Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MainValuesService.java @ 670:8124ca1ecaaa
Berechnung 4: Added more debug output
flys-artifacts/trunk@2089 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 08 Jun 2011 18:50:40 +0000 |
parents | 932a5e3c7fa1 |
children | a63d79107289 |
rev | line source |
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1 package de.intevation.flys.artifacts.services; |
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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.apache.log4j.Logger; |
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6 |
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7 import org.w3c.dom.Document; |
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8 import org.w3c.dom.Element; |
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9 |
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10 import org.hibernate.Session; |
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11 |
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12 import de.intevation.artifacts.CallMeta; |
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13 |
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14 import de.intevation.artifactdatabase.DefaultService; |
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15 |
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16 import de.intevation.artifacts.common.ArtifactNamespaceContext; |
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17 import de.intevation.artifacts.common.utils.XMLUtils; |
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18 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; |
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19 |
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20 import de.intevation.flys.backend.SessionHolder; |
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21 import de.intevation.flys.model.Gauge; |
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22 import de.intevation.flys.model.MainValue; |
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23 import de.intevation.flys.model.MainValueType; |
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24 import de.intevation.flys.model.NamedMainValue; |
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25 import de.intevation.flys.model.Range; |
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26 import de.intevation.flys.model.River; |
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27 |
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28 import de.intevation.flys.artifacts.model.MainValuesFactory; |
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29 import de.intevation.flys.artifacts.model.RiverFactory; |
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30 |
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31 |
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32 /** |
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33 * This service returns the main values of a river's gauge based on the start |
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34 * and end point of the river. |
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35 * |
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36 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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37 */ |
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38 public class MainValuesService extends DefaultService { |
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39 |
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40 /** The logger that is used by this service.*/ |
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41 private static Logger logger = Logger.getLogger(MainValuesService.class); |
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42 |
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43 |
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44 /** The XPath that points to the river definition of the incoming request.*/ |
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45 public static final String XPATH_RIVER = "/art:mainvalues/art:river/text()"; |
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46 |
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47 /** The XPath that points to the start definition of the incoming request.*/ |
444
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ISSUE-72 Repaired broken XPath expression in MainValuesService to extract start and end kilometer.
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48 public static final String XPATH_START = "/art:mainvalues/art:start/text()"; |
331
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49 |
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50 /** The XPath that points to the end definition of the incoming request.*/ |
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51 public static final String XPATH_END = "/art:mainvalues/art:end/text()"; |
331
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52 |
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53 /** |
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54 * The default constructor. |
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55 */ |
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56 public MainValuesService() { |
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57 } |
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58 |
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59 |
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60 public Document process( |
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61 Document data, |
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62 Object context, |
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63 CallMeta callMeta) |
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64 { |
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65 logger.debug("MainValuesService.process"); |
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66 |
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67 try { |
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68 River river = getRequestedRiver(data); |
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69 double[] minmax = getRequestedStartEnd(data, river); |
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70 Gauge gauge = river.determineGauge(minmax[0], minmax[1]); |
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71 |
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72 List<MainValue> mainValues = getMainValues(river, gauge); |
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73 |
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74 return buildDocument(river, gauge, mainValues, context); |
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75 } |
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76 catch (NullPointerException npe) { |
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77 logger.error("Could not process the request."); |
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78 logger.error(npe, npe); |
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79 |
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80 return XMLUtils.newDocument(); |
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81 } |
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82 } |
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83 |
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84 |
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85 /** |
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86 * This method extracts the river from the incoming request. If no river |
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87 * string was found or no river is found in the database based on this |
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88 * string a NullPointerException is thrown. |
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89 * |
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90 * @param data The incoming request data. |
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91 * |
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92 * @return the River object. |
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93 */ |
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94 protected River getRequestedRiver(Document data) |
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95 throws NullPointerException |
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96 { |
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97 logger.debug("MainValuesService.getRiver"); |
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98 |
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99 String riverStr = XMLUtils.xpathString( |
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100 data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE); |
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101 |
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102 if (riverStr == null || riverStr.trim().length() == 0) { |
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103 throw new NullPointerException("No river found in the request."); |
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104 } |
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105 |
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106 River river = RiverFactory.getRiver(riverStr); |
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107 |
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108 if (river == null) { |
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109 throw new NullPointerException("No such river found: " + riverStr); |
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110 } |
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111 |
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112 return river; |
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113 } |
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114 |
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115 |
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116 /** |
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117 * This method extracts the start and end point from incoming request |
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118 * document and returns both values in an array. If no start and end strings |
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119 * are found in the document, the min/max values of the <i>river</i> are |
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120 * returned. |
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121 * |
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122 * @param data The incoming request data. |
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123 * @param river The river of the request. |
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124 * |
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125 * @return the start and end point. |
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126 */ |
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127 protected double[] getRequestedStartEnd(Document data, River river) { |
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128 logger.debug("MainValuesService.getStartEnd"); |
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129 |
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130 String startStr = XMLUtils.xpathString( |
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131 data, XPATH_START, ArtifactNamespaceContext.INSTANCE); |
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132 |
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133 String endStr = XMLUtils.xpathString( |
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134 data, XPATH_END, ArtifactNamespaceContext.INSTANCE); |
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135 |
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136 try { |
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137 double start = Double.parseDouble(startStr); |
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138 double end = Double.parseDouble(endStr); |
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139 |
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140 logger.debug("Found start: " + start); |
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141 logger.debug("Found end: " + end); |
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142 |
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143 return new double[] { start, end }; |
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144 } |
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145 catch (NumberFormatException nfe) { |
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146 logger.warn(nfe, nfe); |
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147 |
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148 return river.determineMinMaxDistance(); |
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149 } |
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150 } |
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151 |
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152 |
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153 /** |
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154 * This method creates the result document that includes the main values of |
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155 * the specified <i>gauge</i>. |
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156 * |
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157 * @param river The river. |
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158 * @param gauge The gauge. |
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159 * |
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160 * @return a document that includes the main values of the specified river |
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161 * at the specified gauge. |
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162 */ |
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163 protected List<MainValue> getMainValues(River river, Gauge gauge) |
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164 throws NullPointerException |
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165 { |
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166 if (logger.isDebugEnabled()) { |
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167 logger.debug("MainValuesService.buildMainValues"); |
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168 logger.debug("River: " + river.getName()); |
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169 logger.debug("Gauge: " + gauge.getName()); |
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170 } |
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171 |
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172 Session session = SessionHolder.acquire(); |
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173 try { |
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174 List<MainValue> mainValues = MainValuesFactory.getMainValues(gauge); |
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175 |
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176 if (mainValues == null || mainValues.isEmpty()) { |
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177 throw new NullPointerException("No main values found."); |
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178 } |
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179 |
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180 logger.debug(mainValues.size() + " main values found."); |
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181 |
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182 return mainValues; |
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183 } |
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184 finally { |
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185 session.close(); |
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186 SessionHolder.release(); |
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187 } |
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188 } |
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189 |
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190 |
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191 protected Document buildDocument( |
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192 River river, |
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193 Gauge gauge, |
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194 List<MainValue> mainValues, |
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195 Object context) |
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196 { |
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197 logger.debug("MainValuesService.buildDocument"); |
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198 |
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199 Document doc = XMLUtils.newDocument(); |
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200 |
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201 ElementCreator cr = new ElementCreator( |
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202 doc, |
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203 ArtifactNamespaceContext.NAMESPACE_URI, |
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204 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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205 |
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206 Element rootEl = cr.create("service"); |
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207 cr.addAttr(rootEl, "name", "mainvalues"); |
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208 |
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209 doc.appendChild(rootEl); |
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210 |
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211 appendMetaInformation(doc, rootEl, river, gauge, context); |
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212 appendMainValues(doc, rootEl, mainValues, context); |
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213 |
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214 return doc; |
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215 } |
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216 |
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217 |
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218 /** |
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219 * This method appends some meta information to the result document. |
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220 * Currently, the river's and gauge's names and the gauge's range are |
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221 * appended. |
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222 * |
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223 * @param root The root element of the result document. |
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224 * @param river The river. |
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225 * @param gauge The gauge. |
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226 * @param context The context object. |
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227 */ |
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228 protected void appendMetaInformation( |
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229 Document doc, |
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230 Element root, |
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231 River river, |
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232 Gauge gauge, |
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233 Object context) |
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234 { |
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235 logger.debug("MainValuesService.appendMetaInformation"); |
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236 |
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237 ElementCreator cr = new ElementCreator( |
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238 doc, |
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239 ArtifactNamespaceContext.NAMESPACE_URI, |
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240 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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241 |
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242 Range range = gauge.getRange(); |
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243 |
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244 Element riverEl = cr.create("river"); |
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245 cr.addAttr(riverEl, "name", river.getName()); |
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246 |
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247 Element gaugeEl = cr.create("gauge"); |
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248 cr.addAttr(gaugeEl, "name", gauge.getName()); |
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249 cr.addAttr(gaugeEl, "from", range.getA().toString()); |
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250 cr.addAttr(gaugeEl, "to", range.getB().toString()); |
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251 |
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252 root.appendChild(riverEl); |
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253 root.appendChild(gaugeEl); |
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254 } |
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255 |
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256 |
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257 protected void appendMainValues( |
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258 Document doc, |
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259 Element root, |
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260 List<MainValue> mainValues, |
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261 Object context) |
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262 { |
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263 logger.debug("MainValuesService.appendMainValues"); |
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264 |
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265 ElementCreator cr = new ElementCreator( |
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266 doc, |
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267 ArtifactNamespaceContext.NAMESPACE_URI, |
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268 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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269 |
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270 Element list = cr.create("mainvalues"); |
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271 |
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272 for (MainValue mainValue: mainValues) { |
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273 Element newEl = buildMainValueElement(doc, mainValue, context); |
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274 |
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275 if (newEl != null) { |
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276 list.appendChild(newEl); |
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277 } |
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278 } |
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279 |
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280 root.appendChild(list); |
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281 } |
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282 |
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283 |
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284 /** |
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285 * This method builds a concrete mainvalue element. This element consists of |
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286 * three attributes: the value, its name and its type. |
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287 * |
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288 * @param doc The owner document. |
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289 * @param mainValue The mainvalue. |
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290 * @param context The context object. |
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291 * |
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292 * @return a mainvalue element. |
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293 */ |
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294 protected Element buildMainValueElement( |
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295 Document doc, |
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296 MainValue mainValue, |
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297 Object context) |
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298 { |
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299 ElementCreator cr = new ElementCreator( |
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300 doc, |
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301 ArtifactNamespaceContext.NAMESPACE_URI, |
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302 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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changeset
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303 |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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changeset
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304 NamedMainValue namedMainValue = mainValue.getMainValue(); |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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305 MainValueType mainValueType = namedMainValue.getType(); |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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changeset
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306 |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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307 Element el = cr.create("mainvalue"); |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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changeset
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308 |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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309 cr.addAttr(el, "value", mainValue.getValue().toString()); |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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changeset
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310 cr.addAttr(el, "name", namedMainValue.getName()); |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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changeset
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311 cr.addAttr(el, "type", mainValueType.getName()); |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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312 |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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313 return el; |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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314 } |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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315 } |
5a2df8677b3e
Added a service that returns the MainValues of a Gauge based on a river name and a stationing.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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316 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |