/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.cassandra.io.compress;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Set;

public interface ICompressor
{
    public int initialCompressedBufferLength(int chunkLength);

    public int uncompress(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset) throws IOException;

    
Compression for ByteBuffers.
The data between input.position() and input.limit() is compressed and placed into output starting from output.position().
Positions in both buffers are moved to reflect the bytes read and written. Limits are not changed.
/**
     * Compression for ByteBuffers.
     *
     * The data between input.position() and input.limit() is compressed and placed into output starting from output.position().
     * Positions in both buffers are moved to reflect the bytes read and written. Limits are not changed.
     */
    public void compress(ByteBuffer input, ByteBuffer output) throws IOException;

    
Decompression for DirectByteBuffers.
The data between input.position() and input.limit() is uncompressed and placed into output starting from output.position().
Positions in both buffers are moved to reflect the bytes read and written. Limits are not changed.
/**
     * Decompression for DirectByteBuffers.
     *
     * The data between input.position() and input.limit() is uncompressed and placed into output starting from output.position().
     * Positions in both buffers are moved to reflect the bytes read and written. Limits are not changed.
     */
    public void uncompress(ByteBuffer input, ByteBuffer output) throws IOException;

    
Returns the preferred (most efficient) buffer type for this compressor.
/**
     * Returns the preferred (most efficient) buffer type for this compressor.
     */
    public BufferType preferredBufferType();

    
Checks if the given buffer would be supported by the compressor. If a type is supported, the compressor must be
able to use it in combination with all other supported types.
Direct and memory-mapped buffers must be supported by all compressors.
/**
     * Checks if the given buffer would be supported by the compressor. If a type is supported, the compressor must be
     * able to use it in combination with all other supported types.
     *
     * Direct and memory-mapped buffers must be supported by all compressors.
     */
    public boolean supports(BufferType bufferType);

    public Set<String> supportedOptions();
}