org.apache.hive.orc

Interface CompressionCodec

All Known Subinterfaces:

DirectDecompressionCodec

All Known Implementing Classes:

SnappyCodec, ZlibCodec

public interface CompressionCodec

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	CompressionCodec.Modifier

Method Summary

Modifier and Type	Method and Description
boolean	compress(ByteBuffer in, ByteBuffer out, ByteBuffer overflow) Compress the in buffer to the out buffer.
void	decompress(ByteBuffer in, ByteBuffer out) Decompress the in buffer to the out buffer.
CompressionCodec	modify(EnumSet<CompressionCodec.Modifier> modifiers) Produce a modified compression codec if the underlying algorithm allows modification.

Method Detail

compress

boolean compress(ByteBuffer in,
                 ByteBuffer out,
                 ByteBuffer overflow)
          throws IOException

Compress the in buffer to the out buffer.

Parameters:

in - the bytes to compress

out - the uncompressed bytes

overflow - put any additional bytes here

Returns:

true if the output is smaller than input

Throws:

IOException

decompress

void decompress(ByteBuffer in,
                ByteBuffer out)
         throws IOException

Decompress the in buffer to the out buffer.

Parameters:

in - the bytes to decompress

out - the decompressed bytes

Throws:

IOException

modify

CompressionCodec modify(@Nullable
                        EnumSet<CompressionCodec.Modifier> modifiers)

Produce a modified compression codec if the underlying algorithm allows modification. This does not modify the current object, but returns a new object if modifications are possible. Returns the same object if no modifications are possible.

Parameters:

modifiers - compression modifiers

Returns:

codec for use after optional modification