blob: c8950bcbbcc787e4b9caa75b8288cd917a711d23 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/*
* Copyright 2001-2002,2004 Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.taskdefs.condition;
import org.apache.tools.ant.BuildException;
/**
* <not> condition.
*
* Evaluates to true if the single condition nested into it is false
* and vice versa.
*
* @author Stefan Bodewig
* @since Ant 1.4
* @version $Revision$
*/
public class Not extends ConditionBase implements Condition {
/**
* Evaluate condition
*
* @return true if the condition is true.
* @throws BuildException if the condition is not configured correctly.
*/
public boolean eval() throws BuildException {
if (countConditions() > 1) {
throw new BuildException("You must not nest more than one "
+ "condition into <not>");
}
if (countConditions() < 1) {
throw new BuildException("You must nest a condition into <not>");
}
return !((Condition) getConditions().nextElement()).eval();
}
}
|
