/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.wicket.request.flow;
import org.apache.wicket.request.ILogData;
import org.apache.wicket.request.ILoggableRequestHandler;
import org.apache.wicket.request.IRequestCycle;
import org.apache.wicket.request.IRequestHandler;
import org.apache.wicket.request.IRequestHandlerDelegate;
import org.apache.wicket.request.RequestHandlerStack.ReplaceHandlerException;
import org.apache.wicket.request.handler.logger.DelegateLogData;
import org.apache.wicket.request.handler.logger.NoLogData;
/**
* An exception that resets the response before executing the specified request handler
*
* @author Igor Vaynberg (ivaynberg)
* @author Jonathan Locke
*/
public abstract class ResetResponseException extends ReplaceHandlerException
{
private static final long serialVersionUID = 1L;
/**
* Construct.
*
* @param handler
*/
protected ResetResponseException(final IRequestHandler handler)
{
super(new ResponseResettingDecorator(handler), true);
}
private static class ResponseResettingDecorator
implements
IRequestHandler,
IRequestHandlerDelegate,
ILoggableRequestHandler
{
private final IRequestHandler delegate;
private DelegateLogData logData;
/**
* Construct.
*
* @param delegate
*/
public ResponseResettingDecorator(final IRequestHandler delegate)
{
this.delegate = delegate;
}
@Override
public void detach(final IRequestCycle requestCycle)
{
delegate.detach(requestCycle);
if (logData == null)
{
ILogData delegateData;
if (delegate instanceof ILoggableRequestHandler)
delegateData = ((ILoggableRequestHandler)delegate).getLogData();
else
delegateData = new NoLogData();
logData = new DelegateLogData(delegateData);
}
}
@Override
public void respond(final IRequestCycle requestCycle)
{
requestCycle.getResponse().reset();
delegate.respond(requestCycle);
}
@Override
public IRequestHandler getDelegateHandler()
{
return delegate;
}
/** {@inheritDoc} */
@Override
public DelegateLogData getLogData()
{
return logData;
}
}
}