Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/RiverInfoServiceImpl.java @ 4250:ef154fbf58f1

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Add method to get the MeasurementStations from the RiverInfoService Also refactor the RiverInfoServiceImpl to use common code for getting GaugeInfo and MeasurementStations.
author Björn Ricks <bjoern.ricks@intevation.de>
date Wed, 24 Oct 2012 17:09:04 +0200
parents flys-client/src/main/java/de/intevation/flys/client/server/GaugeOverviewInfoServiceImpl.java@22cd60315e08
children 06d9098a609a
rev   line source
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1 package de.intevation.flys.client.server;
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2
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3 import java.util.ArrayList;
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4 import java.util.List;
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5 import javax.xml.xpath.XPathConstants;
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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 org.w3c.dom.Document;
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10 import org.w3c.dom.Element;
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11 import org.w3c.dom.NodeList;
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12
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13 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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14 import de.intevation.artifacts.common.utils.XMLUtils;
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15 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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16 import de.intevation.artifacts.httpclient.http.HttpClient;
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17 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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18
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19 import de.intevation.flys.client.client.services.RiverInfoService;
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20 import de.intevation.flys.client.shared.exceptions.ServerException;
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21 import de.intevation.flys.client.shared.model.DefaultGaugeInfo;
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22 import de.intevation.flys.client.shared.model.DefaultMeasurementStation;
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23 import de.intevation.flys.client.shared.model.DefaultRiverInfo;
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24 import de.intevation.flys.client.shared.model.GaugeInfo;
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25 import de.intevation.flys.client.shared.model.MeasurementStation;
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26 import de.intevation.flys.client.shared.model.RiverInfo;
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27
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28
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29 /**
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30 * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a>
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31 */
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32 public class RiverInfoServiceImpl
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33 extends RemoteServiceServlet
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34 implements RiverInfoService
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35 {
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36 private static final Logger logger =
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37 Logger.getLogger(RiverInfoServiceImpl.class);
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38
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39 public static final String ERROR_NO_RIVER_INFO_FOUND =
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40 "error_no_riverinfo_found";
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41
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42 private static final String XPATH_RIVER =
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43 "/art:river-info/art:river";
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44
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45 private static final String XPATH_STATIONS =
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46 "/art:river-info/art:measurement-stations/art:measurement-station";
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47
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48 private static final String XPATH_GAUGES = "/art:river-info/art:gauges/art:gauge";
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49
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50 public RiverInfo getGauges(String river) throws ServerException {
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51 logger.info("RiverInfoServiceImpl.getRiverInfo");
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52
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53 String url = getServletContext().getInitParameter("server-url");
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54
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55 Document doc = XMLUtils.newDocument();
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56
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57 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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58 doc,
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59 ArtifactNamespaceContext.NAMESPACE_URI,
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60 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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61
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62 Element riverele = ec.create("river");
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63 riverele.setTextContent(river);
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64
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65 doc.appendChild(riverele);
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66
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67 HttpClient client = new HttpClientImpl(url);
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68
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69 try {
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70 Document result = client.callService(url, "gaugeoverviewinfo", doc);
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71
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72 DefaultRiverInfo riverinfo = getRiverInfo(result);
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73 List<GaugeInfo>gauges = createGauges(result, riverinfo.getName(),
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74 riverinfo.isKmUp(), riverinfo.getWstUnit());
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75
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76
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77 riverinfo.setGauges(gauges);
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78
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79 logger.debug("Finished RiverInfoService.getGauges.");
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80
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81 return riverinfo;
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82 }
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83 catch (ConnectionException ce) {
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84 logger.error(ce, ce);
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85 }
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86
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87 logger.warn("No gauge found");
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88 throw new ServerException(ERROR_NO_RIVER_INFO_FOUND);
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89 }
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90
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91 public RiverInfo getMeasurementStations(String river) throws ServerException {
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92 logger.info("RiverInfoServiceImpl.getMeasurementStations");
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93
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94 String url = getServletContext().getInitParameter("server-url");
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95
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96 Document doc = XMLUtils.newDocument();
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97
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98 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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99 doc,
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100 ArtifactNamespaceContext.NAMESPACE_URI,
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101 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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102
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103 Element riverele = ec.create("river");
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104 riverele.setTextContent(river);
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105
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106 doc.appendChild(riverele);
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107
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108 HttpClient client = new HttpClientImpl(url);
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109
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110 try {
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111 Document result = client.callService(url, "measurementstationinfo", doc);
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112
