org.hd.d.pg2k.svrCore
Enum CompressionLevel

java.lang.Object
  java.lang.Enum<CompressionLevel>
      org.hd.d.pg2k.svrCore.CompressionLevel

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<CompressionLevel>

public enum CompressionLevel
extends java.lang.Enum<CompressionLevel>

A ranked series of compression methods/levels used in PG2K. This applies to such things as tunnel-frame content and HTTP transport encodings.

Higher numeric levels potentially give greater compression at potentially higher resource cost (especially in the compressor), though YMMV.

The order of elements is from lowest to highest compression.

NONE

public static final CompressionLevel NONE

No compression, thus free to compress/decompress but possibly expensive to store or transmit.

ZIP

public static final CompressionLevel ZIP

GZIP/deflate/zlib-style compression; widely used and generally cheap and effective.

BZIP2

public static final CompressionLevel BZIP2

BZIP2-style compression; more expensive than ZIP (maybe 5x CPU) but more effective on some data sets.

LZMA

public static final CompressionLevel LZMA

LZMA (7-Zip-style) compression; more expensive than ZIP and less tested, but much more effective on some data sets.

PPM

public static final CompressionLevel PPM

PPM compression; very expensive in CPU and memory, but about the best compression available.

level

private final int level

The "level", higher meaning generally better and more expensive; 0 indicates none.

values

public static CompressionLevel[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (CompressionLevel c : CompressionLevel.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static CompressionLevel valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

getLevel

public final int getLevel()

Get the "level", higher meaning generally better and more expensive; 0 indicates none.