001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/naming/factory/ResourceLinkFactory.java,v 1.3 2001/11/10 00:28:39 remm Exp $
003: * $Revision: 1.3 $
004: * $Date: 2001/11/10 00:28:39 $
005: *
006: * ====================================================================
007: *
008: * The Apache Software License, Version 1.1
009: *
010: * Copyright (c) 1999 The Apache Software Foundation. All rights
011: * reserved.
012: *
013: * Redistribution and use in source and binary forms, with or without
014: * modification, are permitted provided that the following conditions
015: * are met:
016: *
017: * 1. Redistributions of source code must retain the above copyright
018: * notice, this list of conditions and the following disclaimer.
019: *
020: * 2. Redistributions in binary form must reproduce the above copyright
021: * notice, this list of conditions and the following disclaimer in
022: * the documentation and/or other materials provided with the
023: * distribution.
024: *
025: * 3. The end-user documentation included with the redistribution, if
026: * any, must include the following acknowlegement:
027: * "This product includes software developed by the
028: * Apache Software Foundation (http://www.apache.org/)."
029: * Alternately, this acknowlegement may appear in the software itself,
030: * if and wherever such third-party acknowlegements normally appear.
031: *
032: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
033: * Foundation" must not be used to endorse or promote products derived
034: * from this software without prior written permission. For written
035: * permission, please contact apache@apache.org.
036: *
037: * 5. Products derived from this software may not be called "Apache"
038: * nor may "Apache" appear in their names without prior written
039: * permission of the Apache Group.
040: *
041: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
042: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
043: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
044: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
045: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
046: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
047: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
048: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
049: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
050: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
051: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
052: * SUCH DAMAGE.
053: * ====================================================================
054: *
055: * This software consists of voluntary contributions made by many
056: * individuals on behalf of the Apache Software Foundation. For more
057: * information on the Apache Software Foundation, please see
058: * <http://www.apache.org/>.
059: *
060: * [Additional notices, if required by prior licensing conditions]
061: *
062: */
063:
064: package org.apache.naming.factory;
065:
066: import java.util.Hashtable;
067: import java.sql.Driver;
068: import java.sql.DriverManager;
069: import javax.naming.Name;
070: import javax.naming.Context;
071: import javax.naming.NamingException;
072: import javax.naming.Reference;
073: import javax.naming.RefAddr;
074: import javax.naming.spi.ObjectFactory;
075: import org.apache.naming.ResourceLinkRef;
076:
077: /**
078: * <p>Object factory for resource links.</p>
079: *
080: * @author Remy Maucherat
081: * @version $Revision: 1.3 $ $Date: 2001/11/10 00:28:39 $
082: */
083:
084: public class ResourceLinkFactory implements ObjectFactory {
085:
086: // ----------------------------------------------------------- Constructors
087:
088: // ------------------------------------------------------- Static Variables
089:
090: /**
091: * Global naming context.
092: */
093: private static Context globalContext = null;
094:
095: // --------------------------------------------------------- Public Methods
096:
097: /**
098: * Set the global context (note: can only be used once).
099: *
100: * @param newGlobalContext new global context value
101: */
102: public static void setGlobalContext(Context newGlobalContext) {
103: if (globalContext != null)
104: return;
105: globalContext = newGlobalContext;
106: }
107:
108: // -------------------------------------------------- ObjectFactory Methods
109:
110: /**
111: * Create a new DataSource instance.
112: *
113: * @param obj The reference object describing the DataSource
114: */
115: public Object getObjectInstance(Object obj, Name name,
116: Context nameCtx, Hashtable environment)
117: throws NamingException {
118:
119: if (!(obj instanceof ResourceLinkRef))
120: return null;
121:
122: // Can we process this request?
123: Reference ref = (Reference) obj;
124:
125: String type = ref.getClassName();
126:
127: // Read the global ref addr
128: String globalName = null;
129: RefAddr refAddr = ref.get(ResourceLinkRef.GLOBALNAME);
130: if (refAddr != null) {
131: globalName = refAddr.getContent().toString();
132: Object result = null;
133: result = globalContext.lookup(globalName);
134: // FIXME: Check type
135: return result;
136: }
137:
138: return (null);
139:
140: }
141:
142: }
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