/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.gatein.management.api.operation;
import org.gatein.management.api.binding.BindingException;
import org.gatein.management.api.binding.Marshaller;
import org.gatein.management.api.exceptions.OperationException;
import org.gatein.management.api.exceptions.ResourceNotFoundException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
/**
* @author <a href="mailto:nscavell@redhat.com">Nick Scavelli</a>
* @version $Revision$
*/
public abstract class UpdateOperationHandler<T> implements OperationHandler
{
@Override
public void execute(OperationContext operationContext, ResultHandler resultHandler) throws ResourceNotFoundException, OperationException
{
OperationAttachment attachment = operationContext.getAttachment(true);
Class<T> type = getParameterizedType();
Marshaller<T> marshaller = operationContext.getBindingProvider().getMarshaller(type, operationContext.getContentType());
if (marshaller == null)
{
throw new OperationException(operationContext.getOperationName(),
"No marshaller found for type " + type + " and content type " + operationContext.getContentType() +
" at address " + operationContext.getAddress());
}
try
{
execute(operationContext, marshaller.unmarshal(attachment.getStream()));
}
catch (BindingException e)
{
throw new OperationException(operationContext.getOperationName(),
"Exception unmarshalling data for type " + type + " and content type " + operationContext.getContentType() +
" at address " + operationContext.getAddress(), e);
}
}
protected abstract void execute(OperationContext operationContext, T data) throws ResourceNotFoundException, OperationException;
@SuppressWarnings("unchecked")
private Class<T> getParameterizedType()
{
Class<?> clazz = getClass();
while (clazz != UpdateOperationHandler.class)
{
Type t = clazz.getGenericSuperclass();
if (t instanceof ParameterizedType)
{
return (Class<T>) ((ParameterizedType) t).getActualTypeArguments()[0];
}
clazz = clazz.getSuperclass();
}
return null;
}
}