/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, availible at the root
* application directory.
*/
package org.vfny.geoserver.wcs.responses.coverage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import org.geoserver.platform.ServiceException;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.coverage.grid.io.AbstractGridFormat;
import org.geotools.coverage.grid.io.imageio.GeoToolsWriteParams;
import org.geotools.gce.geotiff.GeoTiffFormat;
import org.geotools.gce.geotiff.GeoTiffWriteParams;
import org.geotools.gce.geotiff.GeoTiffWriter;
import org.opengis.parameter.GeneralParameterValue;
import org.opengis.parameter.ParameterValueGroup;
import org.vfny.geoserver.wcs.responses.CoverageResponseDelegate;
/**
* Coverage writer for the geotiff format.
*
* @author $Author: Alessio Fabiani (alessio.fabiani@gmail.com) $ (last modification)
* @author Simone Giannecchini, GeoSolutions SAS
*/
public class GeoTIFFCoverageResponseDelegate implements CoverageResponseDelegate {
private static final Set<String> FORMATS = new HashSet<String>(Arrays.asList("image/tiff","image/tiff;subtype=\"geotiff\"","image/geotiff"));
/**
*
* @uml.property name="sourceCoverage"
* @uml.associationEnd multiplicity="(0 1)"
*/
private GridCoverage2D sourceCoverage;
private static final GeoTiffFormat format = new GeoTiffFormat();
public static final String GEOTIFF_CONTENT_TYPE = "image/tiff;subtype=\"geotiff\"";
public GeoTIFFCoverageResponseDelegate() {
}
public boolean canProduce(String outputFormat) {
return outputFormat != null
&& (outputFormat.equalsIgnoreCase("geotiff") || FORMATS.contains(outputFormat.toLowerCase()));
}
public void prepare(String outputFormat, GridCoverage2D coverage) throws IOException {
this.sourceCoverage = coverage;
}
public String getMimeFormatFor(String outputFormat) {
if (canProduce(outputFormat))
return "image/tiff;subtype=\"geotiff\"";
else
return null;
}
public String getContentType() {
return GEOTIFF_CONTENT_TYPE;
}
/**
* DOCUMENT ME!
*
* @return DOCUMENT ME!
*/
public String getContentEncoding() {
return null;
}
/**
* DOCUMENT ME!
*
* @return DOCUMENT ME!
*/
public String getContentDisposition() {
return "attachment;filename=" + this.sourceCoverage.getName() + ".tif";
}
public String getFileExtension() {
return "tif";
}
public void encode(OutputStream output) throws ServiceException, IOException {
if (sourceCoverage == null) {
throw new IllegalStateException("It seems prepare() has not been called"
+ " or has not succeed");
}
// good for all params
final GeoTiffWriteParams wp = new GeoTiffWriteParams();
wp.setCompressionMode(GeoTiffWriteParams.MODE_EXPLICIT);
wp.setCompressionType("LZW");
wp.setCompressionQuality(0.75F);
wp.setTilingMode(GeoToolsWriteParams.MODE_EXPLICIT);
wp.setTiling(256, 256);
final ParameterValueGroup writerParams = format.getWriteParameters();
writerParams.parameter(AbstractGridFormat.GEOTOOLS_WRITE_PARAMS.getName().toString()).setValue(wp);
// write down
GeoTiffWriter writer = (GeoTiffWriter) format.getWriter(output);
try{
if(writer!=null)
writer.write(sourceCoverage, (GeneralParameterValue[]) writerParams.values().toArray(new GeneralParameterValue[1]));
}finally {
try{
if(writer!=null)
writer.dispose();
}catch (Throwable e) {
// eating exception
}
this.sourceCoverage.dispose(false);
this.sourceCoverage = null;
}
}
}