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7
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1 //TODO: handle XML-Post des Annoteaprotocolls http://www.w3.org/2001/Annotea/User/Protocol.html
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2
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3 package de.mpiwg.itgroup.annotationManager.restlet;
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4
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5 import java.io.UnsupportedEncodingException;
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6 import java.net.URLDecoder;
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7 import java.net.URLEncoder;
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8 import java.util.ArrayList;
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9 import java.util.List;
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10 import java.util.regex.Matcher;
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11 import java.util.regex.Pattern;
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12
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13 import org.apache.log4j.Logger;
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14 import org.json.JSONArray;
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15 import org.json.JSONException;
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16 import org.json.JSONObject;
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17 import org.restlet.Context;
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18 import org.restlet.data.ClientInfo;
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19 import org.restlet.data.Form;
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20 import org.restlet.data.MediaType;
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21 import org.restlet.data.Status;
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22 import org.restlet.ext.json.JsonRepresentation;
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23 import org.restlet.representation.Representation;
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24 import org.restlet.representation.StringRepresentation;
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25 import org.restlet.resource.Get;
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26 import org.restlet.resource.Options;
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27 import org.restlet.resource.ServerResource;
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28 import org.restlet.security.User;
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29
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30 import de.mpiwg.itgroup.annotationManager.Constants.NS;
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31 import de.mpiwg.itgroup.annotationManager.Errors.TripleStoreSearchError;
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32 import de.mpiwg.itgroup.annotationManager.RDFHandling.Convert;
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33 import de.mpiwg.itgroup.annotationManager.RDFHandling.Convert.Annotation;
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34 import de.mpiwg.itgroup.annotationManager.RDFHandling.RDFSearcher;
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35 import de.mpiwg.itgroup.annotationManager.drupal.AnnotationHandler;
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36 import de.mpiwg.itgroup.annotationManager.drupal.UnknowUserException;
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37 import de.mpiwg.itgroup.triplestoremanager.exceptions.TripleStoreHandlerException;
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38
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39
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40 public class SearchAnnotations extends ServerResource {
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41
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42 private Logger logger = Logger.getRootLogger();
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43
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44
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45
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46 @Options
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47 public void doOptions(Representation entity) {
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48 Form responseHeaders = (Form) getResponse().getAttributes().get(
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49 "org.restlet.http.headers");
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50 if (responseHeaders == null) {
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51 responseHeaders = new Form();
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52 getResponse().getAttributes().put("org.restlet.http.headers",
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53 responseHeaders);
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54 }
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55 Form requestHeaders = (Form) getRequest().getAttributes().get("org.restlet.http.headers");
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56 String origin = requestHeaders.getFirstValue("Origin", true);
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57 if (origin == null) {
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58 responseHeaders.add("Access-Control-Allow-Origin", "*");
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59 } else {
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60 responseHeaders.add("Access-Control-Allow-Origin", origin);
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61 }
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62 responseHeaders.add("Access-Control-Allow-Methods", "OPTIONS,GET");
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63 String allowHeaders = requestHeaders.getFirstValue("Access-Control-Request-Headers", true);
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64 if (allowHeaders != null) {
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65 responseHeaders.add("Access-Control-Allow-Headers", allowHeaders);
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66 }
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67 //responseHeaders.add("Access-Control-Allow-Headers", "X-Requested-With, Content-Type, X-Annotator-Account-Id, X-Annotator-User-Id, X-Annotator-Auth-Token-Valid-Until, X-Annotator-Auth-Token");
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68 responseHeaders.add("Access-Control-Allow-Credentials", "true");
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69 responseHeaders.add("Access-Control-Max-Age", "60");
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70 }
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71
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72 @Get("html")
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73 public Representation doGetHTML(Representation entity){
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74
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75 doOptions(entity);
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76 Form form = getRequest().getResourceRef().getQueryAsForm();
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77 String uri = form.getFirstValue("uri");
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78 String user = form.getFirstValue("user");
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79
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80 String limit=form.getFirstValue("limit");
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81 String offset=form.getFirstValue("offset");
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82
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83 try {
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84 if (uri!=null){
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85 uri = URLDecoder.decode(uri, "utf-8");
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86 }
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87 } catch (UnsupportedEncodingException e1) {
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88 e1.printStackTrace();
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89 setStatus(Status.CLIENT_ERROR_NOT_ACCEPTABLE);
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90 return null;
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91 }
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92
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93 RDFSearcher searcher = new RDFSearcher("file:///annotations"); //TODO should ge into config file
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94
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95 String retString="<html><body><table>";
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96 String lineFormat="<tr><td><a href=\"%s\">%s</a></td>" +
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97 "<td><a href=\"%s\">%s</a></td><td>%s</td><td>%s</td><td><a href=\"%s\">%s</a></td><td><a href=\"%s\">%s</a></td></div>";
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98 try {
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99
