/**
* 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 1999-2002 (C) Intalio, Inc. All Rights Reserved.
*
* $Id: KeyGeneratorFactoryRegistry.java 8034 2009-01-26 00:59:04Z rjoachim $
*/
package org.exolab.castor.persist;
import java.util.Enumeration;
import java.util.Hashtable;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.castor.core.util.AbstractProperties;
import org.castor.cpa.CPAProperties;
import org.exolab.castor.persist.spi.KeyGeneratorFactory;
/**
* Registry for {@link KeyGeneratorFactory} implementations
* obtained from the Castor properties file and used by the
* JDO mapping configuration file.
*
* @author <a href="on@ibis.odessa.ua">Oleg Nitz</a>
* @version $Revision: 8034 $ $Date: 2006-04-10 16:39:24 -0600 (Mon, 10 Apr 2006) $
*/
public final class KeyGeneratorFactoryRegistry {
/**
* Association between key generator name and {@link KeyGeneratorFactory} instances.
*/
private static Hashtable _factories = new Hashtable();
/**
* Returns a key generator factory with the specified name.
* The factory class names are loaded from the Castor properties
* file. Returns null if the named factory is not supported.
*
* @param name The key generator name
* @return The {@link KeyGeneratorFactory}, null
* if no key generator factory with this name exists
*/
public static KeyGeneratorFactory getKeyGeneratorFactory(final String name) {
load();
return (KeyGeneratorFactory) _factories.get(name);
}
/**
* Returns the names of all the configured key generator factories
* The names can be used to obtain a key generator factory
* from {@link #getKeyGeneratorFactory}.
*
* @return Names of key generator factories
*/
public static String[] getKeyGeneratorFactoryNames() {
load();
String[] names = new String[_factories.size()];
Enumeration enumeration = _factories.keys();
for (int i = 0; i < names.length; ++i) {
names[i] = (String) enumeration.nextElement();
}
return names;
}
/**
* Load the key generators from the properties file, if not loaded before.
*/
private static synchronized void load() {
if (_factories.isEmpty()) {
AbstractProperties properties = CPAProperties.getInstance();
Object[] objects = properties.getObjectArray(
CPAProperties.KEYGENERATOR_FACTORIES,
properties.getApplicationClassLoader());
for (int i = 0; i < objects.length; i++) {
KeyGeneratorFactory factory = (KeyGeneratorFactory) objects[i];
_factories.put(factory.getName(), factory);
}
}
}
/**
* Hide Utility Class Constructor.
*/
private KeyGeneratorFactoryRegistry() { }
}