/**
* 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 1999 (C) Intalio, Inc. All Rights Reserved.
*
* $Id: KeyGeneratorRegistry.java,v 1.1.1.1 2003/03/03 07:08:18 kvisco Exp $
*/
package org.exolab.castor.jdo.engine;
import java.util.Hashtable;
import org.exolab.castor.mapping.MappingException;
import org.exolab.castor.persist.KeyGeneratorFactoryRegistry;
import org.exolab.castor.persist.spi.KeyGenerator;
import org.exolab.castor.persist.spi.KeyGeneratorFactory;
import org.exolab.castor.persist.spi.LogInterceptor;
import org.exolab.castor.persist.spi.PersistenceFactory;
import org.exolab.castor.util.Logger;
import org.exolab.castor.util.Messages;
/**
* Registry for {@link KeyGenerator} instances.
* Is used to create no more than one instance of the give type with
* the given parameters.
*
* @author <a href="on@ibis.odessa.ua">Oleg Nitz</a>
* @version $Revision: 1.1.1.1 $ $Date: 2003/03/03 07:08:18 $
*/
final class KeyGeneratorRegistry
{
/**
* Association between key generator names (aliases) and instances.
*/
private Hashtable _keyGens = new Hashtable();
/**
* Returns a key generator with the specified description
* for the specified persistence factory.
*
* @param factory The persistence factory
* @param desc The key generator description
* @return The {@link KeyGenerator}
*/
public KeyGenerator getKeyGenerator( PersistenceFactory factory,
KeyGeneratorDescriptor desc,
int sqlType,
LogInterceptor logInterceptor )
throws MappingException
{
String keyGenName;
KeyGeneratorFactory keyGenFactory;
KeyGenerator keyGen;
keyGenName = desc.getName() + " " + sqlType;
keyGen = (KeyGenerator) _keyGens.get( keyGenName );
if ( keyGen == null ) {
keyGenFactory = KeyGeneratorFactoryRegistry.getKeyGeneratorFactory(
desc.getKeyGeneratorFactoryName() );
if (keyGenFactory != null) {
keyGen = keyGenFactory.getKeyGenerator( factory, desc.getParams(), sqlType );
if ( keyGen != null && logInterceptor != null ) {
logInterceptor.message( "Key generator " +
desc.getKeyGeneratorFactoryName() +
" has been instantiated, parameters: " +
desc.getParams() );
}
}
if ( keyGen == null ) {
/*
* Don't throw exception here, just notify and continue without
* key generator
*/
Logger.getSystemLogger().println( Messages.format(
"mapping.noKeyGen", desc.getKeyGeneratorFactoryName() ) );
return null;
}
_keyGens.put( keyGenName, keyGen );
}
return keyGen;
}
}