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100 List<Convert.Annotation> annots=searcher.search(uri,user,limit,offset);
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101
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102 for (Convert.Annotation annot:annots){
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103
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104
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105 RestServer restServer = (RestServer) getApplication();
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106 String userName=restServer.getUserNameFromLdap(annot.creator);
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107 List<String> xpointer = new ArrayList<String>();
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108
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109 if (annot.xpointers==null || annot.xpointers.size()==0)
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110 retString+=String.format(lineFormat, userName,userName,annot.url,annot.url,annot.time,annot.text,annot.xpointer,annot.xpointer,annot.annotationUri,annot.annotationUri);
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111 else {
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112 for(String xpointerString:annot.xpointers){
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113 retString+=String.format(lineFormat, userName,userName,annot.url,annot.url,annot.time,annot.text,xpointerString,xpointerString,annot.annotationUri,annot.annotationUri);
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114 }
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115 }
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116
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117 }
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118 } catch (TripleStoreHandlerException e) {
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119 // TODO Auto-generated catch block
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120 e.printStackTrace();
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121 setStatus(Status.SERVER_ERROR_INTERNAL,"TripleStoreHandler Error");
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122 return null;
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123 } catch (TripleStoreSearchError e) {
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124 // TODO Auto-generated catch block
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125 e.printStackTrace();
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126 setStatus(Status.SERVER_ERROR_INTERNAL,"TripleStoreSearch Error");
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127 return null;
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128 }
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129
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130 retString+="</table></body></html>";
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131
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132 logger.debug("sending:");
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133 logger.debug(retString);
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134 return new StringRepresentation(retString,MediaType.TEXT_HTML);
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135 }
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136
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137 /**
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138 * Erzeugt aus einer Annotation, das f�r den Annotator notwendige JSON-Format
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139 * @param annot
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140 * @return
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141 */
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142 public JSONObject annot2AnnotatorJSON(Convert.Annotation annot){
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143 JSONObject jo = new JSONObject();
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144 try {
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145 jo.put("text", annot.text);
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146 jo.put("uri",annot.url);
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147
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148 JSONObject userObject= new JSONObject();
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149 userObject.put("id",annot.creator);
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150
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151 RestServer restServer = (RestServer) getApplication();
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152
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153 String userID= annot.creator;
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154 if (userID.startsWith(NS.MPIWG_PERSONS)){
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155 userID=userID.replace(NS.MPIWG_PERSONS, ""); //entferne NAMESPACE
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156 }
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157 String userName=restServer.getUserNameFromLdap(userID);
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158 userObject.put("name",userName);
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159
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160 jo.put("user",userObject);
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161
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162 List<String> xpointer = new ArrayList<String>();
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163
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164 if (annot.xpointers==null || annot.xpointers.size()==0)
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165 xpointer.add(annot.xpointer);
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166 else {
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167 for(String xpointerString:annot.xpointers){
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168 xpointer.add(xpointerString);
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169 }
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170 }
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171 jo.put("ranges", transformToRanges(xpointer));
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172 jo.put("id", annot.annotationUri);
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173 return jo;
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174 } catch (JSONException e) {
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175 // TODO Auto-generated catch block
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176 e.printStackTrace();
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177 return null;
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178 }
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179 }
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180
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181 @Get("json")
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182 public Representation doGetJSON(Representation entity){
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183
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184 doOptions(entity);
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185 Form form = getRequest().getResourceRef().getQueryAsForm();
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186 String uri = form.getFirstValue("uri");
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187 String user = form.getFirstValue("user");
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188
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189 String limit=form.getFirstValue("limit");
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190 String offset=form.getFirstValue("offset");
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191
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192
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193 //
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194 RDFSearcher searcher = new RDFSearcher("file:///annotations"); //TODO should ge into config file
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195
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196 JSONArray ja;
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197 try {
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198
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199 List<Convert.Annotation> annots=searcher.search(uri,user,limit,offset);
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200
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201 ja = new JSONArray();
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202 for (Convert.Annotation annot:annots){
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203 // JSONObject jo = new JSONObject();
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204 // jo.put("text", annot.text);
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205 // jo.put("uri",annot.url);
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206 //
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207 // JSONObject userObject= new JSONObject();
