Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MapInfoService.java @ 3224:075f1ba25758

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issue654 flys-artifacts/trunk@4850 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Mon, 02 Jul 2012 13:46:12 +0000
parents 5642a83420f2
children eb9f7fd77edf
rev   line source
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c37084f31c84 Implemented a MapInfo service that returns some basic information to create maps for specific rivers.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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1 package de.intevation.flys.artifacts.services;
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2
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3 import org.apache.log4j.Logger;
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4
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5 import java.util.Map;
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6 import java.util.HashMap;
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7
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8 import org.w3c.dom.Document;
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9 import org.w3c.dom.Node;
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10 import org.w3c.dom.Element;
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11
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12 import javax.xml.xpath.XPathConstants;
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13
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14 import com.vividsolutions.jts.geom.Envelope;
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15
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16 import de.intevation.artifacts.CallMeta;
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17 import de.intevation.artifacts.GlobalContext;
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18
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19 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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20 import de.intevation.artifacts.common.utils.Config;
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21 import de.intevation.artifacts.common.utils.XMLUtils;
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22 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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23
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24 import de.intevation.artifactdatabase.XMLService;
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25
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26 import de.intevation.flys.model.River;
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27
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28 import de.intevation.flys.utils.GeometryUtils;
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29
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30 /**
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31 * This service provides information about the supported rivers by this
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32 * application.
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33 *
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34 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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35 */
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36 public class MapInfoService extends XMLService {
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37
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38 /** XPath that points to the river.*/
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39 public static final String XPATH_RIVER = "/mapinfo/river/text()";
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40
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41 public static final String XPATH_RIVER_PROJECTION =
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42 "/artifact-database/floodmap/river[@name=$river]/srid/@value";
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43
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44 public static final String XPATH_RIVER_BACKGROUND =
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45 "/artifact-database/floodmap/river[@name='%RIVER%']/background-wms";
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46
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47 public static final String XPATH_RIVER_WMS =
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48 "/artifact-database/floodmap/river[@name=$river]/river-wms/@url";
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49
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50
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51 /** The logger used in this service.*/
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52 private static Logger logger = Logger.getLogger(MapInfoService.class);
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53
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54
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55 /**
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56 * The default constructor.
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57 */
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58 public MapInfoService() {
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59 }
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60
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61 protected static String getStringXPath(
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62 String query,
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63 Map<String, String> variables
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64 ) {
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65 return (String)XMLUtils.xpath(
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66 Config.getConfig(), query, XPathConstants.STRING,
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67 null, variables);
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68 }
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69
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70 protected static Node getNodeXPath(
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71 String query,
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72 Map<String, String> variables
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73 ) {
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74 return (Node)XMLUtils.xpath(
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75 Config.getConfig(), query, XPathConstants.NODE,
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76 null, variables);
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77 }
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78
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79 @Override
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80 public Document processXML(
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81 Document data,
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82 GlobalContext globalContext,
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83 CallMeta callMeta
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84 ) {
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85 logger.debug("MapInfoService.process");
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86
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87 Document result = XMLUtils.newDocument();
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88 ElementCreator cr = new ElementCreator(result, null, null);
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89
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90 Element mapinfo = cr.create("mapinfo");
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91 result.appendChild(mapinfo);
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92
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93 String river = extractRiver(data);
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94 if (river == null || river.length() == 0) {
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95 logger.warn("Cannot generate information: river is empty!");
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96 return result;
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97 }
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98
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99 Element root = cr.create("river");
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100 cr.addAttr(root, "name", river);
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101 mapinfo.appendChild(root);
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102
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103 Envelope env = GeometryUtils.getRiverBoundary(river);
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104 if (env != null) {
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105 String bounds = GeometryUtils.jtsBoundsToOLBounds(env);
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106 logger.debug("River '" + river + "' bounds: " + bounds);
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107
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108 Element bbox = cr.create("bbox");
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109 cr.addAttr(bbox, "value", bounds);
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110 root.appendChild(bbox);
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111 }
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112
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113 Map<String, String> vars = new HashMap<String, String>();
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114 vars.put("river", river);
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115
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116 String sridStr = getStringXPath(XPATH_RIVER_PROJECTION, vars);
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117
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118 if (sridStr != null && sridStr.length() > 0) {
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119 Element srid = cr.create("srid");
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120 cr.addAttr(srid, "value", sridStr);
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121 root.appendChild(srid);
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122 }
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123
2098
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124 Element back = (Element)getNodeXPath(XPATH_RIVER_BACKGROUND, vars);
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125 if (back != null) {
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126 Element background = cr.create("background-wms");
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127 cr.addAttr(background, "url", back.getAttribute("url"));
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128 cr.addAttr(background, "layers", back.getAttribute("layers"));
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129 root.appendChild(background);
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130 }
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131
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132 String wmsStr = getStringXPath(XPATH_RIVER_WMS, vars);
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133 if (wmsStr != null && wmsStr.length() > 0) {
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134 Element wms = cr.create("river-wms");
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135 cr.addAttr(wms, "url", wmsStr);
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136 root.appendChild(wms);
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137 }
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138
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139 return result;
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140 }
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141
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142
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143 protected String extractRiver(Document data) {
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144 return XMLUtils.xpathString(
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145 data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
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146 }
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147 }
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148 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org