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44
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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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65
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6 import java.io.UnsupportedEncodingException;
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7 import java.net.URLDecoder;
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8 import java.util.List;
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9
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10 import org.json.JSONArray;
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11 import org.json.JSONException;
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12 import org.json.JSONObject;
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13 import org.neo4j.graphdb.Node;
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14 import org.restlet.data.Status;
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15 import org.restlet.ext.json.JsonRepresentation;
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16 import org.restlet.representation.Representation;
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17 import org.restlet.resource.Get;
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18
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19 import de.mpiwg.itgroup.annotations.Resource;
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20 import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore;
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21
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22 /**
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61
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23 * API for accessing resource objects in the Annotation store.
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44
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24 *
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25 * @author dwinter
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61
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26 *
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27 */
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28 public class AnnotatorResources 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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61
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34 * GET with JSON content-type.
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35 * Parameters: user: short user name uri: user uri
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36 *
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37 * @param entity
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38 * @return
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39 */
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40 @Get("json")
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41 public Representation doGetJSON(Representation entity) {
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42 logger.debug("AnnotatorResources doGetJSON!");
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44
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43 setCorsHeaders();
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61
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44
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45 String jsonId = (String) getRequest().getAttributes().get("id");
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46 if (jsonId != null) {
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47 // URL decode
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48 try {
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49 jsonId = URLDecoder.decode(jsonId, "UTF-8");
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50 } catch (UnsupportedEncodingException e) {
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51 // this shouldn't happen
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52 }
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53 }
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54 String uri = decodeJsonId(jsonId);
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55
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56 logger.debug("resources-id=" + uri);
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57
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58 if (uri == null) {
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59 return getAllResources();
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44
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60 } else {
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61
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61 return getResource(uri);
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44
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62 }
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63 }
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64
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65 protected Representation getResource(String uri) {
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66 AnnotationStore store = getAnnotationStore();
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67 Node resNode = store.getResourceNodeByUri(uri);
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68 Resource resource = store.createResourceFromNode(resNode);
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69 JSONObject jo = new JSONObject();
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70 try {
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71 jo.put("id", encodeJsonId(resource.getUri()));
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72 jo.put("uri", resource.getUri());
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73 } catch (JSONException e) {
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74 }
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75
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76 return new JsonRepresentation(jo);
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77 }
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78
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79 protected Representation getAllResources() {
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80 JSONArray results = new JSONArray();
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81 AnnotationStore store = getAnnotationStore();
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82
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83 List<Resource> resources = store.getResources(null, null);
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84 for (Resource resource : resources) {
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85 JSONObject jo = new JSONObject();
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86 try {
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87 jo.put("id", encodeJsonId(resource.getUri()));
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88 jo.put("uri", resource.getUri());
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89 } catch (JSONException e) {
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90 }
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91 results.put(jo);
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92 }
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93
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94 // assemble result object
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95 JSONObject result = new JSONObject();
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96 try {
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97 result.put("rows", results);
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98 result.put("total", results.length());
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99 } catch (JSONException e) {
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100 setStatus(Status.SERVER_ERROR_INTERNAL, "JSON Error");
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101 return null;
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102 }
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103 logger.debug("sending:");
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104 logger.debug(result);
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105 return new JsonRepresentation(result);
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106 }
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107
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108 }
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