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208 // userObject.put("id",annot.creator);
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209 //
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210 // RestServer restServer = (RestServer) getApplication();
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211 //
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212 // String userID= annot.creator;
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213 // if (userID.startsWith(NS.MPIWG_PERSONS)){
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214 // userID=userID.replace(NS.MPIWG_PERSONS, ""); //entferne NAMESPACE
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215 // }
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216 // String userName=restServer.getUserNameFromLdap(userID);
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217 // userObject.put("name",userName);
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218 //
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219 // jo.put("user",userObject);
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220 //
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221 // List<String> xpointer = new ArrayList<String>();
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222 //
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223 // if (annot.xpointers==null || annot.xpointers.size()==0)
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224 // xpointer.add(annot.xpointer);
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225 // else {
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226 // for(String xpointerString:annot.xpointers){
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227 // xpointer.add(xpointerString);
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228 // }
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229 // }
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230 // jo.put("ranges", transformToRanges(xpointer));
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231 JSONObject jo = annot2AnnotatorJSON(annot);
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232 if (jo!=null){
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233 ja.put(annot2AnnotatorJSON(annot));
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234 } else {
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235 setStatus(Status.SERVER_ERROR_INTERNAL,"JSon Error");
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236 return null;
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237 }
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238 }
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239 } catch (TripleStoreHandlerException e) {
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240 // TODO Auto-generated catch block
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241 e.printStackTrace();
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242 setStatus(Status.SERVER_ERROR_INTERNAL,"TripleStoreHandler Error");
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243 return null;
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244 } catch (TripleStoreSearchError e) {
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245 // TODO Auto-generated catch block
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246 e.printStackTrace();
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247 setStatus(Status.SERVER_ERROR_INTERNAL,"TripleStoreSearch Error");
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248 return null;
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249 }
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250
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251 JSONObject result = new JSONObject();
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252 try {
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253 result.put("rows",ja);
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254 result.put("total",ja.length());
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255 } catch (JSONException e) {
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256 // TODO Auto-generated catch block
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257 e.printStackTrace();
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258 setStatus(Status.SERVER_ERROR_INTERNAL,"JSon Error");
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259 return null;
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260 }
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261
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262 logger.debug("sending:");
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263 logger.debug(result);
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264 return new JsonRepresentation(result);
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265 }
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266
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267 private JSONArray transformToRanges(List<String> xpointers) {
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268
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269 JSONArray ja = new JSONArray();
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270
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271 Pattern rg = Pattern.compile("#xpointer\\(start-point\\(string-range\\(\"([^\"]*)\",([^,]*),1\\)\\)/range-to\\(end-point\\(string-range\\(\"([^\"]*)\",([^,]*),1\\)\\)\\)\\)");
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272 Pattern rg1 = Pattern.compile("#xpointer\\(start-point\\(string-range\\(\"([^\"]*)\",([^,]*),1\\)\\)\\)");
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273
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274
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275
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276 try {
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277 for(String xpointer:xpointers){
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278 String decoded =URLDecoder.decode(xpointer,"utf-8");
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279 Matcher m=rg.matcher(decoded);
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280
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281 if (m.find()){
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282 {
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283 JSONObject jo = new JSONObject();
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284 jo.put("start", m.group(1));
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285 jo.put("startOffset", m.group(2));
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286 jo.put("end", m.group(3));
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287 jo.put("endOffset", m.group(4));
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288 ja.put(jo);
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289 }
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290 }
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291 m=rg1.matcher(xpointer);
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292 if (m.find()){
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293 JSONObject jo = new JSONObject();
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294 jo.put("start", m.group(1));
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295 jo.put("startOffset", m.group(2));
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296
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297 ja.put(jo);
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298 }
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299
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300
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301 }
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302 } catch (JSONException e) {
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303 // TODO Auto-generated catch block
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304 e.printStackTrace();
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305 } catch (UnsupportedEncodingException e) {
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306 // TODO Auto-generated catch block
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307 e.printStackTrace();
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308 }
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309
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310
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311 return ja;
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312 }
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313
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314
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315
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316 /**
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317 *
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318 * @param entity should contain a form with the parameters "username", "password", "xpointer","text","uri","type"
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319 *
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320 * username,password is optional, if not given BasicAuthentification is used.
