1 | package de.mpiwg.itgroup.annotations.restlet; |
---|
2 | |
---|
3 | /* |
---|
4 | * #%L |
---|
5 | * AnnotationManager |
---|
6 | * %% |
---|
7 | * Copyright (C) 2012 - 2014 MPIWG Berlin |
---|
8 | * %% |
---|
9 | * This program is free software: you can redistribute it and/or modify |
---|
10 | * it under the terms of the GNU Lesser General Public License as |
---|
11 | * published by the Free Software Foundation, either version 3 of the |
---|
12 | * License, or (at your option) any later version. |
---|
13 | * |
---|
14 | * This program is distributed in the hope that it will be useful, |
---|
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
17 | * GNU General Lesser Public License for more details. |
---|
18 | * |
---|
19 | * You should have received a copy of the GNU General Lesser Public |
---|
20 | * License along with this program. If not, see |
---|
21 | * <http://www.gnu.org/licenses/lgpl-3.0.html>. |
---|
22 | * #L% |
---|
23 | */ |
---|
24 | |
---|
25 | import java.io.UnsupportedEncodingException; |
---|
26 | import java.text.SimpleDateFormat; |
---|
27 | import java.util.ArrayList; |
---|
28 | import java.util.Calendar; |
---|
29 | import java.util.HashSet; |
---|
30 | import java.util.List; |
---|
31 | import java.util.Set; |
---|
32 | import java.util.logging.Logger; |
---|
33 | import java.util.regex.Matcher; |
---|
34 | import java.util.regex.Pattern; |
---|
35 | |
---|
36 | import net.oauth.jsontoken.Checker; |
---|
37 | import net.oauth.jsontoken.JsonToken; |
---|
38 | import net.oauth.jsontoken.JsonTokenParser; |
---|
39 | import net.oauth.jsontoken.SystemClock; |
---|
40 | import net.oauth.jsontoken.crypto.HmacSHA256Verifier; |
---|
41 | import net.oauth.jsontoken.crypto.Verifier; |
---|
42 | |
---|
43 | import org.apache.commons.codec.binary.Base64; |
---|
44 | import org.json.JSONArray; |
---|
45 | import org.json.JSONException; |
---|
46 | import org.json.JSONObject; |
---|
47 | import org.restlet.data.Header; |
---|
48 | import org.restlet.data.Status; |
---|
49 | import org.restlet.representation.Representation; |
---|
50 | import org.restlet.resource.ServerResource; |
---|
51 | import org.restlet.util.Series; |
---|
52 | |
---|
53 | import com.google.gson.JsonArray; |
---|
54 | import com.google.gson.JsonElement; |
---|
55 | import com.google.gson.JsonObject; |
---|
56 | |
---|
57 | import de.mpiwg.itgroup.annotations.Actor; |
---|
58 | import de.mpiwg.itgroup.annotations.Annotation; |
---|
59 | import de.mpiwg.itgroup.annotations.Annotation.FragmentTypes; |
---|
60 | import de.mpiwg.itgroup.annotations.Group; |
---|
61 | import de.mpiwg.itgroup.annotations.Person; |
---|
62 | import de.mpiwg.itgroup.annotations.Resource; |
---|
63 | import de.mpiwg.itgroup.annotations.Target; |
---|
64 | import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore; |
---|
65 | |
---|
66 | /** |
---|
67 | * Base class for Annotator resource classes. |
---|
68 | * |
---|
69 | * @author dwinter, casties |
---|
70 | * |
---|
71 | */ |
---|
72 | public abstract class AnnotatorResourceImpl extends ServerResource { |
---|
73 | |
---|
74 | protected static Logger logger = Logger.getLogger(AnnotatorResourceImpl.class.getCanonicalName()); |
---|
75 | |
---|
76 | private AnnotationStore store; |
---|
77 | |
---|
78 | protected AnnotationStore getAnnotationStore() { |
---|
79 | if (store == null) { |
---|
80 | store = ((BaseRestlet) getApplication()).getAnnotationStore(); |
---|
81 | } |
---|
82 | return store; |
---|
83 | } |
---|
84 | |
---|
85 | public String encodeJsonId(String id) { |
---|
