Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/FixingsOverviewServiceImpl.java @ 3497:88feb3347aa5

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Implement a ProxyServlet Implement a ProxyServlet to be able to restrict the access to the mapserver too. All queries to the provided map services should go throught this new ProxyServlet. Currently the ProxyServlet can only handle HTTP GET requests. flys-client/trunk@5221 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Bjoern Ricks <bjoern.ricks@intevation.de>
date Thu, 16 Aug 2012 14:42:36 +0000
parents 653dd9d7f5d5
children
rev   line source
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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")
653dd9d7f5d5 FixA: Introduce i18n to overview transformation.
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123 ? "de"
653dd9d7f5d5 FixA: Introduce i18n to overview transformation.
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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,
653dd9d7f5d5 FixA: Introduce i18n to overview transformation.
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177 river,
653dd9d7f5d5 FixA: Introduce i18n to overview transformation.
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diff changeset
178 from,
653dd9d7f5d5 FixA: Introduce i18n to overview transformation.
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179 to,
653dd9d7f5d5 FixA: Introduce i18n to overview transformation.
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180 fixEvents,
653dd9d7f5d5 FixA: Introduce i18n to overview transformation.
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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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diff changeset
205 list.add(new FixEvent( cid, date, name, sectors));
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206 }
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diff changeset
207 return list;
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diff changeset
208 }
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diff changeset
209
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diff changeset
210 protected List<Sector> getSectors(Element event) {
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diff changeset
211 NodeList sectors = event.getElementsByTagName("sector");
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diff changeset
212
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diff changeset
213 if (sectors.getLength() == 0) {
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diff changeset
214 log.warn("No Sectors in Event!");
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diff changeset
215 return null;
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diff changeset
216 }
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diff changeset
217
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diff changeset
218 List<Sector> list = new ArrayList<Sector>();
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diff changeset
219 for (int i = 0, S = sectors.getLength(); i < S; i++) {
d20f16a430a9 Removed some XPath misuse.
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parents: 2536
diff changeset
220 Element n = (Element)sectors.item(i);
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diff changeset
221 int cls = -1;
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diff changeset
222 double from = -1;
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diff changeset
223 double to = -1;
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parents: 2536
diff changeset
224 String cls_str = n.getAttribute("class");
d20f16a430a9 Removed some XPath misuse.
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parents: 2536
diff changeset
225 String from_str = n.getAttribute("from");
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parents: 2536
diff changeset
226 String to_str = n.getAttribute("to");
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diff changeset
227 try {
2915
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diff changeset
228 cls = Integer.parseInt(cls_str);
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diff changeset
229 from = Double.parseDouble(from_str);
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diff changeset
230 to = Double.parseDouble(to_str);
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diff changeset
231 }
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diff changeset
232 catch(NumberFormatException nfe) {
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diff changeset
233 log.warn(nfe, nfe);
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diff changeset
234 }
2915
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diff changeset
235 list.add(new Sector(cls, from, to));
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diff changeset
236 }
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diff changeset
237 return list;
2489
2a504b6d9a1b Added stub for fixings overview service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
238 }
2a504b6d9a1b Added stub for fixings overview service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
239 }
2a504b6d9a1b Added stub for fixings overview service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
240 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org