Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/utils/FLYSUtils.java @ 1651:a7def20539fb

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flys/issue317: Removed dependency from cross section demo app. flys-artifacts/trunk@2840 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 27 Sep 2011 13:45:13 +0000
parents f58be0d661b9
children 8d08f6641372
rev   line source
1095
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
1 package de.intevation.flys.utils;
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2
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5f53b443d67c Implement getArtifact(uuid,context) in FLYSUtils.
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parents: 1129
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3 import org.apache.log4j.Logger;
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4
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5 import java.util.HashMap;
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6 import java.util.Map;
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7
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8 import javax.xml.xpath.XPathConstants;
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9
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10 import org.w3c.dom.Document;
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11
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12 import gnu.trove.TDoubleArrayList;
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13
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14 import de.intevation.artifacts.Artifact;
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15 import de.intevation.artifacts.CallContext;
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16
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17 import de.intevation.artifacts.common.utils.Config;
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18 import de.intevation.artifacts.common.utils.XMLUtils;
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19
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20 import de.intevation.flys.artifacts.FLYSArtifact;
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21 import de.intevation.flys.artifacts.model.RiverFactory;
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22 import de.intevation.flys.model.River;
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23
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24 public class FLYSUtils {
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25
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26 /** The logger that is used in this utility. */
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27 private static Logger logger = Logger.getLogger(FLYSUtils.class);
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28
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29 public static enum KM_MODE { RANGE, LOCATIONS, NONE };
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30
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31 public static final String XPATH_RIVER_PROJECTION =
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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_SHAPEFILE_DIR =
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35 "/artifact-database/floodmap/shapefile-path/@value";
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36
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37 public static final String XPATH_VELOCITY_LOGFILE =
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38 "/artifact-database/floodmap/velocity/logfile/@path";
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39
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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40 public static final String XPATH_MAPSERVER_URL =
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41 "/artifact-database/floodmap/mapserver/server/@path";
da3c3e286c88 Introduced a MapfileGenerator that creates Mapserver specific mapfiles based on WSPLGEN results read from filesystem.
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42
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43 public static final String XPATH_MAPFILE_PATH =
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44 "/artifact-database/floodmap/mapserver/mapfile/@path";
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45
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46 public static final String XPATH_MAPFILE_TEMPLATE =
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47 "/artifact-database/floodmap/mapserver/map-template/@path";
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48
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49 public static final String XPATH_MAPSERVER_TEMPLATE_PATH =
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50 "/artifact-database/floodmap/mapserver/templates/@path";
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51
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52
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53 private FLYSUtils() {
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54 }
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55
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56
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57 public static FLYSArtifact getArtifact(String uuid, CallContext context) {
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58 try {
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59 Artifact artifact = context.getDatabase().getRawArtifact(uuid);
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60
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61 if (artifact == null) {
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62 logger.error("Artifact '" + uuid + "' does not exist.");
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63 return null;
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64 }
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65
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66 if (!(artifact instanceof FLYSArtifact)) {
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67 logger.error("Artifact '" +uuid+ "' is no valid FLYSArtifact.");
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68 return null;
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69 }
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70
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71 return (FLYSArtifact) artifact;
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72 }
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73 // TODO: catch more selective
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74 catch (Exception e) {
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75 logger.error("Cannot get FLYSArtifact " + uuid + " from database (" + e.getMessage() + ").");
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76 return null;
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77 }
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78 }
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79
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80
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81 /**
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82 * Convinience function to retrieve an XPath as string with replaced config
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83 * directory.
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84 *
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85 * @param xpath The XPath expression.
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86 *
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87 * @return a string with replaced config directory.
