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Java > Open Source Codes > org > apache > tools > ant > taskdefs > condition > Or


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.taskdefs.condition;
20
21 import java.util.Enumeration JavaDoc;
22 import org.apache.tools.ant.BuildException;
23
24 /**
25  * <or> condition container.
26  *
27  * <p>Iterates over all conditions and returns true as soon as one
28  * evaluates to true.</p>
29  *
30  * @since Ant 1.4
31  */
32 public class Or extends ConditionBase implements Condition {
33
34     /**
35      * @return true if any of the contained conditions evaluate to true
36      * @exception BuildException if an error occurs
37      */
38     public boolean eval() throws BuildException {
39         Enumeration JavaDoc e = getConditions();
40         while (e.hasMoreElements()) {
41             Condition c = (Condition) e.nextElement();
42             if (c.eval()) {
43                 return true;
44             }
45         }
46         return false;
47     }
48
49 }
50
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