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 * JBoss, a division of Red Hat                                               *
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 * 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           *
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 * 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         *
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package org.gatein.pc.portlet.container.managed;

import java.util.Collection;

/**
 * @author <a href="mailto:julien@jboss.org">Julien Viet</a>
 * @author <a href="mailto:theute@jboss.org">Thomas Heute</a>
 * @version $Revision: 6699 $
 */
public interface PortletApplicationRegistry
{

   /**
    * Return an immutable list all the known portlet application in the registry.
    *
    * @return the registered portlet applications
    */
   Collection<? extends ManagedPortletApplication> getManagedPortletApplications();

   /**
    * Return a portlet app using its id or null if it does not exist.
    *
    * @param id the portlet application id 
    * @return a specified registered portlet application
    */
   ManagedPortletApplication getManagedPortletApplication(String id);

   void addListener(ManagedObjectRegistryEventListener listener);

   void removeListener(ManagedObjectRegistryEventListener listener);

}
