/*
* Copyright 1998-2009 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
* UCAR/Unidata in any publications that result from the use of this
* 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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*
* THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
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* WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package ucar.nc2.ft.point.standard;
import ucar.ma2.ArrayStructure;
import ucar.ma2.StructureData;
import ucar.nc2.dataset.StructureDS;
import ucar.nc2.dataset.VariableDS;
import java.io.IOException;
/**
* Join data from a row of a Structure, whose index is passed in as the value of a member variable of the
* leaf StructureData (cursor.table[0]).
*
* @author caron
* @since Jan 22, 2009
*/
public class JoinParentIndex implements Join {
StructureDS parentStructure;
ArrayStructure parentData;
String parentIndex;
/**
* Constructor.
* @param parentStructure get data from this Structure
* @param parentIndex name of member variable in leaf StructureData
*/
public JoinParentIndex(StructureDS parentStructure, String parentIndex) {
this.parentStructure = parentStructure;
this.parentIndex = parentIndex;
try {
parentData = (ArrayStructure) parentStructure.read(); // cache entire ArrayStructure LOOK
} catch (IOException e) {
e.printStackTrace();
}
}
public StructureData getJoinData(Cursor cursor) {
StructureData sdata = cursor.tableData[0]; // LOOK ??
int index = sdata.getScalarInt(parentIndex);
return parentData.getStructureData(index);
}
public VariableDS findVariable(String axisName) {
return (VariableDS) parentStructure.findVariable(axisName);
}
@Override
public String toString() {
return "JoinParentIndex{" +
"parentStructure=" + parentStructure +
", parentIndex='" + parentIndex +
'}';
}
}