/*
 * Copyright 2014 - 2020 Rafael Winterhalter
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.bytebuddy.matcher;

import net.bytebuddy.build.HashCodeAndEqualsPlugin;
import net.bytebuddy.description.method.MethodDescription;
import net.bytebuddy.description.type.TypeDefinition;
import net.bytebuddy.description.type.TypeDescription;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import static net.bytebuddy.matcher.ElementMatchers.isVirtual;

A matcher that checks if any super type of a type declares a method with the same shape of a matched method.
Type parameters:
  • <T> – The type of the matched entity.
/** * A matcher that checks if any super type of a type declares a method with the same shape of a matched method. * * @param <T> The type of the matched entity. */
@HashCodeAndEqualsPlugin.Enhance public class MethodOverrideMatcher<T extends MethodDescription> extends ElementMatcher.Junction.AbstractBase<T> {
The matcher that is to be applied to the type that declares a method of the same shape.
/** * The matcher that is to be applied to the type that declares a method of the same shape. */
private final ElementMatcher<? super TypeDescription.Generic> matcher;
Creates a new method override matcher.
Params:
  • matcher – The matcher that is to be applied to the type that declares a method of the same shape.
/** * Creates a new method override matcher. * * @param matcher The matcher that is to be applied to the type that declares a method of the same shape. */
public MethodOverrideMatcher(ElementMatcher<? super TypeDescription.Generic> matcher) { this.matcher = matcher; }
{@inheritDoc}
/** * {@inheritDoc} */
public boolean matches(T target) { Set<TypeDescription> duplicates = new HashSet<TypeDescription>(); for (TypeDefinition typeDefinition : target.getDeclaringType()) { if (matches(target, typeDefinition) || matches(target, typeDefinition.getInterfaces(), duplicates)) { return true; } } return false; }
Matches a method against a list of types.
Params:
  • target – The method that is matched as a target.
  • typeDefinitions – The type definitions to check if they declare a method with the same signature as target.
  • duplicates – A set containing duplicate interfaces that do not need to be revisited.
Returns:true if any type defines a method with the same signature as the target method.
/** * Matches a method against a list of types. * * @param target The method that is matched as a target. * @param typeDefinitions The type definitions to check if they declare a method with the same signature as {@code target}. * @param duplicates A set containing duplicate interfaces that do not need to be revisited. * @return {@code true} if any type defines a method with the same signature as the {@code target} method. */
private boolean matches(MethodDescription target, List<? extends TypeDefinition> typeDefinitions, Set<TypeDescription> duplicates) { for (TypeDefinition anInterface : typeDefinitions) { if (duplicates.add(anInterface.asErasure()) && (matches(target, anInterface) || matches(target, anInterface.getInterfaces(), duplicates))) { return true; } } return false; }
Checks if a type declares a method with the same signature as target.
Params:
  • target – The method to be checked.
  • typeDefinition – The type to check for declaring a method with the same signature as target.
Returns:true if the supplied type declares a compatible method.
/** * Checks if a type declares a method with the same signature as {@code target}. * * @param target The method to be checked. * @param typeDefinition The type to check for declaring a method with the same signature as {@code target}. * @return {@code true} if the supplied type declares a compatible method. */
private boolean matches(MethodDescription target, TypeDefinition typeDefinition) { for (MethodDescription methodDescription : typeDefinition.getDeclaredMethods().filter(isVirtual())) { if (methodDescription.asSignatureToken().equals(target.asSignatureToken())) { if (matcher.matches(typeDefinition.asGenericType())) { return true; } else { break; } } } return false; } @Override public String toString() { return "isOverriddenFrom(" + matcher + ")"; } }