cdm/src/main/java/ucar/nc2/iosp/IospHelper.java
static public Object readData(PositioningDataInputStream raf, Layout index, DataType dataType, Object arr) throws java.io.IOException {
    if (showLayoutTypes) System.out.println("***PositioningDataInputStream LayoutType=" + index.getClass().getName());

    if (dataType.getPrimitiveClassType() == byte.class || dataType == DataType.CHAR) {
      byte[] pa = (byte[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.read(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      //return (dataType == DataType.CHAR) ? convertByteToChar(pa) : pa;
      if (dataType == DataType.CHAR) return convertByteToChar(pa);
      else return pa;

    } else if (dataType.getPrimitiveClassType() == short.class) {
      short[] pa = (short[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readShort(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType.getPrimitiveClassType() == int.class) {
      int[] pa = (int[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readInt(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType == DataType.FLOAT) {
      float[] pa = (float[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readFloat(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType == DataType.DOUBLE) {
      double[] pa = (double[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readDouble(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType.getPrimitiveClassType() == long.class) {
      long[] pa = (long[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readLong(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType == DataType.STRUCTURE) {
      int recsize = index.getElemSize();
      byte[] pa = (byte[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.read(chunk.getSrcPos(), pa, (int) chunk.getDestElem() * recsize, chunk.getNelems() * recsize);
      }
      return pa;
    }

    throw new IllegalStateException();
  }
static public Object readData(PositioningDataInputStream raf, Layout index, DataType dataType, Object arr) throws java.io.IOException {
    if (showLayoutTypes) System.out.println("***PositioningDataInputStream LayoutType=" + index.getClass().getName());

    if (dataType.getPrimitiveClassType() == byte.class || dataType == DataType.CHAR) {
      byte[] pa = (byte[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.read(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      //return (dataType == DataType.CHAR) ? convertByteToChar(pa) : pa;
      if (dataType == DataType.CHAR) return convertByteToChar(pa);
      else return pa;

    } else if (dataType.getPrimitiveClassType() == short.class) {
      short[] pa = (short[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readShort(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType.getPrimitiveClassType() == int.class) {
      int[] pa = (int[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readInt(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType == DataType.FLOAT) {
      float[] pa = (float[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readFloat(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType == DataType.DOUBLE) {
      double[] pa = (double[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readDouble(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType.getPrimitiveClassType() == long.class) {
      long[] pa = (long[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.readLong(chunk.getSrcPos(), pa, (int) chunk.getDestElem(), chunk.getNelems());
      }
      return pa;

    } else if (dataType == DataType.STRUCTURE) {
      int recsize = index.getElemSize();
      byte[] pa = (byte[]) arr;
      while (index.hasNext()) {
        Layout.Chunk chunk = index.next();
        raf.read(chunk.getSrcPos(), pa, (int) chunk.getDestElem() * recsize, chunk.getNelems() * recsize);
      }
      return pa;
    }

    throw new IllegalStateException();
  }
static public Object readData ( PositioningDataInputStream raf , Layout index , DataType dataType , Object arr ) throws java . io . IOException { if ( showLayoutTypes ) System . out . println ( "***PositioningDataInputStream LayoutType=" + index . getClass ( ) . getName ( ) ) ; if ( dataType . getPrimitiveClassType ( ) == byte . class || dataType == DataType . CHAR ) { byte [ ] pa = ( byte [ ] ) arr ; while ( index . hasNext ( ) ) { Layout . Chunk chunk = index . next ( ) ; raf . read ( chunk . getSrcPos ( ) , pa , ( int ) chunk . getDestElem ( ) , chunk . getNelems ( ) ) ; } //return (dataType == DataType.CHAR) ? convertByteToChar(pa) : pa;
 if ( dataType == DataType . CHAR ) return convertByteToChar ( pa ) ; else return pa ; } else if ( dataType . getPrimitiveClassType ( ) == short . class ) { short [ ] pa = ( short [ ] ) arr ; while ( index . hasNext ( ) ) { Layout . Chunk chunk = index . next ( ) ; raf . readShort ( chunk . getSrcPos ( ) , pa , ( int ) chunk . getDestElem ( ) , chunk . getNelems ( ) ) ; } return pa ; } else if ( dataType . getPrimitiveClassType ( ) == int . class ) { int [ ] pa = ( int [ ] ) arr ; while ( index . hasNext ( ) ) { Layout . Chunk chunk = index . next ( ) ; raf . readInt ( chunk . getSrcPos ( ) , pa , ( int ) chunk . getDestElem ( ) , chunk . getNelems ( ) ) ; } return pa ; } else if ( dataType == DataType . FLOAT ) { float [ ] pa = ( float [ ] ) arr ; while ( index . hasNext ( ) ) { Layout . Chunk chunk = index . next ( ) ; raf . readFloat ( chunk . getSrcPos ( ) , pa , ( int ) chunk . getDestElem ( ) , chunk . getNelems ( ) ) ; } return pa ; } else if ( dataType == DataType . DOUBLE ) { double [ ] pa = ( double [ ] ) arr ; while ( index . hasNext ( ) ) { Layout . Chunk chunk = index . next ( ) ; raf . readDouble ( chunk . getSrcPos ( ) , pa , ( int ) chunk . getDestElem ( ) , chunk . getNelems ( ) ) ; } return pa ; } else if ( dataType . getPrimitiveClassType ( ) == long . class ) { long [ ] pa = ( long [ ] ) arr ; while ( index . hasNext ( ) ) { Layout . Chunk chunk = index . next ( ) ; raf . readLong ( chunk . getSrcPos ( ) , pa , ( int ) chunk . getDestElem ( ) , chunk . getNelems ( ) ) ; } return pa ; } else if ( dataType == DataType . STRUCTURE ) { int recsize = index . getElemSize ( ) ; byte [ ] pa = ( byte [ ] ) arr ; while ( index . hasNext ( ) ) { Layout . Chunk chunk = index . next ( ) ; raf . read ( chunk . getSrcPos ( ) , pa , ( int ) chunk . getDestElem ( ) * recsize , chunk . getNelems ( ) * recsize ) ; } return pa ; } throw new IllegalStateException ( ) ; }
Read data subset from PositioningDataInputStream, place in given primitive array.
Reading is controlled by the Layout object.

@param raf      read from here.
@param index    handles skipping around in the file.
@param dataType dataType of the variable
@param arr      primitive array to read data into
@return primitive array with data read in
@throws java.io.IOException on read error
Read data subset from PositioningDataInputStream place in given primitive array . Reading is controlled by the Layout object .