Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/services/MainValuesService.java @ 7639:11bc2d6a2059

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Removed obsolete imports.
author Sascha L. Teichmann <teichmann@intevation.de>
date Tue, 03 Dec 2013 16:11:54 +0100
parents 368d419ae4d1
children e4606eae8ea5
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.services;
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10
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11 import java.util.List;
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12
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13 import org.apache.log4j.Logger;
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14
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15 import org.w3c.dom.Document;
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16 import org.w3c.dom.Element;
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17
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18 import org.dive4elements.artifacts.CallMeta;
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19 import org.dive4elements.artifacts.GlobalContext;
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20
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21 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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22 import org.dive4elements.artifacts.common.utils.XMLUtils;
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23 import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
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24
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25 import org.dive4elements.river.model.Gauge;
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26 import org.dive4elements.river.model.MainValue;
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27 import org.dive4elements.river.model.MainValueType;
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28 import org.dive4elements.river.model.NamedMainValue;
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29 import org.dive4elements.river.model.OfficialLine;
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30 import org.dive4elements.river.model.Range;
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31 import org.dive4elements.river.model.River;
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32
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33 import org.dive4elements.river.artifacts.model.RiverFactory;
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34
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35
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36 /**
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37 * This service returns the main values of a river's gauge based on the start
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38 * and end point of the river.
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39 *
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40 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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41 */
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42 public class MainValuesService extends D4EService {
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43
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44 /** The logger that is used by this service.*/
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45 private static Logger logger = Logger.getLogger(MainValuesService.class);
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46
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47 /** The XPath that points to the river definition of the incoming request.*/
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48 public static final String XPATH_RIVER = "/art:mainvalues/art:river/text()";
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49
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50 /** The XPath that points to the start definition of the incoming request.*/
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51 public static final String XPATH_START = "/art:mainvalues/art:start/text()";
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52
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53 /** The XPath that points to the end definition of the incoming request.*/
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54 public static final String XPATH_END = "/art:mainvalues/art:end/text()";
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55
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56 protected CallMeta callMeta;
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57
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58
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59 /**
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60 * The default constructor.
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61 */
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62 public MainValuesService() {
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63 }
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64
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65 private static final Document error(String msg) {
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66 logger.debug(msg);
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67 return XMLUtils.newDocument();
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68 }
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69
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70
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71 @Override
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72 public Document doProcess(
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73 Document data,
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74 GlobalContext context,
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75 CallMeta callMeta
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76 ) {
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77 logger.debug("MainValuesService.process");
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78
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79 this.callMeta = callMeta;
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80
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81 River river = getRequestedRiver(data);
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82 if (river == null) {
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83 return error("no river found.");
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84 }
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86 double[] minmax = getRequestedStartEnd(data, river);
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87 Gauge gauge = river.determineGauge(minmax[0], minmax[1]);
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88
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89 if (gauge == null) {
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90 return error("no gauge found.");
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91 }
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93 List<MainValue> mainValues = getMainValues(river, gauge);
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94
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95 return buildDocument(river, gauge, mainValues, context);
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96 }
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98
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99 /**
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100 * This method extracts the river from the incoming request. If no river
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101 * string was found or no river is found in the database based on this
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102 * string a NullPointerException is thrown.
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103 *
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104 * @param data The incoming request data.
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105 *
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106 * @return the River object.
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107 */
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108 protected River getRequestedRiver(Document data)
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109 throws NullPointerException
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110 {
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111 logger.debug("MainValuesService.getRequestedRiver");
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112
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113 String riverStr = XMLUtils.xpathString(
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114 data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
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115
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116 return riverStr != null && (riverStr = riverStr.trim()).length() > 0
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117 ? RiverFactory.getRiver(riverStr)
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118 : null;
331
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119 }
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120
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121
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122 /**
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123 * This method extracts the start and end point from incoming request
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124 * document and returns both values in an array. If no start and end strings
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125 * are found in the document, the min/max values of the <i>river</i> are
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126 * returned.
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127 *
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128 * @param data The incoming request data.
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129 * @param river The river of the request.
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130 *
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131 * @return the start and end point.
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132 */
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133 protected double[] getRequestedStartEnd(Document data, River river) {
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134 logger.debug("MainValuesService.getStartEnd");
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135
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136 String startStr = XMLUtils.xpathString(
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137 data, XPATH_START, ArtifactNamespaceContext.INSTANCE);
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138
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139 String endStr = XMLUtils.xpathString(
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140 data, XPATH_END, ArtifactNamespaceContext.INSTANCE);
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141
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142 if (startStr == null || endStr == null) {
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143 return river.determineMinMaxDistance();
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144 }
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145
331
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146 try {
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147 double start = Double.parseDouble(startStr);
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148 double end = Double.parseDouble(endStr);
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149
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150 if (logger.isDebugEnabled()) {
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151 logger.debug("Found start: " + start);
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152 logger.debug("Found end: " + end);
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153 }
331
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154
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155 return new double[] { start, end };
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156 }
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157 catch (NumberFormatException nfe) {
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158 logger.warn(nfe, nfe);
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159 return river.determineMinMaxDistance();
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160 }
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161 }
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162
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163
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164 /**
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165 * This method creates the result document that includes the main values of
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166 * the specified <i>gauge</i>.
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167 *
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168 * @param river The river.
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169 * @param gauge The gauge.
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170 *
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171 * @return a document that includes the main values of the specified river
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172 * at the specified gauge.