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113 DefaultRiverInfo riverinfo = getRiverInfo(result);
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114 List<MeasurementStation> mstations = createMeasurementStations(
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115 result, riverinfo.getName());
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116
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117 riverinfo.setMeasurementStations(mstations);
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118
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119 logger.debug("Finished MeasurementStationInfoService.");
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120
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121 return riverinfo;
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122 }
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123 catch (ConnectionException ce) {
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124 logger.error(ce, ce);
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125 }
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126
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127 logger.warn("No measurement station found");
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128 throw new ServerException(ERROR_NO_RIVER_INFO_FOUND);
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129 }
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130
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131 /**
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132 * Avoids NullPointerException when parsing double value
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133 */
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134 private Double parseDouble(String value) {
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135 if (value == null || value.isEmpty()) {
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136 return null;
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parents:
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137 }
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parents:
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138 try {
79ad33f41977 Implement a gauge service
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parents:
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139 return Double.valueOf(value);
79ad33f41977 Implement a gauge service
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parents:
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140 }
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parents:
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141 catch(NumberFormatException e) {
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142 logger.error(e, e);
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143 return null;
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parents:
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144 }
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parents:
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145 }
3843
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146
8e169e4e1b57 Add the official gauge number to the GaugeInfo class
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147 private Long parseLong(String value) {
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148 if (value == null || value.isEmpty()) {
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149 return null;
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150 }
8e169e4e1b57 Add the official gauge number to the GaugeInfo class
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diff changeset
151 try {
8e169e4e1b57 Add the official gauge number to the GaugeInfo class
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152 return Long.valueOf(value);
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parents: 3838
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153 }
8e169e4e1b57 Add the official gauge number to the GaugeInfo class
Bjoern Ricks <bjoern.ricks@intevation.de>
parents: 3838
diff changeset
154 catch(NumberFormatException e) {
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155 logger.error(e, e);
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156 return null;
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157 }
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parents: 3838
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158 }
4250
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159
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160 private List<MeasurementStation> createMeasurementStations(
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161 Document result, String rivername) {
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162 NodeList stationnodes = (NodeList) XMLUtils.xpath(
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163 result,
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164 XPATH_STATIONS,
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165 XPathConstants.NODESET,
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166 ArtifactNamespaceContext.INSTANCE);
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167
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168 int num = stationnodes == null ? 0 : stationnodes.getLength();
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169
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170 ArrayList<MeasurementStation> mstations = new ArrayList<MeasurementStation>(num);
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171
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172 if (num == 0) {
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173 logger.warn("No measurement station found.");
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174 }
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175 else {
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176 logger.debug("Found " + num + " measurement stations.");
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177
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178 for (int i = 0; i < num; i++) {
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179 Element stationele = (Element)stationnodes.item(i);
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180
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181 String mname = stationele.getAttributeNS(
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182 ArtifactNamespaceContext.NAMESPACE_URI, "name");
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183 String mstart = stationele.getAttributeNS(
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184 ArtifactNamespaceContext.NAMESPACE_URI, "start");
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185 String mend = stationele.getAttributeNS(
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186 ArtifactNamespaceContext.NAMESPACE_URI, "end");
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187 String mstation = stationele.getAttributeNS(
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188 ArtifactNamespaceContext.NAMESPACE_URI, "station");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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189 String mtype = stationele.getAttributeNS(
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parents: 3974
diff changeset
190 ArtifactNamespaceContext.NAMESPACE_URI, "type");
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191 String riverside = stationele.getAttributeNS(
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diff changeset
192 ArtifactNamespaceContext.NAMESPACE_URI, "riverside");
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193
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diff changeset
194 logger.debug("Found measurement station with name " + mname);
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195
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196 MeasurementStation station = new DefaultMeasurementStation(
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197 rivername,
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diff changeset
198 mname,
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diff changeset
199 parseDouble(mstation),
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diff changeset
200 parseDouble(mstart),
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
201 parseDouble(mend),
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
202 riverside,
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parents: 3974
diff changeset
203 mtype
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diff changeset
204 );
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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diff changeset
205
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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diff changeset
206 mstations.add(station);
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diff changeset
207 }
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diff changeset
208 }
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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diff changeset
209 return mstations;
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diff changeset
210 }
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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diff changeset
211
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diff changeset
212 private List<GaugeInfo> createGauges(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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parents: 3974
diff changeset
213 Document result, String rivername, Boolean kmup, String rwstunit) {
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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parents: 3974
diff changeset
214 NodeList gaugenodes = (NodeList) XMLUtils.xpath(
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parents: 3974
