Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/services/AbstractMainValuesService.java @ 9288:82c67b859aa7

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bundu.bezugswst worklflow incl. service impl for mainValues to be calculated
author gernotbelger
date Tue, 24 Jul 2018 10:39:03 +0200
parents
children bc9a45d2b1fa
rev   line source
9288
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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 static org.dive4elements.river.backend.utils.EpsilonComparator.CMP;
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12
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13 import java.util.List;
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14
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15 import org.apache.log4j.Logger;
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16 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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17 import org.dive4elements.artifacts.common.utils.XMLUtils;
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18 import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
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19 import org.dive4elements.river.artifacts.model.RiverFactory;
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20 import org.dive4elements.river.model.Gauge;
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21 import org.dive4elements.river.model.MainValue;
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22 import org.dive4elements.river.model.MainValueType;
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23 import org.dive4elements.river.model.NamedMainValue;
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24 import org.dive4elements.river.model.OfficialLine;
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25 import org.dive4elements.river.model.Range;
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26 import org.dive4elements.river.model.River;
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27 import org.w3c.dom.Document;
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28 import org.w3c.dom.Element;
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29
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30 /**
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31 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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32 */
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33 abstract class AbstractMainValuesService extends D4EService {
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34
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35 private static final long serialVersionUID = 1L;
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36
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37 public static final class MainValuesServiceException extends Exception {
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38
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39 private static final long serialVersionUID = 1L;
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40
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41 public MainValuesServiceException(final String message) {
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42 super(message);
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43 }
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44 }
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45
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46 /** The log that is used by this service. */
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47 private static Logger log = Logger.getLogger(AbstractMainValuesService.class);
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48
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49 /** XPath that points to the river definition of the incoming request. */
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50 private static final String XPATH_RIVER = "/art:mainvalues/art:river/text()";
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51
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52 /** XPath that points to the start definition of the incoming request. */
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53 private static final String XPATH_START = "/art:mainvalues/art:start/text()";
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54
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55 /** The XPath that points to the end definition of the incoming request. */
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56 private static final String XPATH_END = "/art:mainvalues/art:end/text()";
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57
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58 protected static final Document error(final String msg) {
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59 log.debug(msg);
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60 return XMLUtils.newDocument();
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61 }
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62
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63 /**
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64 * This method extracts the river from the incoming request. If no river
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65 * string was found or no river is found in the database based on this
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66 * string a NullPointerException is thrown.
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67 *
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68 * @param data
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69 * The incoming request data.
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70 *
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71 * @return the River object.
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72 */
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73 protected final River getRequestedRiver(final Document data) throws MainValuesServiceException {
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74 log.debug("MainValuesService.getRequestedRiver");
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75
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76 String riverStr = XMLUtils.xpathString(data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
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77
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78 if (riverStr != null && (riverStr = riverStr.trim()).length() > 0)
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79 return RiverFactory.getRiver(riverStr);
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80
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81 throw new MainValuesServiceException("no river found.");
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82 }
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83
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84 protected final Gauge getRequestedGauge(final Document data, final River river) throws MainValuesServiceException {
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85
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86 final double[] minmax = getRequestedStartEnd(data, river);
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87 final Gauge gauge = river.determineRefGauge(minmax, CMP.compare(minmax[0], minmax[1]) != 0);
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88 if (gauge == null)
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89 throw new MainValuesServiceException("no gauge found.");
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90
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91 return gauge;
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92 }
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93
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94 /**
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95 * This method extracts the start and end point from incoming request
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96 * document and returns both values in an array.
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97 * If no start and end strings
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98 * are found in the document, the min/max values of the <i>river</i> are
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99 * returned.
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100 *
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101 * @param data
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102 * The incoming request data.
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103 * @param river
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104 * The river of the request.
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105 *
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106 * @return the start and end point.
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107 */
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108 private double[] getRequestedStartEnd(final Document data, final River river) {
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109 log.debug("MainValuesService.getStartEnd");
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110
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111 final String startStr = XMLUtils.xpathString(data, XPATH_START, ArtifactNamespaceContext.INSTANCE);
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112
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113 final String endStr = XMLUtils.xpathString(data, XPATH_END, ArtifactNamespaceContext.INSTANCE);
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114
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115 if (startStr == null || endStr == null) {
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116 return river.determineMinMaxDistance();
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117 }
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118
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119 try {
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120 final double start = Double.parseDouble(startStr);
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121 final double end = Double.parseDouble(endStr);
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122
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123 if (log.isDebugEnabled()) {
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124 log.debug("Found start: " + start);
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125 log.debug("Found end: " + end);
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126 }
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127
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128 return new double[] { start, end };
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129 }
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130 catch (final NumberFormatException nfe) {
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131 log.warn(nfe, nfe);
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132 return river.determineMinMaxDistance();
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133 }
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134 }
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135
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136 protected final Document buildDocument(final River river, final Gauge gauge, final List<MainValue> mainValues, final Object context) {
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137 log.debug("MainValuesService.buildDocument");
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138
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139 final Document doc = XMLUtils.newDocument();
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140
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141 final ElementCreator cr = new ElementCreator(doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX);
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142
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143 final Element rootEl = cr.create("service");
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144 cr.addAttr(rootEl, "name", "mainvalues");
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145
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146 doc.appendChild(rootEl);
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147
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148 appendMetaInformation(doc, rootEl, river, gauge, context);
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149 appendMainValues(doc, rootEl, mainValues, river.getId(), context);
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150
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151 return doc;
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152 }
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153
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154 /**
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155 * This method appends some meta information to the result document.
