001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.proxy2.interceptor.matcher.invocation;
019
020import org.apache.commons.proxy2.Invocation;
021import org.apache.commons.proxy2.interceptor.matcher.InvocationMatcher;
022
023/**
024 * InvocationMatcher based on declaring class of the method invoked.
025 */
026public class DeclaredByMatcher implements InvocationMatcher
027{
028    //******************************************************************************************************************
029    // Fields
030    //******************************************************************************************************************
031
032    private final boolean exactMatch;
033    private final Class<?> declaredByType;
034
035    //******************************************************************************************************************
036    // Constructors
037    //******************************************************************************************************************
038
039    /**
040     * Equivalent to {@link #DeclaredByMatcher(Class, boolean)}{@code (declaredByType, false)}
041     * 
042     * @param declaredByType
043     */
044    public DeclaredByMatcher(Class<?> declaredByType)
045    {
046        this(declaredByType, false);
047    }
048
049    /**
050     * Create a {@link DeclaredByMatcher} instance.
051     * 
052     * @param declaredByType
053     *            type by which method must be declared
054     * @param exactMatch
055     *            if {@code false}, {@code declaredByType} may be a subclass of the actual declaring class of the
056     *            invocation method.
057     */
058    public DeclaredByMatcher(Class<?> declaredByType, boolean exactMatch)
059    {
060        this.declaredByType = declaredByType;
061        this.exactMatch = exactMatch;
062    }
063
064    //******************************************************************************************************************
065    // InvocationMatcher Implementation
066    //******************************************************************************************************************
067
068    @Override
069    public boolean matches(Invocation invocation)
070    {
071        final Class<?> owner = invocation.getMethod().getDeclaringClass();
072        return exactMatch ? declaredByType.equals(owner) : owner.isAssignableFrom(declaredByType);
073    }
074}