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public interface Compressor
Specification of a stream-based 'compressor' which can be
plugged into a CompressionOutputStream to compress data.
This is modelled after Deflater
| 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 uncompressed bytes input so far. |
long |
getBytesWritten()
Return number of compressed bytes output so far. |
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)
Sets preset dictionary for compression. |
void |
setInput(byte[] b,
int off,
int len)
Sets input data for compression. |
| Method Detail |
|---|
void setInput(byte[] b,
int off,
int len)
true indicating that more input data is required.
b - Input dataoff - Start offsetlen - Lengthboolean needsInput()
true if the input data buffer is empty and
#setInput() should be called in order to provide more input.
void setDictionary(byte[] b,
int off,
int len)
b - Dictionary data bytesoff - Start offsetlen - Lengthlong getBytesRead()
long getBytesWritten()
void finish()
boolean finished()
true if the end of the compressed
data output stream has been reached.
int compress(byte[] b,
int off,
int len)
throws IOException
b - Buffer for the compressed dataoff - Start offset of the datalen - Size of the buffer
IOExceptionvoid reset()
void end()
void reinit(Configuration conf)
conf - Configuration from which new setting are fetched
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