/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb.plugins.cmp.jdbc.metadata;
import java.net.URL;
import org.jboss.deployment.DeploymentException;
import org.jboss.logging.Logger;
import org.jboss.metadata.XmlFileLoader;
import org.jboss.ejb.Container;
import org.jboss.vfs.VirtualFile;
import org.w3c.dom.Element;
/**
* Immutable class which loads the JDBC application meta data from the jbosscmp-jdbc.xml files.
*
* @author <a href="mailto:dain@daingroup.com">Dain Sundstrom</a>
* @author <a href="sebastien.alborini@m4x.org">Sebastien Alborini</a>
* @author <a href="mailto:alex@jboss.com">Alexey Loubyansky</a>
* @version $Revision: 101688 $
*/
public final class JDBCXmlFileLoader {
private final Container container;
private final Logger log;
/**
* Constructs a JDBC XML file loader, which loads the JDBC application meta data from
* the jbosscmp-xml files.
*
* @param con the container
* @param log the log for this application
*/
public JDBCXmlFileLoader(Container con, Logger log)
{
this.container = con;
this.log = log;
}
/**
* Loads the application meta data from the jbosscmp-jdbc.xml file
*
* @return the jdbc application meta data loaded from the jbosscmp-jdbc.xml files
*/
public JDBCApplicationMetaData load() throws DeploymentException {
JDBCApplicationMetaData jamd = new JDBCApplicationMetaData(
container.getBeanMetaData().getApplicationMetaData(), container.getClassLoader()
);
// Load standardjbosscmp-jdbc.xml from the default classLoader
// we always load defaults first
URL stdJDBCUrl = container.getClassLoader().getResource("standardjbosscmp-jdbc.xml");
if(stdJDBCUrl == null) {
throw new DeploymentException("No standardjbosscmp-jdbc.xml found");
}
boolean debug = log.isDebugEnabled();
if (debug)
log.debug("Loading standardjbosscmp-jdbc.xml : " + stdJDBCUrl.toString());
Element stdJDBCElement = XmlFileLoader.getDocument(stdJDBCUrl, true).getDocumentElement();
// first create the metadata
jamd = new JDBCApplicationMetaData(stdJDBCElement, jamd);
// Load jbosscmp-jdbc.xml if provided
URL jdbcUrl = null;
VirtualFile dd = container.getDeploymentUnit().getMetaDataFile("jbosscmp-jdbc.xml");
if(dd != null)
{
try
{
jdbcUrl = dd.toURL();
}
catch(Exception e)
{
throw new IllegalStateException("Failed to create URL for " + dd.getPathName(), e);
}
}
if(jdbcUrl != null)
{
if (debug)
log.debug(jdbcUrl.toString() + " found. Overriding defaults");
Element jdbcElement = XmlFileLoader.getDocument(jdbcUrl, true).getDocumentElement();
jamd = new JDBCApplicationMetaData(jdbcElement, jamd);
}
return jamd;
}
}