diff changeset
215 result,
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
216 XPATH_GAUGES,
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
217 XPathConstants.NODESET,
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
218 ArtifactNamespaceContext.INSTANCE);
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
219
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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diff changeset
220 int num = gaugenodes == null ? 0 : gaugenodes.getLength();
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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diff changeset
221
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
222 ArrayList<GaugeInfo> gauges = new ArrayList<GaugeInfo>(num);
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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parents: 3974
diff changeset
223
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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parents: 3974
diff changeset
224 if (num == 0) {
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parents: 3974
diff changeset
225 logger.warn("No gauge info found.");
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parents: 3974
diff changeset
226 }
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Björn Ricks <bjoern.ricks@intevation.de>
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diff changeset
227 else {
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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diff changeset
228 logger.debug("Found " + num + " gauges.");
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diff changeset
229
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diff changeset
230 for (int i = 0; i < num; i++) {
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parents: 3974
diff changeset
231 Element gaugeele = (Element)gaugenodes.item(i);
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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diff changeset
232
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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diff changeset
233 String gname = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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parents: 3974
diff changeset
234 ArtifactNamespaceContext.NAMESPACE_URI, "name");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
235 String gstart = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
236 ArtifactNamespaceContext.NAMESPACE_URI, "start");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
237 String gend = gaugeele.getAttributeNS(
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
238 ArtifactNamespaceContext.NAMESPACE_URI, "end");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
239 String gdatum = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
240 ArtifactNamespaceContext.NAMESPACE_URI, "datum");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
241 String gaeo = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
242 ArtifactNamespaceContext.NAMESPACE_URI, "aeo");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
243 String gminq = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
244 ArtifactNamespaceContext.NAMESPACE_URI, "minq");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
245 String gminw = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
246 ArtifactNamespaceContext.NAMESPACE_URI, "minw");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
247 String gmaxq = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
248 ArtifactNamespaceContext.NAMESPACE_URI, "maxq");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
249 String gmaxw = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
250 ArtifactNamespaceContext.NAMESPACE_URI, "maxw");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
251 String gstation = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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parents: 3974
diff changeset
252 ArtifactNamespaceContext.NAMESPACE_URI, "station");
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
253 String gofficial = gaugeele.getAttributeNS(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
254 ArtifactNamespaceContext.NAMESPACE_URI, "official");
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
255
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
256 logger.debug("Found gauge with name " + gname);
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
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parents: 3974
diff changeset
257
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
258 GaugeInfo gaugeinfo = new DefaultGaugeInfo(
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
259 rivername,
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
260 gname,
ef154fbf58f1 Add method to get the MeasurementStations from the RiverInfoService
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
261 kmup,
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
262 parseDouble(gstation),
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
263 parseDouble(gstart),
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
264 parseDouble(gend),
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
265 parseDouble(gdatum),
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 3974
diff changeset
266 parseDouble(gaeo),
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267 parseDouble(gminq),
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268 parseDouble(gmaxq),
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269 parseDouble(gminw),
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270 parseDouble(gmaxw),
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271 rwstunit,
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272 parseLong(gofficial)
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273 );
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274
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275 gauges.add(gaugeinfo);
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276 }
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277 }
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278 return gauges;
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279 }
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280
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281 private DefaultRiverInfo getRiverInfo(Document result) {
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282 Element riverresp = (Element) XMLUtils.xpath(
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283 result,
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284 XPATH_RIVER,
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285 XPathConstants.NODE,
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286 ArtifactNamespaceContext.INSTANCE);
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287
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288 String rname = riverresp.getAttributeNS(
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289 ArtifactNamespaceContext.NAMESPACE_URI, "name");
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290 String rkmup = riverresp.getAttributeNS(
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291 ArtifactNamespaceContext.NAMESPACE_URI, "kmup");
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292 String rstart = riverresp.getAttributeNS(
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293 ArtifactNamespaceContext.NAMESPACE_URI, "start");
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294 String rend = riverresp.getAttributeNS(
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295 ArtifactNamespaceContext.NAMESPACE_URI, "end");
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296 String rwstunit = riverresp.getAttributeNS(
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297 ArtifactNamespaceContext.NAMESPACE_URI, "wstunit");
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298 String rminq = riverresp.getAttributeNS(
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299 ArtifactNamespaceContext.NAMESPACE_URI, "minq");
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300 String rmaxq = riverresp.getAttributeNS(
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301 ArtifactNamespaceContext.NAMESPACE_URI, "maxq");
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302 String rofficial = riverresp.getAttributeNS(
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303 ArtifactNamespaceContext.NAMESPACE_URI, "official");
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304
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305 logger.debug("River is " + rname);
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306
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307 boolean kmup = rkmup.equalsIgnoreCase("true");
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308 DefaultRiverInfo riverinfo = new DefaultRiverInfo(
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309 rname,
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310 kmup,
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311 parseDouble(rstart),
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312 parseDouble(rend),
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313 rwstunit,
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314 parseDouble(rminq),
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315 parseDouble(rmaxq),
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316 parseLong(rofficial)
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317 );
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318
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319 return riverinfo;
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320 }
3713
79ad33f41977 Implement a gauge service
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321 }
http://dive4elements.wald.intevation.org