Package org.apache.parquet.hadoop.codec
Class SnappyCompressor
- java.lang.Object
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- org.apache.parquet.hadoop.codec.SnappyCompressor
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- All Implemented Interfaces:
org.apache.hadoop.io.compress.Compressor
public class SnappyCompressor extends Object implements org.apache.hadoop.io.compress.Compressor
This class is a wrapper around the snappy compressor. It always consumes the entire input in setInput and compresses it as one compressed block.
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Constructor Summary
Constructors Constructor Description SnappyCompressor()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
compress(byte[] buffer, int off, int len)
Fills specified buffer with compressed data.void
end()
void
finish()
boolean
finished()
long
getBytesRead()
long
getBytesWritten()
boolean
needsInput()
void
reinit(org.apache.hadoop.conf.Configuration c)
void
reset()
void
setDictionary(byte[] dictionary, int off, int len)
void
setInput(byte[] buffer, int off, int len)
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Method Detail
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compress
public int compress(byte[] buffer, int off, int len) throws IOException
Fills specified buffer with compressed data. Returns actual number of bytes of compressed data. A return value of 0 indicates that needsInput() should be called in order to determine if more input data is required.- Specified by:
compress
in interfaceorg.apache.hadoop.io.compress.Compressor
- Parameters:
buffer
- Buffer for the compressed dataoff
- Start offset of the datalen
- Size of the buffer- Returns:
- The actual number of bytes of compressed data.
- Throws:
IOException
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setInput
public void setInput(byte[] buffer, int off, int len)
- Specified by:
setInput
in interfaceorg.apache.hadoop.io.compress.Compressor
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end
public void end()
- Specified by:
end
in interfaceorg.apache.hadoop.io.compress.Compressor
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finish
public void finish()
- Specified by:
finish
in interfaceorg.apache.hadoop.io.compress.Compressor
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finished
public boolean finished()
- Specified by:
finished
in interfaceorg.apache.hadoop.io.compress.Compressor
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getBytesRead
public long getBytesRead()
- Specified by:
getBytesRead
in interfaceorg.apache.hadoop.io.compress.Compressor
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getBytesWritten
public long getBytesWritten()
- Specified by:
getBytesWritten
in interfaceorg.apache.hadoop.io.compress.Compressor
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needsInput
public boolean needsInput()
- Specified by:
needsInput
in interfaceorg.apache.hadoop.io.compress.Compressor
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reinit
public void reinit(org.apache.hadoop.conf.Configuration c)
- Specified by:
reinit
in interfaceorg.apache.hadoop.io.compress.Compressor
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reset
public void reset()
- Specified by:
reset
in interfaceorg.apache.hadoop.io.compress.Compressor
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setDictionary
public void setDictionary(byte[] dictionary, int off, int len)
- Specified by:
setDictionary
in interfaceorg.apache.hadoop.io.compress.Compressor
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