Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/GaugeInfoService.java @ 4468:2e8638567c49
FlowVelocityGenerator: Handle new discharge curves at new third axis.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Fri, 09 Nov 2012 12:09:23 +0100 |
parents | 5e7da178daa6 |
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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.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 : |