86 | if (id == null) |
---|
87 | return null; |
---|
88 | try { |
---|
89 | return Base64.encodeBase64URLSafeString(id.getBytes("UTF-8")); |
---|
90 | } catch (UnsupportedEncodingException e) { |
---|
91 | return null; |
---|
92 | } |
---|
93 | } |
---|
94 | |
---|
95 | public String decodeJsonId(String id) { |
---|
96 | if (id == null) |
---|
97 | return null; |
---|
98 | try { |
---|
99 | return new String(Base64.decodeBase64(id), "UTF-8"); |
---|
100 | } catch (UnsupportedEncodingException e) { |
---|
101 | return null; |
---|
102 | } |
---|
103 | } |
---|
104 | |
---|
105 | /** |
---|
106 | * returns if authentication information from headers is valid. |
---|
107 | * |
---|
108 | * @param entity |
---|
109 | * @return |
---|
110 | */ |
---|
111 | public boolean isAuthenticated(Representation entity) { |
---|
112 | return (getUserFromAuthToken(entity) != null); |
---|
113 | } |
---|
114 | |
---|
115 | /** |
---|
116 | * Checks Annotator Auth plugin authentication information from headers. |
---|
117 | * Returns userId if successful. Returns "anonymous" in non-authorization |
---|
118 | * mode. |
---|
119 | * |
---|
120 | * @param entity |
---|
121 | * @return user-id |
---|
122 | */ |
---|
123 | public Person getUserFromAuthToken(Representation entity) { |
---|
124 | @SuppressWarnings("unchecked") |
---|
125 | Series<Header> requestHeaders = (Series<Header>) getRequest().getAttributes().get("org.restlet.http.headers"); |
---|
126 | String authToken = requestHeaders.getFirstValue("x-annotator-auth-token", true); |
---|
127 | if (authToken == null) { |
---|
128 | if (!((BaseRestlet) getApplication()).isAuthorizationMode()) { |
---|
129 | // no token, no-auth mode -> anonymous |
---|
130 | return Person.getAnonymous(); |
---|
131 | } |
---|
132 | // no token, auth mode -> null |
---|
133 | return null; |
---|
134 | } |
---|
135 | try { |
---|
136 | // decode token first to get consumer key |
---|
137 | JsonToken token = new JsonTokenParser(null, null).deserialize(authToken); |
---|
138 | String consumerKey = token.getParamAsPrimitive("consumerKey").getAsString(); |
---|
139 | // get stored consumer secret for key |
---|
140 | BaseRestlet restServer = (BaseRestlet) getApplication(); |
---|
141 | String consumerSecret = restServer.getConsumerSecret(consumerKey); |
---|
142 | logger.fine("requested consumer key=" + consumerKey + " secret=" + consumerSecret); |
---|
143 | if (consumerSecret == null) { |
---|
144 | logger.warning("Error: unknown consumer key: "+consumerKey); |
---|
145 | return null; |
---|
146 | } |
---|
147 | // logger.fine(String.format("token=%s tokenString=%s signatureAlgorithm=%s",token,token.getTokenString(),token.getSignatureAlgorithm())); |
---|
148 | List<Verifier> verifiers = new ArrayList<Verifier>(); |
---|
149 | // we only do HS256 yet |
---|
150 | verifiers.add(new HmacSHA256Verifier(consumerSecret.getBytes("UTF-8"))); |
---|
151 | // verify token signature(should really be static...) |
---|
152 | new JsonTokenParser(new SystemClock(), null, (Checker[]) null).verify(token, verifiers); |
---|
153 | // create Person |
---|
154 | JsonObject payload = token.getPayloadAsJsonObject(); |
---|
155 | // userId is mandatory |
---|
156 | String userId = payload.get("userId").getAsString(); |
---|
157 | Person user = new Person(userId); |
---|
158 | // displayName is optional |
---|
159 | if (payload.has("displayName")) { |
---|
160 | user.name = payload.get("displayName").getAsString(); |
---|
161 | } |
---|
162 | // memberOf groups is optional |
---|
163 | if (payload.has("memberOf")) { |
