com.hpe.caf.codec.JsonLzfCodec Maven / Gradle / Ivy
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/*
* Copyright 2015-2024 Open Text.
*
* 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 com.hpe.caf.codec;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.hpe.caf.api.Codec;
import com.hpe.caf.api.CodecException;
import com.hpe.caf.api.DecodeMethod;
import com.ning.compress.lzf.LZFInputStream;
import com.ning.compress.lzf.LZFOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* Implementation of Codec that supports serialisation and deserialisation to and form JSON format that itself is compressed with a
* high-speed LZF algorithm. In some crude tests, this was resulting in data that was approximately 60% of the original JSON size with
* negligible performance impact.
*/
public class JsonLzfCodec implements Codec
{
private final ObjectMapper strictMapper;
private final ObjectMapper lenientMapper;
public JsonLzfCodec()
{
strictMapper = ObjectMapperFactory.getStrictMapper();
lenientMapper = ObjectMapperFactory.getLenientMapper();
}
@Override
public T deserialise(final byte[] data, final Class clazz, final DecodeMethod method)
throws CodecException
{
try (ByteArrayInputStream bis = new ByteArrayInputStream(data);
LZFInputStream lzf = new LZFInputStream(bis)) {
return getMapper(method).readValue(lzf, clazz);
} catch (final IOException e) {
throw new CodecException("Failed to deserialise", e);
}
}
@Override
public T deserialise(final InputStream stream, final Class clazz, final DecodeMethod method)
throws CodecException
{
try (LZFInputStream lzf = new LZFInputStream(stream)) {
return getMapper(method).readValue(lzf, clazz);
} catch (final IOException e) {
throw new CodecException("Failed to deserialise", e);
}
}
@Override
public byte[] serialise(final Object object)
throws CodecException
{
try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
LZFOutputStream lzf = new LZFOutputStream(bos)) {
getMapper(DecodeMethod.getDefault()).writeValue(lzf, object);
return bos.toByteArray();
} catch (final IOException e) {
throw new CodecException("Failed to serialise", e);
}
}
protected ObjectMapper getMapper(final DecodeMethod method)
{
return method == DecodeMethod.STRICT ? strictMapper : lenientMapper;
}
}