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321 *
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322 *
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323 *
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324 * If username given as a URI, the username will be transformed to an URI, username will be added to the MPIWG namespace defined in de.mpiwg.itgroup.annotationManager.Constants.NS
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325 *
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326 * @return
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327 */
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328 protected Convert.Annotation handleForm(Representation entity) {
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329 Convert.Annotation annot;
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330 Form form = new Form(entity);
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331 String username = form.getValues("username");
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332 String mode = form.getValues("mode");
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333 String password = form.getValues("password");
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334 String xpointer = form.getValues("xpointer");
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335 String text = form.getValues("text");
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336 String title = form.getValues("title");
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337 String url = form.getValues("url");
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338 String type = form.getValues("type");
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339 RestServer restServer = (RestServer) getApplication();
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340
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341 // falls user and password nicht null sind:
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342 User userFromForm = null;
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343 if (username != null && password != null) {
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344 if (restServer.authenticate(username, password, getRequest())) {
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345 userFromForm = new User(username);
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346 }
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347 }
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348 User authUser = null;
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349
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350 if (userFromForm == null) {
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351 authUser = handleBasicAuthentification(entity);
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352 }
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353
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354 // weder BasicAuth noch FormAuth
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355 if (authUser == null && userFromForm == null) {
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356 setStatus(Status.CLIENT_ERROR_FORBIDDEN);
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357 return null;
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358 }
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359
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360 if (userFromForm != null) {
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361 username = userFromForm.getIdentifier();
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362 } else {
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363 username = authUser.getIdentifier();
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364 }
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365
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366 //username should be a URI, if not it will set to the MPIWG namespace defined in de.mpiwg.itgroup.annotationManager.Constants.NS
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367 String usernameOrig=username;
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368 if (!username.startsWith("http"))
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369 username=NS.MPIWG_PERSONS+username;
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370
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371 if (mode.equals("complexAnnotation")){// Annotation mit text in externer ressource
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372
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373 Context context = getContext();
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374 String drupalPath = context.getParameters().getFirstValue("de.mpiwg.itgroup.annotationManager.drupalServer");
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375
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376
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377 AnnotationHandler ah = new AnnotationHandler(drupalPath);
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378 JSONObject newAnnot;
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379 try {
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380 newAnnot = ah.createAnnotation(title, text, usernameOrig, password);
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381 } catch (UnknowUserException e1) {
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382 setStatus(Status.CLIENT_ERROR_FORBIDDEN);
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383 e1.printStackTrace();
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384 return null;
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385 }
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386 try {
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387 annot= new Convert.Annotation(xpointer, username, null, text, type, newAnnot.getString("node_uri"));
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388 } catch (JSONException e) {
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389 // TODO Auto-generated catch block
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390 e.printStackTrace();
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391 setStatus(Status.SERVER_ERROR_INTERNAL);
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392 return null;
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393 }
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394 } else
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395 annot = new Convert.Annotation(xpointer, username, null, text,
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396 type, url);
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397 return annot;
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398 }
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399
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400 private User handleBasicAuthentification(Representation entity) {
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401 RestServer restServer = (RestServer) getApplication();
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402 if (!restServer.authenticate(getRequest(), getResponse())) {
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403 // Not authenticated
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404 return null;
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405 }
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406
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407 ClientInfo ci = getRequest().getClientInfo();
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408 logger.debug(ci);
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409 return getRequest().getClientInfo().getUser();
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410
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411 }
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412
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413 /**
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414 * using a minimal annotation format based on the annotea specification
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415 *
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416 * @param jo
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417 * must contain xpointer, text,url,type and can contain a
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418 * username, if not the username form the authentification will
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419 * be used.
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420 * @param authUser
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421 * user object
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422 * The username will be transformed to an URI if not given already as URI, if not it will set to the MPIWG namespace defined in de.mpiwg.itgroup.annotationManager.Constants.NS
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423
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424 * @return
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425 * @throws JSONException
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426 */
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427 public Annotation handleAnnotea(JSONObject jo, Representation entity)
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428 throws JSONException {
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429
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430 User authUser = handleBasicAuthentification(entity);
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431 String username = jo.getString("username"); // not required, if no
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432 // username given authuser
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433 // will be used.