---|
164 | Set<String> groups = new HashSet<String>(); |
---|
165 | JsonArray jgroups = payload.get("memberOf").getAsJsonArray(); |
---|
166 | for (JsonElement jgroup : jgroups) { |
---|
167 | groups.add(jgroup.getAsString()); |
---|
168 | } |
---|
169 | user.groups = groups; |
---|
170 | } |
---|
171 | logger.fine("auth OK! user=" + user); |
---|
172 | return user; |
---|
173 | } catch (Exception e) { |
---|
174 | logger.warning("Error checking auth token: "+e.toString()); |
---|
175 | } |
---|
176 | return null; |
---|
177 | } |
---|
178 | |
---|
179 | /** |
---|
180 | * creates Annotator-JSON from an Annotation object. |
---|
181 | * |
---|
182 | * @param annot annotation object |
---|
183 | * @param forAnonymous |
---|
184 | * @return Annotator-JSON |
---|
185 | */ |
---|
186 | public JSONObject createAnnotatorJson(Annotation annot, boolean forAnonymous) { |
---|
187 | // return user as a JSON object (otherwise just as string) |
---|
188 | boolean makeUserObject = true; |
---|
189 | JSONObject jo = new JSONObject(); |
---|
190 | try { |
---|
191 | jo.put("text", annot.getBodyText()); |
---|
192 | jo.put("uri", annot.getTargetBaseUri()); |
---|
193 | if (annot.getResourceUri() != null) { |
---|
194 | jo.put("resource", annot.getResourceUri()); |
---|
195 | } |
---|
196 | if (annot.getQuote() != null) { |
---|
197 | jo.put("quote", annot.getQuote()); |
---|
198 | } |
---|
199 | |
---|
200 | /* |
---|
201 | * user |
---|
202 | */ |
---|
203 | Actor creator = annot.getCreator(); |
---|
204 | if (creator != null) { |
---|
205 | if (makeUserObject) { |
---|
206 | // create user object |
---|
207 | JSONObject userObject = new JSONObject(); |
---|
208 | // save creator as uri |
---|
209 | userObject.put("uri", creator.getUri()); |
---|
210 | // make short user id |
---|
211 | String userId = creator.getIdString(); |
---|
212 | // set as id |
---|
213 | userObject.put("id", userId); |
---|
214 | // get full name |
---|
215 | String userName = creator.getName(); |
---|
216 | if (userName == null) { |
---|
217 | BaseRestlet restServer = (BaseRestlet) getApplication(); |
---|
218 | userName = restServer.getFullNameForId(userId); |
---|
219 | } |
---|
220 | userObject.put("name", userName); |
---|
221 | // save user object |
---|
222 | jo.put("user", userObject); |
---|
223 | } else { |
---|
224 | // save user as string |
---|
225 | jo.put("user", annot.getCreatorUri()); |
---|
226 | } |
---|
227 | } |
---|
228 | |
---|
229 | /* |
---|
230 | * ranges |
---|
231 | */ |
---|
232 | if (annot.getTargetFragment() != null) { |
---|
233 | // we only look at the first xpointer |
---|
234 | List<String> fragments = new ArrayList<String>(); |
---|
235 | fragments.add(annot.getTargetFragment()); |
---|
236 | FragmentTypes xt = annot.getFragmentType(); |
---|
237 | if (xt == FragmentTypes.XPOINTER) { |
---|
238 | jo.put("ranges", transformToRanges(fragments)); |
---|
239 | } else if (xt == FragmentTypes.AREA) { |
---|
240 | jo.put("shapes", transformToShapes(fragments)); |
---|
241 | } else if (xt == FragmentTypes.WKT) { |
---|
242 | jo.put("shapes", transformToShapes(fragments)); |
---|
243 | } |
---|
244 | } |
---|
245 | |
---|
246 | /* |
---|
247 | * permissions |
---|
248 | */ |
---|
249 | JSONObject perms = new JSONObject(); |
---|
250 | jo.put("permissions", perms); |
---|
251 | // admin |
---|
252 | JSONArray adminPerms = new JSONArray(); |
---|
253 | perms.put("admin", adminPerms); |
---|
254 | Actor adminPerm = annot.getAdminPermission(); |
---|
255 | if (adminPerm != null) { |
---|
256 | adminPerms.put(adminPerm.getIdString()); |
