)) {
+				if (getFactory().Method().OBJECT_METHODS.stream().anyMatch(method::hasSameSignature)) {
 					continue;
 				}
 				if (method.isDefaultMethod() || method.hasModifier(ModifierKind.PRIVATE) || method.hasModifier(ModifierKind.STATIC)) {

src/main/java/spoon/support/reflect/declaration/CtMethodImpl.java

@@ -200,6 +200,11 @@ public boolean isOverriding(CtMethod<?> superMethod) {
 		return new ClassTypingContext(getDeclaringType()).isOverriding(this, superMethod);
 	}
 
+	@Override
+	public boolean hasSameSignature(CtMethod<?> other) {
+		return getSignature().equals(other.getSignature());
+	}
+
 	@MetamodelPropertyField(role = CtRole.IS_SHADOW)
 	boolean isShadow;