1 /*
2 * Copyright 2014 - 2020 Rafael Winterhalter
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package net.bytebuddy.implementation.bind;
17
18 import net.bytebuddy.description.method.MethodDescription;
19 import net.bytebuddy.description.type.TypeDescription;
20
21 /**
22 * This ambiguity resolver matches that method out of two methods that is declared by the more specific type. If two
23 * methods are declared by the same type or by two unrelated types, this resolver returns an ambiguous result.
24 */
25 public enum DeclaringTypeResolver implements MethodDelegationBinder.AmbiguityResolver {
26
27 /**
28 * The singleton instance.
29 */
30 INSTANCE;
31
32 /**
33 * {@inheritDoc}
34 */
35 public Resolution resolve(MethodDescription source,
36 MethodDelegationBinder.MethodBinding left,
37 MethodDelegationBinder.MethodBinding right) {
38 TypeDescription leftType = left.getTarget().getDeclaringType().asErasure();
39 TypeDescription rightType = right.getTarget().getDeclaringType().asErasure();
40 if (leftType.equals(rightType)) {
41 return Resolution.AMBIGUOUS;
42 } else if (leftType.isAssignableFrom(rightType)) {
43 return Resolution.RIGHT;
44 } else if (leftType.isAssignableTo(rightType)) {
45 return Resolution.LEFT;
46 } else {
47 return Resolution.AMBIGUOUS;
48 }
49 }
50 }
51