001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/framework/jndi/JndiUtils.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.framework.jndi;
037
038 // J2EE 1.3
039
040 import javax.naming.Context;
041 import javax.naming.InitialContext;
042 import javax.naming.NamingEnumeration;
043 import javax.naming.NamingException;
044 import javax.rmi.PortableRemoteObject;
045
046 /**
047 * Utility class for retrieving home interfaces and environment values.
048 *
049 * @author <a href="mailto:tfr@users.sourceforge.net">Torsten Friebe</A>
050 * @author last edited by: $Author: mschneider $
051 *
052 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
053 */
054 public final class JndiUtils {
055
056 /**
057 * Default constructor is hidden to protect this class from unwanted instantiation.
058 */
059 private JndiUtils() {
060 // nothing to do
061 }
062
063 /**
064 * Lookup using <b>no</b> caching functionality.
065 *
066 * @param name
067 * the environment name
068 * @param classForNarrow
069 * the class to narrow
070 * @return if an entry exists, an instance of the given class with a value retrieved from the JNDI tree otherwise
071 * <code>null</code>.
072 * @throws NamingException
073 */
074 public static Object lookup( String name, Class<?> classForNarrow )
075 throws NamingException {
076 return PortableRemoteObject.narrow( JndiUtils.getInitialContext().lookup( name ), classForNarrow );
077 }
078
079 /**
080 * Lookup at Enterprise Java Beans environment value. For home interfaces use EJBRemoteFactory instead.
081 *
082 * @param name
083 * the environment name
084 * @param classForNarrow
085 * the class to narrow
086 * @return if an entry exists, an instance of the given class with a value retrieved from the JNDI tree otherwise
087 * <code>null</code>.
088 * @throws NamingException
089 * if the given lookup name is not in the JNDI tree
090 */
091 public static Object lookupEnv( String name, Class<?> classForNarrow )
092 throws NamingException {
093 return lookup( "java:/comp/env/" + name, classForNarrow );
094 }
095
096 /**
097 * Returns a list of naming entries for the given root node.
098 *
099 * @param rootNode
100 * @return list of naming entries
101 * @throws NamingException
102 * when the given root node doesn't exists
103 */
104 public static NamingEnumeration<?> getNamingList( String rootNode )
105 throws NamingException {
106 return JndiUtils.getInitialContext().listBindings( rootNode );
107 }
108
109 /**
110 * Returns the initial context for this application.
111 *
112 * @return the inital context for this appication. This depends on the system environment.
113 *
114 * @throws NamingException
115 * if the context is not available
116 */
117 private static Context getInitialContext()
118 throws NamingException {
119 return ( new InitialContext() );
120 }
121 }