Package ucar.nc2.iosp

Interface Layout

  • All Known Subinterfaces:
    LayoutBB
    All Known Implementing Classes:
    LayoutBBTiled, LayoutRegular, LayoutRegularSegmented, LayoutSegmented, LayoutTiled
    public interface Layout
    Iterator to read/write subsets of a multidimensional array, finding the contiguous chunks. The iteration is monotonic in both src and dest positions.

    Example for Integers: 

      int[] read( Layout index, int[] src) {
    int[] dest = new int[index.getTotalNelems()];
    while (index.hasNext()) {
      Layout.Chunk chunk = index.next();
      System.arraycopy(src, chunk.getSrcElem(), dest, chunk.getDestElem(), chunk.getNelems());
    }
    return dest;
  }

  int[] read( Layout index, RandomAccessFile raf) {
    int[] dest = new int[index.getTotalNelems()];
    while (index.hasNext()) {
      Layout.Chunk chunk = index.next();
      raf.seek( chunk.getSrcPos());
      raf.readInt(dest, chunk.getDestElem(), chunk.getNelems());
    }
    return dest;
  }

   // note src and dest misnamed
    void write( Layout index, int[] src, RandomAccessFile raf) {
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.seek ( chunk.getSrcPos());
        for (int k=0; k<chunk.getNelems(); k++)
          raf.writeInt(src, chunk.getDestElem(), chunk.getNelems());
          raf.writeInt( ii.getByteNext());
      }

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Interface Description
      static interface  Layout.Chunk
      A chunk of data that is contiguous in both the source and destination.

    • Method Detail

      • getTotalNelems

        long getTotalNelems()
        Get total number of elements in the wanted subset.

      • getElemSize

        int getElemSize()
        Get size of each element in bytes.

      • hasNext

        boolean hasNext()
        Is there more to do?

      • next

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