org.integratedmodelling.engine.geospace.gis.Coverage2DState Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright (C) 2007, 2015:
*
* - Ferdinando Villa
* - integratedmodelling.org
* - any other authors listed in @author annotations
*
* All rights reserved. This file is part of the k.LAB software suite,
* meant to enable modular, collaborative, integrated
* development of interoperable data and model components. For
* details, see http://integratedmodelling.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the Affero General Public License
* Version 3 or any later version.
*
* This program is distributed in the hope that it will be useful,
* but without any warranty; without even the implied warranty of
* merchantability or fitness for a particular purpose. See the
* Affero General Public License for more details.
*
* You should have received a copy of the Affero General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* The license is also available at: https://www.gnu.org/licenses/agpl.html
*******************************************************************************/
package org.integratedmodelling.engine.geospace.gis;
import java.awt.image.RenderedImage;
import javax.media.jai.iterator.RandomIter;
import javax.media.jai.iterator.RandomIterFactory;
import org.geotools.coverage.grid.GridCoverage2D;
import org.integratedmodelling.api.modelling.IDirectObservation;
import org.integratedmodelling.api.modelling.IObservableSemantics;
import org.integratedmodelling.api.modelling.IObserver;
import org.integratedmodelling.api.modelling.IScale;
import org.integratedmodelling.common.states.State;
import org.integratedmodelling.engine.geospace.extents.Grid;
import org.integratedmodelling.engine.geospace.extents.SpaceExtent;
import org.integratedmodelling.exceptions.KlabRuntimeException;
/**
* Wraps a GridCoverage2D into a IState to enable switching back and forth without
* copying data.
*
* TODO unused, but should be used.
*
* @author Ferd
*
*/
public class Coverage2DState extends State {
GridCoverage2D _coverage;
private final Grid _grid;
private final RenderedImage _image;
private final RandomIter _itera;
public Coverage2DState(GridCoverage2D coverage, IObservableSemantics observable, IScale scale, IObserver observer,
IDirectObservation context) {
// FIXME see what to do with dynamic state
super(observable, scale, false, false, context);
SpaceExtent ext = (SpaceExtent) scale.getSpace();
if (ext.getGrid() == null) {
throw new KlabRuntimeException("cannot return a raster layer from a non-grid extent");
}
_grid = ext.getGrid();
_image = coverage.getRenderedImage();
_itera = RandomIterFactory.create(_image, null);
_coverage = coverage;
}
@Override
public Object getValue(int contextIndex) {
int[] xy = _grid.getXYOffsets(contextIndex);
return _itera.getSampleDouble(xy[0], xy[1], 0);
}
@Override
public long getValueCount() {
return (_grid.getXCells() * _grid.getYCells());
}
public GridCoverage2D getCoverage() {
return _coverage;
}
}