The GZipCodec encodes raw bytes to GZip compressed bytes and decodes GZip
compressed bytes to raw bytes.
The difference between ZLibCodec and GZipCodec is that the GZipCodec
wraps the ZLib
compressed bytes in GZip
frames.
Properties
-
bool
gzip
-
read-only
When true, GZip frames will be added to the compressed data.
-
int
level
-
read-only
The compression-level can be set in the range of -1..9, with 6 being
the default compression level. Levels above 6 will have higher
compression rates at the cost of more CPU and memory usage. Levels below
6 will use less CPU and memory at the cost of lower compression rates.
-
int
memLevel
-
read-only
Specifies how much memory should be allocated for the internal compression
state. 1 uses minimum memory but is slow and reduces compression ratio;
9 uses maximum memory for optimal speed. The default value is 8.
-
int
strategy
-
read-only
Tunes the compression algorithm. Use the value
ZLibOption.STRATEGY_DEFAULT for normal data,
ZLibOption.STRATEGY_FILTERED for data produced by a filter
(or predictor), ZLibOption.STRATEGY_HUFFMAN_ONLY to force Huffman
encoding only (no string match), or ZLibOption.STRATEGY_RLE to limit
match distances to one (run-length encoding).
-
int
windowBits
-
read-only
Base two logarithm of the window size (the size of the history buffer). It
should be in the range 8..15. Larger values result in better compression
at the expense of memory usage. The default value is 15
-
List<int>
dictionary
-
read-only
Initial compression dictionary.
-
bool
raw
-
read-only
When true, deflate generates raw data with no zlib header or trailer, and
will not compute an adler32 check value
-
Converter<List<int>,List<int>>
encoder
-
read-only
Get a [ZLibEncoder] for encoding to GZip compressed data.
-
Converter<List<int>,List<int>>
decoder
-
read-only
Get a [ZLibDecoder] for decoding GZip compressed data.
-
Codec<List<int>,List<int>>
inverted
-
read-only
, inherited
Inverts this.
-
Codec<List<int>,List<int>>
inverted
-
read-only
, inherited
Inverts this.
Constructors
-
GZipCodec({int level: ZLibOption.DEFAULT_LEVEL, int windowBits: ZLibOption.DEFAULT_WINDOW_BITS, int memLevel: ZLibOption.DEFAULT_MEM_LEVEL, int strategy: ZLibOption.STRATEGY_DEFAULT, List<int> dictionary: null, bool raw: false, bool gzip: true})
-