annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/WMSBackgroundState.java @ 1926:fde3db5e68e8

Added a new Artifact to enable users to add external WMS layers to floodmaps. flys-artifacts/trunk@3302 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 22 Nov 2011 20:04:46 +0000
parents 7f5426c69ee0
children 453d2d0c4258
rev   line source
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1 package de.intevation.flys.artifacts.states;
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2
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3 import java.util.HashMap;
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4 import java.util.List;
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5 import java.util.Map;
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6
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7 import javax.xml.xpath.XPathConstants;
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8
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9 import org.apache.log4j.Logger;
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10
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11 import org.w3c.dom.Document;
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12 import org.w3c.dom.Node;
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13
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14 import de.intevation.artifacts.CallMeta;
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15
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16 import de.intevation.artifacts.common.utils.Config;
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17 import de.intevation.artifacts.common.utils.XMLUtils;
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18
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19 import de.intevation.artifactdatabase.state.Facet;
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20
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21 import de.intevation.flys.artifacts.FLYSArtifact;
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22 import de.intevation.flys.artifacts.model.WMSLayerFacet;
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23 import de.intevation.flys.artifacts.resources.Resources;
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24 import de.intevation.flys.artifacts.states.DefaultState.ComputeType;
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25
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27 public class WMSBackgroundState extends OutputState {
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28
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29 public static final String I18N_DESCRIPTION = "floodmap.wmsbackground";
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30
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31 public static final String XPATH_SRID =
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32 "/artifact-database/floodmap/river[@name=$name]/srid/@value";
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33
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34 public static final String XPATH_WMS_URL =
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35 "/artifact-database/floodmap/river[@name=$name]/background-wms/@url";
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36
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37 public static final String XPATH_WMS_LAYER =
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38 "/artifact-database/floodmap/river[@name=$name]/background-wms/@layers";
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39
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40
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41 protected String url;
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42 protected String layer;
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43 protected String srid;
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44
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45 protected Document cfg;
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46
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47 protected Map<String, String> variables;
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48
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50 private static final Logger logger = Logger.getLogger(WMSBackgroundState.class);
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51
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52
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53 @Override
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54 public void setup(Node config) {
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55 super.setup(config);
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56
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57 logger.debug("WMSBackgroundState.setup()");
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58 }
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59
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60
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61 @Override
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62 public Object computeInit(
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63 FLYSArtifact artifact,
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64 String hash,
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65 Object context,
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66 CallMeta meta,
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67 List<Facet> facets
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68 ) {
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69 logger.debug("WMSBackgroundState.computeInit()");
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70
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71 initVariables(artifact);
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72
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73 if (url == null || layer == null) {
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74 // XXX I don't remember why 'srid', 'url' and 'layer' are member
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75 // variables. I think the reason was buffering those values.
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76 srid = getSrid();
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77 url = getUrl();
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78 layer = getLayer();
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79 }
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80
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81 if (url == null || layer == null) {
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82 logger.warn("No background layers currently configured:");
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83 logger.warn("... add config for WMS url: " + XPATH_WMS_URL);
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84 logger.warn("... add config for WMS layer: " + XPATH_WMS_LAYER);
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85 return null;
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86 }
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87
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88 WMSLayerFacet facet = new WMSLayerFacet(
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89 0,
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90 getFacetType(),
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91 getTitle(meta),
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92 ComputeType.INIT,
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93 getID(), hash,
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94 url);
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95
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96 facet.addLayer(layer);
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97 facet.setSrid(srid);
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98
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99 facets.add(facet);
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100
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101 return null;
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102 }
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103
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104
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105 protected Document getConfig() {
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106 if (cfg == null) {
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107 cfg = Config.getConfig();
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108 }
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109
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110 return cfg;
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111 }
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112
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113
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114 protected void initVariables(FLYSArtifact artifact) {
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115 String river = artifact.getDataAsString("river");
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116
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117 variables = new HashMap<String, String>();
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118 variables.put("name", river);
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119 }
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120
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121
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122 protected String getFacetType() {
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123 return FLOODMAP_WMSBACKGROUND;
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124 }
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125
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126
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127 protected String getSrid() {
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128 return (String) XMLUtils.xpath(
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129 getConfig(),
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130 XPATH_SRID,
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131 XPathConstants.STRING,
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132 null,
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133 variables);
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134 }
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135
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136
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137 protected String getUrl() {
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138 return (String) XMLUtils.xpath(
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139 getConfig(),
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140 XPATH_WMS_URL,
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141 XPathConstants.STRING,
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142 null,
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143 variables);
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144 }
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145
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146
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147 protected String getLayer() {
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148 return (String) XMLUtils.xpath(
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149 getConfig(),
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150 XPATH_WMS_LAYER,
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151 XPathConstants.STRING,
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152 null,
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153 variables);
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154 }
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155
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156
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157 protected String getTitle(CallMeta meta) {
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158 return Resources.getMsg(meta, I18N_DESCRIPTION, I18N_DESCRIPTION);
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159 }
942
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160 }
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161 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

http://dive4elements.wald.intevation.org