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156 * Currently, the river's and gauge's names and the gauge's range are
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157 * appended.
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158 *
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159 * @param root
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160 * The root element of the result document.
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161 * @param river
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162 * The river.
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163 * @param gauge
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164 * The gauge.
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165 * @param context
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166 * The context object.
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167 */
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168 private void appendMetaInformation(final Document doc, final Element root, final River river, final Gauge gauge, final Object context) {
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169 log.debug("MainValuesService.appendMetaInformation");
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170
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171 final ElementCreator cr = new ElementCreator(doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX);
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172
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173 final Range range = gauge.getRange();
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174
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175 final Element riverEl = cr.create("river");
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176 cr.addAttr(riverEl, "name", river.getName());
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177
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178 final Element gaugeEl = cr.create("gauge");
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179 cr.addAttr(gaugeEl, "name", gauge.getName());
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180 cr.addAttr(gaugeEl, "from", range.getA().toString());
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181 cr.addAttr(gaugeEl, "to", range.getB().toString());
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182
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183 root.appendChild(riverEl);
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184 root.appendChild(gaugeEl);
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185 }
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186
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187 /** Checks i a main value has an official associated, */
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188 private static boolean hasOfficialLine(final NamedMainValue nmv, final Integer riverId) {
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189 for (final OfficialLine ol : nmv.getOfficialLines()) {
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190 if (ol.getWstColumn().getWst().getRiver().getId().equals(riverId)) {
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191 return true;
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192 }
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193 }
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194 return false;
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195 }
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196
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197 /** Append xml representation of main values to document. */
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198 private void appendMainValues(final Document doc, final Element root, final List<MainValue> mainValues, final Integer riverId, final Object context) {
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199 log.debug("MainValuesService.appendMainValues");
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200
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201 final ElementCreator cr = new ElementCreator(doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX);
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202
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203 final Element list = cr.create("mainvalues");
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204
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205 for (final MainValue mainValue : mainValues) {
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206 final Element newEl = buildMainValueElement(doc, mainValue, riverId, context);
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207
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208 if (newEl != null) {
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209 list.appendChild(newEl);
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210 }
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211 }
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212
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213 root.appendChild(list);
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214 }
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215
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216 /**
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217 * This method builds a concrete mainvalue element. This element consists of
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218 * three attributes: the value, its name and its type.
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219 *
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220 * @param doc
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221 * The owner document.
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222 * @param mainValue
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223 * The mainvalue.
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224 * @param context
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225 * The context object.
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226 *
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227 * @return a mainvalue element.
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228 */
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229 private Element buildMainValueElement(final Document doc, final MainValue mainValue, final Integer riverId, final Object context) {
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230 final ElementCreator cr = new ElementCreator(doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX);
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231
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232 final NamedMainValue namedMainValue = mainValue.getMainValue();
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233 final MainValueType mainValueType = namedMainValue.getType();
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234
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235 final Element el = cr.create("mainvalue");
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236
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237 cr.addAttr(el, "value", mainValue.getValue().toString());
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238 cr.addAttr(el, "name", namedMainValue.getName());
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239 cr.addAttr(el, "type", mainValueType.getName());
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240 if (mainValue.getTimeInterval() != null) {
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241 if (mainValue.getTimeInterval().getStartTime() != null) {
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242 cr.addAttr(el, "starttime", Long.toString(mainValue.getTimeInterval().getStartTime().getTime()));
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243 }
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244 if (mainValue.getTimeInterval().getStopTime() != null) {
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245 cr.addAttr(el, "stoptime", Long.toString(mainValue.getTimeInterval().getStopTime().getTime()));
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246 }
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247 }
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248
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249 if (hasOfficialLine(namedMainValue, riverId)) {
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250 cr.addAttr(el, "official", "true");
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251 }
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252
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253 return el;
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254 }
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255 }
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