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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  import java.util.Arrays;
24  import java.util.HashSet;
25  import java.util.Set;
26  
27  /**
28   * A simple method filter implementation that merely returns true if the method's name is in a set of accepted names.
29   *
30   * @author James Carman
31   * @since 1.0
32   */
33  public class SimpleFilter implements MethodFilter
34  {
35  //----------------------------------------------------------------------------------------------------------------------
36  // Fields
37  //----------------------------------------------------------------------------------------------------------------------
38  
39      private final Set methodNames;
40  
41  //----------------------------------------------------------------------------------------------------------------------
42  // Constructors
43  //----------------------------------------------------------------------------------------------------------------------
44  
45      /**
46       * Creates a simple filter that accepts no methods.
47       */
48      public SimpleFilter()
49      {
50          this.methodNames = new HashSet();
51      }
52  
53      /**
54       * Creates a simple filter that accepts methods matching the supplied names.
55       * @param methodNames the names
56       */
57      public SimpleFilter( String[] methodNames )
58      {
59          this.methodNames = new HashSet( Arrays.asList( methodNames ) );
60      }
61  
62  //----------------------------------------------------------------------------------------------------------------------
63  // MethodFilter Implementation
64  //----------------------------------------------------------------------------------------------------------------------
65  
66      public boolean accepts( Method method )
67      {
68          return methodNames.contains( method.getName() );
69      }
70  }
71