/* 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.geoserver.wms.kvp;

import java.awt.image.IndexColorModel;

import org.geoserver.ows.KvpParser;
import org.geoserver.platform.ServiceException;
import org.geotools.image.palette.InverseColorMapOp;

/**
 * 
 * @author Simone Giannecchini, GeoSolutions SAS
 * 
 */
public class PaletteKvpParser extends KvpParser {
	public PaletteKvpParser() {
		super("palette", IndexColorModel.class);
	}

	public Object parse(String value) throws Exception {
		// palette
		try {
			final InverseColorMapOp model = PaletteManager.getPalette(value);
			if (model == null) {
				throw new ServiceException("Palette " + value
						+ " could not be found "
						+ "in $GEOSERVER_DATA_DIR/palettes directory");
			}

			return model;
		} catch (Exception e) {
			throw new ServiceException(e, "Palette " + value
					+ " could not be loaded");
		}
	}
}