/*
* Copyright 1998-2014 University Corporation for Atmospheric Research/Unidata
*
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
* Access and use of this software shall impose the following obligations
* and understandings on the user. The user is granted the right, without
* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
* documentation for any purpose whatsoever, provided that this entire
* notice appears in all copies of the software, derivative works and
* supporting documentation. Further, UCAR requests that the user credit
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* software or in any product that includes this software. The names UCAR
* and/or Unidata, however, may not be used in any advertising or publicity
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*
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* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
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*/
package ucar.nc2.ft.point.standard;
import ucar.ma2.StructureData;
/**
* Keeps track of the iteration through nested tables
* 0 is always innermost nested table, 1 is parent of 0, 2 is parent of 1, etc
*
* @author caron
* @since Jan 24, 2009
*/
public class Cursor {
StructureData[] tableData; // current struct data
int[] recnum; // current recnum
int currentIndex; // the "parent index", current iteration is over its children.
Cursor(int nlevels) {
tableData = new StructureData[nlevels];
recnum = new int[nlevels];
}
private int getParentIndex() { // skip null structureData, to allow dummy tables to be inserted, eg FslWindProfiler
int indx = currentIndex;
while ((tableData[indx] == null) && (indx < tableData.length-1)) indx++;
return indx;
}
/* t.kunicki 11/25/10
// Flattened data can now accurately access parent structure
private int getParentIndex() {
int maxIndex = tableData.length - 1;
int parentIndex = currentIndex < maxIndex ? currentIndex + 1 : currentIndex;
while (tableData[parentIndex] == null && parentIndex < maxIndex) parentIndex++;
return parentIndex;
}
// end t.kunicki 11/25/10 */
StructureData getParentStructure() {
return tableData[getParentIndex()];
}
int getParentRecnum() {
return recnum[getParentIndex()];
}
Cursor copy() {
Cursor clone = new Cursor(tableData.length);
//clone.what = what; // not a copy !!
clone.currentIndex = currentIndex;
System.arraycopy(this.tableData, 0, clone.tableData, 0, tableData.length);
System.arraycopy(this.recnum, 0, clone.recnum, 0, tableData.length);
return clone;
}
}