Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/GaugeOverviewInfoServiceImpl.java @ 4241:49cb65d5932d

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Improved the historical discharge calculation. The calculation now creates new HistoricalWQKms (new subclass of WQKms). Those WQKms are used to create new facets from (new) type 'HistoricalDischargeCurveFacet'. The chart generator is improved to support those facets.
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 24 Oct 2012 14:34:35 +0200
parents 22cd60315e08
children
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 javax.xml.xpath.XPathConstants;
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5
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6 import org.apache.log4j.Logger;
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7
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8 import org.w3c.dom.Document;
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9 import org.w3c.dom.Element;
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10 import org.w3c.dom.NodeList;
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11
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12 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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13 import de.intevation.artifacts.common.utils.XMLUtils;
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14 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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15 import de.intevation.artifacts.httpclient.http.HttpClient;
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16 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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17
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18 import de.intevation.flys.client.client.services.GaugeOverviewInfoService;
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19 import de.intevation.flys.client.shared.exceptions.ServerException;
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20 import de.intevation.flys.client.shared.model.DefaultGaugeInfo;
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21 import de.intevation.flys.client.shared.model.DefaultRiverInfo;
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22 import de.intevation.flys.client.shared.model.GaugeInfo;
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23 import de.intevation.flys.client.shared.model.RiverInfo;
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24
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25 /**
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26 * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a>
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27 */
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28 public class GaugeOverviewInfoServiceImpl
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29 extends RemoteServiceServlet
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30 implements GaugeOverviewInfoService
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31 {
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32 private static final Logger logger =
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33 Logger.getLogger(GaugeOverviewInfoServiceImpl.class);
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34
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35 public static final String ERROR_NO_RIVERINFO_FOUND =
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36 "error_no_gaugeoverviewinfo_found";
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37
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38 private static final String XPATH_RIVER = "/art:gauge-info/art:river";
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39
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40 private static final String XPATH_GAUGES = "/art:gauge-info/art:gauges/art:gauge";
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41
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42 public RiverInfo getRiverInfo(String river) throws ServerException {
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43 logger.info("RiverInfoServiceImpl.getRiverInfo");
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44
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45 String url = getServletContext().getInitParameter("server-url");
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46
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47 Document doc = XMLUtils.newDocument();
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48
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49 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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50 doc,
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51 ArtifactNamespaceContext.NAMESPACE_URI,
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52 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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53
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54 Element riverele = ec.create("river");
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55 riverele.setTextContent(river);
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56
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57 doc.appendChild(riverele);
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58
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59 HttpClient client = new HttpClientImpl(url);
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60
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61 try {
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62 Document result = client.callService(url, "gaugeoverviewinfo", doc);
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63
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64 Element riverresp = (Element) XMLUtils.xpath(
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65 result,
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66 XPATH_RIVER,
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67 XPathConstants.NODE,
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68 ArtifactNamespaceContext.INSTANCE);
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69
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70 String rname = riverresp.getAttributeNS(
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71 ArtifactNamespaceContext.NAMESPACE_URI, "name");
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72 String rkmup = riverresp.getAttributeNS(
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73 ArtifactNamespaceContext.NAMESPACE_URI, "kmup");
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74 String rstart = riverresp.getAttributeNS(
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75 ArtifactNamespaceContext.NAMESPACE_URI, "start");
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76 String rend = riverresp.getAttributeNS(
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77 ArtifactNamespaceContext.NAMESPACE_URI, "end");
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78 String rwstunit = riverresp.getAttributeNS(
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79 ArtifactNamespaceContext.NAMESPACE_URI, "wstunit");
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80 String rminq = riverresp.getAttributeNS(
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81 ArtifactNamespaceContext.NAMESPACE_URI, "minq");
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82 String rmaxq = riverresp.getAttributeNS(
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83 ArtifactNamespaceContext.NAMESPACE_URI, "maxq");
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84 String rofficial = riverresp.getAttributeNS(
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85 ArtifactNamespaceContext.NAMESPACE_URI, "official");
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86
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87 logger.debug("River is " + rname);
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88
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89 boolean kmup = rkmup.equalsIgnoreCase("true");
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90
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91 NodeList gaugenodes = (NodeList) XMLUtils.xpath(
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92 result,
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93 XPATH_GAUGES,
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94 XPathConstants.NODESET,
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95 ArtifactNamespaceContext.INSTANCE);
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96
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97 int num = gaugenodes == null ? 0 : gaugenodes.getLength();
