appserver/web/web-naming/src/main/java/org/apache/naming/factory/ResourceLinkFactory.java

/*
 * Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved.
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.naming.factory;

import java.util.Hashtable;
import java.sql.Driver;
import java.sql.DriverManager;
import javax.naming.Name;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.Reference;
import javax.naming.RefAddr;
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: 2005/12/08 01:29:07 $
 */

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;
        SecurityManager securityManager = System.getSecurityManager();
        if (securityManager != null) {
            securityManager.checkPermission(new RuntimePermission(
                    ResourceLinkFactory.class.getName() + ".setGlobalContext"));
        }
        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;

        // 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);


    }


}