svgmapproducer.java

电子地图服务器,搭建自己的地图服务

/* 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.wms.responses.map.svg;

import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Logger;

import org.vfny.geoserver.ServiceException;
import org.vfny.geoserver.global.Service;
import org.vfny.geoserver.wms.GetMapProducer;
import org.vfny.geoserver.wms.WmsException;
import org.vfny.geoserver.wms.responses.AbstractGetMapProducer;

/**
 * Handles a GetMap request that spects a map in SVG format.
 * 
 * @author Gabriel Rold?n
 * @version $Id: SVGMapProducer.java 7746 2007-11-13 15:38:35Z aaime $
 */
public class SVGMapProducer extends AbstractGetMapProducer implements
		GetMapProducer {
	/** DOCUMENT ME! */
	private static final Logger LOGGER = org.geotools.util.logging.Logging.getLogger("org.vfny.geoserver.responses.wms.map");

	/** DOCUMENT ME! */
	private EncodeSVG svgEncoder;

	/**
	 * DOCUMENT ME!
	 * 
	 * @param gs
	 *            DOCUMENT ME!
	 */
	public void abort(Service gs) {
		this.svgEncoder.abort();
	}

	/**
	 * DOCUMENT ME!
	 * 
	 * @param gs
	 *            DOCUMENT ME!
	 * 
	 * @return DOCUMENT ME!
	 */
	public String getContentType() {
		return SvgMapProducerFactory.MIME_TYPE;
	}

	/**
	 * DOCUMENT ME!
	 * 
	 * @return DOCUMENT ME!
	 */
	public String getContentEncoding() {
		return null;
	}

	/**
	 * aborts the encoding.
	 */
	public void abort() {
		LOGGER.fine("aborting SVG map response");

		if (this.svgEncoder != null) {
			LOGGER.info("aborting SVG encoder");
			this.svgEncoder.abort();
		}
	}

	/**
	 * DOCUMENT ME!
	 * 
	 * @param map
	 *            DOCUMENT ME!
	 * 
	 * @throws WmsException
	 *             DOCUMENT ME!
	 */
	public void produceMap() throws WmsException {
		if (mapContext == null) {
			throw new WmsException("The map context is not set");
		}

		this.svgEncoder = new EncodeSVG(mapContext);
	}

	/**
	 * DOCUMENT ME!
	 * 
	 * @param out
	 *            DOCUMENT ME!
	 * 
	 * @throws ServiceException
	 *             DOCUMENT ME!
	 * @throws IOException
	 *             DOCUMENT ME!
	 */
	public void writeTo(OutputStream out) throws ServiceException, IOException {
		this.svgEncoder.encode(out);
	}

	public String getContentDisposition() {
		// can be null
		return null;
	}
}