/* $Id: ConfigurationFactory.java 17819 2010-01-12 18:40:41Z linus $
*****************************************************************************
* Copyright (c) 2009 Contributors - see below
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* linus
*****************************************************************************
*
* Some portions of this file was previously release using the BSD License:
*/
// Copyright (c) 1996-2007 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies. This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason. IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
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package org.argouml.configuration;
import org.apache.log4j.Logger;
/**
* A factory object that provides configuration information.
*
* @author Thierry Lach
* @since 0.9.4
*/
public class ConfigurationFactory implements IConfigurationFactory {
/**
* The only occurance of the configuration factory.
*/
private static final IConfigurationFactory SINGLETON;
/**
* The active configuration handler.
*/
private static ConfigurationHandler handler =
new ConfigurationProperties();
/**
* Initialize the factory singleton based on system
* property argo.ConfigurationFactory, or use the default
* if not set.
*/
static {
String name = System.getProperty("argo.ConfigurationFactory");
IConfigurationFactory newFactory = null;
if (name != null) {
try {
newFactory =
(IConfigurationFactory) Class.forName(name).newInstance();
} catch (Exception e) {
Logger.getLogger(ConfigurationFactory.class).
warn("Can't create configuration factory "
+ name + ", using default factory");
}
}
if (newFactory == null) {
newFactory = new ConfigurationFactory();
}
SINGLETON = newFactory;
}
/**
* Private constructor to not allow instantiation.
*/
private ConfigurationFactory() {
}
/**
* Returns the instance of the singleton.
*
* @return the only instance of the configuration factory.
*/
public static final IConfigurationFactory getInstance() {
return SINGLETON;
}
/**
* Returns the customized configuration for the user.
*
* @return a concrete class which extends ConfigurationHandler and
* can be used to access and manipulate the configuration.
*/
public ConfigurationHandler getConfigurationHandler() {
// TODO: Allow other configuration handlers.
return handler;
}
} /* end class ConfigurationFactory */