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88 */
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89 public static String getXPathString(String xpath) {
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90 String tmp = Config.getStringXPath(xpath);
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91 tmp = Config.replaceConfigDir(tmp);
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92
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93 return tmp;
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94 }
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96
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97 public static KM_MODE getKmRangeMode(FLYSArtifact flys) {
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98 String mode = flys.getDataAsString("ld_mode");
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99
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100 if (mode == null || mode.length() == 0) {
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101 return KM_MODE.NONE;
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102 }
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103 else if (mode.equals("distance")) {
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104 return KM_MODE.RANGE;
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105 }
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106 else if (mode.equals("locations")) {
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107 return KM_MODE.LOCATIONS;
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108 }
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109 else {
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110 return KM_MODE.NONE;
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111 }
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112 }
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113
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114
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115 public static double[] getKmRange(FLYSArtifact flys) {
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116 switch (getKmRangeMode(flys)) {
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117 case RANGE: {
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118 return getKmFromTo(flys);
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119 }
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120
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121 case LOCATIONS: {
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122 double[] locs = getLocations(flys);
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123 return new double[] { locs[0], locs[locs.length-1] };
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124 }
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125
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126 case NONE: {
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127 double[] locs = getLocations(flys);
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128 if (locs != null) {
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129 return new double[] { locs[0], locs[locs.length-1] };
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130 }
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131 else {
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132 return getKmFromTo(flys);
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133 }
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134 }
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135 }
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136
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137 return new double[] { Double.NaN, Double.NaN };
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138 }
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139
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140
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141 public static double[] getKmFromTo(FLYSArtifact flys) {
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142 String strFrom = flys.getDataAsString("ld_from");
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143 String strTo = flys.getDataAsString("ld_to");
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144
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145 if (strFrom == null || strTo == null) {
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146 return null;
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147 }
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148
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149 try {
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150 return new double[] {
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151 Double.parseDouble(strFrom),
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152 Double.parseDouble(strTo) };
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153 }
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154 catch (NumberFormatException nfe) {
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155 return null;
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156 }
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157 }
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158
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159
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160 public static double[] getLocations(FLYSArtifact flys) {
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161 String locationStr = flys.getDataAsString("ld_locations");
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162
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163 if (locationStr == null || locationStr.length() == 0) {
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164 return null;
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165 }
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166
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167 String[] tmp = locationStr.split(" ");
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168 TDoubleArrayList locations = new TDoubleArrayList();
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169
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170 for (String l: tmp) {
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171 try {
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172 locations.add(Double.parseDouble(l));
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173 }
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174 catch (NumberFormatException nfe) {
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175 }
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176 }
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177
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178 locations.sort();
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179
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180 return locations.toNativeArray();
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181 }
1099
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182
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183
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184 /**
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185 * Returns the selected River object based on the 'river' data that might
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186 * have been inserted by the user.
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187 *
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188 * @return the selected River or null if no river has been chosen yet.
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189 */
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190 public static River getRiver(FLYSArtifact flys) {
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191 String sRiver = flys.getDataAsString("river");
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192
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193 return (sRiver != null)
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194 ? RiverFactory.getRiver(sRiver)
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195 : null;
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196 }
1105
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197
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198
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199 /**
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200 * Extracts the SRID defined in the global configuration for the river
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201 * specified in <i>artifact</i>.
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202 *
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203 * @param artifact The FLYSArtifact that stores the name of the river.
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204 *
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205 * @return the SRID as string (e.g. "31466").
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206 */
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207 public static String getRiverSrid(FLYSArtifact artifact) {
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208 String river = artifact.getDataAsString("river");
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209
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210 if (river == null || river.length() == 0) {
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211 return null;
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212 }
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213
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214 Map<String, String> variables = new HashMap<String, String>(1);
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215 variables.put("name", river);
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216
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217 Document cfg = Config.getConfig();
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218
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219 return (String) XMLUtils.xpath(
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220 cfg,
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221 XPATH_RIVER_PROJECTION,
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diff changeset
222 XPathConstants.STRING,
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diff changeset
223 null,
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224 variables);
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diff changeset
225 }
1095
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226 }
1105
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227 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org