Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/WMSLineArtifact.java @ 3301:c8f670ae96e8

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Create extent of a map layer in the correct coordinate reference system. flys-artifacts/trunk@4986 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 13 Jul 2012 10:25:24 +0000
parents 0ca00d547f35
children b0ba96bbf01d
rev   line source
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ec458853f560 Added new WMSLineArtifact for displaying lines in maps.
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1 package de.intevation.flys.artifacts;
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2
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3 import java.util.List;
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4
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5 import org.w3c.dom.Document;
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6
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7 import org.apache.log4j.Logger;
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8
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9 import com.vividsolutions.jts.geom.Envelope;
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10
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11 import de.intevation.artifacts.ArtifactFactory;
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12 import de.intevation.artifacts.CallMeta;
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13
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14 import de.intevation.artifactdatabase.state.DefaultOutput;
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15 import de.intevation.artifactdatabase.state.Facet;
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16 import de.intevation.artifactdatabase.state.State;
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17
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18 import de.intevation.flys.model.River;
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19 import de.intevation.flys.model.Line;
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20
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21 import de.intevation.flys.artifacts.model.FacetTypes;
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22 import de.intevation.flys.artifacts.model.RiverFactory;
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23 import de.intevation.flys.utils.FLYSUtils;
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24 import de.intevation.flys.utils.GeometryUtils;
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25
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26
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27 public class WMSLineArtifact extends WMSDBArtifact {
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28
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29 public static final String NAME = "lines";
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30
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31
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32 private static final Logger logger =
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33 Logger.getLogger(WMSLineArtifact.class);
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34
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35
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36 @Override
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37 public void setup(
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38 String identifier,
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39 ArtifactFactory factory,
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40 Object context,
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41 CallMeta callMeta,
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42 Document data)
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43 {
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44 logger.debug("WMSLineArtifact.setup");
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45
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46 super.setup(identifier, factory, context, callMeta, data);
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47 }
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48
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49
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50 @Override
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51 public String getName() {
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52 return NAME;
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53 }
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55
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56 @Override
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57 public State getCurrentState(Object cc) {
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58 State s = new LineState(this);
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59
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60 List<Facet> fs = facets.get(getCurrentStateId());
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61
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62 DefaultOutput o = new DefaultOutput(
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63 "floodmap",
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64 "floodmap",
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65 "image/png",
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66 fs,
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67 "map");
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68
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69 s.getOutputs().add(o);
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70
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71 return s;
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72 }
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73
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74
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75 public static class LineState extends WMSDBState implements FacetTypes
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76 {
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77 private static final Logger logger =
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78 Logger.getLogger(LineState.class);
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79
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80 protected int riverId;
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81
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82 public LineState(WMSDBArtifact artifact) {
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83 super(artifact);
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84 riverId = 0;
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85 }
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86
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87 public int getRiverId() {
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88 if (riverId == 0) {
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89 String ids = artifact.getDataAsString("ids");
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90 String[] parts = ids.split(";");
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91
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92 try {
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93 riverId = Integer.valueOf(parts[0]);
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94 }
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95 catch (NumberFormatException nfe) {
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96 logger.error("Cannot parse river id from '" + parts[0] + "'");
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97 }
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98 }
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99
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100 return riverId;
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101 }
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102
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103 @Override
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104 protected String getFacetType() {
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105 return FLOODMAP_LINES;
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106 }
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107
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108 @Override
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109 protected String getUrl() {
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110 return FLYSUtils.getUserWMSUrl(artifact.identifier());
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111 }
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112
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113 @Override
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114 protected String getSrid() {
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115 River river = RiverFactory.getRiver(getRiverId());
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116 return FLYSUtils.getRiverSrid(river.getName());
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117 }
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118
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119 @Override
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120 protected Envelope getExtent() {
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121 List<Line> lines = Line.getLines(getRiverId(), getName());
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122
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123 Envelope max = null;
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124
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125 for (Line l: lines) {
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126 Envelope env = l.getGeom().getEnvelopeInternal();
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127
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128 if (max == null) {
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129 max = env;
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130 continue;
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131 }
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132
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133 max.expandToInclude(env);
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134 }
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135
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136 return max != null
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137 ? GeometryUtils.transform(max, getSrid())
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138 : max;
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139 }
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140
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141 @Override
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142 protected String getFilter() {
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143 return "river_id=" + String.valueOf(getRiverId()) +
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144 " AND name='" + getName() + "'";
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145 }
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146
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147 @Override
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148 protected String getDataString() {
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149 String srid = getSrid();
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150
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151 if (FLYSUtils.isUsingOracle()) {
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152 return "geom FROM lines USING SRID " + srid;
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153 }
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154 else {
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155 return "geom FROM lines USING UNIQUE id USING SRID " + srid;
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156 }
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157 }
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158
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159 @Override
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160 protected String getGeometryType() {
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161 return "LINE";
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162 }
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163 } // end of WMSKmState
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164 }
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165 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org