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434 String xpointer = jo.getString("xpointer");
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435 String text = null;
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436 if (jo.has("text"))
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437 text = jo.getString("text");
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438
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439 String url = null;
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440 if (jo.has("url"))
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441 url = jo.getString("url");
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442
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443 String type = null;
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444 if (jo.has("type"))
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445 type = jo.getString("type");
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446
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447 if (username == null)
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448 username = authUser.getIdentifier();
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449
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450 //username should be a URI, if not it will set to the MPIWG namespace defined in de.mpiwg.itgroup.annotationManager.Constants.NS
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451 if (!username.startsWith("http"))
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452 username=NS.MPIWG_PERSONS+username;
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453
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454 return new Convert.Annotation(xpointer, username, null, text, type, url);
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455 }
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456
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457 /**
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458 * uses the specification from the annotator project.
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459 *
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460 * @see{https://github.com/okfn/annotator/wiki/Annotation-format} The user
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461 * object must
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462 * contain an
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463 * id and
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464 * password or
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465 * basic
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466 * authentification
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467 * is used.
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468 * The username will be transformed to an URI if not given already as URI, if not it will set to the MPIWG namespace defined in de.mpiwg.itgroup.annotationManager.Constants.NS
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469 * @param jo
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470 * @param authUser
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471 * @return
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472 * @throws JSONException
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473 */
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474 public Convert.Annotation handleAnnotatorSchema(JSONObject jo,
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475 Representation entity) throws JSONException {
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476 Convert.Annotation annot;
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477 String url = jo.getString("uri");
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478 String text = jo.getString("text");
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479
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480 String username = null;
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481 if (jo.has("user")) { // not required, if no username given authuser
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482 // will be used otherwise username and password
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483 // has to be submitted
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484 JSONObject user = jo.getJSONObject("user");
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485 if (user.has("id")) {
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486 username = user.getString("id");
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487 if(!user.has("password")){
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488 User authUser = handleBasicAuthentification(entity);
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489 if (authUser==null){
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490 setStatus(Status.CLIENT_ERROR_FORBIDDEN);
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491 return null;
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492 }
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493 username = authUser.getIdentifier();
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494 } else {
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495 String password = user.getString("password");
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496 if (!((RestServer) getApplication()).authenticate(username,
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497 password, getRequest())) {
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498 setStatus(Status.CLIENT_ERROR_FORBIDDEN);
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499 return null;
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500 }
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501 }
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502 }
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503
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504 } else {
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505 User authUser = handleBasicAuthentification(entity);
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506 if (authUser == null) {
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507 setStatus(Status.CLIENT_ERROR_FORBIDDEN);
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508 return null;
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509 }
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510 username = authUser.getIdentifier();
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511 }
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512
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513 String xpointer;
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514 if (jo.has("ranges")) {
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515 JSONObject ranges = jo.getJSONArray("ranges").getJSONObject(0);
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516 String start = ranges.getString("start");
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517 String end = ranges.getString("end");
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518 String startOffset = ranges.getString("startOffset");
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519 String endOffset = ranges.getString("endOffset");
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520
|
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521 try {
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522 xpointer = url+"#"+
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|
|
523 URLEncoder.encode(String.format(
|
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|
524 "xpointer(start-point(string-range(\"%s\",%s,1))/range-to(end-point(string-range(\"%s\",%s,1))))",
|
|
|
525 start, startOffset, end, endOffset),"utf-8");
|
|
|
526 } catch (UnsupportedEncodingException e) {
|
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|
527 e.printStackTrace();
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528 setStatus(Status.SERVER_ERROR_INTERNAL);
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529 return null;
|
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|
530 }
|
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|
531 } else {
|
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532 xpointer = url;
|
|
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533 }
|
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534
|
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|
535 //username should be a URI, if not it will set to the MPIWG namespace defined in de.mpiwg.itgroup.annotationManager.Constants.NS
|
|
|
536 if (!username.startsWith("http"))
|
|
|
537 username=NS.MPIWG_PERSONS+username;
|
|
|
538
|
|
|
539 return new Convert.Annotation(xpointer, username, null, text, null);
|
|
|
540 }
|
|
|
541
|
|
|
542 }
|
