/*
* JBoss, Home of Professional Open Source
* Copyright 2007, 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.classloading.spi.dependency.policy;
import org.jboss.classloader.spi.ClassLoaderPolicy;
import org.jboss.classloader.spi.ClassLoaderPolicyFactory;
import org.jboss.classloading.spi.dependency.Domain;
import org.jboss.classloading.spi.dependency.Module;
import org.jboss.classloading.spi.dependency.RequirementDependencyItem;
import org.jboss.dependency.spi.Controller;
/**
* DynamicClassLoaderPolicyFactory.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @version $Revision: 1.1 $
*/
public class DynamicClassLoaderPolicyFactory implements ClassLoaderPolicyFactory
{
/** The controller */
private Controller controller;
/** The domain */
private Domain domain;
/** The requirement dependency item */
private RequirementDependencyItem item;
/**
* Create a new DynamicClassLoaderPolicyFactory.
*
* @param controller the controller
* @param domain the domain
* @param item the item
*/
public DynamicClassLoaderPolicyFactory(Controller controller, Domain domain, RequirementDependencyItem item)
{
if (controller == null)
throw new IllegalArgumentException("Null controller");
if (domain == null)
throw new IllegalArgumentException("Null domain");
if (item == null)
throw new IllegalArgumentException("Null item");
this.controller = controller;
this.domain = domain;
this.item = item;
}
public ClassLoaderPolicy createClassLoaderPolicy()
{
// Still undetermined
String name = (String) item.getIDependOn();
if (name == null)
{
// Try to resolve
item.resolve(controller);
name = (String) item.getIDependOn();
if (name == null)
return null;
}
Module iDependOnModule = domain.getModule(name);
if (iDependOnModule == null)
throw new IllegalStateException("Module not found with name: " + name);
// Get the policy for the module
if (iDependOnModule instanceof ClassLoaderPolicyModule == false)
throw new IllegalStateException("Unable to determine ClassLoaderPolicy from module: " + iDependOnModule);
ClassLoaderPolicyModule classLoaderPolicyModule = (ClassLoaderPolicyModule) iDependOnModule;
return classLoaderPolicyModule.getPolicy();
}
}