src/main/java/org/apache/sling/scripting/xproc/cocoon/generator/SlingGeneratorServletResponse.java

/*
 * 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.sling.scripting.xproc.cocoon.generator;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletOutputStream;

import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.wrappers.SlingHttpServletResponseWrapper;

public class SlingGeneratorServletResponse extends SlingHttpServletResponseWrapper
										   implements SlingHttpServletResponse {

	private SlingGeneratorServletOutputStream output;

	private boolean hasWriter = false;
	private boolean hasOutputStream  = false;

	public SlingGeneratorServletResponse(SlingHttpServletResponse wrappedResponse,
			SlingGeneratorServletOutputStream output) {
		super(wrappedResponse);
		this.output = output;
	}

	@Override
	public PrintWriter getWriter() throws IOException {
		if (this.hasOutputStream) {
			throw new IllegalStateException("getOutputStream was already called.");
		}
		this.hasWriter = true;
		return this.output.getWriter();
	}

	@Override
	public ServletOutputStream getOutputStream() throws IOException {
		if (this.hasWriter) {
			throw new IllegalStateException("getWriter was already called.");
		}
		this.hasOutputStream = true;
		return this.output;
	}

	@Override
	public int getBufferSize() {
		return 1024;
	}

}