/* uDig - User Friendly Desktop Internet GIS client
* http://udig.refractions.net
* (C) 2004-2008, Refractions Research Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD
* License v1.0 (http://udig.refractions.net/files/bsd3-v10.html).
*/
package org.locationtech.udig.catalog.rasterings;
import java.io.IOException;
import org.locationtech.udig.catalog.IGeoResource;
import org.eclipse.core.runtime.IProgressMonitor;
import org.geotools.coverage.grid.GeneralGridGeometry;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.coverage.grid.io.AbstractGridCoverage2DReader;
import org.geotools.coverage.grid.io.AbstractGridFormat;
import org.opengis.coverage.grid.GridCoverage;
import org.opengis.parameter.ParameterNotFoundException;
import org.opengis.parameter.ParameterValue;
import org.opengis.parameter.ParameterValueGroup;
/**
* Flag to indicate that the coverage must be kept in memory.
* And time should not be spent reading it from disk for rendering and so on.
* <p>
* The IGeoResource should resolve to:
* <ul>
* <li>ParameterValueGroup - if provided USE_JAI_IMAGEREAD will be added</li>
* <li>AbstractGridCoverage2DReader</li>
* <ul>
*
* @author jeichar
* @since 1.1.0
*/
@SuppressWarnings("deprecation")
public class GridCoverageLoader {
/** Resource being loaded ...*/
protected IGeoResource resource;
public GridCoverageLoader(IGeoResource resource) {
this.resource = resource;
}
public GridCoverage load( GeneralGridGeometry geom, IProgressMonitor monitor ) throws IOException {
ParameterValueGroup group = resource.resolve(ParameterValueGroup.class, monitor);
AbstractGridCoverage2DReader reader = resource.resolve( AbstractGridCoverage2DReader.class, monitor);
if (group == null){
group = reader.getFormat().getReadParameters();
}
else {
// temporary fix for imageio
try {
ParameterValue< ? > tempParam = group
.parameter(AbstractGridFormat.USE_JAI_IMAGEREAD.getName().toString());
if (tempParam != null)
tempParam.setValue(false);
} catch (ParameterNotFoundException e) {
// do nothing
}
}
ParameterValue< ? > param = group.parameter(AbstractGridFormat.READ_GRIDGEOMETRY2D
.getName().toString());
param.setValue(geom);
GridCoverage2D coverage = (GridCoverage2D) reader.read(group.values().toArray(
new ParameterValue[0]));
return coverage;
}
}