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Java > Open Source Codes > org > jboss > deployers > plugins > structure > vfs > explicit > DeclaredStructure


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2006, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.deployers.plugins.structure.vfs.explicit;
23
24 import java.io.IOException JavaDoc;
25 import java.net.URL JavaDoc;
26
27 import org.jboss.deployers.plugins.structure.vfs.AbstractStructureDeployer;
28 import org.jboss.deployers.spi.structure.vfs.StructureMetaData;
29 import org.jboss.deployers.spi.structure.vfs.StructuredDeployers;
30 import org.jboss.virtual.VirtualFile;
31 import org.jboss.xb.binding.Unmarshaller;
32 import org.jboss.xb.binding.UnmarshallerFactory;
33
34 /**
35  * A structural deployer that looks for a jboss-structure.xml descriptor as
36  * the defining structure.
37  *
38  * @author Scott.Stark@jboss.org
39  * @version $Revision: 1.1 $
40  */
41 public class DeclaredStructure extends AbstractStructureDeployer
42 {
43    private static ThreadLocal JavaDoc<StructureMetaData> activeMetaData
44       = new ThreadLocal JavaDoc<StructureMetaData>();
45
46    /**
47     * Set the relative order to 0 by default.
48     */
49    public DeclaredStructure()
50    {
51       setRelativeOrder(0);
52    }
53
54    public boolean determineStructure(VirtualFile root, StructureMetaData metaData, StructuredDeployers deployers)
55    {
56       try
57       {
58          if( root.isLeaf() == false )
59          {
60             try
61             {
62                VirtualFile jbossStructure = root.findChild("META-INF/jboss-structure.xml");
63                log.trace("... context has a META-INF subdirectory");
64                URL JavaDoc url = jbossStructure.toURL();
65                UnmarshallerFactory factory = UnmarshallerFactory.newInstance();
66                Unmarshaller unmarshaller = factory.newUnmarshaller();
67                StructureMetaDataObjectFactory ofactory = new StructureMetaDataObjectFactory();
68                unmarshaller.unmarshal(url.toString(), ofactory, metaData);
69                activeMetaData.set(metaData);
70             }
71             catch (IOException JavaDoc e)
72             {
73                log.trace("... no META-INF subdirectory.");
74                return false;
75             }
76             return true;
77          }
78       }
79       catch (Exception JavaDoc e)
80       {
81          log.warn("Error determining structure: " + root.getName(), e);
82       }
83       return false;
84    }
85 }
86
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