1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.proxy.interceptor.filter;
19
20 import org.apache.commons.proxy.interceptor.MethodFilter;
21
22 import java.lang.reflect.Method;
23 import java.util.Arrays;
24 import java.util.Collection;
25 import java.util.HashSet;
26 import java.util.Set;
27
28 /**
29 * Filters methods based on their return type.
30 * @author James Carman
31 * @since 1.0
32 */
33 public class ReturnTypeFilter implements MethodFilter
34 {
35 private final Set validReturnTypes = new HashSet();
36
37 public ReturnTypeFilter( Class[] validReturnTypes )
38 {
39 this( Arrays.asList( validReturnTypes ) );
40 }
41
42 public ReturnTypeFilter( Collection validReturnTypes )
43 {
44 this.validReturnTypes.addAll( validReturnTypes );
45 }
46
47 public boolean accepts( Method method )
48 {
49 return validReturnTypes.contains( method.getReturnType() );
50 }
51 }