Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/GaugeInfoService.java @ 4173:7d4480c0e68e

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Allow users to select the current relevant discharge table in historical discharge table calculattion. In addition to this, the discharge tables in the helper panel displayed in the client is ordered in time.
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 18 Oct 2012 12:13:48 +0200
parents 5e7da178daa6
children
rev   line source
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fb7975828ffa #544 Added a service that allows querying gauge information.
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1 package de.intevation.flys.artifacts.services;
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2
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3 import java.util.ArrayList;
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4 import java.util.List;
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5
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6 import org.w3c.dom.Document;
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7 import org.w3c.dom.Element;
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8
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9 import org.apache.log4j.Logger;
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10
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11 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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12 import de.intevation.artifacts.common.utils.XMLUtils;
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13 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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14
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15 import de.intevation.artifacts.CallMeta;
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16 import de.intevation.artifacts.GlobalContext;
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17
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18 import de.intevation.flys.model.Gauge;
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19 import de.intevation.flys.model.Range;
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20 import de.intevation.flys.model.River;
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21
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22 import de.intevation.flys.artifacts.model.RiverFactory;
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23
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24
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25 /**
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26 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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27 */
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28 public class GaugeInfoService extends FLYSService {
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29
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30 interface Filter {
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31 boolean apply(Gauge gauge);
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32 }
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33
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34
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35 private static final class ReferenceNumberFilter implements Filter {
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36 private long refNr;
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37
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38 public ReferenceNumberFilter(long refNr) {
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39 this.refNr = refNr;
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40 }
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41
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42 @Override
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43 public boolean apply(Gauge gauge) {
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44 if (logger.isDebugEnabled()) {
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45 logger.debug("Test gauge '" + gauge.getName() + "'");
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46 }
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47
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48 return gauge != null && gauge.getOfficialNumber() == refNr;
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49 }
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50 } // end of ReferenceNumberFilter class
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51
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52
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53 /** The logger that is used by this service.*/
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54 private static Logger logger = Logger.getLogger(GaugeInfoService.class);
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55
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56
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57 public static final String XPATH_RIVERNAME = "/art:river/@name";
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58
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59 public static final String XPATH_REFERENCE_NR
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60 = "/art:river/art:filter/art:gauge/text()";
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61
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62
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63 public GaugeInfoService() {
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64 }
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65
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66
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67 @Override
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68 public Document doProcess(
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69 Document data,
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70 GlobalContext context,
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71 CallMeta callMeta
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72 ) {
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73 logger.debug("GaugeInfoService.process");
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74
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75 if (logger.isDebugEnabled()) {
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76 logger.debug(XMLUtils.toString(data));
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77 }
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78
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79 River river = getRiverFromRequest(data);
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80
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81 List<Filter> filters = getFilters(data);
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82 List<Gauge> allGauges = river.getGauges();
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83 List<Gauge> filtered = new ArrayList<Gauge>();
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84
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85 for (Gauge g: allGauges) {
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86 for (Filter f: filters) {
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87 if (f.apply(g)) {
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88 filtered.add(g);
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89 break;
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90 }
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91 }
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92 }
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93
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94 return buildInfoDocument(filtered);
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95 }
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96
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97
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98 protected River getRiverFromRequest(Document data) {
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99 String rivername = XMLUtils.xpathString(
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100 data,
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101 XPATH_RIVERNAME,
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102 ArtifactNamespaceContext.INSTANCE);
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103
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104 logger.debug("Return Gauge info for River '" + rivername + "'");
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105
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106 return rivername != null ? RiverFactory.getRiver(rivername) : null;
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107 }
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108
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109
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110 protected List<Filter> getFilters(Document data) {
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111 List<Filter> filters = new ArrayList<Filter>();
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112
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113 String refNr = XMLUtils.xpathString(
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114 data,
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115 XPATH_REFERENCE_NR,
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116 ArtifactNamespaceContext.INSTANCE);
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117
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118 if (refNr != null && refNr.length() > 0) {
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119 try {
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120 filters.add(
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121 new ReferenceNumberFilter(Long.parseLong(refNr)));
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122 }
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123 catch (NumberFormatException nfe) {
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124 logger.warn(nfe, nfe);
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125 }
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126 }
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127
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128 return filters;
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129 }
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130
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131
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132 protected Document buildInfoDocument(List<Gauge> gauges) {
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133 Document doc = XMLUtils.newDocument();
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134
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135 ElementCreator cr = new ElementCreator(
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136 doc,
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137 ArtifactNamespaceContext.NAMESPACE_URI,
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138 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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139
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140 Element service = cr.create("service");
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141
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142 logger.debug("Append " + gauges.size() + " gauges to info doc.");
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143
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144 for (Gauge g: gauges) {
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145 Range r = g.getRange();
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146
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147 Element el = cr.create("gauge");
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148 cr.addAttr(el, "name", g.getName());
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149 cr.addAttr(el, "lower", String.valueOf(r.getA().doubleValue()));
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150 cr.addAttr(el, "upper", String.valueOf(r.getB().doubleValue()));
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151
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152 service.appendChild(el);
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153 }
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154
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155 doc.appendChild(service);
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156
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157 return doc;
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158 }
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159 }
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160 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org