/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.transformer.compression;
import org.mule.api.transformer.TransformerException;
import org.mule.transformer.types.DataTypeFactory;
import org.mule.util.SerializationUtils;
import org.mule.util.compression.GZipCompression;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
/**
* <code>GZipCompressTransformer</code> is a transformer compressing objects into
* byte arrays.
*/
public class GZipCompressTransformer extends AbstractCompressionTransformer
{
public GZipCompressTransformer()
{
super();
this.setStrategy(new GZipCompression());
this.registerSourceType(DataTypeFactory.create(Serializable.class));
this.registerSourceType(DataTypeFactory.BYTE_ARRAY);
this.registerSourceType(DataTypeFactory.INPUT_STREAM);
// No type checking for the return type by default. It could either be a byte array or an input stream.
this.setReturnDataType(DataTypeFactory.OBJECT);
}
@Override
public Object doTransform(Object src, String outputEncoding) throws TransformerException
{
try
{
if (src instanceof InputStream)
{
return getStrategy().compressInputStream((InputStream) src);
}
else
{
byte[] data;
if (src instanceof byte[])
{
data = (byte[]) src;
}
else if (src instanceof String)
{
data = ((String) src).getBytes(outputEncoding);
}
else
{
data = SerializationUtils.serialize((Serializable) src);
}
return getStrategy().compressByteArray(data);
}
}
catch (IOException ioex)
{
throw new TransformerException(this, ioex);
}
}
}