001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/naming/factory/ResourceEnvFactory.java,v 1.2 2001/01/23 03:43:54 remm Exp $
003: * $Revision: 1.2 $
004: * $Date: 2001/01/23 03:43:54 $
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 javax.naming.Name;
068: import javax.naming.Context;
069: import javax.naming.NamingException;
070: import javax.naming.Reference;
071: import javax.naming.RefAddr;
072: import javax.naming.spi.ObjectFactory;
073: import org.apache.naming.ResourceEnvRef;
074:
075: /**
076: * Object factory for Resources env.
077: *
078: * @author Remy Maucherat
079: * @version $Revision: 1.2 $ $Date: 2001/01/23 03:43:54 $
080: */
081:
082: public class ResourceEnvFactory implements ObjectFactory {
083:
084: // ----------------------------------------------------------- Constructors
085:
086: // -------------------------------------------------------------- Constants
087:
088: // ----------------------------------------------------- Instance Variables
089:
090: // --------------------------------------------------------- Public Methods
091:
092: // -------------------------------------------------- ObjectFactory Methods
093:
094: /**
095: * Crete a new Resource env instance.
096: *
097: * @param obj The reference object describing the DataSource
098: */
099: public Object getObjectInstance(Object obj, Name name,
100: Context nameCtx, Hashtable environment) throws Exception {
101:
102: if (obj instanceof ResourceEnvRef) {
103: Reference ref = (Reference) obj;
104: ObjectFactory factory = null;
105: RefAddr factoryRefAddr = ref.get(Constants.FACTORY);
106: if (factoryRefAddr != null) {
107: // Using the specified factory
108: String factoryClassName = factoryRefAddr.getContent()
109: .toString();
110: // Loading factory
111: ClassLoader tcl = Thread.currentThread()
112: .getContextClassLoader();
113: Class factoryClass = null;
114: if (tcl != null) {
115: try {
116: factoryClass = tcl.loadClass(factoryClassName);
117: } catch (ClassNotFoundException e) {
118: }
119: } else {
120: try {
121: factoryClass = Class.forName(factoryClassName);
122: } catch (ClassNotFoundException e) {
123: }
124: }
125: if (factoryClass != null) {
126: try {
127: factory = (ObjectFactory) factoryClass
128: .newInstance();
129: } catch (Throwable t) {
130: }
131: }
132: }
133: // Note: No defaults here
134: if (factory != null) {
135: return factory.getObjectInstance(obj, name, nameCtx,
136: environment);
137: } else {
138: throw new NamingException(
139: "Cannot create resource instance");
140: }
141: }
142:
143: return null;
144:
145: }
146:
147: }
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