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.matcher;
17
18 import net.bytebuddy.build.HashCodeAndEqualsPlugin;
19 import net.bytebuddy.description.DeclaredByType;
20 import net.bytebuddy.description.type.TypeDefinition;
21 import net.bytebuddy.description.type.TypeDescription;
22
23 /**
24 * An element matcher that matches the declaring type of another element, only if this element is actually declared
25 * in a type.
26 *
27 * @param <T> The exact type of the element being matched.
28 */
29 @HashCodeAndEqualsPlugin.Enhance
30 public class DeclaringTypeMatcher<T extends DeclaredByType> extends ElementMatcher.Junction.AbstractBase<T> {
31
32 /**
33 * The type matcher to be applied if the target element is declared in a type.
34 */
35 private final ElementMatcher<? super TypeDescription.Generic> matcher;
36
37 /**
38 * Creates a new matcher for the declaring type of an element.
39 *
40 * @param matcher The type matcher to be applied if the target element is declared in a type.
41 */
42 public DeclaringTypeMatcher(ElementMatcher<? super TypeDescription.Generic> matcher) {
43 this.matcher = matcher;
44 }
45
46 /**
47 * {@inheritDoc}
48 */
49 public boolean matches(T target) {
50 TypeDefinition declaringType = target.getDeclaringType();
51 return declaringType != null && matcher.matches(declaringType.asGenericType());
52 }
53
54 @Override
55 public String toString() {
56 return "declaredBy(" + matcher + ")";
57 }
58 }
59