01: /* ====================================================================
02: The Jicarilla Software License
03:
04: Copyright (c) 2003 Leo Simons.
05: All rights reserved.
06:
07: Permission is hereby granted, free of charge, to any person obtaining
08: a copy of this software and associated documentation files (the
09: "Software"), to deal in the Software without restriction, including
10: without limitation the rights to use, copy, modify, merge, publish,
11: distribute, sublicense, and/or sell copies of the Software, and to
12: permit persons to whom the Software is furnished to do so, subject to
13: the following conditions:
14:
15: The above copyright notice and this permission notice shall be
16: included in all copies or substantial portions of the Software.
17:
18: THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19: EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20: MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21: IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
22: CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23: TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24: SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25: ==================================================================== */
26: package org.jicarilla.container.util;
27:
28: import com.thoughtworks.xstream.XStream;
29: import org.apache.avalon.framework.configuration.Configuration;
30: import org.apache.avalon.framework.configuration.ConfigurationException;
31: import org.apache.avalon.framework.configuration.DefaultConfigurationBuilder;
32: import org.jicarilla.container.Resolver;
33: import org.xml.sax.SAXException;
34:
35: import java.io.ByteArrayInputStream;
36: import java.io.IOException;
37: import java.io.InputStream;
38:
39: /**
40: * Utility methods that encapsulate heuristics for dealing with
41: * Avalon-Framework Configuration objects.
42: *
43: * @author <a href="mail at leosimons dot com">Leo Simons</a>
44: * @version $Id: ConfigurationUtil.java,v 1.2 2004/02/29 18:08:10 lsimons Exp $
45: */
46: public class ConfigurationUtil {
47: public final static String CONFIGURATION_POSTFIX = "Configuration";
48:
49: public static Configuration getConfiguration(
50: final Resolver container, final String className)
51: throws ConfigurationException, IOException, SAXException {
52: final Object obj = container.get(className
53: + CONFIGURATION_POSTFIX);
54:
55: if (obj == null)
56: throw new ConfigurationException(
57: "No configuration can be found for '" + className
58: + "'");
59:
60: if (obj instanceof Configuration)
61: return (Configuration) obj;
62:
63: return beanToConfiguration(obj);
64: }
65:
66: protected static Configuration beanToConfiguration(final Object obj)
67: throws SAXException, IOException, ConfigurationException {
68: final XStream xstream = new XStream();
69: final String configString = xstream.toXML(obj);
70:
71: final InputStream stream = new ByteArrayInputStream(
72: configString.getBytes());
73:
74: final DefaultConfigurationBuilder builder = new DefaultConfigurationBuilder();
75: final Configuration configuration = builder.build(stream);
76:
77: return configuration;
78: }
79: }
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