/* (c) 2015 Open Source Geospatial Foundation - all rights reserved
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */
package org.geoserver.wcs.response;

import java.util.HashMap;

import org.geoserver.ogr.core.AbstractToolConfigurator;
import org.geoserver.ogr.core.Format;
import org.geoserver.ogr.core.FormatConverter;
import org.geoserver.ogr.core.OutputType;
import org.geoserver.ogr.core.ToolConfiguration;
import org.geoserver.ogr.core.ToolWrapperFactory;

import com.thoughtworks.xstream.XStream;

/**
 * Loads the gdal_translate.xml configuration file and configures the output format accordingly.
 *
 * <p>Also keeps tabs on the configuration file, reloading the file as needed.
 * 
 * @author Stefano Costa, GeoSolutions
 *
 */
public class GdalConfigurator extends AbstractToolConfigurator {

    public static final ToolConfiguration DEFAULT;
    static {
        // assume it's in the classpath and GDAL_DATA is properly set in the enviroment
        // and add some default formats
        Format pdfFormat = new Format("PDF", "GDAL-PDF", ".pdf", true, "application/pdf");
        pdfFormat.getFormatAdapters().add(new GrayAlphaToRGBA());
        pdfFormat.getFormatAdapters().add(new PalettedToRGB());
        DEFAULT = new ToolConfiguration(
                "gdal_translate",
                new HashMap<String, String>(),
                new Format[] {
                    new Format("JPEG2000", "GDAL-JPEG2000", ".jp2", true, "image/jp2"),
                    pdfFormat,
                    new Format("AAIGrid", "GDAL-ArcInfoGrid", ".asc", false, null),
                    new Format("XYZ", "GDAL-XYZ", ".txt", true, "text/plain", OutputType.TEXT)
                });
    }

    public GdalConfigurator(FormatConverter format, ToolWrapperFactory wrapperFactory) {
        super(format, wrapperFactory);
    }

    @Override
    protected String getConfigurationFile() {
        return "gdal/gdal_translate.xml";
    }

    @Override
    protected ToolConfiguration getDefaultConfiguration() {
        return DEFAULT;
    }
    
    @Override
    protected XStream buildXStream() {
        XStream xstream = super.buildXStream();
        xstream.alias("GrayAlphaToRGBA", GrayAlphaToRGBA.class);
        xstream.alias("PalettedToRGB", PalettedToRGB.class);
        return xstream;
    }

}