ucar.ma2.ArrayStructureBBpos Maven / Gradle / Ivy
The newest version!
/*
* Copyright (c) 1998-2018 University Corporation for Atmospheric Research/Unidata
* See LICENSE for license information.
*/
package ucar.ma2;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* Variation of ArrayStructureBB, where the offsets of the records into the ByteBuffer are uneven and must be
* passed in by the user.
*
* @author caron
*/
public class ArrayStructureBBpos extends ArrayStructureBB {
protected int[] positions;
/**
* Construct an ArrayStructureBB with the given ByteBuffer.
*
* @param members the list of structure members.
* @param shape the shape of the structure array
* @param bbuffer the data is stored in this ByteBuffer. bbuffer.order must already be set.
* @param positions offset from the start of the ByteBufffer to each record. must have length = with shape.getSize()
*/
public ArrayStructureBBpos(StructureMembers members, int[] shape, ByteBuffer bbuffer, int[] positions) {
super(members, shape, bbuffer, 0);
this.positions = positions;
}
@Override
protected int calcOffsetSetOrder(int recnum, StructureMembers.Member m) {
if (null != m.getDataObject())
bbuffer.order( (ByteOrder) m.getDataObject());
return positions[recnum] + m.getDataParam();
}
}