/*
* 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.dependency.plugins;
import org.jboss.dependency.spi.Controller;
import org.jboss.dependency.spi.ControllerContext;
import org.jboss.dependency.spi.ControllerState;
import org.jboss.dependency.spi.DependencyItem;
import org.jboss.util.JBossStringBuilder;
/**
* Owner callback item.
*
* @param <T> the callback type
* @param <C> owner type
* @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a>
*/
public abstract class OwnerCallbackItem<T, C> extends AbstractCallbackItem<T>
{
protected C owner;
protected OwnerCallbackItem(T name, String attributeName, C owner)
{
this(name, null, null, attributeName, owner);
}
protected OwnerCallbackItem(T name, ControllerState whenRequired, ControllerState dependentState, String attributeName, C owner)
{
super(name, whenRequired, dependentState, attributeName);
if (owner == null)
throw new IllegalArgumentException("Null owner!");
this.owner = owner;
}
/**
* Add dependency.
*
* @param controller the controller
* @param context changed context
* @param isInstallPhase install or uninstall phase
*/
protected void addDependency(Controller controller, ControllerContext context, boolean isInstallPhase)
{
if (owner instanceof ControllerContext)
{
ControllerContext co = (ControllerContext)owner;
DependencyItem dependency = createDependencyItem(co);
if (dependency != null && dependency.resolve(controller))
{
context.getDependencyInfo().addDependsOnMe(dependency);
co.getDependencyInfo().addIDependOn(dependency);
}
}
}
/**
* Create dependency - if it exists.
*
* @param owner if owner is controller context
* @return dependency or null if no such dependency exists
*/
protected DependencyItem createDependencyItem(ControllerContext owner)
{
return null;
}
public void changeCallback(Controller controller, ControllerContext context, boolean isInstallPhase) throws Throwable
{
super.changeCallback(controller, context, isInstallPhase);
addDependency(controller, context, isInstallPhase);
}
protected void toString(JBossStringBuilder buffer)
{
super.toString(buffer);
buffer.append(" owner=").append(owner);
}
}