Package org.apache.druid.segment.data
Class CompressionStrategy.LZFCompressor
- java.lang.Object
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- org.apache.druid.segment.data.CompressionStrategy.Compressor
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- org.apache.druid.segment.data.CompressionStrategy.LZFCompressor
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- Enclosing class:
- CompressionStrategy
public static class CompressionStrategy.LZFCompressor extends CompressionStrategy.Compressor
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Constructor Summary
Constructors Constructor Description LZFCompressor()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description ByteBuffer
allocateOutBuffer(int inputSize, Closer closer)
Allocates a buffer that should be passed toCompressionStrategy.Compressor.compress(java.nio.ByteBuffer, java.nio.ByteBuffer)
method as output buffer.ByteBuffer
compress(ByteBuffer in, ByteBuffer out)
Returns a ByteBuffer with compressed contents of in between it's position and limit.-
Methods inherited from class org.apache.druid.segment.data.CompressionStrategy.Compressor
allocateInBuffer
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Method Detail
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allocateOutBuffer
public ByteBuffer allocateOutBuffer(int inputSize, Closer closer)
Description copied from class:CompressionStrategy.Compressor
Allocates a buffer that should be passed toCompressionStrategy.Compressor.compress(java.nio.ByteBuffer, java.nio.ByteBuffer)
method as output buffer. Different Compressors require (or work more efficiently with) different kinds of buffers.Allocates a buffer that is always enough to compress a byte sequence of the given size.
If the allocated buffer is a direct buffer, it should be registered to be freed with the given Closer.
- Specified by:
allocateOutBuffer
in classCompressionStrategy.Compressor
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compress
public ByteBuffer compress(ByteBuffer in, ByteBuffer out)
Description copied from class:CompressionStrategy.Compressor
Returns a ByteBuffer with compressed contents of in between it's position and limit. It may be the provided out ByteBuffer, or the in ByteBuffer, depending on the implementation.out
's position and limit are not respected and could be discarded.Contents of
in
between it's position and limit are compressed. It's contents, position and limit shouldn't be changed in compress() method.- Specified by:
compress
in classCompressionStrategy.Compressor
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