Mercurial > hg > AnnotationManagerN4J

annotate src/main/java/de/mpiwg/itgroup/annotations/restlet/AnnotatorSearch.java @ 63:9f8c9611848a

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fixed bug with new rectangle shapes. added limit, offset and sortBy parameters to annotator/ and annotator/search.
author casties
date Fri, 23 Nov 2012 17:55:04 +0100
parents 0731c4549065
children 2b1e6df5e21a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /**
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2 * Implements the "search" uri of the Annotator API.
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3 */
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4 package de.mpiwg.itgroup.annotations.restlet;
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5
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6 import java.util.ArrayList;
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7 import java.util.List;
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8
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9 import org.json.JSONArray;
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10 import org.json.JSONException;
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11 import org.json.JSONObject;
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12 import org.restlet.data.Form;
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13 import org.restlet.data.Status;
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14 import org.restlet.ext.json.JsonRepresentation;
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15 import org.restlet.representation.Representation;
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16 import org.restlet.resource.Get;
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17
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18 import de.mpiwg.itgroup.annotations.Annotation;
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19 import de.mpiwg.itgroup.annotations.Person;
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20 import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore;
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21 import de.mpiwg.itgroup.annotations.restlet.utils.JSONObjectComparator;
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22
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23 /**
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24 * Implements the "search" uri of the Annotator API. see
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25 * <https://github.com/okfn/annotator/wiki/Storage>
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26 *
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27 * @author casties
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28 *
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29 */
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30 public class AnnotatorSearch extends AnnotatorResourceImpl {
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31
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32 protected String getAllowedMethodsForHeader() {
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33 return "OPTIONS,GET";
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34 }
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35
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36 /**
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37 * result for JSON content-type. optional search parameters: uri, user, limit,
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38 * offset, sortBy.
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39 *
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40 * @param entity
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41 * @return
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42 */
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43 @Get("json")
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44 public Representation doGetJSON(Representation entity) {
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45 logger.debug("AnnotatorSearch doGetJSON!");
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46 setCorsHeaders();
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47 // do authentication
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48 Person authUser = Person.createPersonWithId(this.checkAuthToken(entity));
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49 logger.debug("request authenticated=" + authUser);
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50
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51 Form form = getRequest().getResourceRef().getQueryAsForm();
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52 String uri = form.getFirstValue("uri");
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53 String user = form.getFirstValue("user");
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54 int limit = getInt(form.getFirstValue("limit"));
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55 int offset = getInt(form.getFirstValue("offset"));
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56 String sortBy = form.getFirstValue("sortBy");
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57
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58 // do search
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59 ArrayList<JSONObject> results = new ArrayList<JSONObject>();
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60 logger.debug(String.format("searching for uri=%s user=%s", uri, user));
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61 AnnotationStore store = getAnnotationStore();
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62 List<Annotation> annots = store.searchAnnotationByUriUser(uri, user);
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63 for (Annotation annot : annots) {
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64 // check permission
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65 if (!annot.isActionAllowed("read", authUser, store)) continue;
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66 JSONObject jo = createAnnotatorJson(annot, (authUser == null));
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67 if (jo != null) {
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68 results.add(jo);
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69 } else {
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70 setStatus(Status.SERVER_ERROR_INTERNAL, "JSON Error");
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71 return null;
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72 }
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73 }
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75 // sort if necessary
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76 if (sortBy != null) {
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77 JSONObjectComparator.sortAnnotations(results, sortBy);
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78 }
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79
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80 // put in JSON list
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81 JSONArray rows = new JSONArray();
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82 int cnt = 0;
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83 for (JSONObject result : results) {
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84 cnt += 1;
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85 if (offset > 0 && cnt < offset) continue;
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86 rows.put(result);
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87 if (limit > 0 && cnt >= limit) break;
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88 }
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90 // assemble result object
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91 JSONObject result = new JSONObject();
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92 try {
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93 result.put("rows", rows);
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94 result.put("total", rows.length());
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95 } catch (JSONException e) {
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96 setStatus(Status.SERVER_ERROR_INTERNAL, "JSON Error");
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97 return null;
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98 }
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99
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100 logger.debug("sending:");
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101 logger.debug(result);
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102 return new JsonRepresentation(result);
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103 }
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104
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105 }