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 */ 017 018 package org.apache.commons.proxy.interceptor.filter; 019 020 import org.apache.commons.proxy.interceptor.MethodFilter; 021 022 import java.lang.reflect.Method; 023 import java.util.Arrays; 024 import java.util.Collection; 025 import java.util.HashSet; 026 import java.util.Set; 027 028 /** 029 * Filters methods based on their return type. 030 * @author James Carman 031 * @since 1.0 032 */ 033 public class ReturnTypeFilter implements MethodFilter 034 { 035 private final Set validReturnTypes = new HashSet(); 036 037 public ReturnTypeFilter( Class[] validReturnTypes ) 038 { 039 this( Arrays.asList( validReturnTypes ) ); 040 } 041 042 public ReturnTypeFilter( Collection validReturnTypes ) 043 { 044 this.validReturnTypes.addAll( validReturnTypes ); 045 } 046 047 public boolean accepts( Method method ) 048 { 049 return validReturnTypes.contains( method.getReturnType() ); 050 } 051 }