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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 |
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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
IOException
void reset()
void end()
void reinit(Configuration conf)
conf
- Configuration from which new setting are fetched
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