Mercurial > mxd2map > mxd2map

annotate src/java/de/intevation/mxd/utils/MapToXMLUtils.java @ 31:40c0b4e5f91a

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Added utility class to store map attributes.
author Raimund Renkert <rrenkert@intevation.de>
date Mon, 11 Apr 2011 16:04:03 +0200
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children 7a927921eb6c
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31
40c0b4e5f91a Added utility class to store map attributes.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8 package de.intevation.mxd.utils;
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9
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10 import org.apache.log4j.Logger;
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11
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12 import org.w3c.dom.Attr;
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13 import org.w3c.dom.Document;
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14 import org.w3c.dom.Element;
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15 import org.w3c.dom.NodeList;
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16
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17 /**
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18 * Utility class to store map information in a XML structure.
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19 *
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20 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
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21 */
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22 public class MapToXMLUtils
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23 {
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24 private Document root;
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25 private XMLUtils.ElementCreator creator;
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26
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27 public MapToXMLUtils() {
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28 this.root = XMLUtils.newDocument();
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29 creator = new XMLUtils.ElementCreator(root, "", "");
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30 }
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31
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32 /**
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33 * Create the top level map element.
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34 *
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35 * @return The new map element.
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36 */
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37 public Element createMap()
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38 throws Exception {
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39 Element map;
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40 NodeList list = root.getElementsByTagName("map");
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41 if(list == null || list.getLength() == 0){
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42 map = creator.create("map");
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43 root.appendChild(map);
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44 }
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45 else if(list.getLength() == 1){
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46 map = (Element)list.item(0);
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47 }
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48 else{
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49 throw new Exception("Error while creating map node.");
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50 }
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51 return map;
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52 }
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53
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54 /**
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55 * Add a layer element to the map.
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56 * @param name The layer name.
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57 * @return The layer element.
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58 */
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59 public Element addLayer()
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60 throws Exception {
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61 Element node = creator.create("layer");
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62 NodeList list = root.getElementsByTagName("map");
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63 if(list == null || list.getLength() == 0){
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64 throw new Exception("No map node found!");
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65 }
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66 else if(list.getLength() > 1) {
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67 throw new Exception("Found more than one map node." +
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68 " This should never happen!");
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69 }
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70 else {
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71 list.item(0).appendChild(node);
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72 return node;
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73 }
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74 }
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75
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76 /**
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77 * Add a renderer element to the map.
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78 * @param layer The parent layer element.
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79 * @return The renderer element.
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80 */
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81 public Element addRenderer(Element layer) {
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82 Element node = creator.create("renderer");
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83 layer.appendChild(node);
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84 return node;
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85 }
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86
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87 /**
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88 * Add a symbol element to the map.
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89 * @param renderer The parent renderer element.
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90 * @return The symbol element.
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91 */
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92 public Element addSymbol(Element renderer) {
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93 Element node = creator.create("symbol");
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94 renderer.appendChild(node);
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95 return node;
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96 }
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97
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98 /**
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99 * Print out the XML document.
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100 */
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101 public void print() {
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102 XMLUtils.toStream(root, System.out);
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103 }
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104 }
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