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 | /* |
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7 | * #%L |
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8 | * AnnotationManager |
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9 | * %% |
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10 | * Copyright (C) 2012 - 2014 MPIWG Berlin |
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11 | * %% |
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12 | * This program is free software: you can redistribute it and/or modify |
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13 | * it under the terms of the GNU Lesser General Public License as |
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14 | * published by the Free Software Foundation, either version 3 of the |
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15 | * License, or (at your option) any later version. |
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16 | * |
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17 | * This program is distributed in the hope that it will be useful, |
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18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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20 | * GNU General Lesser Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU General Lesser Public |
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23 | * License along with this program. If not, see |
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24 | * <http://www.gnu.org/licenses/lgpl-3.0.html>. |
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25 | * #L% |
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26 | */ |
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27 | |
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28 | import java.io.UnsupportedEncodingException; |
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29 | import java.net.URLDecoder; |
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30 | import java.util.List; |
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31 | |
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32 | import org.json.JSONArray; |
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33 | import org.json.JSONException; |
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34 | import org.json.JSONObject; |
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35 | import org.neo4j.graphdb.Node; |
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36 | import org.restlet.data.Status; |
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37 | import org.restlet.ext.json.JsonRepresentation; |
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38 | import org.restlet.representation.Representation; |
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39 | import org.restlet.resource.Get; |
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40 | |
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41 | import de.mpiwg.itgroup.annotations.Tag; |
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42 | import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore; |
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43 | |
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44 | /** |
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45 | * API for accessing tags in the Annotation store. |
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46 | * |
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47 | * @author dwinter |
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48 | * |
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49 | */ |
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50 | public class AnnotatorTags extends AnnotatorResourceImpl { |
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51 | protected String getAllowedMethodsForHeader() { |
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52 | return "OPTIONS,GET"; |
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53 | } |
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54 | |
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55 | /** |
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56 | * GET with JSON content-type. |
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57 | * Parameters: |
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58 | * user: short user name |
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59 | * uri: user uri |
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60 | * |
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61 | * @param entity |
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62 | * @return |
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63 | */ |
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64 | @Get("json") |
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65 | public Representation doGetJSON(Representation entity) { |
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66 | logger.fine("AnnotatorGroups doGetJSON!"); |
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67 | setCorsHeaders(); |
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68 | |
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69 | String jsonId = (String) getRequest().getAttributes().get("id"); |
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70 | // String id = decodeJsonId(jsonId); |
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71 | String id = jsonId; |
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72 | logger.fine("annotation-id=" + id); |
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73 | |
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74 | if (id == null) { |
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75 | return getAllTags(); |
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76 | } else { |
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77 | // URL decode |
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78 | try { |
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79 | id = URLDecoder.decode(id, "UTF-8"); |
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80 | } catch (UnsupportedEncodingException e) { |
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81 | // this shouldn't happen |
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82 | } |
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83 | return getTag(id); |
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84 | } |
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85 | } |
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86 | |
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87 | protected Representation getTag(String id) { |
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88 | AnnotationStore store = getAnnotationStore(); |
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89 | String tagUri = BaseRestlet.TAGS_URI_PREFIX + id; |
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90 | Node tagNode = store.getTagNodeByUri(tagUri); |
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91 | Tag tag = store.createTagFromNode(tagNode); |
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92 | JSONObject jo = new JSONObject(); |
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93 | try { |
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94 | jo.put("id", tag.getId()); |
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95 | jo.put("name", tag.getName()); |
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96 | jo.put("uri", tag.getUri()); |
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97 | } catch (JSONException e) { |
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98 | } |
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99 | |
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100 | return new JsonRepresentation(jo); |
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101 | } |
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102 | |
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103 | protected Representation getAllTags() { |
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104 | JSONArray results = new JSONArray(); |
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105 | AnnotationStore store = getAnnotationStore(); |
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106 | |
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107 | List<Tag> tags = store.getTags(null, null); |
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108 | for (Tag tag : tags) { |
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109 | JSONObject jo = new JSONObject(); |
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110 | try { |
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111 | jo.put("id", tag.getId()); |
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112 | jo.put("name", tag.getName()); |
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113 | jo.put("uri", tag.getUri()); |
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114 | } catch (JSONException e) { |
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115 | } |
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116 | results.put(jo); |
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117 | } |
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118 | |
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119 | // assemble result object |
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120 | JSONObject result = new JSONObject(); |
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121 | try { |
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122 | result.put("rows", results); |
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123 | result.put("total", results.length()); |
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124 | } catch (JSONException e) { |
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125 | setStatus(Status.SERVER_ERROR_INTERNAL, "JSON Error"); |
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126 | return null; |
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127 | } |
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128 | logger.fine("sending:"); |
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129 | logger.fine(result.toString()); |
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130 | return new JsonRepresentation(result); |
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131 | } |
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132 | |
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133 | } |
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