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1 package de.mpiwg.itgroup.annotations.restlet;
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2
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3 import java.io.UnsupportedEncodingException;
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4 import java.net.URLDecoder;
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5 import java.util.ArrayList;
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6 import java.util.List;
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7
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8 import org.json.JSONArray;
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9 import org.json.JSONException;
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10 import org.json.JSONObject;
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11 import org.restlet.data.Form;
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12 import org.restlet.data.Status;
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13 import org.restlet.ext.json.JsonRepresentation;
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14 import org.restlet.representation.Representation;
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15 import org.restlet.resource.Get;
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16
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17 import de.mpiwg.itgroup.annotations.Annotation;
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18 import de.mpiwg.itgroup.annotations.Person;
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19 import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore;
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20 import de.mpiwg.itgroup.annotations.restlet.utils.JSONObjectComparator;
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21
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22 /**
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23 * API for accessing tags in the Annotation store.
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24 *
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25 * @author dwinter
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26 *
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27 */
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28 public class AnnotatorAnnotationsByTags extends AnnotatorResourceImpl {
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29 protected String getAllowedMethodsForHeader() {
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30 return "OPTIONS,GET";
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31 }
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32
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33 @Get("json")
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34 public Representation doGetJSON(Representation entity) {
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35 logger.debug("AnnotatorAnnotatonsBytag doGetJSON!");
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36 setCorsHeaders();
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37
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37
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38 // do authentication
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39 Person authUser = Person.createPersonWithId(this.checkAuthToken(entity));
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40 logger.debug("request authenticated=" + authUser);
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41
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42 String id = (String) getRequest().getAttributes().get("id");
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43 // URL decode
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44 try {
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45 id = URLDecoder.decode(id, "UTF-8");
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46 } catch (UnsupportedEncodingException e) {
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47 // this shouldn't happen
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48 }
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49 logger.debug("annotation-id=" + id);
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50
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51 Form form = getRequest().getResourceRef().getQueryAsForm();
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52 String sortBy = form.getFirstValue("sortBy");
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53
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54 AnnotationStore store = getAnnotationStore();
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55 String tagUri = BaseRestlet.TAGS_URI_PREFIX + id;
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56 List<Annotation> annotations = store.getAnnotationsByTag(tagUri);
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57
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58 // JSONArray results = new JSONArray();
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59 ArrayList<JSONObject> results = new ArrayList<JSONObject>();
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60
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61 for (Annotation annot : annotations) {
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62 // check permission
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63 if (!annot.isActionAllowed("read", authUser, store))
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64 continue;
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66 JSONObject jo = createAnnotatorJson(annot, false);
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67 results.add(jo);
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68 }
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69
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70 if (sortBy != null) {
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71 JSONObjectComparator.sortAnnotations(results, sortBy);
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72 }
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73
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74 JSONArray resultsJa = new JSONArray();
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75 for (JSONObject result : results) {
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76 resultsJa.put(result);
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77 }
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78
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79 // assemble result object
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80 JSONObject result = new JSONObject();
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81 try {
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82 result.put("rows", resultsJa);
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83 result.put("total", resultsJa.length());
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84 } catch (JSONException e) {
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85 setStatus(Status.SERVER_ERROR_INTERNAL, "JSON Error");
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86 return null;
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87 }
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88 return new JsonRepresentation(result);
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89 }
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90
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91 } |
