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org.apache.spark.sql.store

CompressionUtils

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object CompressionUtils

Utility methods for compression/decompression.

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  4. def acquireBufferForCompress(codecId: Int, input: ByteBuffer, len: Int, allocator: BufferAllocator): ByteBuffer

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  7. def codecCompress(codecId: Int, input: ByteBuffer, len: Int, result: ByteBuffer): ByteBuffer

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  8. def codecCompress(codec: CompressionCodec, input: Array[Byte], inputLen: Int): Array[Byte]

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  9. def codecDecompress(input: ByteBuffer, result: ByteBuffer, outputLen: Int, position: Int, codecId: Int): Unit

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  10. def codecDecompress(codec: CompressionCodec, input: Array[Byte], inputOffset: Int, inputLen: Int, outputLen: Int): Array[Byte]

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  11. def codecDecompressIfRequired(input: ByteBuffer, allocator: BufferAllocator): ByteBuffer

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    Decompress the given buffer if compressed else return the original.

    Decompress the given buffer if compressed else return the original. Input buffer must be little-endian and so will be the result.

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