/*
* 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
* to endorse or promote any products or commercial entity unless specific
* written permission is obtained from UCAR/Unidata. The user also
* understands that UCAR/Unidata is not obligated to provide the user with
* any support, consulting, training or assistance of any kind with regard
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* the user with any updates, revisions, new versions or "bug fixes."
*
* 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,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package ucar.nc2.ft.point.standard;
import ucar.nc2.ft.point.OneNestedPointCollectionImpl;
import ucar.nc2.ft.point.TrajectoryFeatureImpl;
import ucar.nc2.ft.point.PointCollectionIteratorFiltered;
import ucar.nc2.ft.*;
import ucar.nc2.constants.FeatureType;
import ucar.nc2.units.DateUnit;
import ucar.ma2.StructureDataIterator;
import ucar.ma2.StructureData;
import ucar.unidata.geoloc.LatLonRect;
import java.io.IOException;
/**
* TrajectoryFeatureCollection using nested tables.
* @author caron
* @since Dec 31, 2008
*/
public class StandardTrajectoryCollectionImpl extends OneNestedPointCollectionImpl implements TrajectoryFeatureCollection {
private DateUnit timeUnit;
private NestedTable ft;
protected StandardTrajectoryCollectionImpl(String name) {
super(name, FeatureType.TRAJECTORY);
}
StandardTrajectoryCollectionImpl(NestedTable ft, DateUnit timeUnit) {
super(ft.getName(), FeatureType.TRAJECTORY);
this.ft = ft;
this.timeUnit = timeUnit;
}
public PointFeatureCollectionIterator getPointFeatureCollectionIterator(int bufferSize) throws IOException {
return new TrajCollectionIterator( ft.getRootFeatureDataIterator(bufferSize));
}
private TrajCollectionIterator localIterator = null;
public boolean hasNext() throws IOException {
if (localIterator == null) resetIteration();
return localIterator.hasNext();
}
public TrajectoryFeatureCollection subset(LatLonRect boundingBox) throws IOException {
return new StandardTrajectoryCollectionSubset( this, boundingBox);
}
// need covariant return to allow superclass to implement
public TrajectoryFeature next() throws IOException {
return localIterator.next();
}
public void resetIteration() throws IOException {
localIterator = (TrajCollectionIterator) getPointFeatureCollectionIterator(-1);
}
private class TrajCollectionIterator implements PointFeatureCollectionIterator {
StructureDataIterator structIter;
int count = 0;
StructureData nextTraj;
TrajCollectionIterator(ucar.ma2.StructureDataIterator structIter) throws IOException {
this.structIter = structIter;
}
public boolean hasNext() throws IOException {
while (true) {
if(!structIter.hasNext()) return false;
nextTraj = structIter.next();
if (!ft.isFeatureMissing(nextTraj)) break;
}
return true;
}
public TrajectoryFeature next() throws IOException {
Cursor cursor = new Cursor(ft.getNumberOfLevels());
cursor.recnum[1] = structIter.getCurrentRecno();
cursor.tableData[1] = nextTraj;
cursor.currentIndex = 1;
ft.addParentJoin(cursor); // there may be parent joins
return new StandardTrajectoryFeature(cursor);
}
public void setBufferSize(int bytes) { }
public void finish() {
}
}
///////////////////////////////////////
// TrajectoryFeature using nested tables.
private class StandardTrajectoryFeature extends TrajectoryFeatureImpl {
Cursor cursor;
StandardTrajectoryFeature(Cursor cursor) {
super(ft.getFeatureName(cursor), -1);
this.cursor = cursor;
}
public PointFeatureIterator getPointFeatureIterator(int bufferSize) throws IOException {
Cursor cursorIter = cursor.copy();
StructureDataIterator siter = ft.getLeafFeatureDataIterator( cursorIter, bufferSize);
StandardPointFeatureIterator iter = new StandardPointFeatureIterator(ft, timeUnit, siter, cursorIter);
if ((boundingBox == null) || (dateRange == null) || (npts < 0))
iter.setCalculateBounds(this);
return iter;
}
}
///////////////////////////////////////
private class StandardTrajectoryCollectionSubset extends StandardTrajectoryCollectionImpl {
TrajectoryFeatureCollection from;
LatLonRect boundingBox;
StandardTrajectoryCollectionSubset(TrajectoryFeatureCollection from, LatLonRect boundingBox) {
super(from.getName()+"-subset");
this.from = from;
this.boundingBox = boundingBox;
}
public PointFeatureCollectionIterator getPointFeatureCollectionIterator(int bufferSize) throws IOException {
return new PointCollectionIteratorFiltered( from.getPointFeatureCollectionIterator(bufferSize), new Filter());
}
private class Filter implements PointFeatureCollectionIterator.Filter {
public boolean filter(PointFeatureCollection pointFeatureCollection) {
ProfileFeature profileFeature = (ProfileFeature) pointFeatureCollection;
return boundingBox.contains(profileFeature.getLatLon());
}
}
}
}