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28
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1 /**
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2 * ReST API for accessing groups in the Annotation store.
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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.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.neo4j.graphdb.Node;
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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.NS;
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18 import de.mpiwg.itgroup.annotations.Tag;
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19 import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore;
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20
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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 AnnotatorTags 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 /**
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34 * GET with JSON content-type.
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35 * Parameters:
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36 * user: short user name
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37 * uri: user uri
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38 *
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39 * @param entity
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40 * @return
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41 */
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42 @Get("json")
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43 public Representation doGetJSON(Representation entity) {
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44 logger.debug("AnnotatorGroups doGetJSON!");
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45 setCorsHeaders();
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46
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47 String jsonId = (String) getRequest().getAttributes().get("id");
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48 //String id = decodeJsonId(jsonId);
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49 String id = jsonId;
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50 logger.debug("annotation-id=" + id);
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51
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52 if (id==null){
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53 return getAllTags();
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54 } else {
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55
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56 return getTag(id);
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57 }
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58 }
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59
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60 protected Representation getTag(String id){
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61 AnnotationStore store = getAnnotationStore();
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62 String tagUri=NS.MPIWG_TAGS_URL+id;
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63 Node tagNode = store.getTagNodeByUri(tagUri);
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64 Tag tag = store.createTagFromNode(tagNode);
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65 JSONObject jo = new JSONObject();
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66 try {
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67 jo.put("id", tag.getId());
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68 jo.put("name", tag.getName());
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69 jo.put("uri", tag.getUri());
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70 } catch (JSONException e) {
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71 }
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72
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73 return new JsonRepresentation(jo);
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74 }
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75 protected Representation getAllTags() {
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76 JSONArray results = new JSONArray();
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77 AnnotationStore store = getAnnotationStore();
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78
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79
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80 List<Tag> tags = store.getTags(null, null);
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81 for (Tag tag : tags) {
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82 JSONObject jo = new JSONObject();
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83 try {
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84 jo.put("id", tag.getId());
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85 jo.put("name", tag.getName());
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86 jo.put("uri", tag.getUri());
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87 } catch (JSONException e) {
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88 }
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89 results.put(jo);
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90 }
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91
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92 // assemble result object
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93 JSONObject result = new JSONObject();
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94 try {
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95 result.put("rows", results);
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96 result.put("total", results.length());
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97 } catch (JSONException e) {
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98 setStatus(Status.SERVER_ERROR_INTERNAL, "JSON Error");
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99 return null;
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100 }
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101 logger.debug("sending:");
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102 logger.debug(result);
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103 return new JsonRepresentation(result);
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104 }
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105
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106
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107
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108 }
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