Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/server/FixingsOverviewServiceImpl.java @ 5583:523cd27b4c42
Element.getAttributeNS() does not return null values.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Fri, 05 Apr 2013 23:16:31 +0200 |
parents | 653dd9d7f5d5 |
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1 package de.intevation.flys.client.server; |
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2 |
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3 import com.google.gwt.user.server.rpc.RemoteServiceServlet; |
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4 |
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5 import de.intevation.artifacts.common.utils.XMLUtils; |
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6 import de.intevation.artifacts.common.utils.XSLTransformer; |
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7 |
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8 import de.intevation.artifacts.httpclient.exceptions.ConnectionException; |
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9 |
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10 import de.intevation.artifacts.httpclient.http.HttpClient; |
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11 import de.intevation.artifacts.httpclient.http.HttpClientImpl; |
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12 |
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13 import de.intevation.flys.client.client.services.FixingsOverviewService; |
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14 |
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15 import de.intevation.flys.client.shared.exceptions.ServerException; |
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16 |
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17 import de.intevation.flys.client.shared.model.FixingsOverviewInfo.FixEvent; |
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18 import de.intevation.flys.client.shared.model.FixingsOverviewInfo.Sector; |
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19 |
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20 import de.intevation.flys.client.shared.model.FixingsOverviewInfo; |
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21 |
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22 import java.io.IOException; |
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23 import java.io.InputStream; |
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24 |
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25 import java.util.ArrayList; |
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26 import java.util.List; |
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27 |
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28 import javax.xml.xpath.XPathConstants; |
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29 |
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30 import org.apache.log4j.Logger; |
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31 |
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32 import org.w3c.dom.Document; |
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33 import org.w3c.dom.Element; |
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34 import org.w3c.dom.NodeList; |
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35 |
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36 public class FixingsOverviewServiceImpl |
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37 extends RemoteServiceServlet |
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38 implements FixingsOverviewService |
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39 { |
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40 private static final Logger log = |
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41 Logger.getLogger(FixingsOverviewServiceImpl.class); |
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42 |
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43 public static final String SERVICE_NAME = "fixings-overview"; |
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44 |
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45 public static final String XSL_TRANSFORM = |
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46 "/WEB-INF/stylesheets/fixoverview2html.xsl"; |
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47 |
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48 protected static final String XPATH_RID = "/fixings/river/@rid"; |
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49 protected static final String XPATH_RIVER = "/fixings/river/@name"; |
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50 protected static final String XPATH_RFROM = "/fixings/river/@from"; |
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51 protected static final String XPATH_RTO = "/fixings/river/@to"; |
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52 |
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53 protected static final String XPATH_EVENT = "/fixings/events/event"; |
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54 |
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55 |
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56 @Override |
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57 public FixingsOverviewInfo generateOverview( |
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58 String locale, |
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59 String uuid, |
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60 String filter, |
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61 boolean checkboxes, |
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62 String callback |
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63 ) |
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64 throws ServerException |
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65 { |
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66 log.info("FixingsOverviewServiceImpl.doGet"); |
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67 |
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68 if (filter == null || filter.length() == 0) { |
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69 log.warn("Missing 'filter' parameter."); |
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70 return null; |
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71 } |
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72 |
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73 boolean debug = log.isDebugEnabled(); |
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74 |
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75 if (debug) { |
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76 log.debug("JSON filter: ------------------"); |
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77 log.debug(filter); |
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78 } |
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79 |
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80 Document filterDoc = XMLUtils.jsonToXML(filter); |
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81 |
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82 if (filterDoc == null) { |
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83 log.warn("Creating filter document failed."); |
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84 return null; |
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85 } |
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86 |
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87 if (debug) { |
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88 log.debug("XML filter: ------------------"); |
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89 log.debug(XMLUtils.toString(filterDoc)); |
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90 } |
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91 |
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92 try { |
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93 String url = getServletContext().getInitParameter("server-url"); |
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94 HttpClient client = new HttpClientImpl(url, locale); |
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95 Document resultDoc = |
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96 client.callService(url, SERVICE_NAME, filterDoc); |
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97 |
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98 if (debug) { |
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99 log.debug("Result XML: -----------"); |
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100 log.debug(XMLUtils.toString(resultDoc)); |
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101 } |
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102 |
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103 FixingsOverviewInfo i = getInfo( |
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104 locale, resultDoc, uuid, checkboxes, callback); |
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105 return i; |
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106 } |
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107 catch (ConnectionException ce) { |
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108 log.error(ce); |
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109 } |
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110 return null; |
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111 } |
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112 |
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113 |
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114 protected FixingsOverviewInfo getInfo( |
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115 String locale, |
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116 Document doc, |
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117 String uuid, |
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118 boolean checkboxes, |
