Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/GaugeOverviewInfoServiceImpl.java @ 3847:f3b821735e39

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Calculate the info url via i18n Don't fetch the info url from the artifact service and use i18n to calculate the url by using the official gauge and river number. flys-client/trunk@5582 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Bjoern Ricks <bjoern.ricks@intevation.de>
date Mon, 24 Sep 2012 08:39:22 +0000
parents 8e169e4e1b57
children c434dd2e84cf
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 gname,
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137 kmup,
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138 parseDouble(gstation),
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139 parseDouble(gstart),
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140 parseDouble(gend),
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141 parseDouble(gdatum),
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142 parseDouble(gaeo),
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143 parseDouble(gminq),
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144 parseDouble(gmaxq),
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145 parseDouble(gminw),
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dc505433173f Use the wstunit from the river as unit for the Pegelnullpunkt
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146 parseDouble(gmaxw),
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147 rwstunit,
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148 parseLong(gofficial)
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149 );
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150
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151 gauges.add(gaugeinfo);
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152 }
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153 }
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154
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155 RiverInfo riverinfo = new DefaultRiverInfo(
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156 rname,
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157 kmup,
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158 parseDouble(rstart),
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159 parseDouble(rend),
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160 rwstunit,
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161 parseDouble(rminq),
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162 parseDouble(rmaxq),
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163 parseLong(rofficial),
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164 gauges);
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165
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166 logger.debug("Finished RiverInfoService.");
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167
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168 return riverinfo;
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169 }
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170 catch (ConnectionException ce) {
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171 logger.error(ce, ce);
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172 }
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173
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174 logger.warn("No gauge found");
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175 throw new ServerException(ERROR_NO_RIVERINFO_FOUND);
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176 }
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177
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178 /**
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179 * Avoids NullPointerException when parsing double value
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180 */
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181 private Double parseDouble(String value) {
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182 if (value == null || value.isEmpty()) {
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183 return null;
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184 }
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185 try {
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186 return Double.valueOf(value);
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187 }
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188 catch(NumberFormatException e) {
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189 logger.error(e, e);
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190 return null;
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191 }
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192 }
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193
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194 private Long parseLong(String value) {
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195 if (value == null || value.isEmpty()) {
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196 return null;
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197 }
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198 try {
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199 return Long.valueOf(value);
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200 }
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201 catch(NumberFormatException e) {
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202 logger.error(e, e);
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203 return null;
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204 }
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205 }
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206 }
http://dive4elements.wald.intevation.org