/*
* JBoss, Home of Professional Open Source.
* Copyright 2007, 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.deployers.structure.spi.helpers;
import java.lang.reflect.Field;
import java.util.Comparator;
import java.util.List;
import org.jboss.deployers.client.spi.Deployment;
import org.jboss.deployers.spi.DeploymentException;
import org.jboss.deployers.spi.DeploymentState;
import org.jboss.deployers.spi.attachments.Attachments;
import org.jboss.deployers.spi.structure.ContextInfo;
import org.jboss.deployers.spi.structure.StructureMetaData;
import org.jboss.deployers.spi.structure.StructureMetaDataFactory;
import org.jboss.deployers.structure.spi.DeploymentContext;
import org.jboss.deployers.structure.spi.StructureBuilder;
import org.jboss.logging.Logger;
/**
* AbstractStructureBuilder.
*
* @author <a href="adrian@jboss.org">Adrian Brock</a>
* @version $Revision: 1.1 $
*/
public class AbstractStructureBuilder implements StructureBuilder
{
/** The log */
private final Logger log = Logger.getLogger(getClass());
public DeploymentContext populateContext(Deployment deployment, StructureMetaData metaData) throws DeploymentException
{
if (deployment == null)
throw new IllegalArgumentException("Null deployment");
boolean trace = log.isTraceEnabled();
if (trace)
log.trace("Populating deployment " + deployment.getName() + " metaData=" + metaData);
DeploymentContext result = null;
try
{
result = createRootDeploymentContext(deployment);
if (result == null)
throw new IllegalStateException("Root deployment context is null");
result.setDeployment(deployment);
ContextInfo contextInfo = metaData.getContext("");
if (contextInfo == null)
contextInfo = StructureMetaDataFactory.createContextInfo("", null);
contextInfo.setPredeterminedManagedObjects(deployment.getPredeterminedManagedObjects());
applyContextInfo(result, contextInfo);
}
catch (Throwable t)
{
throw DeploymentException.rethrowAsDeploymentException("Error populating deployment " + deployment.getName(), t);
}
try
{
if (metaData != null)
{
result.getTransientManagedObjects().addAttachment(StructureMetaData.class, metaData);
populateContext(result, metaData);
}
}
catch (Throwable t)
{
result.setProblem(t);
result.setState(DeploymentState.ERROR);
log.warn("Error populating deployment " + deployment.getName(), t);
}
return result;
}
/**
* Populate the child deployment contexts
*
* @param context the context
* @param metaData the metadata
* @throws Exception for any error
*/
protected void populateContext(DeploymentContext context, StructureMetaData metaData) throws Exception
{
if (context == null)
throw new IllegalArgumentException("Null context");
if (metaData == null)
throw new IllegalArgumentException("Null metaData");
boolean trace = log.isTraceEnabled();
if (trace)
log.trace("Populating Context " + context.getName() + " metaData=" + metaData);
List<ContextInfo> contexts = metaData.getContexts();
if (contexts == null)
return;
try
{
for (ContextInfo child : contexts)
{
// Only process the child contexts
if ("".equals(child.getPath()) == false)
{
DeploymentContext childContext = createChildDeploymentContext(context, child);
if (childContext == null)
throw new IllegalStateException("Child deployment context is null");
context.addChild(childContext);
childContext.setParent(context);
applyContextInfo(childContext, child);
Attachments attachments = child.getPredeterminedManagedObjects();
if (attachments != null)
{
StructureMetaData childStructure = attachments.getAttachment(StructureMetaData.class);
if (childStructure != null)
populateContext(childContext, childStructure);
}
}
}
}
catch (Throwable t)
{
throw DeploymentException.rethrowAsDeploymentException("Error populating context " + context.getName(), t);
}
}
/**
* Apply the context info. This transfers the PredeterminedManagedObjects
* and TransientManagedObjects and other information from the ContextInfo to the DeploymentContext.
*
* @param context the context
* @param contextInfo the contextInfo
* @throws Exception for any error
*/
protected void applyContextInfo(DeploymentContext context, ContextInfo contextInfo) throws Exception
{
Attachments attachments = contextInfo.getPredeterminedManagedObjects();
if (attachments != null)
context.setPredeterminedManagedObjects(attachments);
context.setRelativeOrder(contextInfo.getRelativeOrder());
applyComparator(context, contextInfo);
}
/**
* Try to apply the comparator
*
* @param context the context
* @param contextInfo the contextInfo
* @throws Exception for any error
*/
@SuppressWarnings("unchecked")
protected void applyComparator(DeploymentContext context, ContextInfo contextInfo) throws Exception
{
String className = contextInfo.getComparatorClassName();
if (className == null)
return;
Object o = null;
try
{
Class clazz = Thread.currentThread().getContextClassLoader().loadClass(className);
try
{
Field field = clazz.getField("INSTANCE");
o = field.get(null);
}
catch (NoSuchFieldException ignored)
{
}
if (o == null)
o = clazz.newInstance();
Comparator comparator = Comparator.class.cast(o);
context.setComparator(comparator);
}
catch (Throwable t)
{
log.warn("Unable to load/set comparator: " + className);
}
}
/**
* Create the root deployment context
*
* @param deployment the deployment
* @return the deployment context
* @throws Exception for any error
*/
protected DeploymentContext createRootDeploymentContext(Deployment deployment) throws Exception
{
return new AbstractDeploymentContext(deployment.getName(), "");
}
/**
* Create a child deployment context
*
* @param parent the parent deployment context
* @param child the child context
* @return the deployment context
* @throws Exception for any error
*/
protected DeploymentContext createChildDeploymentContext(DeploymentContext parent, ContextInfo child) throws Exception
{
String path = child.getPath();
String name = parent.getName() + "/" + path;
return new AbstractDeploymentContext(name, path);
}
}