InnerClassFilenameFilter


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.tools.ant.taskdefs.optional.ejb;
19  
20  import java.io.File  ;
21  import java.io.FilenameFilter  ;
22  
23  /**
24   * A filename filter for inner class files of a particular class.
25   */
26  public class InnerClassFilenameFilter implements FilenameFilter   {
27      private String   baseClassName;
28  
29      /**
30       * Constructor of filter.
31       * @param baseclass the class to filter inner classes on.
32       */
33      InnerClassFilenameFilter(String   baseclass) {
34          int extidx = baseclass.lastIndexOf(".class");
35          if (extidx == -1) {
36              extidx = baseclass.length() - 1;
37          }
38          baseClassName = baseclass.substring(0, extidx);
39      }
40  
41      /**
42       * Check if the file name passes the filter.
43       * @param dir not used.
44       * @param filename the filename to filter on.
45       * @return true if the filename is an inner class of the base class.
46       */
47      public boolean accept(File   dir, String   filename) {
48          if ((filename.lastIndexOf(".") != filename.lastIndexOf(".class"))
49              || (filename.indexOf(baseClassName + "$") != 0)) {
50              return false;
51          }
52          return true;
53      }
54  }
55
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