public class Lz4Decompressor extends Object implements Decompressor
Decompressor
based on the lz4 compression algorithm.
http://code.google.com/p/lz4/Constructor and Description |
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Lz4Decompressor()
Creates a new decompressor with the default buffer size.
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Lz4Decompressor(int directBufferSize)
Creates a new compressor.
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Modifier and Type | Method and Description |
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int |
decompress(byte[] b,
int off,
int len)
Fills specified buffer with uncompressed data.
|
void |
end()
Resets decompressor and input and output buffers so that a new set of
input data can be processed.
|
boolean |
finished()
Returns true if the end of the decompressed
data output stream has been reached.
|
int |
getRemaining()
Returns
0 . |
boolean |
needsDictionary()
Returns
false . |
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.
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void |
setDictionary(byte[] b,
int off,
int len)
Does nothing.
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void |
setInput(byte[] b,
int off,
int len)
Sets input data for decompression.
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public Lz4Decompressor(int directBufferSize)
directBufferSize
- size of the direct buffer to be used.public Lz4Decompressor()
public 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.)setInput
in interface Decompressor
b
- Input dataoff
- Start offsetlen
- Lengthpublic void setDictionary(byte[] b, int off, int len)
setDictionary
in interface Decompressor
b
- Dictionary data bytesoff
- Start offsetlen
- Lengthpublic boolean needsInput()
setInput(byte[], int, int)
should be called to
provide more input.needsInput
in interface Decompressor
true
if the input data buffer is empty and
setInput(byte[], int, int)
should be called in
order to provide more input.public boolean needsDictionary()
false
.needsDictionary
in interface Decompressor
false
.public boolean finished()
finished
in interface Decompressor
true
if the end of the decompressed
data output stream has been reached.public int decompress(byte[] b, int off, int len) throws IOException
needsInput()
should be called in order to determine if more
input data is required.decompress
in interface Decompressor
b
- Buffer for the compressed dataoff
- Start offset of the datalen
- Size of the bufferIOException
public int getRemaining()
0
.getRemaining
in interface Decompressor
0
.public void reset()
Decompressor
Decompressor.finished()
} returns
true
and Decompressor.getRemaining()
returns a positive value,
reset() is called before processing of the next data stream in the
concatenated data stream. Decompressor.finished()
will be reset and will
return false
when reset() is called.reset
in interface Decompressor
public void end()
end
in interface Decompressor
Copyright © 2013 Apache Software Foundation. All rights reserved.