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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