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public interface Decompressor
Specification of a stream-based 'de-compressor' which can be
plugged into a CompressionInputStream to compress data.
This is modelled after Inflater
| Method Summary | |
|---|---|
int |
decompress(byte[] b,
int off,
int len)
Fills specified buffer with uncompressed data. |
void |
end()
Closes the decompressor and discards any unprocessed input. |
boolean |
finished()
Returns true if the end of the decompressed data output stream has been reached. |
int |
getRemaining()
Returns the number of bytes remaining in the compressed-data buffer; typically called after the decompressor has finished decompressing the current gzip stream (a.k.a. |
boolean |
needsDictionary()
Returns true if a preset dictionary is needed for decompression. |
boolean |
needsInput()
Returns true if the input data buffer is empty and setInput(byte[], int, int) should be called to
provide more input. |
void |
reset()
Resets decompressor and input and output buffers 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 decompression. |
| Method Detail |
|---|
void setInput(byte[] b,
int off,
int len)
needsInput() returns
true indicating that more input data is required.
(Both native and non-native versions of various Decompressors require
that the data passed in via b[] remain unmodified until
the caller is explicitly notified--via needsInput()--that the
buffer may be safely modified. With this requirement, an extra
buffer-copy can be avoided.)
b - Input dataoff - Start offsetlen - Lengthboolean needsInput()
setInput(byte[], int, int) should be called to
provide more input.
true if the input data buffer is empty and
setInput(byte[], int, int) should be called in
order to provide more input.
void setDictionary(byte[] b,
int off,
int len)
b - Dictionary data bytesoff - Start offsetlen - Lengthboolean needsDictionary()
true if a preset dictionary is needed for decompression.
true if a preset dictionary is needed for decompressionboolean finished()
true if the end of the decompressed
data output stream has been reached.
int decompress(byte[] b,
int off,
int len)
throws IOException
needsInput() should be called in order to determine if more
input data is required.
b - Buffer for the compressed dataoff - Start offset of the datalen - Size of the buffer
IOExceptionint getRemaining()
void reset()
void end()
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