OrSelector


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  
19  package org.apache.tools.ant.types.selectors;
20  
21  import java.io.File  ;
22  import java.util.Enumeration  ;
23  
24  /**
25   * This selector has a collection of other selectors, any of which have to
26   * select a file in order for this selector to select it.
27   *
28   * @since 1.5
29   */
30  public class OrSelector extends BaseSelectorContainer {
31  
32      /**
33       * Default constructor.
34       */
35      public OrSelector() {
36      }
37  
38      /**
39       * @return a string representation of the selector
40       */
41      public String   toString() {
42          StringBuffer   buf = new StringBuffer  ();
43          if (hasSelectors()) {
44              buf.append("{orselect: ");
45              buf.append(super.toString());
46              buf.append("}");
47          }
48          return buf.toString();
49      }
50  
51      /**
52       * Returns true (the file is selected) if any of the other selectors
53       * agree that the file should be selected.
54       *
55       * @param basedir the base directory the scan is being done from
56       * @param filename the name of the file to check
57       * @param file a java.io.File object for the filename that the selector
58       * can use
59       * @return whether the file should be selected or not
60       */
61      public boolean isSelected(File   basedir, String   filename, File   file) {
62          validate();
63          Enumeration   e = selectorElements();
64          boolean result;
65  
66          // First, check that all elements are correctly configured
67          while (e.hasMoreElements()) {
68              result = ((FileSelector) e.nextElement()).isSelected(basedir,
69                      filename, file);
70              if (result) {
71                  return true;
72              }
73          }
74          return false;
75      }
76  
77  }
78  
79
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