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.

Inheritance

Properties

decoder → Converter<List<int>,List<int>>
read-only

Get a ZLibDecoder for decoding GZip compressed data.

dictionary → List<int>
read-only

Initial compression dictionary.…

encoder → Converter<List<int>,List<int>>
read-only

Get a ZLibEncoder for encoding to GZip compressed data.

gzip → bool
read-only

When true, GZip frames will be added to the compressed data.

inverted → Codec<List<int>,List<int>>
read-only, inherited

Inverts this.…

level → int
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.

memLevel → int
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.…

raw → bool
read-only

When true, deflate generates raw data with no zlib header or trailer, and will not compute an adler32 check value

strategy → int
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).

windowBits → int
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

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

decode(List<int> encoded) → List<int>
inherited

encode(List<int> input) → List<int>
inherited

fuse(Codec<List<int>> other) → Codec<List<int>>
inherited

Fuses this with other.…