Source Code Cross Referenced for URLFactory.java in  » J2EE » JOnAS-4.8.6 » org » objectweb » jonas_lib » naming » factory » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » JOnAS 4.8.6 » org.objectweb.jonas_lib.naming.factory 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /**
02:         * JOnAS: Java(TM) Open Application Server
03:         * Copyright (C) 1999 Bull S.A.
04:         * Contact: jonas-team@objectweb.org
05:         *
06:         * This library is free software; you can redistribute it and/or
07:         * modify it under the terms of the GNU Lesser General Public
08:         * License as published by the Free Software Foundation; either
09:         * version 2.1 of the License, or any later version.
10:         *
11:         * This library is distributed in the hope that it will be useful,
12:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
13:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14:         * Lesser General Public License for more details.
15:         *
16:         * You should have received a copy of the GNU Lesser General Public
17:         * License along with this library; if not, write to the Free Software
18:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
19:         * USA
20:         *
21:         * Initial developer(s): Florent BENOIT
22:         * --------------------------------------------------------------------------
23:         * $Id: URLFactory.java 4718 2004-05-10 12:06:09Z sauthieg $
24:         * --------------------------------------------------------------------------
25:         */package org.objectweb.jonas_lib.naming.factory;
26:
27:        //import java
28:        import java.net.URL;
29:        import java.util.Hashtable;
30:
31:        //import javax
32:        import javax.naming.Context;
33:        import javax.naming.Name;
34:        import javax.naming.Reference;
35:        import javax.naming.spi.ObjectFactory;
36:
37:        /**
38:         * This class provides an implementation of a mail session factory for
39:         * sending mail.
40:         * @author Florent Benoit
41:         */
42:        public class URLFactory implements  ObjectFactory {
43:
44:            /**
45:             * The Java type for which this factory knows how to create objects.
46:             */
47:            protected static final String FACTORY_TYPE = "java.net.URL";
48:
49:            /**
50:             * Creates a java.net.URL object using the location or reference
51:             * information specified.
52:             * @param obj the possibly null object containing location or reference
53:             * information that can be used in creating an object.
54:             * @param name the name of this object relative to nameCtx, or null if no
55:             * name is specified.
56:             * @param nameCtx the context relative to which the name parameter is
57:             * specified, or null if name is relative to the default initial context.
58:             * @param environment the possibly null environment that is used in
59:             * creating the object.
60:             * @return a newly created java.net.URL object with the specific
61:             * configuration; null if an object cannot be created.
62:             * @throws Exception if this object factory encountered an exception
63:             * while attempting to create an object, and no other object factories
64:             * are to be tried.
65:             */
66:            public Object getObjectInstance(Object obj, Name name,
67:                    Context nameCtx, Hashtable environment) throws Exception {
68:
69:                //Get the reference
70:                Reference ref = (Reference) obj;
71:
72:                //Get the class name
73:                String clname = ref.getClassName();
74:
75:                //Check the class name
76:                if (!ref.getClassName().equals(FACTORY_TYPE)) {
77:                    throw new Exception(
78:                            "Can not create object : required type is '"
79:                                    + FACTORY_TYPE + "', but found type is '"
80:                                    + clname + "'.");
81:                }
82:
83:                URL url = null;
84:                String urlString = (String) ref.get("url").getContent();
85:
86:                if (urlString != null) {
87:                    url = new URL(urlString);
88:                } else {
89:                    throw new Exception(
90:                            "Can not build an object as no URL was given.");
91:                }
92:
93:                return url;
94:            }
95:
96:        }
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