/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, 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.jboss.ejb.plugins;
import org.jboss.invocation.Invocation;
import org.jboss.invocation.InvocationType;
import javax.ejb.TimerHandle;
/**
* This Interceptor validates the incomming arguments and the return value of the call.
*
* Here is the place where you want to make sure that local object don't pass through
* the remote interface.
*
* @author Thomas.Diesler@jboss.org
* @version $Revision: 81030 $
*/
public class CallValidationInterceptor
extends AbstractInterceptor
{
// Constants -----------------------------------------------------
// Attributes ----------------------------------------------------
// Static --------------------------------------------------------
// Constructors --------------------------------------------------
// Public --------------------------------------------------------
// Interceptor implementation --------------------------------------
public Object invokeHome(final Invocation mi) throws Exception
{
validateArguments(mi);
Object obj = getNext().invokeHome(mi);
return validateReturnValue(mi, obj);
}
public Object invoke(final Invocation mi) throws Exception
{
validateArguments(mi);
Object obj = getNext().invoke(mi);
return validateReturnValue(mi, obj);
}
/** Do some validation of the incoming parameters */
protected void validateArguments(Invocation mi)
{
if (mi.getType() == InvocationType.REMOTE)
{
Object[] params = mi.getArguments();
for (int i = 0; i < params.length; i++)
{
Object obj = params[i];
if (obj instanceof TimerHandle)
throw new IllegalArgumentException("Cannot pass TimerHandle through remote interface");
}
}
}
/** Do some validation of the return value */
protected Object validateReturnValue(Invocation mi, Object retValue)
{
if (mi.getType() == InvocationType.REMOTE)
{
if (retValue instanceof TimerHandle)
throw new IllegalArgumentException("Cannot return TimerHandle from remote interface");
}
return retValue;
}
}