---|
257 | } else if (forAnonymous) { |
---|
258 | // set something because its not allowed for anonymous |
---|
259 | adminPerms.put("not-you"); |
---|
260 | } |
---|
261 | // delete |
---|
262 | JSONArray deletePerms = new JSONArray(); |
---|
263 | perms.put("delete", deletePerms); |
---|
264 | Actor deletePerm = annot.getDeletePermission(); |
---|
265 | if (deletePerm != null) { |
---|
266 | deletePerms.put(deletePerm.getIdString()); |
---|
267 | } else if (forAnonymous) { |
---|
268 | // set something because its not allowed for anonymous |
---|
269 | deletePerms.put("not-you"); |
---|
270 | } |
---|
271 | // update |
---|
272 | JSONArray updatePerms = new JSONArray(); |
---|
273 | perms.put("update", updatePerms); |
---|
274 | Actor updatePerm = annot.getUpdatePermission(); |
---|
275 | if (updatePerm != null) { |
---|
276 | updatePerms.put(updatePerm.getIdString()); |
---|
277 | } else if (forAnonymous) { |
---|
278 | // set something because its not allowed for anonymous |
---|
279 | updatePerms.put("not-you"); |
---|
280 | } |
---|
281 | // read |
---|
282 | JSONArray readPerms = new JSONArray(); |
---|
283 | perms.put("read", readPerms); |
---|
284 | Actor readPerm = annot.getReadPermission(); |
---|
285 | if (readPerm != null) { |
---|
286 | readPerms.put(readPerm.getIdString()); |
---|
287 | } |
---|
288 | |
---|
289 | /* |
---|
290 | * tags |
---|
291 | */ |
---|
292 | Set<String> tagset = annot.getTags(); |
---|
293 | if (tagset != null) { |
---|
294 | JSONArray tags = new JSONArray(); |
---|
295 | jo.put("tags", tags); |
---|
296 | for (String tag : tagset) { |
---|
297 | tags.put(tag); |
---|
298 | } |
---|
299 | } |
---|
300 | |
---|
301 | /* |
---|
302 | * id |
---|
303 | */ |
---|
304 | // encode Annotation URL (=id) in base64 |
---|
305 | String annotUrl = annot.getUri(); |
---|
306 | String annotId = encodeJsonId(annotUrl); |
---|
307 | jo.put("id", annotId); |
---|
308 | return jo; |
---|
309 | } catch (JSONException e) { |
---|
310 | logger.severe("Unable to create AnnotatorJSON! "+e); |
---|
311 | } |
---|
312 | return null; |
---|
313 | } |
---|
314 | |
---|
315 | private JSONArray transformToRanges(List<String> xpointers) { |
---|
316 | JSONArray ja = new JSONArray(); |
---|
317 | Pattern rg = Pattern |
---|
318 | .compile("xpointer\\(start-point\\(string-range\\(\"([^\"]*)\",([^,]*),1\\)\\)/range-to\\(end-point\\(string-range\\(\"([^\"]*)\",([^,]*),1\\)\\)\\)\\)"); |
---|
319 | Pattern rg1 = Pattern.compile("xpointer\\(start-point\\(string-range\\(\"([^\"]*)\",([^,]*),1\\)\\)\\)"); |
---|
320 | try { |
---|
321 | for (String xpointer : xpointers) { |
---|
322 | // String decoded = URLDecoder.decode(xpointer, "utf-8"); |
---|
323 | String decoded = xpointer; |
---|
324 | Matcher m = rg.matcher(decoded); |
---|
325 | if (m.find()) { |
---|
326 | JSONObject jo = new JSONObject(); |
---|
327 | jo.put("start", m.group(1)); |
---|
328 | jo.put("startOffset", m.group(2)); |
---|
329 | jo.put("end", m.group(3)); |
---|
330 | jo.put("endOffset", m.group(4)); |
---|
331 | ja.put(jo); |
---|
332 | } |
---|
333 | m = rg1.matcher(xpointer); |
---|
334 | if (m.find()) { |
---|
335 | JSONObject jo = new JSONObject(); |
---|
336 | jo.put("start", m.group(1)); |
---|
337 | jo.put("startOffset", m.group(2)); |
---|
338 | ja.put(jo); |
---|
339 | } |
---|
340 | } |
---|
341 | } catch (JSONException e) { |
---|
342 | logger.severe("Unable to transform to ranges! "+e); |
---|
343 | } |
---|
344 | return ja; |
---|
345 | } |
---|
346 | |
---|
347 | private JSONArray transformToShapes(List<String> fragments) { |
