KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > tools > ant > types > selectors > NotSelector


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
22 /**
23  * This selector has one other selectors whose meaning it inverts. It
24  * actually relies on NoneSelector for its implementation of the
25  * isSelected() method, but it adds a check to ensure there is only one
26  * other selector contained within.
27  *
28  * @since 1.5
29  */
30 public class NotSelector extends NoneSelector {
31
32     /**
33      * Default constructor.
34      */
35     public NotSelector() {
36     }
37
38     /**
39      * Constructor that inverts the meaning of its argument.
40      * @param other the selector to invert
41      * @since Ant 1.7
42      */
43     public NotSelector(FileSelector other) {
44         this();
45         appendSelector(other);
46     }
47
48     /**
49      * @return a string representation of the selector
50      */
51     public String JavaDoc toString() {
52         StringBuffer JavaDoc buf = new StringBuffer JavaDoc();
53         if (hasSelectors()) {
54             buf.append("{notselect: ");
55             buf.append(super.toString());
56             buf.append("}");
57         }
58         return buf.toString();
59     }
60
61     /**
62      * Makes sure that there is only one entry, sets an error message if
63      * not.
64      */
65     public void verifySettings() {
66         if (selectorCount() != 1) {
67             setError("One and only one selector is allowed within the "
68                 + "<not> tag");
69         }
70     }
71
72 }
73
74
Popular Tags