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/*******************************************************************************
 *
 *    Copyright (C) 2015-2018 the BBoxDB project
 *  
 *    Licensed 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.bboxdb.network.client.response;

import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;

import org.bboxdb.network.client.BBoxDBConnection;
import org.bboxdb.network.client.ServerResponseReader;
import org.bboxdb.network.client.future.NetworkOperationFuture;
import org.bboxdb.network.packages.PackageEncodeException;
import org.bboxdb.network.packages.response.CompressionEnvelopeResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class CompressionHandler implements ServerResponseHandler {

	/**
	 * The Logger
	 */
	private final static Logger logger = LoggerFactory.getLogger(CompressionHandler.class);

	/**
	 * Handle the compressed package
	 */
	@Override
	public boolean handleServerResult(final BBoxDBConnection bBoxDBConnection, 
			final ByteBuffer encodedPackage, final NetworkOperationFuture future)
			throws PackageEncodeException {
		
		if(logger.isDebugEnabled()) {
			logger.debug("Handle compression package");
		}
		
		final ServerResponseReader serverResponseReader = bBoxDBConnection.getServerResponseReader();
		final InputStream uncompressedStream = CompressionEnvelopeResponse.decodePackage(encodedPackage);
		
		try {
			while(uncompressedStream.available() > 0) {
				serverResponseReader.processNextResponsePackage(uncompressedStream);
			}
		} catch (IOException e) {
			logger.error("Got IO error while handling compressed packages", e);
		}
		
		// No real package id in compression envelope
		return false;
	}

}