Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DischargeInfoService.java @ 2598:e96bf6c47c12

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Improved selecting discharge tables for historical discharge calculation. flys-artifacts/trunk@4169 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 20 Mar 2012 11:34:44 +0000
parents 2966787b5188
children 4bd3d8bbb60c
rev   line source
2276
2966787b5188 Added service for discharge infos at a specific gauge.
Raimund Renkert <raimund.renkert@intevation.de>
parents:
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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 import java.util.Date;
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5 import java.util.Calendar;
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Raimund Renkert <raimund.renkert@intevation.de>
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6 import java.util.GregorianCalendar;
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7
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8 import org.apache.log4j.Logger;
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9
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10 import org.w3c.dom.Document;
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11 import org.w3c.dom.Element;
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12
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Raimund Renkert <raimund.renkert@intevation.de>
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13 import de.intevation.artifacts.CallMeta;
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14 import de.intevation.artifacts.GlobalContext;
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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
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19 import de.intevation.flys.model.Gauge;
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20 import de.intevation.flys.model.DischargeTable;
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21 import de.intevation.flys.model.TimeInterval;
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22
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Raimund Renkert <raimund.renkert@intevation.de>
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23 /**
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24 * This service provides information about discharges at a defined gauge.
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25 *
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26 * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a>
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27 */
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28 public class DischargeInfoService extends FLYSService {
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29
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30 /** The logger used in this service. */
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31 private static Logger logger = Logger.getLogger(DischargeInfoService.class);
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32
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33 public static final String GAUGE_XPATH = "/art:gauge/text()";
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34
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35 public DischargeInfoService() {
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36 }
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37
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38
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39 @Override
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40 public Document doProcess(
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41 Document data,
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42 GlobalContext globalContext,
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43 CallMeta callMeta
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44 ) {
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45 logger.debug("DischargeInfoService.process");
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46
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47 String gaugeNumber = XMLUtils.xpathString(
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48 data, GAUGE_XPATH, ArtifactNamespaceContext.INSTANCE);
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49
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50 if(gaugeNumber == null ||
2966787b5188 Added service for discharge infos at a specific gauge.
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51 (gaugeNumber = gaugeNumber.trim()).length() == 0) {
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52 logger.warn("No gauge specified. Cannot return discharge info.");
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53 return XMLUtils.newDocument();
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54 }
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55
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56 logger.debug("Getting discharge for gauge: " + gaugeNumber);
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57
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58 long gn;
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59 try {
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60 gn = Long.parseLong(gaugeNumber);
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61 }
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62 catch (NumberFormatException nfe) {
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63 logger.warn("Invalid gauge number. Cannot return discharg info.");
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64 return XMLUtils.newDocument();
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65 }
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66
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67 Gauge gauge = Gauge.getGaugeByOfficialNumber(gn);
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68
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69 logger.debug("Found gauge: " + gauge.getName());
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70
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71 return buildDocument(gauge);
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72 }
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73
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74
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75 protected Document buildDocument(Gauge gauge) {
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76 Document result = XMLUtils.newDocument();
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77
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78 List<DischargeTable> tables =gauge.getDischargeTables();
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79
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80 Element all = result.createElement("discharges");
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81 for (DischargeTable dt: tables) {
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82 if (dt.getKind() == Gauge.MASTER_DISCHARGE_TABLE) {
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83 continue;
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84 }
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85
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86 Element discharge = result.createElement("discharge");
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87 discharge.setAttribute("description", dt.getDescription());
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88
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89 // Get time interval.
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90 TimeInterval ti = dt.getTimeInterval();
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91
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92 if (ti == null) {
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93 logger.warn("DischargeTable has no TimeInterval set!");
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94 continue;
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95 }
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96
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97 Date startTime = ti.getStartTime();
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98 Date stopTime = ti.getStopTime();
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99
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100 // Get the year for start end end date.
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101 int startYear;
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102 int stopYear;
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103 Calendar c = new GregorianCalendar();
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104 if (startTime != null) {
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105 c.setTime(startTime);
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106 startYear = c.get(Calendar.YEAR);
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107 }
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108 else {
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109 startYear = -1;
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110 }
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111 if (stopTime != null) {
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112 c.setTime(stopTime);
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113 stopYear = c.get(Calendar.YEAR);
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114 }
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115 else {
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116 stopYear = -1;
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117 }
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118
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119 discharge.setAttribute("start", String.valueOf(startYear));
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120 discharge.setAttribute("end", String.valueOf(stopYear));
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121
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122 all.appendChild(discharge);
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123 }
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124 result.appendChild(all);
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125 return result;
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126 }
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127 }
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