abstractnamespace.java

实现了Jms的服务器源码,支持多种适配器,DB,FTP,支持多种数据库

/*
 * Copyright (C) The Apache Software Foundation. All rights reserved.
 *
 * This software is published under the terms of the Apache Software License
 * version 1.1, a copy of which has been included with this distribution in
 * the LICENSE file.
 */
package org.apache.avalon.excalibur.naming;

import java.util.Hashtable;
import javax.naming.NameParser;
import javax.naming.Name;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.spi.InitialContextFactory;
import javax.naming.spi.ObjectFactory;
import javax.naming.spi.StateFactory;

/**
 * This is the class to extend that provides
 * basic facilities for Namespace management.
 *
 * @author <a href="mailto:[e-mail]">Peter Donald</a>
 * @version $Revision: 1.2 $
 */
public abstract class AbstractNamespace
    implements Namespace
{
    protected ObjectFactory[]        m_objectFactorySet;
    protected StateFactory[]         m_stateFactorySet;

    public Object getStateToBind( final Object object,
                                  final Name name,
                                  final Context parent,
                                  final Hashtable environment )
        throws NamingException
    {
        //for thread safety so that member variable can be updated
        //at any time
        final StateFactory[] stateFactorySet = m_stateFactorySet;

        for( int i = 0; i < stateFactorySet.length; i++ )
        {
            final Object result =
                stateFactorySet[ i ].getStateToBind( object, name, parent, environment );

            if( null != result )
            {
                return result;
            }
        }

        return object;
    }

    public Object getObjectInstance( final Object object,
                                     final Name name,
                                     final Context parent,
                                     final Hashtable environment )
        throws Exception
    {
        //for thread safety so that member variable can be updated
        //at any time
        final ObjectFactory[] objectFactorySet = m_objectFactorySet;

        for( int i = 0; i < objectFactorySet.length; i++ )
        {
            final Object result =
                objectFactorySet[ i ].getObjectInstance( object, name, parent, environment );

            if( null != result )
            {
                return result;
            }
        }

        return object;
    }
}