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Java > Open Source Codes > net > sf > antcontrib > logic > Throw


1 /*
2  * The Apache Software License, Version 1.1
3  *
4  * Copyright (c) 2002 Ant-Contrib project. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in
15  * the documentation and/or other materials provided with the
16  * distribution.
17  *
18  * 3. The end-user documentation included with the redistribution, if
19  * any, must include the following acknowlegement:
20  * "This product includes software developed by the
21  * Ant-Contrib project (http://sourceforge.net/projects/ant-contrib)."
22  * Alternately, this acknowlegement may appear in the software itself,
23  * if and wherever such third-party acknowlegements normally appear.
24  *
25  * 4. The name Ant-Contrib must not be used to endorse or promote products
26  * derived from this software without prior written permission. For
27  * written permission, please contact
28  * ant-contrib-developers@lists.sourceforge.net.
29  *
30  * 5. Products derived from this software may not be called "Ant-Contrib"
31  * nor may "Ant-Contrib" appear in their names without prior written
32  * permission of the Ant-Contrib project.
33  *
34  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
35  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
36  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
37  * DISCLAIMED. IN NO EVENT SHALL THE ANT-CONTRIB PROJECT OR ITS
38  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
41  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
42  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
43  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
44  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
45  * SUCH DAMAGE.
46  * ====================================================================
47  */
48 package net.sf.antcontrib.logic;
49
50 import org.apache.tools.ant.BuildException;
51 import org.apache.tools.ant.taskdefs.Exit;
52 import org.apache.tools.ant.types.Reference;
53
54 /**
55  * Extension of <code>&lt;fail&gt;</code> that can throw an exception
56  * that is a reference in the project.
57  *
58  * <p>This may be useful inside the <code>&lt;catch&gt;</code> block
59  * of a <code>&lt;trycatch&gt;</code> task if you want to rethrow the
60  * exception just caught.</p>
61  */
62 public class Throw extends Exit {
63
64     private Reference ref;
65
66     /**
67      * The reference that points to a BuildException.
68      */
69     public void setRefid(Reference ref) {
70         this.ref = ref;
71     }
72
73     public void execeute() throws BuildException {
74         Object JavaDoc reffed = ref != null
75             ? ref.getReferencedObject(getProject())
76             : null;
77         if (reffed != null && reffed instanceof BuildException) {
78             throw (BuildException) reffed;
79         }
80         super.execute();
81     }
82 }
83
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