/*
* 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.markup.html.internal;
import org.apache.wicket.markup.MarkupStream;
import org.apache.wicket.request.Response;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.response.StringResponse;
/**
* Utility class that buffers output and maintains markup stream index
*
* @author igor.vaynberg
*/
public abstract class ResponseBufferZone
{
private final RequestCycle cycle;
private final MarkupStream stream;
public ResponseBufferZone(RequestCycle cycle, MarkupStream stream)
{
this.cycle = cycle;
this.stream = stream;
}
public CharSequence execute()
{
final int originalStreamPos = stream.getCurrentIndex();
final Response original = cycle.getResponse();
final StringResponse buffer = new StringResponse();
cycle.setResponse(buffer);
try
{
executeInsideBufferedZone();
return buffer.getBuffer();
}
finally
{
cycle.setResponse(original);
stream.setCurrentIndex(originalStreamPos);
}
}
protected abstract void executeInsideBufferedZone();
}