ucar.nc2.write

Class Nc4ChunkingStrategy

java.lang.Object

ucar.nc2.write.Nc4ChunkingStrategy

All Implemented Interfaces:

Nc4Chunking

Direct Known Subclasses:

Nc4ChunkingDefault

@Immutable
public abstract class Nc4ChunkingStrategy
extends java.lang.Object
implements Nc4Chunking

Abstract superclass for netcdf-4 chunking strategy.

Since:

11/14/12

Nested Class Summary

Nested classes/interfaces inherited from interface ucar.nc2.write.Nc4Chunking

Nc4Chunking.Strategy

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Nc4ChunkingStrategy(int deflateLevel, boolean shuffle)

Method Summary

Modifier and Type	Method and Description
protected int[]	computeChunkingFromAttribute(Variable v)
static Nc4Chunking	factory(Nc4Chunking.Strategy type, int deflateLevel, boolean shuffle)
protected Attribute	getChunkAttribute(Variable v)
int	getDeflateLevel(Variable v) Get the deflation level.
boolean	isShuffle(Variable v) Set true to turn shuffling on which may improve compression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface ucar.nc2.write.Nc4Chunking

computeChunking, isChunked

Constructor Detail

Nc4ChunkingStrategy

protected Nc4ChunkingStrategy(int deflateLevel,
                              boolean shuffle)

Method Detail

factory

public static Nc4Chunking factory(Nc4Chunking.Strategy type,
                                  int deflateLevel,
                                  boolean shuffle)

Parameters:

type - Strategy type

deflateLevel - 0 corresponds to no compression and 9 to maximum compression,

shuffle - true to turn shuffling on which may improve compression. This option is ignored unless a non-zero deflation level is specified.

Returns:

Nc4Chunking implementation

getDeflateLevel

public int getDeflateLevel(Variable v)

Description copied from interface: Nc4Chunking

Get the deflation level. 0 corresponds to no compression and 9 to maximum compression.

Specified by:

getDeflateLevel in interface Nc4Chunking

isShuffle

public boolean isShuffle(Variable v)

Description copied from interface: Nc4Chunking

Set true to turn shuffling on which may improve compression. This option is ignored unless a non-zero deflation level is specified.

Specified by:

isShuffle in interface Nc4Chunking

getChunkAttribute

protected Attribute getChunkAttribute(Variable v)

computeChunkingFromAttribute

protected int[] computeChunkingFromAttribute(Variable v)