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173 */
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174 protected List<MainValue> getMainValues(River river, Gauge gauge) {
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175
331
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176 if (logger.isDebugEnabled()) {
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177 logger.debug("MainValuesService.buildMainValues");
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178 logger.debug("River: " + river.getName());
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179 logger.debug("Gauge: " + gauge.getName());
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180 }
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181
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182 List<MainValue> mainValues = gauge.getMainValues();
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183
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184 if (logger.isDebugEnabled()) {
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185 logger.debug(mainValues.size() + " main values found.");
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186 }
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187
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188 return mainValues;
331
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189 }
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190
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191
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192 protected Document buildDocument(
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193 River river,
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194 Gauge gauge,
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195 List<MainValue> mainValues,
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196 Object context)
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197 {
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198 logger.debug("MainValuesService.buildDocument");
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199
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200 Document doc = XMLUtils.newDocument();
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201
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202 ElementCreator cr = new ElementCreator(
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203 doc,
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204 ArtifactNamespaceContext.NAMESPACE_URI,
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205 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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206
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207 Element rootEl = cr.create("service");
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208 cr.addAttr(rootEl, "name", "mainvalues");
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209
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210 doc.appendChild(rootEl);
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211
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212 appendMetaInformation(doc, rootEl, river, gauge, context);
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213 appendMainValues(doc, rootEl, mainValues, river.getId(), context);
331
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214
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215 return doc;
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216 }
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217
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218
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219 /**
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220 * This method appends some meta information to the result document.
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221 * Currently, the river's and gauge's names and the gauge's range are
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222 * appended.
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223 *
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224 * @param root The root element of the result document.
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225 * @param river The river.
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226 * @param gauge The gauge.
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227 * @param context The context object.
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228 */
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229 protected void appendMetaInformation(
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230 Document doc,
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231 Element root,
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232 River river,
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233 Gauge gauge,
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234 Object context)
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235 {
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236 logger.debug("MainValuesService.appendMetaInformation");
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237
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238 ElementCreator cr = new ElementCreator(
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239 doc,
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240 ArtifactNamespaceContext.NAMESPACE_URI,
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241 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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242
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243 Range range = gauge.getRange();
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244
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245 Element riverEl = cr.create("river");
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246 cr.addAttr(riverEl, "name", river.getName());
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247
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248 Element gaugeEl = cr.create("gauge");
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249 cr.addAttr(gaugeEl, "name", gauge.getName());
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250 cr.addAttr(gaugeEl, "from", range.getA().toString());
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251 cr.addAttr(gaugeEl, "to", range.getB().toString());
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252
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253 root.appendChild(riverEl);
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254 root.appendChild(gaugeEl);
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255 }
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256
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257
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258 /** Checks i a main value has an official associated, */
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259 protected static boolean hasOfficialLine(NamedMainValue nmv, Integer riverId) {
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260 for (OfficialLine ol: nmv.getOfficialLines()) {
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261 if (ol.getWstColumn().getWst().getRiver().getId().equals(riverId)) {
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262 return true;
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263 }
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264 }
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265 return false;
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266 }
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267
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268
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269 /** Append xml representation of main values to document. */
331
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270 protected void appendMainValues(
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271 Document doc,
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272 Element root,
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273 List<MainValue> mainValues,
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274 Integer riverId,
331
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275 Object context)
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276 {
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277 logger.debug("MainValuesService.appendMainValues");
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278
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279 ElementCreator cr = new ElementCreator(
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280 doc,
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281 ArtifactNamespaceContext.NAMESPACE_URI,
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282 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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283
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284 Element list = cr.create("mainvalues");
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285
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286 for (MainValue mainValue: mainValues) {
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287 Element newEl = buildMainValueElement(doc, mainValue, riverId, context);
331
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288
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289 if (newEl != null) {
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290 list.appendChild(newEl);
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291 }
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292 }
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293
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294 root.appendChild(list);
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295 }
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296
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297
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298 /**
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299 * This method builds a concrete mainvalue element. This element consists of
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300 * three attributes: the value, its name and its type.
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301 *
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302 * @param doc The owner document.
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303 * @param mainValue The mainvalue.
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304 * @param context The context object.
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305 *
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306 * @return a mainvalue element.
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307 */
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308 protected Element buildMainValueElement(
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309 Document doc,
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310 MainValue mainValue,
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311 Integer riverId,
331
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312 Object context)
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313 {
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314 ElementCreator cr = new ElementCreator(
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315 doc,
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316 ArtifactNamespaceContext.NAMESPACE_URI,
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diff changeset
317 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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318
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319 NamedMainValue namedMainValue = mainValue.getMainValue();
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320 MainValueType mainValueType = namedMainValue.getType();
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321
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322 Element el = cr.create("mainvalue");
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323
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324 cr.addAttr(el, "value", mainValue.getValue().toString());
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325 cr.addAttr(el, "name", namedMainValue.getName());
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diff changeset
326 cr.addAttr(el, "type", mainValueType.getName());
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327 if (mainValue.getTimeInterval() != null) {
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328 if (mainValue.getTimeInterval().getStartTime() != null) {
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diff changeset
329 cr.addAttr(el, "starttime",
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diff changeset
330 Long.toString(mainValue.getTimeInterval().getStartTime().getTime()));
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331 }
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diff changeset
332 if (mainValue.getTimeInterval().getStopTime() != null) {
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diff changeset
333 cr.addAttr(el, "stoptime",
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diff changeset
334 Long.toString(mainValue.getTimeInterval().getStopTime().getTime()));
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diff changeset
335 }
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diff changeset
336 }
331
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diff changeset
337
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diff changeset
338 if (hasOfficialLine(namedMainValue, riverId)) {
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339 cr.addAttr(el, "official", "true");
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340 }
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341
331
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parents:
diff changeset
342 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:
diff changeset
343 }
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:
diff changeset
344 }
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:
diff changeset
345 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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