org.elasticsearch.common.compress.snappy.SnappyCompressedIndexInput Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of org.apache.servicemix.bundles.elasticsearch

This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.

There is a newer version: 7.10.2_1

Show newest version

/*
 * Licensed to ElasticSearch and Shay Banon 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.snappy;

import org.apache.lucene.store.IndexInput;
import org.elasticsearch.common.compress.CompressedIndexInput;

import java.io.IOException;
import java.util.Arrays;

/**
 */
public abstract class SnappyCompressedIndexInput extends CompressedIndexInput {

    protected int chunkSize;

    protected int maxCompressedChunkLength;

    protected byte[] inputBuffer;

    public SnappyCompressedIndexInput(IndexInput in, SnappyCompressorContext context) throws IOException {
        super(in, context);
        this.uncompressed = new byte[chunkSize];
        this.uncompressedLength = chunkSize;
        this.inputBuffer = new byte[Math.max(chunkSize, maxCompressedChunkLength)];
    }

    @Override
    protected void readHeader(IndexInput in) throws IOException {
        byte[] header = new byte[SnappyCompressor.HEADER.length];
        in.readBytes(header, 0, header.length);
        if (!Arrays.equals(header, SnappyCompressor.HEADER)) {
            throw new IOException("wrong snappy compressed header [" + Arrays.toString(header) + "]");
        }
        this.chunkSize = in.readVInt();
        this.maxCompressedChunkLength = in.readVInt();
    }

    @Override
    protected void doClose() throws IOException {
        // nothing to do here
    }

    @Override
    public Object clone() {
        SnappyCompressedIndexInput cloned = (SnappyCompressedIndexInput) super.clone();
        cloned.inputBuffer = new byte[inputBuffer.length];
        return cloned;
    }
}