01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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: package org.apache.commons.io.filefilter;
18:
19: import java.io.File;
20:
21: /**
22: * This filter produces a logical NOT of the filters specified.
23: *
24: * @since Commons IO 1.0
25: * @version $Revision: 437567 $ $Date: 2006-08-28 08:39:07 +0200 (Mo, 28 Aug 2006) $
26: *
27: * @author Stephen Colebourne
28: */
29: public class NotFileFilter extends AbstractFileFilter {
30:
31: /** The filter */
32: private IOFileFilter filter;
33:
34: /**
35: * Constructs a new file filter that NOTs the result of another filters.
36: *
37: * @param filter the filter, must not be null
38: * @throws IllegalArgumentException if the filter is null
39: */
40: public NotFileFilter(IOFileFilter filter) {
41: if (filter == null) {
42: throw new IllegalArgumentException(
43: "The filter must not be null");
44: }
45: this .filter = filter;
46: }
47:
48: /**
49: * Checks to see if both filters are true.
50: *
51: * @param file the File to check
52: * @return true if the filter returns false
53: */
54: public boolean accept(File file) {
55: return !filter.accept(file);
56: }
57:
58: /**
59: * Checks to see if both filters are true.
60: *
61: * @param file the File directory
62: * @param name the filename
63: * @return true if the filter returns false
64: */
65: public boolean accept(File file, String name) {
66: return !filter.accept(file, name);
67: }
68:
69: }
|