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Compression algorithms

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/*
 * 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 io.airlift.compress.v2.zstd;

import io.airlift.compress.v2.hadoop.HadoopInputStream;

import java.io.IOException;
import java.io.InputStream;

import static java.util.Objects.requireNonNull;

class ZstdHadoopInputStream
        extends HadoopInputStream
{
    private final InputStream in;
    private ZstdInputStream zstdInputStream;

    public ZstdHadoopInputStream(InputStream in)
    {
        this.in = requireNonNull(in, "in is null");
        zstdInputStream = new ZstdInputStream(in);
    }

    @Override
    public int read()
            throws IOException
    {
        return zstdInputStream.read();
    }

    @Override
    public int read(byte[] b)
            throws IOException
    {
        return zstdInputStream.read(b);
    }

    @Override
    public int read(byte[] outputBuffer, int outputOffset, int outputLength)
            throws IOException
    {
        return zstdInputStream.read(outputBuffer, outputOffset, outputLength);
    }

    @Override
    public void resetState()
    {
        zstdInputStream = new ZstdInputStream(in);
    }

    @Override
    public void close()
            throws IOException
    {
        zstdInputStream.close();
    }
}