---|
348 | JSONArray ja = new JSONArray(); |
---|
349 | Pattern xywhPattern = Pattern.compile("xywh=(\\w*):([\\d\\.]+),([\\d\\.]+),([\\d\\.]+),([\\d\\.]+)"); |
---|
350 | Pattern wktPattern = Pattern.compile("wkt=(\\w+)\\(+([\\d\\.\\,\\ ]+)\\)+"); |
---|
351 | try { |
---|
352 | for (String fragment : fragments) { |
---|
353 | Matcher xywhMatch = xywhPattern.matcher(fragment); |
---|
354 | Matcher wktMatch = wktPattern.matcher(fragment); |
---|
355 | if (xywhMatch.find()) { |
---|
356 | // xywh rectangle fragment |
---|
357 | String units = xywhMatch.group(1); |
---|
358 | float x = getFloat(xywhMatch.group(2)); |
---|
359 | float y = getFloat(xywhMatch.group(3)); |
---|
360 | float width = getFloat(xywhMatch.group(4)); |
---|
361 | float height = getFloat(xywhMatch.group(5)); |
---|
362 | JSONObject shape = new JSONObject(); |
---|
363 | JSONObject geom = new JSONObject(); |
---|
364 | geom.put("units", units); |
---|
365 | geom.put("x", x); |
---|
366 | geom.put("y", y); |
---|
367 | if (width == 0 || height == 0) { |
---|
368 | shape.put("type", "point"); |
---|
369 | shape.put("geometry", geom); |
---|
370 | } else { |
---|
371 | shape.put("type", "rectangle"); |
---|
372 | geom.put("width", width); |
---|
373 | geom.put("height", height); |
---|
374 | shape.put("geometry", geom); |
---|
375 | } |
---|
376 | ja.put(shape); |
---|
377 | } else if (wktMatch.find()) { |
---|
378 | // wkt shape fragment |
---|
379 | String type = wktMatch.group(1); |
---|
380 | String coordString = wktMatch.group(2); |
---|
381 | JSONObject shape = new JSONObject(); |
---|
382 | JSONObject geom = new JSONObject(); |
---|
383 | shape.put("type", type.toLowerCase()); |
---|
384 | // TODO: add units/crs to fragment? |
---|
385 | geom.put("units", "fraction"); |
---|
386 | JSONArray coords = new JSONArray(); |
---|
387 | String[] coordPairs = coordString.split(", *"); |
---|
388 | for (String coordPairString : coordPairs) { |
---|
389 | String[] coordPair = coordPairString.split(" +"); |
---|
390 | coords.put(new JSONArray(coordPair)); |
---|
391 | } |
---|
392 | geom.put("coordinates", coords); |
---|
393 | shape.put("geometry", geom); |
---|
394 | ja.put(shape); |
---|
395 | } |
---|
396 | } |
---|
397 | } catch (JSONException e) { |
---|
398 | logger.severe("Unable to transform to shapes! "+e); |
---|
399 | } |
---|
400 | return ja; |
---|
401 | } |
---|
402 | |
---|
403 | protected String parseShape(JSONObject shape) throws JSONException { |
---|
404 | String fragment = null; |
---|
405 | String type = shape.getString("type"); |
---|
406 | JSONObject geom = shape.getJSONObject("geometry"); |
---|
407 | if (type.equalsIgnoreCase("point")) { |
---|
408 | // point shape |
---|
409 | String x = geom.getString("x"); |
---|
410 | String y = geom.getString("y"); |
---|
411 | fragment = String.format("xywh=fraction:%s,%s,0,0", x, y); |
---|
412 | } else if (type.equalsIgnoreCase("rectangle")) { |
---|
413 | // rectangle shape |
---|
414 | String x = geom.getString("x"); |
---|
415 | String y = geom.getString("y"); |
---|
416 | String width = geom.getString("width"); |
---|
417 | String height = geom.getString("height"); |
---|
418 | fragment = String.format("xywh=fraction:%s,%s,%s,%s", x, y, width, height); |
---|
419 | } else if (type.equalsIgnoreCase("polygon")) { |
---|
420 | // polygon shape |
---|
421 | JSONArray coordArray = geom.getJSONArray("coordinates"); |
---|
422 | StringBuilder coords = new StringBuilder(); |
---|
423 | int numCoords = coordArray.length(); |
---|
424 | for (int i = 0; i < numCoords; ++i) { |