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98
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99 ArrayList<GaugeInfo> gauges = new ArrayList<GaugeInfo>(num);
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100
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101 if (num == 0) {
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102 logger.warn("No gauge info found.");
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103 }
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104 else {
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105 logger.debug("Found " + num + " gauges.");
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106
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107 for (int i = 0; i < num; i++) {
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108 Element gaugeele = (Element)gaugenodes.item(i);
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109
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110 String gname = gaugeele.getAttributeNS(
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111 ArtifactNamespaceContext.NAMESPACE_URI, "name");
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112 String gstart = gaugeele.getAttributeNS(
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113 ArtifactNamespaceContext.NAMESPACE_URI, "start");
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114 String gend = gaugeele.getAttributeNS(
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115 ArtifactNamespaceContext.NAMESPACE_URI, "end");
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116 String gdatum = gaugeele.getAttributeNS(
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117 ArtifactNamespaceContext.NAMESPACE_URI, "datum");
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118 String gaeo = gaugeele.getAttributeNS(
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119 ArtifactNamespaceContext.NAMESPACE_URI, "aeo");
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120 String gminq = gaugeele.getAttributeNS(
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121 ArtifactNamespaceContext.NAMESPACE_URI, "minq");
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122 String gminw = gaugeele.getAttributeNS(
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123 ArtifactNamespaceContext.NAMESPACE_URI, "minw");
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124 String gmaxq = gaugeele.getAttributeNS(
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125 ArtifactNamespaceContext.NAMESPACE_URI, "maxq");
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126 String gmaxw = gaugeele.getAttributeNS(
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127 ArtifactNamespaceContext.NAMESPACE_URI, "maxw");
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128 String gstation = gaugeele.getAttributeNS(
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129 ArtifactNamespaceContext.NAMESPACE_URI, "station");
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130 String gofficial = gaugeele.getAttributeNS(
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131 ArtifactNamespaceContext.NAMESPACE_URI, "official");
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132
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133 logger.debug("Found gauge with name " + gname);
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134
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135 GaugeInfo gaugeinfo = new DefaultGaugeInfo(
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136 rname,
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137 gname,
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138 kmup,
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139 parseDouble(gstation),
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140 parseDouble(gstart),
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141 parseDouble(gend),
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142 parseDouble(gdatum),
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143 parseDouble(gaeo),
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144 parseDouble(gminq),
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145 parseDouble(gmaxq),
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146 parseDouble(gminw),
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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147 parseDouble(gmaxw),
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148 rwstunit,
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149 parseLong(gofficial)
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150 );
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151
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152 gauges.add(gaugeinfo);
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153 }
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154 }
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155
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156 RiverInfo riverinfo = new DefaultRiverInfo(
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157 rname,
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158 kmup,
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159 parseDouble(rstart),
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160 parseDouble(rend),
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161 rwstunit,
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162 parseDouble(rminq),
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163 parseDouble(rmaxq),
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164 parseLong(rofficial),
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165 gauges);
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166
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167 logger.debug("Finished RiverInfoService.");
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168
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169 return riverinfo;
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170 }
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171 catch (ConnectionException ce) {
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172 logger.error(ce, ce);
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173 }
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174
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175 logger.warn("No gauge found");
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176 throw new ServerException(ERROR_NO_RIVERINFO_FOUND);
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177 }
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178
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179 /**
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180 * Avoids NullPointerException when parsing double value
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181 */
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182 private Double parseDouble(String value) {
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183 if (value == null || value.isEmpty()) {
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184 return null;
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185 }
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186 try {
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187 return Double.valueOf(value);
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188 }
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189 catch(NumberFormatException e) {
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190 logger.error(e, e);
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191 return null;
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192 }
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193 }
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194
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195 private Long parseLong(String value) {
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196 if (value == null || value.isEmpty()) {
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197 return null;
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198 }
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199 try {
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200 return Long.valueOf(value);
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201 }
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202 catch(NumberFormatException e) {
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203 logger.error(e, e);
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204 return null;
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205 }
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206 }
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207 }
http://dive4elements.wald.intevation.org