Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/FixingsKMChartService.java @ 2615:b0597a63fe70

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More code for the fixings km chart service. flys-artifacts/trunk@4199 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 04 Apr 2012 18:30:44 +0000
parents 036e234c2385
children cc0fa1798a3c
rev   line source
2614
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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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
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5 import de.intevation.artifactdatabase.DefaultService;
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6
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7 import de.intevation.artifacts.CallMeta;
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8 import de.intevation.artifacts.GlobalContext;
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9 import de.intevation.artifacts.Service;
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10
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11 import de.intevation.flys.artifacts.model.FixingsFilterBuilder;
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12 import de.intevation.flys.artifacts.model.FixingsOverview;
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13 import de.intevation.flys.artifacts.model.FixingsColumn;
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14 import de.intevation.flys.artifacts.model.FixingsColumnFactory;
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15 import de.intevation.flys.artifacts.model.FixingsOverviewFactory;
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16
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17 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing;
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18
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19 import de.intevation.flys.backend.SessionHolder;
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20
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21 import org.apache.log4j.Logger;
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22
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23 import org.w3c.dom.Document;
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24 import org.w3c.dom.Element;
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25 import org.w3c.dom.NodeList;
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26
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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27 public class FixingsKMChartService
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28 extends DefaultService
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29 {
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30 private static final Logger log =
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31 Logger.getLogger(FixingsKMChartService.class);
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32
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33 public static final byte [] EMPTY = {
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34 (byte)0x89, (byte)0x50, (byte)0x4e, (byte)0x47,
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35 (byte)0x0d, (byte)0x0a, (byte)0x1a, (byte)0x0a,
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36 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x0d,
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37 (byte)0x49, (byte)0x48, (byte)0x44, (byte)0x52,
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38 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01,
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39 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01,
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40 (byte)0x08, (byte)0x00, (byte)0x00, (byte)0x00,
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41 (byte)0x00, (byte)0x3a, (byte)0x7e, (byte)0x9b,
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42 (byte)0x55, (byte)0x00, (byte)0x00, (byte)0x00,
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43 (byte)0x01, (byte)0x73, (byte)0x52, (byte)0x47,
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44 (byte)0x42, (byte)0x00, (byte)0xae, (byte)0xce,
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45 (byte)0x1c, (byte)0xe9, (byte)0x00, (byte)0x00,
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46 (byte)0x00, (byte)0x09, (byte)0x70, (byte)0x48,
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47 (byte)0x59, (byte)0x73, (byte)0x00, (byte)0x00,
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48 (byte)0x0b, (byte)0x13, (byte)0x00, (byte)0x00,
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49 (byte)0x0b, (byte)0x13, (byte)0x01, (byte)0x00,
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50 (byte)0x9a, (byte)0x9c, (byte)0x18, (byte)0x00,
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51 (byte)0x00, (byte)0x00, (byte)0x07, (byte)0x74,
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52 (byte)0x49, (byte)0x4d, (byte)0x45, (byte)0x07,
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53 (byte)0xdc, (byte)0x04, (byte)0x04, (byte)0x10,
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54 (byte)0x30, (byte)0x15, (byte)0x7d, (byte)0x77,
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55 (byte)0x36, (byte)0x0b, (byte)0x00, (byte)0x00,
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56 (byte)0x00, (byte)0x08, (byte)0x74, (byte)0x45,
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57 (byte)0x58, (byte)0x74, (byte)0x43, (byte)0x6f,
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58 (byte)0x6d, (byte)0x6d, (byte)0x65, (byte)0x6e,
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59 (byte)0x74, (byte)0x00, (byte)0xf6, (byte)0xcc,
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60 (byte)0x96, (byte)0xbf, (byte)0x00, (byte)0x00,
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61 (byte)0x00, (byte)0x0a, (byte)0x49, (byte)0x44,
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62 (byte)0x41, (byte)0x54, (byte)0x08, (byte)0xd7,
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63 (byte)0x63, (byte)0xf8, (byte)0x0f, (byte)0x00,
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64 (byte)0x01, (byte)0x01, (byte)0x01, (byte)0x00,
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65 (byte)0x1b, (byte)0xb6, (byte)0xee, (byte)0x56,
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66 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00,
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67 (byte)0x49, (byte)0x45, (byte)0x4e, (byte)0x44,
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68 (byte)0xae, (byte)0x42, (byte)0x60, (byte)0x82
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69 };
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70
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71 private static final Output empty() {
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72 return new Output(EMPTY, "image/png");
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73 }
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74
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75 @Override
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76 public Service.Output process(
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77 Document data,
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78 GlobalContext globalContext,
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79 CallMeta callMeta
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80 ) {
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81 log.debug("FixingsKMChartService.process");
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82
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83 SessionHolder.acquire();
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84 try {
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85 return doProcess(data, globalContext, callMeta);
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86 }
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87 finally {
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88 SessionHolder.HOLDER.get().close();
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89 SessionHolder.release();
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90 }
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91 }
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92
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93 protected Service.Output doProcess(
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94 Document data,
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95 GlobalContext globalContext,
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96 CallMeta callMeta
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97 ) {
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98 NodeList rivers = data.getElementsByTagName("river");
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99 NodeList kms = data.getElementsByTagName("km");
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100
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101 if (rivers.getLength() == 0 || kms.getLength() == 0) {
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102 log.warn("Missing river and/or km.");
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103 return empty();
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104 }
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105
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106 String river = ((Element)rivers.item(0)).getAttribute("name");
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107 String kmS = ((Element)kms .item(0)).getAttribute("value");
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108
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109 if (river.length() == 0 || kmS.length() == 0) {
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110 log.warn("River and/or km empty string.");
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111 return empty();
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112 }
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113
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114 double km;
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115 try {
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116 km = Double.parseDouble(kmS);
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117 }
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118 catch (NumberFormatException nfe) {
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119 log.warn("Km '" + kmS + " is not a valid number.");
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120 return empty();
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121 }
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122
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123 FixingsOverview overview = FixingsOverviewFactory.getOverview(river);
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124
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125 if (overview == null) {
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126 log.warn("No overview found for river '" + river + "'");
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127 return empty();
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128 }
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129
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130 FixingsFilterBuilder ffb = new FixingsFilterBuilder(data);
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131
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132 List<Fixing.Column> columns = overview.filter(
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133 ffb.getRange(),
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134 ffb.getFilter());
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135
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136 for (Fixing.Column column: columns) {
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137 FixingsColumn columnData =
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138 FixingsColumnFactory.INSTANCE.getColumnData(column);
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139 if (columnData == null) {
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140 continue;
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141 }
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142 }
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143 // TODO: Implement chart generation!
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144
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145 return empty();
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146 }
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147 }
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148 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org