Package ucar.nc2.iosp

Class IndexChunkerTiled

java.lang.Object

ucar.nc2.iosp.IndexChunkerTiled

public class IndexChunkerTiled
extends Object

Assume that the data is stored divided into sections, described by dataSection. All the data within a dataSection is stored contiguously, in a regular layout. Assume dataSection strides must be = 1, that is, the stored data is not strided.

The user asks for some section, wantSection (may have strides). For each dataSection that intersects wantSection, a IndexChunkerTiled is created, which figures out the optimal access pattern, based on reading contiguous runs of data. Each IndexChunkerTiled handles only one dataSection. Typically the calling program loops over all dataSections that intersect the wanted section.

Both dataSection and wantSection refer to the variable's overall shape.

Constructor Summary

Constructors

Constructor	Description
IndexChunkerTiled(Section dataSection, Section wantSection)	Constructor.

Method Summary

Modifier and Type	Method	Description
long	getTotalNelems()
boolean	hasNext()
IndexChunker.Chunk	next()
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

IndexChunkerTiled

public IndexChunkerTiled(Section dataSection,
                         Section wantSection)
                  throws InvalidRangeException

Constructor. Assume varSection.intersects(wantSection).

Parameters:

dataSection - the section of data we actually have. must have all ranges with stride = 1.

wantSection - the wanted section of data, it will be intersected with dataSection. dataSection.intersects(wantSection) must be true

Throws:

InvalidRangeException - if ranges are malformed

Method Detail

getTotalNelems

public long getTotalNelems()

hasNext

public boolean hasNext()

next

public IndexChunker.Chunk next()

toString

public String toString()

Overrides:

toString in class Object