/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt 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.vfs.plugins.classloader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.jboss.classloading.spi.metadata.ClassLoadingMetaData;
import org.jboss.deployers.spi.DeploymentException;
import org.jboss.deployers.spi.deployer.DeploymentStages;
import org.jboss.deployers.vfs.spi.deployer.AbstractOptionalVFSRealDeployer;
import org.jboss.deployers.vfs.spi.structure.VFSDeploymentUnit;
import org.jboss.deployers.vfs.spi.structure.helpers.ClassPathVisitor;
import org.jboss.vfs.VirtualFile;
import org.jboss.vfs.util.automount.Automounter;
/**
* VFSClassLoaderClassPathDeployer.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 1.1 $
*/
public class VFSClassLoaderClassPathDeployer extends AbstractOptionalVFSRealDeployer<ClassLoadingMetaData>
{
/** The vfs classpath */
public static String VFS_CLASS_PATH = "org.jboss.deployers.vfs.plugins.classloader.VFS_CLASS_PATH";
/** The vfs excluded */
public static String VFS_EXCLUDES = "org.jboss.deployers.vfs.plugins.classloader.VFS_EXCLUDES";
/**
* Create a new VFSClassLoaderClassPathDeployer.
*/
public VFSClassLoaderClassPathDeployer()
{
super(ClassLoadingMetaData.class);
setOutput(ClassLoadingMetaData.class);
setStage(DeploymentStages.DESCRIBE);
}
@Override
@SuppressWarnings("unchecked")
public void deploy(VFSDeploymentUnit unit, ClassLoadingMetaData deployment) throws DeploymentException
{
// We aren't creating a classloader
if (unit.isTopLevel() == false && deployment == null)
return;
// Locate the parent class path
List<VirtualFile> parentClassPath = null;
Set<VirtualFile> parentExcludes = null;
VFSDeploymentUnit parent = unit.getParent();
while (parent != null)
{
parentClassPath = parent.getAttachment(VFS_CLASS_PATH, List.class);
if (parentClassPath != null)
{
parentExcludes = parent.getAttachment(VFS_EXCLUDES, Set.class);
break;
}
else
parent = parent.getParent();
}
// Get our classpath
ClassPathVisitor visitor = new ClassPathVisitor(unit);
unit.visit(visitor);
Set<VirtualFile> rawClassPath = visitor.getClassPath();
// We're creating the classpath
List<VirtualFile> vfsClassPath = new ArrayList<VirtualFile>();
unit.addAttachment(VFS_CLASS_PATH, vfsClassPath, List.class);
Set<VirtualFile> vfsExcludes = new HashSet<VirtualFile>();
unit.addAttachment(VFS_EXCLUDES, vfsExcludes, Set.class);
// Whether our classloader can see the parent
boolean canSeeParent = parentClassPath != null && deployment.getParentDomain() == null;
// Add all the classpath elements unless we can see the parent and its already in the parent
if (rawClassPath != null)
{
for (VirtualFile file : rawClassPath)
{
if (vfsClassPath.contains(file) == false)
{
if (canSeeParent == false || (canSeeParent && parentClassPath.contains(file) == false))
{
try
{
Automounter.mount(unit.getRoot(), file);
}
catch (IOException e)
{
DeploymentException.rethrowAsDeploymentException("Failed to mount " + file, e);
}
vfsClassPath.add(file);
}
}
}
}
// Exclude those elements from the parent that it doesn't explicitly have
if (parentClassPath != null)
{
VirtualFile root = unit.getRoot();
if (root != null && parentClassPath.contains(root) == false)
parentExcludes.add(root);
for (VirtualFile file : vfsClassPath)
{
if (parentClassPath.contains(file) == false)
{
parentExcludes.add(file);
}
}
}
}
@Override
public void undeploy(VFSDeploymentUnit unit, ClassLoadingMetaData deployment)
{
unit.removeAttachment(VFS_CLASS_PATH);
unit.removeAttachment(VFS_EXCLUDES);
}
}