/**
* 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.camel.impl;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;
import org.apache.camel.Exchange;
import org.apache.camel.converter.IOConverter;
import org.apache.camel.spi.DataFormat;
import org.apache.camel.util.ExchangeHelper;
public class ZipDataFormat implements DataFormat {
private int compressionLevel;
public ZipDataFormat() {
this.compressionLevel = Deflater.BEST_SPEED;
}
public ZipDataFormat(int compressionLevel) {
this.compressionLevel = compressionLevel;
}
public void marshal(Exchange exchange, Object graph, OutputStream stream)
throws Exception {
InputStream is = exchange.getContext().getTypeConverter().convertTo(InputStream.class, graph);
if (is == null) {
throw new IllegalArgumentException("Cannot get the inputstream for ZipDataFormat mashalling");
}
DeflaterOutputStream zipOutput = new DeflaterOutputStream(stream, new Deflater(compressionLevel));
try {
IOConverter.copy(is, zipOutput);
} finally {
zipOutput.close();
}
}
public Object unmarshal(Exchange exchange, InputStream stream)
throws Exception {
InputStream is = ExchangeHelper.getMandatoryInBody(exchange, InputStream.class);
InflaterInputStream unzipInput = new InflaterInputStream(is);
// Create an expandable byte array to hold the inflated data
ByteArrayOutputStream bos = new ByteArrayOutputStream();
IOConverter.copy(unzipInput, bos);
return bos.toByteArray();
}
}