Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DischargeInfoService.java @ 4128:11c589d68f13

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Fix for NPE in FLYSWorkspace.bringUp() #933
author Christian Lins <christian.lins@intevation.de>
date Sun, 14 Oct 2012 10:15:50 +0200
parents 0cc2c3d89a9d
children 7d4480c0e68e
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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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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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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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 logger.debug(XMLUtils.toString(data));
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47
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48 String gaugeNumber = XMLUtils.xpathString(
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49 data, GAUGE_XPATH, ArtifactNamespaceContext.INSTANCE);
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50
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51 if(gaugeNumber == null ||
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52 (gaugeNumber = gaugeNumber.trim()).length() == 0) {
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53 logger.warn("No gauge specified. Cannot return discharge info.");
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54 return XMLUtils.newDocument();
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55 }
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56
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57 logger.debug("Getting discharge for gauge: " + gaugeNumber);
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58
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59 long gn;
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60 try {
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61 gn = Long.parseLong(gaugeNumber);
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62 }
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63 catch (NumberFormatException nfe) {
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64 logger.warn("Invalid gauge number. Cannot return discharg info.");
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65 return XMLUtils.newDocument();
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66 }
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67
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68 Gauge gauge = Gauge.getGaugeByOfficialNumber(gn);
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69
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70 logger.debug("Found gauge: " + gauge.getName());
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71
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72 return buildDocument(gauge);
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73 }
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74
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75
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76 protected Document buildDocument(Gauge gauge) {
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77 Document result = XMLUtils.newDocument();
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78
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79 List<DischargeTable> tables =gauge.getDischargeTables();
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80
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81 Element all = result.createElement("discharges");
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82 for (DischargeTable dt: tables) {
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83 if (dt.getKind() == Gauge.MASTER_DISCHARGE_TABLE) {
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84 continue;
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85 }
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86
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87 Element discharge = result.createElement("discharge");
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88 discharge.setAttribute("description", dt.getDescription());
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89
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90 // Get time interval.
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91 TimeInterval ti = dt.getTimeInterval();
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92
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93 if (ti == null) {
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94 logger.warn("DischargeTable has no TimeInterval set!");
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95 continue;
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96 }
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97
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98 Date startTime = ti.getStartTime();
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99 Date stopTime = ti.getStopTime();
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100
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101 if (startTime != null) {
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102 discharge.setAttribute("start", String.valueOf(startTime.getTime()));
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103 }
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104 else {
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105 discharge.setAttribute("start", "-1");
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106 }
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107
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108 if (stopTime != null) {
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109 discharge.setAttribute("end", String.valueOf(stopTime.getTime()));
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110 }
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111 else {
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112 discharge.setAttribute("end", "-1");
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113 }
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114
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115 all.appendChild(discharge);
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116 }
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117 result.appendChild(all);
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118 return result;
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119 }
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120 }
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121 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org