---|
425 | JSONArray coordPair = coordArray.getJSONArray(i); |
---|
426 | coords.append(coordPair.getString(0)); |
---|
427 | coords.append(" "); |
---|
428 | coords.append(coordPair.getString(1)); |
---|
429 | if (i < numCoords-1) { |
---|
430 | coords.append(", "); |
---|
431 | } |
---|
432 | } |
---|
433 | // TODO: add units/crs to wkt |
---|
434 | // assume polygon with outer ring |
---|
435 | fragment = String.format("wkt=POLYGON((%s))", coords); |
---|
436 | } else if (type.equalsIgnoreCase("linestring")) { |
---|
437 | // linestring (polyline) shape |
---|
438 | JSONArray coordArray = geom.getJSONArray("coordinates"); |
---|
439 | StringBuilder coords = new StringBuilder(); |
---|
440 | int numCoords = coordArray.length(); |
---|
441 | for (int i = 0; i < numCoords; ++i) { |
---|
442 | JSONArray coordPair = coordArray.getJSONArray(i); |
---|
443 | coords.append(coordPair.getString(0)); |
---|
444 | coords.append(" "); |
---|
445 | coords.append(coordPair.getString(1)); |
---|
446 | if (i < numCoords-1) { |
---|
447 | coords.append(", "); |
---|
448 | } |
---|
449 | } |
---|
450 | // TODO: add units/crs to wkt |
---|
451 | fragment = String.format("wkt=LINESTRING(%s)", coords); |
---|
452 | } else { |
---|
453 | logger.severe("Unable to parse this shape: " + shape); |
---|
454 | } |
---|
455 | return fragment; |
---|
456 | } |
---|
457 | |
---|
458 | protected String parseArea(JSONObject area) throws JSONException { |
---|
459 | String x = area.getString("x"); |
---|
460 | String y = area.getString("y"); |
---|
461 | String width = "0"; |
---|
462 | String height = "0"; |
---|
463 | if (area.has("width")) { |
---|
464 | width = area.getString("width"); |
---|
465 | height = area.getString("height"); |
---|
466 | } |
---|
467 | String fragment = String.format("xywh=fraction:%s,%s,%s,%s", x, y, width, height); |
---|
468 | return fragment; |
---|
469 | } |
---|
470 | |
---|
471 | protected String parseRange(JSONObject range) throws JSONException { |
---|
472 | String start = range.getString("start"); |
---|
473 | String end = range.getString("end"); |
---|
474 | String startOffset = range.getString("startOffset"); |
---|
475 | String endOffset = range.getString("endOffset"); |
---|
476 | String fragment = String.format( |
---|
477 | "xpointer(start-point(string-range(\"%s\",%s,1))/range-to(end-point(string-range(\"%s\",%s,1))))", start, |
---|
478 | startOffset, end, endOffset); |
---|
479 | return fragment; |
---|
480 | } |
---|
481 | |
---|
482 | /** |
---|
483 | * Creates an Annotation object with data from JSON. |
---|
484 | * |
---|
485 | * uses the specification from the annotator project: {@link https |
---|
486 | * ://github.com/okfn/annotator/wiki/Annotation-format} |
---|
487 | * |
---|
488 | * The username will be transformed to an URI if not given already as URI, |
---|
489 | * if not it will set to the MPIWG namespace defined in |
---|
490 | * de.mpiwg.itgroup.annotationManager.Constants.NS |
---|
491 | * |
---|
492 | * @param jo |
---|
493 | * @return |
---|
494 | * @throws JSONException |
---|
495 | * @throws UnsupportedEncodingException |
---|
496 | */ |
---|
497 | public Annotation createAnnotation(JSONObject jo, Representation entity) throws JSONException, UnsupportedEncodingException { |
---|
498 | return updateAnnotation(new Annotation(), jo, entity); |
---|
499 | } |
---|
500 | |
---|
501 | /** |
---|
502 | * Updates an Annotation object with data from JSON. |
---|
503 | * |
---|
504 | * uses the specification from the annotator project: {@link https |
---|
