/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common.compress.lzf;
import com.ning.compress.lzf.ChunkDecoder;
import com.ning.compress.lzf.LZFChunk;
import org.apache.lucene.store.BufferedIndexInput;
import org.apache.lucene.store.IndexInput;
import org.elasticsearch.common.compress.CompressedIndexInput;
import org.elasticsearch.common.lucene.store.InputStreamIndexInput;
import java.io.IOException;
import java.util.Arrays;
/**
*/
@Deprecated
public class LZFCompressedIndexInput extends CompressedIndexInput<LZFCompressorContext> {
private final ChunkDecoder decoder;
// scratch area buffer
private byte[] inputBuffer;
public LZFCompressedIndexInput(IndexInput in, ChunkDecoder decoder) throws IOException {
super(in, LZFCompressorContext.INSTANCE);
this.decoder = decoder;
this.uncompressed = new byte[LZFChunk.MAX_CHUNK_LEN];
this.uncompressedLength = LZFChunk.MAX_CHUNK_LEN;
this.inputBuffer = new byte[LZFChunk.MAX_CHUNK_LEN];
}
@Override
protected void readHeader(IndexInput in) throws IOException {
byte[] header = new byte[LZFCompressor.LUCENE_HEADER.length];
in.readBytes(header, 0, header.length, false);
if (!Arrays.equals(header, LZFCompressor.LUCENE_HEADER)) {
throw new IOException("wrong lzf compressed header [" + Arrays.toString(header) + "]");
}
}
@Override
protected int uncompress(IndexInput in, byte[] out) throws IOException {
return decoder.decodeChunk(new InputStreamIndexInput(in, Long.MAX_VALUE), inputBuffer, out);
}
@Override
protected void doClose() throws IOException {
// nothing to do here...
}
@Override
public IndexInput clone() {
LZFCompressedIndexInput cloned = (LZFCompressedIndexInput) super.clone();
cloned.inputBuffer = new byte[LZFChunk.MAX_CHUNK_LEN];
return cloned;
}
@Override
public IndexInput slice(String description, long offset, long length) throws IOException {
return BufferedIndexInput.wrap(description, this, offset, length);
}
}