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/*
* 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.graph;

import org.jboss.dependency.plugins.AbstractController;
import org.jboss.dependency.spi.ControllerContext;
import org.jboss.dependency.spi.ControllerState;

/**
 * Check parent.
 * Return null if there is no parent.
 *
 * @author Ales Justin
 */
public class ParentLookupStrategy extends AbstractLookupStrategy
{
   protected ControllerContext getContextInternal(AbstractController controller, Object name, ControllerState state)
   {
      AbstractController parent = controller.getParentController();
      if (parent != null)
         return parent.getContext(name, state);
      else
         return null;
   }
}