505 | * ://github.com/okfn/annotator/wiki/Annotation-format} |
---|
506 | * |
---|
507 | * The username will be transformed to an URI if not given already as URI, |
---|
508 | * if not it will set to the MPIWG namespace defined in |
---|
509 | * de.mpiwg.itgroup.annotationManager.Constants.NS |
---|
510 | * |
---|
511 | * @param annot |
---|
512 | * @param jo |
---|
513 | * @return |
---|
514 | * @throws JSONException |
---|
515 | * @throws UnsupportedEncodingException |
---|
516 | */ |
---|
517 | public Annotation updateAnnotation(Annotation annot, JSONObject jo, Representation entity) throws JSONException, |
---|
518 | UnsupportedEncodingException { |
---|
519 | /* |
---|
520 | * target uri |
---|
521 | */ |
---|
522 | if (jo.has("uri")) { |
---|
523 | annot.setTarget(new Target(jo.getString("uri"))); |
---|
524 | } |
---|
525 | /* |
---|
526 | * resource uri |
---|
527 | */ |
---|
528 | if (jo.has("resource")) { |
---|
529 | annot.setResource(new Resource(jo.getString("resource"))); |
---|
530 | } |
---|
531 | /* |
---|
532 | * annotation text |
---|
533 | */ |
---|
534 | if (jo.has("text")) { |
---|
535 | annot.setBodyText(jo.getString("text")); |
---|
536 | } |
---|
537 | /* |
---|
538 | * annotation quote |
---|
539 | */ |
---|
540 | if (jo.has("quote")) { |
---|
541 | annot.setQuote(jo.getString("quote")); |
---|
542 | } |
---|
543 | /* |
---|
544 | * check authentication |
---|
545 | */ |
---|
546 | Person authUser = getUserFromAuthToken(entity); |
---|
547 | if (authUser == null) { |
---|
548 | /* |
---|
549 | * // try http auth User httpUser = getHttpAuthUser(entity); if |
---|
550 | * (httpUser == null) { |
---|
551 | */ |
---|
552 | setStatus(Status.CLIENT_ERROR_FORBIDDEN); |
---|
553 | return null; |
---|
554 | /* |
---|
555 | * } authUser = httpUser.getIdentifier(); |
---|
556 | */ |
---|
557 | } |
---|
558 | /* |
---|
559 | * get or create creator object |
---|
560 | */ |
---|
561 | Actor creator = annot.getCreator(); |
---|
562 | if (creator == null) { |
---|
563 | creator = new Person(); |
---|
564 | annot.setCreator(creator); |
---|
565 | } |
---|
566 | // username not required, if no username given authuser will be used |
---|
567 | String username = null; |
---|
568 | String userUri = creator.getUri(); |
---|
569 | if (jo.has("user")) { |
---|
570 | if (jo.get("user") instanceof String) { |
---|
571 | // user is just a String |
---|
572 | username = jo.getString("user"); |
---|
573 | creator.setId(username); |
---|
574 | // TODO: what if username and authUser are different? |
---|
575 | } else { |
---|
576 | // user is an object |
---|
577 | JSONObject user = jo.getJSONObject("user"); |
---|
578 | if (user.has("id")) { |
---|
579 | String id = user.getString("id"); |
---|
580 | creator.setId(id); |
---|
581 | username = id; |
---|
582 | } |
---|
583 | if (user.has("uri")) { |
---|
584 | userUri = user.getString("uri"); |
---|
585 | } |
---|
586 | } |
---|
587 | } |
---|
588 | if (username == null) { |
---|
589 | username = authUser.getName(); |
---|
590 | } |
---|
591 | // try to get full name |
---|
592 | if (creator.getName() == null && username != null) { |
---|
593 | BaseRestlet restServer = (BaseRestlet) getApplication(); |
---|
594 | String fullName = restServer.getFullNameForId(username); |
---|
595 | creator.setName(fullName); |
---|
596 | } |
---|
597 | // userUri should be a URI, if not it will set to the MPIWG namespace |
---|
598 | if (userUri == null) { |
---|
599 | if (username.startsWith("http")) { |
---|
600 | userUri = username; |
---|
601 | } else { |
---|
