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
24 /**
25 * A method filter implementation that returns true if the method's name matches a supplied regular expression (JDK
26 * regex) pattern string.
27 *
28 * @author James Carman
29 * @since 1.0
30 */
31 public class PatternFilter implements MethodFilter
32 {
33 //----------------------------------------------------------------------------------------------------------------------
34 // Fields
35 //----------------------------------------------------------------------------------------------------------------------
36
37 public static String GETTER_SETTER_PATTERN = "get\\w+|set\\w+";
38 private final String pattern;
39
40 //----------------------------------------------------------------------------------------------------------------------
41 // Static Methods
42 //----------------------------------------------------------------------------------------------------------------------
43
44 /**
45 * Returns a {@link MethodFilter} which accepts only "getters" and "setters."
46 *
47 * @return a {@link MethodFilter} which accepts only "getters" and "setters."
48 */
49 public static MethodFilter getterSetterFilter()
50 {
51 return new PatternFilter( GETTER_SETTER_PATTERN );
52 }
53
54 //----------------------------------------------------------------------------------------------------------------------
55 // Constructors
56 //----------------------------------------------------------------------------------------------------------------------
57
58 public PatternFilter( String pattern )
59 {
60 this.pattern = pattern;
61 }
62
63 //----------------------------------------------------------------------------------------------------------------------
64 // MethodFilter Implementation
65 //----------------------------------------------------------------------------------------------------------------------
66
67 public boolean accepts( Method method )
68 {
69 return method.getName().matches( pattern );
70 }
71 }
72