Subversion Repositories bacoAlunos

/*
BERSERK - a BusinEss Runtime and SEcurity Resources Kit
Copyright (C) 2003 Goncalo Luiz

This library 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 library 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 library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

To contact Goncalo Luiz use the following e-mail address (use an @ instead of the _):
gedl_mega.ist.utl.pt
*/
/*
 * @author Goncalo Luiz gedl [AT] rnl [DOT] ist [DOT] utl [DOT] pt
 *
 *
 * Created at 19/Out/2003 , 16:43:49
 *
 */
package pt.utl.ist.berserk.storage.digester;
import pt.utl.ist.berserk.storage.IStorageBroker;
import pt.utl.ist.berserk.storage.digester.filterManager.FilterChainDigester;
import pt.utl.ist.berserk.storage.digester.filterManager.FilterDefinitionDigester;
import pt.utl.ist.berserk.storage.digester.serviceManager.ServiceDefinitionDigester;
import pt.utl.ist.berserk.storage.filterManager.IPersistentFilterChain;
import pt.utl.ist.berserk.storage.filterManager.IPersistentFilterDefinition;
import pt.utl.ist.berserk.storage.serviceManager.IPersistentServiceDefinition;
/**
 * Creates a storage broker based on Apache Commons-Digester.<br/>
 * Please refer to BERSERK's manual for details.<br/>
 * @author Goncalo Luiz gedl [AT] rnl [DOT] ist [DOT] utl [DOT] pt
 *
 *
 * Created at 19/Out/2003 , 16:43:49
 *
 */
public class StorageBrokerDigester implements IStorageBroker
{
        private static StorageBrokerDigester instance = null;
        private StorageBrokerDigester()
        {
        }
        /**
         * Accesses the singleton instance for <code>StorageBrokerDigester</code>. If this is the first access
         * a new instance is created.
         * @return the singleton instance for <code>StorageBrokerDigester</code>
         * @see #resetInstance()
         */
        public static synchronized StorageBrokerDigester getInstance()
        {
                if (instance == null)
                {
                        instance = new StorageBrokerDigester();
                }
                return instance;
        }
        /**
         * Sets the instance to null. A subsquent access to <code>getInstance</code> creates a new
         * unique instance for <code>StorageBrokerDigester</code>
         *@see #getInstance()
         */
        public static synchronized void resetInstance()
        {
                instance = null;
        }
        /**
         * Gets a  DAO (Data Access Object) for filter configurations
         * @return the DAO (Data Access Object) for filter configurations
         */
        public IPersistentFilterDefinition getIPersistentFilterDefinition()
        {
                return new FilterDefinitionDigester();
        }
        /**
         * Gets a  DAO (Data Access Object) for services configurations
         * @return the DAO (Data Access Object) for services configurations
         */    
        public IPersistentServiceDefinition getIPersistentServiceDefinition()
        {
                return new ServiceDefinitionDigester();
        }
        /**
         * Gets a  DAO (Data Access Object) for filter chain configurations
         * @return the DAO (Data Access Object) for filter chain configurations
         */    
        public IPersistentFilterChain getIPersistentFilterChain()
        {
                return new FilterChainDigester();
        }
}