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java.lang.Objectorg.apache.hadoop.io.compress.snappy.SnappyCompressor
public class SnappyCompressor
A Compressor based on the snappy compression algorithm.
http://code.google.com/p/snappy/
| Constructor Summary | |
|---|---|
SnappyCompressor()
Creates a new compressor with the default buffer size. |
|
SnappyCompressor(int directBufferSize)
Creates a new compressor. |
|
| Method Summary | |
|---|---|
int |
compress(byte[] b,
int off,
int len)
Fills specified buffer with compressed data. |
void |
end()
Closes the compressor and discards any unprocessed input. |
void |
finish()
When called, indicates that compression should end with the current contents of the input buffer. |
boolean |
finished()
Returns true if the end of the compressed data output stream has been reached. |
long |
getBytesRead()
Return number of bytes given to this compressor since last reset. |
long |
getBytesWritten()
Return number of bytes consumed by callers of compress since last reset. |
boolean |
needsInput()
Returns true if the input data buffer is empty and #setInput() should be called to provide more input. |
void |
reinit(Configuration conf)
Prepare the compressor to be used in a new stream with settings defined in the given Configuration |
void |
reset()
Resets compressor so that a new set of input data can be processed. |
void |
setDictionary(byte[] b,
int off,
int len)
Does nothing. |
void |
setInput(byte[] b,
int off,
int len)
Sets input data for compression. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public SnappyCompressor(int directBufferSize)
directBufferSize - size of the direct buffer to be used.public SnappyCompressor()
| Method Detail |
|---|
public void setInput(byte[] b,
int off,
int len)
true indicating that more input data is required.
setInput in interface Compressorb - Input dataoff - Start offsetlen - Length
public void setDictionary(byte[] b,
int off,
int len)
setDictionary in interface Compressorb - Dictionary data bytesoff - Start offsetlen - Lengthpublic boolean needsInput()
needsInput in interface Compressortrue if the input data buffer is empty and
#setInput() should be called in order to provide more input.public void finish()
finish in interface Compressorpublic boolean finished()
finished in interface Compressortrue if the end of the compressed
data output stream has been reached.
public int compress(byte[] b,
int off,
int len)
throws IOException
compress in interface Compressorb - Buffer for the compressed dataoff - Start offset of the datalen - Size of the buffer
IOExceptionpublic void reset()
reset in interface Compressorpublic void reinit(Configuration conf)
reinit in interface Compressorconf - Configuration from which new setting are fetchedpublic long getBytesRead()
getBytesRead in interface Compressorpublic long getBytesWritten()
getBytesWritten in interface Compressorpublic void end()
end in interface Compressor
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