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/*
* Oreka -- A media capture and retrieval platform
*
* Copyright (C) 2005, orecx LLC
*
* http://www.orecx.com
*
* This program is free software, distributed under the terms of
* the GNU General Public License.
* Please refer to http://www.gnu.org/copyleft/gpl.html
*
*/
package net.sf.oreka;
/**
* The ObjectFactory can be used to instanciate Objects based on class name.
* All existing Objects must be registered to the ObjectFactory at startup.
*/
public class OrkObjectFactory {
static OrkObjectFactory instance = null;
java.util.HashMap<String, OrkObject> classes;
private OrkObjectFactory()
{
classes = new java.util.HashMap<String, OrkObject>();
}
public static OrkObjectFactory instance()
{
if(instance == null)
{
instance = new OrkObjectFactory();
}
return instance;
}
public OrkObject newOrkObject(String className) throws OrkException
{
className = className.toLowerCase();
OrkObject classObject = classes.get(className);
OrkObject newInstance = null;
if(classObject != null)
{
try
{
newInstance = classObject.getClass().newInstance();
}
catch (Exception e)
{
throw new OrkException("OrkObjectFactory: Could not instanciate:" + className);
}
}
else
{
throw new OrkException("OrkObjectFactory: class does not exist:" + className);
}
return newInstance;
}
public void registerOrkObject(OrkObject object)
{
classes.put(object.getOrkClassName(), object);
}
}
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