Package ucar.nc2.iosp

Interface LayoutBB

All Superinterfaces:

Layout

All Known Implementing Classes:

LayoutBBTiled

public interface LayoutBB
extends Layout

A Layout that supplies the "source" ByteBuffer. This is used when the data must be massaged after being read, eg uncompresed or filtered. The modified data is placed in a ByteBuffer, which may change for different chunks, and so is supplied by each chunk.

Example for Integers:

 int[] read(LayoutBB index, int[] pa) {
   while (index.hasNext()) {
     LayoutBB.Chunk chunk = index.next();
     IntBuffer buff = chunk.getIntBuffer();
     buff.position(chunk.getSrcElem());
     int pos = (int) chunk.getDestElem();
     for (int i = 0; i < chunk.getNelems(); i++)
       pa[pos++] = buff.get();
   }
   return pa;
 }
 

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	LayoutBB.Chunk	A contiguous chunk of data as a ByteBuffer.

Method Summary

Modifier and Type	Method	Description
LayoutBB.Chunk	next()	Get the next chunk, not null if hasNext() is true.

Methods inherited from interface ucar.nc2.iosp.Layout

getElemSize, getTotalNelems, hasNext

Method Detail

next

LayoutBB.Chunk next()

Description copied from interface: Layout

Get the next chunk, not null if hasNext() is true.

Specified by:

next in interface Layout