/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Intalio, Inc. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Intalio, Inc. Exolab is a registered
* trademark of Intalio, Inc.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* INTALIO, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2002 (C) Intalio, Inc. All Rights Reserved.
*
* $Id$
*/
package org.exolab.castor.mapping.handlers;
import org.exolab.castor.mapping.MapHandler;
/**
* A Map handler for adding and retreiving key-value pairs from
* A map. A map handler is instantiated only once, must be thread
* safe and not use any synchronization.
*
* @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
* @version $Revision$ $Date: 2005-03-05 06:42:06 -0700 (Sat, 05 Mar 2005) $
*/
public final class MapHandlers {
private static final String J2MAP_CLASSNAME = "java.util.Map";
private static final String J2MAP_HANDLER_CLASSNAME
= "org.exolab.castor.mapping.handlers.J2MapHandler";
private static final MapHandler HASHTABLE_HANDLER = new J1MapHandler();
private static MapHandler _anymapHandler;
private static Class _j2mapClass = null;
static {
if (_j2mapClass == null) {
try {
ClassLoader loader = MapHandlers.class.getClassLoader();
if (loader != null) {
_j2mapClass = loader.loadClass(J2MAP_CLASSNAME);
} else {
_j2mapClass = Class.forName(J2MAP_CLASSNAME);
}
Class handler = Class.forName(J2MAP_HANDLER_CLASSNAME);
_anymapHandler = (MapHandler) handler.newInstance();
} catch (ClassNotFoundException cnfe) {
//-- Probably JDK 1.1 only
} catch(InstantiationException ie) {
//-- Probably shouldn't be here, but ignore
//-- and only JDK 1.1 will be supported.
} catch(IllegalAccessException iae) {
//-- Probably shouldn't be here, but ignore
//-- and only JDK 1.1 will be supported.
}
}
}
public static MapHandler getHandler(Object object) {
if (object == null) return null;
return getHandler(object.getClass());
} //-- getHandler
public static MapHandler getHandler(Class clazz) {
if (clazz == null) return null;
if (java.util.Hashtable.class.isAssignableFrom(clazz))
return HASHTABLE_HANDLER;
if (_j2mapClass != null) {
if (_j2mapClass.isAssignableFrom(clazz))
return _anymapHandler;
}
return null;
} //-- getHandler
} //-- MapHandlers