001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/framework/jndi/JndiUtils.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53115 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042
043 ---------------------------------------------------------------------------*/
044 package org.deegree.framework.jndi;
045
046 // J2EE 1.3
047
048 import javax.naming.Context;
049 import javax.naming.InitialContext;
050 import javax.naming.NamingEnumeration;
051 import javax.naming.NamingException;
052 import javax.rmi.PortableRemoteObject;
053
054
055
056 /**
057 * Utility class for retrieving home interfaces and environment values.
058 *
059 *
060 * @author <a href="mailto:tfr@users.sourceforge.net">Torsten Friebe</A>
061 * @author last edited by: $Author: apoth $
062 *
063 * @version $Revision: 9339 $, $Date: 2007-12-27 13:31:52 +0100 (Do, 27 Dez 2007) $
064 */
065 public final class JndiUtils {
066
067 /**
068 * Default constructor is hidden to protect this class for unwanted instantiation.
069 */
070 private JndiUtils() {}
071
072 /**
073 * Lookup using <b>no</b> caching functionality.
074 *
075 * @param name
076 * @param classForNarrow
077 *
078 * @return
079 *
080 * @throws NamingException
081 */
082 public static Object lookup(String name, Class classForNarrow)
083 throws NamingException
084 {
085 return PortableRemoteObject.narrow( JndiUtils.getInitialContext().lookup( name ),
086 classForNarrow );
087 }
088
089 /**
090 * Lookup at Enterprise Java Beans environment value.
091 * For home interfaces use EJBRemoteFactory instead
092 *
093 * @param name the environment name
094 * @param classForNarrow the class to narrow
095 *
096 * @return if an entry exists, an instance of the given class
097 * with a value retrieved from the JNDI tree otherwise
098 * <code>null</code>.
099 *
100 * @throws NamingException if the given lookup name is not in the JNDI tree
101 *
102 *
103 */
104 public static Object lookupEnv( String name, Class classForNarrow )
105 throws NamingException
106 {
107 return lookup("java:/comp/env/" + name, classForNarrow);
108 }
109
110 /**
111 * Returns a list of naming entries for the given root node.
112 * @param rootNode
113 *
114 * @return list of naming entries
115 *
116 * @throws NamingException when the given root node doesn't exists
117 */
118 public static NamingEnumeration getNamingList(String rootNode)
119 throws NamingException
120 {
121 return JndiUtils.getInitialContext().listBindings( rootNode );
122 }
123
124 /**
125 * Returns the initial context for this application.
126 *
127 * @return the inital context for this appication. This depends on the
128 * system environment.
129 *
130 * @throws NamingException if the context is not available
131 */
132 private static Context getInitialContext() throws NamingException
133 {
134 return ( new InitialContext() );
135 }
136
137 }