rrenkert@31: /*
rrenkert@31:  * Copyright (c) 2010 by Intevation GmbH
rrenkert@31:  *
rrenkert@31:  * This program is free software under the LGPL (>=v2.1)
rrenkert@31:  * Read the file LGPL.txt coming with the software for details
rrenkert@31:  * or visit http://www.gnu.org/licenses/ if it does not exist.
rrenkert@31:  */
rrenkert@31: package de.intevation.mxd.utils;
rrenkert@31: 
rrenkert@31: import org.apache.log4j.Logger;
rrenkert@31: 
rrenkert@31: import org.w3c.dom.Document;
rrenkert@31: import org.w3c.dom.Element;
rrenkert@31: import org.w3c.dom.NodeList;
rrenkert@31: 
rrenkert@31: /**
rrenkert@31:  * Utility class to store map information in a XML structure.
rrenkert@31:  *
rrenkert@31:  * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
rrenkert@31:  */
rrenkert@31: public class MapToXMLUtils
rrenkert@31: {
rrenkert@31:     private Document root;
rrenkert@31:     private XMLUtils.ElementCreator creator;
rrenkert@31: 
rrenkert@31:     public MapToXMLUtils() {
rrenkert@31:         this.root = XMLUtils.newDocument();
rrenkert@31:         creator = new XMLUtils.ElementCreator(root, "", "");
rrenkert@31:     }
rrenkert@31: 
rrenkert@31:     /**
rrenkert@31:      * Create the top level map element.
rrenkert@31:      *
rrenkert@31:      * @return The new map element.
rrenkert@31:      */
rrenkert@31:     public Element createMap()
rrenkert@31:     throws Exception {
rrenkert@31:         Element map;
rrenkert@31:         NodeList list = root.getElementsByTagName("map");
rrenkert@31:         if(list == null || list.getLength() == 0){
rrenkert@31:             map = creator.create("map");
rrenkert@31:             root.appendChild(map);
rrenkert@31:         }
rrenkert@31:         else if(list.getLength() == 1){
rrenkert@31:             map = (Element)list.item(0);
rrenkert@31:         }
rrenkert@31:         else{
rrenkert@31:             throw new Exception("Error while creating map node.");
rrenkert@31:         }
rrenkert@31:         return map;
rrenkert@31:     }
rrenkert@31: 
rrenkert@31:     /**
rrenkert@31:      * Add a layer element to the map.
rrenkert@31:      * @param name The layer name.
rrenkert@31:      * @return The layer element.
rrenkert@31:      */
rrenkert@31:     public Element addLayer()
rrenkert@31:     throws Exception {
rrenkert@31:         Element node = creator.create("layer");
rrenkert@31:         NodeList list = root.getElementsByTagName("map");
rrenkert@31:         if(list == null || list.getLength() == 0){
rrenkert@31:             throw new Exception("No map node found!");
rrenkert@31:         }
rrenkert@31:         else if(list.getLength() > 1) {
rrenkert@31:             throw new Exception("Found more than one map node." +
rrenkert@31:                                 " This should never happen!");
rrenkert@31:         }
rrenkert@31:         else {
rrenkert@31:             list.item(0).appendChild(node);
rrenkert@31:             return node;
rrenkert@31:         }
rrenkert@31:     }
rrenkert@31: 
rrenkert@31:     /**
rrenkert@31:      * Add a renderer element to the map.
rrenkert@31:      * @param layer The parent layer element.
rrenkert@31:      * @return The renderer element.
rrenkert@31:      */
rrenkert@31:     public Element addRenderer(Element layer) {
rrenkert@31:         Element node = creator.create("renderer");
rrenkert@31:         layer.appendChild(node);
rrenkert@31:         return node;
rrenkert@31:     }
rrenkert@31: 
rrenkert@31:     /**
rrenkert@31:      * Add a symbol element to the map.
rrenkert@31:      * @param renderer The parent renderer element.
rrenkert@31:      * @return The symbol element.
rrenkert@31:      */
rrenkert@31:     public Element addSymbol(Element renderer) {
rrenkert@31:         Element node = creator.create("symbol");
rrenkert@31:         renderer.appendChild(node);
rrenkert@31:         return node;
rrenkert@31:     }
rrenkert@31: 
rrenkert@31:     /**
rrenkert@31:      * Print out the XML document.
rrenkert@31:      */
rrenkert@31:     public void print() {
rrenkert@31:         XMLUtils.toStream(root, System.out);
rrenkert@31:     }
rrenkert@31: }