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 cllaing program loops over all dataSections that intersect the wanted section.

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

Since:
Jan 9, 2008

  • Constructor Details

    • 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 Details

    • getTotalNelems

      public long getTotalNelems()

    • hasNext

      public boolean hasNext()

    • next

      public IndexChunker.Chunk next()

    • toString

      public String toString()
      Overrides:
      toString in class Object