/* 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 java.util.zip.ZipOutputStream;
import org.geoserver.platform.ServiceException;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.gce.gtopo30.GTopo30Writer;
import org.opengis.coverage.grid.GridCoverageWriter;
import org.vfny.geoserver.wcs.responses.CoverageResponseDelegate;
/**
* Encoder for gtopo format
* @author Simone Giannecchini, GeoSolutions SAS
*
*/
@SuppressWarnings("deprecation")
public class GTopo30CoverageResponseDelegate implements CoverageResponseDelegate {
private static final Set<String> FORMATS = new HashSet<String>(Arrays
.asList("application/gtopo30"));
/**
* the grid coverage to be used in this repsonse
*
* @uml.property name="sourceCoverage"
* @uml.associationEnd multiplicity="(0 1)"
*/
private GridCoverage2D sourceCoverage;
/*
* (non-Javadoc)
*
* @see org.vfny.geoserver.wcs.responses.CoverageResponseDelegate#canProduce(java.lang.String)
*/
public boolean canProduce(String outputFormat) {
return outputFormat != null
&& (outputFormat.equalsIgnoreCase("GTopo30") || FORMATS.contains(outputFormat
.toLowerCase()));
}
public String getMimeFormatFor(String outputFormat) {
if (canProduce(outputFormat))
return "application/gtopo30";
else
return null;
}
/*
* (non-Javadoc)
*
* @see org.vfny.geoserver.wcs.responses.CoverageResponseDelegate#prepare(java.lang.String,
* org.geotools.coverage.grid.GridCoverage2D)
*/
public void prepare(String outputFormat, GridCoverage2D coverage) throws IOException {
this.sourceCoverage = coverage;
}
/*
* (non-Javadoc)
*
* @see
* org.vfny.geoserver.wcs.responses.CoverageResponseDelegate#getContentType(org.vfny.geoserver
* .global.GeoServer)
*/
public String getContentType() {
return "application/x-zip";
}
/*
* (non-Javadoc)
*
* @see org.vfny.geoserver.wcs.responses.CoverageResponseDelegate#getContentEncoding()
*/
public String getContentEncoding() {
// return "zip";
return null;
}
/**
* DOCUMENT ME!
*
* @return DOCUMENT ME!
*/
public String getContentDisposition() {
return new StringBuffer("attachment;filename=").append(this.sourceCoverage.getName())
.append(".zip").toString();
}
public String getFileExtension() {
return "zip";
}
/*
* (non-Javadoc)
*
* @see org.vfny.geoserver.wcs.responses.CoverageResponseDelegate#encode(java.io.OutputStream)
*/
public void encode(OutputStream output) throws ServiceException, IOException {
// creating a zip outputstream
final ZipOutputStream outZ = new ZipOutputStream(output);
output = outZ;
// creating a writer
final GridCoverageWriter writer = new GTopo30Writer(outZ);
try{
// writing
writer.write(sourceCoverage, null);
}finally{
try{
// freeing everything
writer.dispose();
}catch (Throwable e) {
// TODO: handle exception
}
this.sourceCoverage.dispose(false);
this.sourceCoverage = null;
}
}
}