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119 String callback |
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120 ) { |
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121 // TODO: Find a more general solution. |
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122 locale = locale == null || locale.toLowerCase().startsWith("de") |
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123 ? "de" |
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124 : "en"; |
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125 |
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126 InputStream transform = getServletContext() |
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127 .getResourceAsStream(XSL_TRANSFORM); |
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128 |
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129 if (transform == null) { |
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130 log.warn("transform not found"); |
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131 return null; |
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132 } |
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133 |
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134 String result = null; |
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135 try { |
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136 XSLTransformer xformer = new XSLTransformer(); |
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137 xformer.addParameter("locale", locale); |
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138 xformer.addParameter("project-uuid", uuid); |
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139 xformer.addParameter( |
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140 "render-checkboxes", |
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141 checkboxes ? Boolean.TRUE : Boolean.FALSE); |
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142 xformer.addParameter("callback", callback); |
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143 result = xformer.transform(doc, transform); |
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144 } |
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145 finally { |
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146 try { transform.close(); } |
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147 catch (IOException ioe) {} |
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148 } |
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149 |
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150 if (log.isDebugEnabled()) { |
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151 log.debug("--------------------------------------"); |
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152 log.debug(result); |
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153 log.debug("--------------------------------------"); |
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154 } |
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155 |
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156 int rid = -1; |
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157 double from = -1; |
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158 double to = -1; |
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159 |
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160 String rid_str = XMLUtils.xpathString(doc, XPATH_RID, null); |
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161 String river = XMLUtils.xpathString(doc, XPATH_RIVER, null); |
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162 String from_str = XMLUtils.xpathString(doc, XPATH_RFROM, null); |
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163 String to_str = XMLUtils.xpathString(doc, XPATH_RTO, null); |
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164 |
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165 try { |
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166 rid = Integer.parseInt(rid_str); |
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167 from = Double.parseDouble(from_str); |
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168 to = Double.parseDouble(to_str); |
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169 } |
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170 catch(NumberFormatException nfe) { |
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171 log.warn(nfe, nfe); |
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172 } |
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173 |
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174 List<FixEvent> fixEvents = getFixEvents(doc); |
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175 return new FixingsOverviewInfo( |
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176 rid, |
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177 river, |
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178 from, |
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179 to, |
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180 fixEvents, |
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181 result); |
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182 } |
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183 |
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184 |
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185 protected List<FixEvent> getFixEvents(Document doc) { |
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186 List<FixEvent> list = new ArrayList<FixEvent>(); |
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187 |
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188 NodeList events = (NodeList) XMLUtils.xpath( |
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189 doc, |
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190 XPATH_EVENT, |
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191 XPathConstants.NODESET, |
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192 null); |
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193 |
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194 if (events == null || events.getLength() == 0) { |
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195 log.warn("No events in Overview!"); |
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196 return list; |
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197 } |
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198 |
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199 for (int i = 0, E = events.getLength(); i < E; i++) { |
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200 Element n = (Element)events.item(i); |
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201 List<Sector> sectors = getSectors(n); |
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202 String cid = n.getAttribute("cid"); |
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203 String date = n.getAttribute("date");; |
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204 String name = n.getAttribute("description"); |
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205 list.add(new FixEvent( cid, date, name, sectors)); |
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206 } |
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207 return list; |
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208 } |
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209 |
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210 protected List<Sector> getSectors(Element event) { |
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211 NodeList sectors = event.getElementsByTagName("sector"); |
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212 |
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213 if (sectors.getLength() == 0) { |
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214 log.warn("No Sectors in Event!"); |
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215 return null; |
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216 } |
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217 |
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218 List<Sector> list = new ArrayList<Sector>(); |
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219 for (int i = 0, S = sectors.getLength(); i < S; i++) { |
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220 Element n = (Element)sectors.item(i); |
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221 int cls = -1; |
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222 double from = -1; |
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223 double to = -1; |
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224 String cls_str = n.getAttribute("class"); |
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225 String from_str = n.getAttribute("from"); |
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226 String to_str = n.getAttribute("to"); |
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227 try { |
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228 cls = Integer.parseInt(cls_str); |
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229 from = Double.parseDouble(from_str); |
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230 to = Double.parseDouble(to_str); |
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231 } |
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232 catch(NumberFormatException nfe) { |
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233 log.warn(nfe, nfe); |
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234 } |
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235 list.add(new Sector(cls, from, to)); |
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236 } |
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237 return list; |
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238 } |
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239 } |
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240 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |