001: /*
002: * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/naming/factory/EjbFactory.java,v 1.6 2001/03/20 23:17:34 remm Exp $
003: * $Revision: 1.6 $
004: * $Date: 2001/03/20 23:17:34 $
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.InitialContext;
070: import javax.naming.NamingException;
071: import javax.naming.Reference;
072: import javax.naming.RefAddr;
073: import javax.naming.spi.ObjectFactory;
074: import org.apache.naming.EjbRef;
075:
076: /**
077: * Object factory for EJBs.
078: *
079: * @author Remy Maucherat
080: * @version $Revision: 1.6 $ $Date: 2001/03/20 23:17:34 $
081: */
082:
083: public class EjbFactory implements ObjectFactory {
084:
085: // ----------------------------------------------------------- Constructors
086:
087: // -------------------------------------------------------------- Constants
088:
089: // ----------------------------------------------------- Instance Variables
090:
091: // --------------------------------------------------------- Public Methods
092:
093: // -------------------------------------------------- ObjectFactory Methods
094:
095: /**
096: * Crete a new EJB instance.
097: *
098: * @param obj The reference object describing the DataSource
099: */
100: public Object getObjectInstance(Object obj, Name name,
101: Context nameCtx, Hashtable environment) throws Exception {
102:
103: if (obj instanceof EjbRef) {
104: Reference ref = (Reference) obj;
105:
106: // If ejb-link has been specified, resolving the link using JNDI
107: RefAddr linkRefAddr = ref.get(EjbRef.LINK);
108: if (linkRefAddr != null) {
109: // Retrieving the EJB link
110: String ejbLink = linkRefAddr.getContent().toString();
111: Object beanObj = (new InitialContext()).lookup(ejbLink);
112: // Load home interface and checking if bean correctly
113: // implements specified home interface
114: /*
115: String homeClassName = ref.getClassName();
116: try {
117: Class home = Class.forName(homeClassName);
118: if (home.isInstance(beanObj)) {
119: System.out.println("Bean of type "
120: + beanObj.getClass().getName()
121: + " implements home interface "
122: + home.getName());
123: } else {
124: System.out.println("Bean of type "
125: + beanObj.getClass().getName()
126: + " doesn't implement home interface "
127: + home.getName());
128: throw new NamingException
129: ("Bean of type " + beanObj.getClass().getName()
130: + " doesn't implement home interface "
131: + home.getName());
132: }
133: } catch (ClassNotFoundException e) {
134: System.out.println("Couldn't load home interface "
135: + homeClassName);
136: }
137: */
138: return beanObj;
139: }
140:
141: ObjectFactory factory = null;
142: RefAddr factoryRefAddr = ref.get(Constants.FACTORY);
143: if (factoryRefAddr != null) {
144: // Using the specified factory
145: String factoryClassName = factoryRefAddr.getContent()
146: .toString();
147: // Loading factory
148: ClassLoader tcl = Thread.currentThread()
149: .getContextClassLoader();
150: Class factoryClass = null;
151: if (tcl != null) {
152: try {
153: factoryClass = tcl.loadClass(factoryClassName);
154: } catch (ClassNotFoundException e) {
155: }
156: } else {
157: try {
158: factoryClass = Class.forName(factoryClassName);
159: } catch (ClassNotFoundException e) {
160: }
161: }
162: if (factoryClass != null) {
163: try {
164: factory = (ObjectFactory) factoryClass
165: .newInstance();
166: } catch (Throwable t) {
167: }
168: }
169: }
170:
171: // Note: No defaults here
172: if (factory != null) {
173: return factory.getObjectInstance(obj, name, nameCtx,
174: environment);
175: } else {
176: throw new NamingException(
177: "Cannot create resource instance");
178: }
179:
180: }
181:
182: return null;
183:
184: }
185:
186: }
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