resourcelinkfactory.java

来自「This temp directory is used by the JVM f」· Java 代码 · 共 155 行

/*
 * $Header: /home/cvs/jakarta-tomcat-catalina/catalina/src/share/org/apache/naming/factory/ResourceLinkFactory.java,v 1.2 2003/09/02 21:22:05 remm Exp $
 * $Revision: 1.2 $
 * $Date: 2003/09/02 21:22:05 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written 
 *    permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * [Additional notices, if required by prior licensing conditions]
 *
 */ 


package org.apache.naming.factory;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NamingException;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;

import org.apache.naming.ResourceLinkRef;


/**
 * <p>Object factory for resource links.</p>
 * 
 * @author Remy Maucherat
 * @version $Revision: 1.2 $ $Date: 2003/09/02 21:22:05 $
 */

public class ResourceLinkFactory
    implements ObjectFactory {


    // ----------------------------------------------------------- Constructors


    // ------------------------------------------------------- Static Variables


    /**
     * Global naming context.
     */
    private static Context globalContext = null;


    // --------------------------------------------------------- Public Methods


    /**
     * Set the global context (note: can only be used once).
     * 
     * @param newGlobalContext new global context value
     */
    public static void setGlobalContext(Context newGlobalContext) {
        if (globalContext != null)
            return;
        globalContext = newGlobalContext;
    }


    // -------------------------------------------------- ObjectFactory Methods


    /**
     * Create a new DataSource instance.
     * 
     * @param obj The reference object describing the DataSource
     */
    public Object getObjectInstance(Object obj, Name name, Context nameCtx,
                                    Hashtable environment)
        throws NamingException {
        
        if (!(obj instanceof ResourceLinkRef))
            return null;

        // Can we process this request?
        Reference ref = (Reference) obj;

        String type = ref.getClassName();

        // Read the global ref addr
        String globalName = null;
        RefAddr refAddr = ref.get(ResourceLinkRef.GLOBALNAME);
        if (refAddr != null) {
            globalName = refAddr.getContent().toString();
            Object result = null;
            result = globalContext.lookup(globalName);
            // FIXME: Check type
            return result;
        }

        return (null);

        
    }


}