KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > commons > io > filefilter > NotFileFilter


1 /*
2  * Copyright 2002-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.commons.io.filefilter;
17
18 import java.io.File JavaDoc;
19
20 /**
21  * This filter produces a logical NOT of the filters specified.
22  *
23  * @since Commons IO 1.0
24  * @version $Revision: 1.6 $ $Date: 2004/02/23 04:37:57 $
25  *
26  * @author Stephen Colebourne
27  */
28 public class NotFileFilter extends AbstractFileFilter {
29     
30     /** The filter */
31     private IOFileFilter filter;
32
33     /**
34      * Constructs a new file filter that NOTs the result of another filters.
35      *
36      * @param filter the filter, must not be null
37      * @throws IllegalArgumentException if the filter is null
38      */
39     public NotFileFilter(IOFileFilter filter) {
40         if (filter == null) {
41             throw new IllegalArgumentException JavaDoc("The filter must not be null");
42         }
43         this.filter = filter;
44     }
45
46     /**
47      * Checks to see if both filters are true.
48      *
49      * @param file the File to check
50      * @return true if the filter returns false
51      */
52     public boolean accept(File JavaDoc file) {
53         return ! filter.accept(file);
54     }
55     
56     /**
57      * Checks to see if both filters are true.
58      *
59      * @param file the File directory
60      * @param name the filename
61      * @return true if the filter returns false
62      */
63     public boolean accept(File JavaDoc file, String JavaDoc name) {
64         return ! filter.accept(file, name);
65     }
66     
67 }
68
Popular Tags