/*
* Copyright (C) 2007 Rob Manning
* manningr@users.sourceforge.net
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package net.sourceforge.squirrel_sql.client.update.xmlbeans;
import java.beans.BeanInfo;
import java.beans.DefaultPersistenceDelegate;
import java.beans.Encoder;
import java.beans.Expression;
import java.beans.IntrospectionException;
import java.beans.Introspector;
@SuppressWarnings("unchecked")
public class EnumPersistenceDelegate extends DefaultPersistenceDelegate {
private static EnumPersistenceDelegate INSTANCE = new EnumPersistenceDelegate();
public static void installFor(Enum<?>[] values) {
Class<? extends Enum> declaringClass = values[0].getDeclaringClass();
installFor(declaringClass);
for (Enum<?> e : values)
if (e.getClass() != declaringClass)
installFor(e.getClass());
}
public static void installFor(Class<? extends Enum> enumClass) {
try {
BeanInfo info = Introspector.getBeanInfo( enumClass );
info.getBeanDescriptor().setValue( "persistenceDelegate", INSTANCE );
} catch( IntrospectionException exception ) {
throw new RuntimeException("Unable to persist enumerated type "+enumClass, exception);
}
}
protected Expression instantiate(Object oldInstance, Encoder out) {
Enum e = (Enum)oldInstance;
return new Expression(Enum.class,
"valueOf",
new Object[] { e.getDeclaringClass(),
e.name() });
}
}