class
GZipCodec

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.

Extends

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})

Methods

encode(List<int> input) → List<int>
inherited
decode(List<int> encoded) → List<int>
inherited
fuse(Codec<List<int>> other) → Codec<List<int>>
inherited
Fuses this with other.
encode(List<int> input) → List<int>
inherited
decode(List<int> encoded) → List<int>
inherited
fuse(Codec<List<int>> other) → Codec<List<int>>
inherited
Fuses this with other.