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 }