ConfigurationElement.java revision 9f606f95f03a75961498803e24bee6799a7c0885 
1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21package proguard.ant;
22
23import org.apache.tools.ant.BuildException;
24import org.apache.tools.ant.types.DataType;
25import proguard.Configuration;
26
27/**
28 * This DataType represents a reference to a ProGuard configuration in Ant.
29 *
30 * @author Eric Lafortune
31 */
32public class ConfigurationElement extends DataType
33{
34    /**
35     * Adds the contents of this configuration task to the given configuration.
36     * @param configuration the configuration to be extended.
37     */
38    public void appendTo(Configuration configuration)
39    {
40        // Get the referenced element.
41        if (!isReference())
42        {
43            throw new BuildException("Nested element <configuration> must have a refid attribute");
44        }
45
46        ConfigurationTask configurationTask =
47            (ConfigurationTask)getCheckedRef(ConfigurationTask.class,
48                                             ConfigurationTask.class.getName());
49
50        // Append the referenced configuration entries to the given configuration.
51        configurationTask.appendTo(configuration);
52    }
53}
54