/*
* 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
* to the use, operation and performance of this software nor to provide
* 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;
import ucar.nc2.ft.PointFeatureCollection;
import ucar.nc2.ft.PointFeatureIterator;
import ucar.nc2.ft.PointFeature;
import ucar.nc2.units.DateRange;
import ucar.nc2.constants.FeatureType;
import ucar.unidata.geoloc.LatLonRect;
import java.io.IOException;
/**
* Abstract superclass for PointFeatureCollection
* Subclass must supply getPointFeatureIterator().
*
* @author caron
* @since Mar 1, 2008
*/
public abstract class PointCollectionImpl implements PointFeatureCollection {
protected String name;
protected LatLonRect boundingBox;
protected DateRange dateRange;
protected int npts;
protected PointFeatureIterator localIterator;
protected PointCollectionImpl(String name) {
this.name = name;
this.npts = -1;
}
protected PointCollectionImpl(String name, LatLonRect boundingBox, DateRange dateRange, int npts) {
this.name = name;
this.boundingBox = boundingBox;
this.dateRange = dateRange;
this.npts = npts;
}
public String getName() {
return name;
}
public boolean hasNext() throws IOException {
if (localIterator == null) resetIteration();
return localIterator.hasNext();
}
public void finish() {
if (localIterator != null)
localIterator.finish();
}
public PointFeature next() throws IOException {
return localIterator.next();
}
public void resetIteration() throws IOException {
localIterator = getPointFeatureIterator(-1);
}
public int size() {
return npts;
}
public DateRange getDateRange() {
return dateRange;
}
public ucar.unidata.geoloc.LatLonRect getBoundingBox() {
return boundingBox;
}
public void setDateRange(DateRange range) {
this.dateRange = range;
}
public void setBoundingBox(ucar.unidata.geoloc.LatLonRect bb) {
this.boundingBox = bb;
}
public void calcBounds() throws java.io.IOException {
if ((dateRange != null) && (boundingBox != null) && (size() > 0))
return;
PointFeatureIterator iter = getPointFeatureIterator(-1);
iter.setCalculateBounds(this);
try {
while (iter.hasNext())
iter.next();
} finally {
iter.finish();
}
}
public void setSize(int npts) {
this.npts = npts;
}
public FeatureType getCollectionFeatureType() {
return FeatureType.POINT;
}
public PointFeatureCollection subset(LatLonRect boundingBox, DateRange dateRange) throws IOException {
return new PointCollectionSubset(this, boundingBox, dateRange);
}
// for subsetting, the best we can do in general is to filter the original iterator.
// subclasses may do something better
protected class PointCollectionSubset extends PointCollectionImpl {
protected PointCollectionImpl from;
public PointCollectionSubset(PointCollectionImpl from, LatLonRect filter_bb, DateRange filter_date) {
super(from.name);
this.from = from;
if (filter_bb == null)
this.boundingBox = from.boundingBox;
else
this.boundingBox = (from.boundingBox == null) ? filter_bb : from.boundingBox.intersect(filter_bb);
if (filter_date == null) {
this.dateRange = from.dateRange;
} else {
this.dateRange = (from.dateRange == null) ? filter_date : from.dateRange.intersect(filter_date);
}
}
public PointFeatureIterator getPointFeatureIterator(int bufferSize) throws IOException {
return new PointIteratorFiltered(from.getPointFeatureIterator(bufferSize), this.boundingBox, this.dateRange);
}
}
}