602 | userUri = BaseRestlet.PERSONS_URI_PREFIX + username; |
---|
603 | } |
---|
604 | } |
---|
605 | // TODO: should we overwrite the creator? |
---|
606 | if (creator.getUri() == null) { |
---|
607 | creator.setUri(userUri); |
---|
608 | } |
---|
609 | /* |
---|
610 | * creation date |
---|
611 | */ |
---|
612 | if (annot.getCreated() == null) { |
---|
613 | // new - set creation date |
---|
614 | SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'"); |
---|
615 | String ct = format.format(Calendar.getInstance().getTime()); |
---|
616 | annot.setCreated(ct); |
---|
617 | } else { |
---|
618 | /* |
---|
619 | * update date |
---|
620 | */ |
---|
621 | // not new - set last update date |
---|
622 | SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'"); |
---|
623 | String ct = format.format(Calendar.getInstance().getTime()); |
---|
624 | annot.setUpdated(ct); |
---|
625 | } |
---|
626 | |
---|
627 | /* |
---|
628 | * create fragment from the first range/area |
---|
629 | */ |
---|
630 | try { |
---|
631 | if (jo.has("ranges")) { |
---|
632 | JSONArray ranges = jo.getJSONArray("ranges"); |
---|
633 | if (ranges.length() > 0) { |
---|
634 | JSONObject range = ranges.getJSONObject(0); |
---|
635 | annot.setFragmentType(FragmentTypes.XPOINTER); |
---|
636 | String fragment = parseRange(range); |
---|
637 | annot.setTargetFragment(fragment); |
---|
638 | } |
---|
639 | } |
---|
640 | } catch (JSONException e) { |
---|
641 | logger.warning(e.toString()); |
---|
642 | } |
---|
643 | try { |
---|
644 | if (jo.has("shapes")) { |
---|
645 | JSONArray shapes = jo.getJSONArray("shapes"); |
---|
646 | if (shapes.length() > 0) { |
---|
647 | JSONObject shape = shapes.getJSONObject(0); |
---|
648 | String fragment = parseShape(shape); |
---|
649 | annot.setTargetFragment(fragment); |
---|
650 | if (fragment.startsWith("wkt=")) { |
---|
651 | annot.setFragmentType(FragmentTypes.WKT); |
---|
652 | } else { |
---|
653 | annot.setFragmentType(FragmentTypes.AREA); |
---|
654 | } |
---|
655 | } |
---|
656 | } |
---|
657 | } catch (JSONException e) { |
---|
658 | logger.warning(e.toString()); |
---|
659 | } |
---|
660 | // deprecated areas type |
---|
661 | try { |
---|
662 | if (jo.has("areas")) { |
---|
663 | JSONArray areas = jo.getJSONArray("areas"); |
---|
664 | if (areas.length() > 0) { |
---|
665 | JSONObject area = areas.getJSONObject(0); |
---|
666 | annot.setFragmentType(FragmentTypes.AREA); |
---|
667 | String fragment = parseArea(area); |
---|
668 | annot.setTargetFragment(fragment); |
---|
669 | } |
---|
670 | } |
---|
671 | } catch (JSONException e) { |
---|
672 | logger.warning(e.toString()); |
---|
673 | } |
---|
674 | // no fragment is an error |
---|
675 | if (annot.getFragmentType() == null || annot.getTargetFragment() == null) { |
---|
676 | throw new JSONException("Annotation has no valid target fragment!"); |
---|
677 | } |
---|
678 | |
---|
679 | /* |
---|
680 | * permissions |
---|
681 | */ |
---|
682 | if (jo.has("permissions")) { |
---|
683 | JSONObject permissions = jo.getJSONObject("permissions"); |
---|
684 | if (permissions.has("admin")) { |
---|
685 | JSONArray perms = permissions.getJSONArray("admin"); |
---|
686 | Actor actor = getActorFromPermissions(perms); |
---|
687 | annot.setAdminPermission(actor); |
---|
688 | } |
---|
689 | if (permissions.has("delete")) { |
---|
690 | JSONArray perms = permissions.getJSONArray("delete"); |
---|
691 | Actor actor = getActorFromPermissions(perms); |
---|
692 | annot.setDeletePermission(actor); |
---|
693 | } |
---|
694 | if (permissions.has("update")) { |
---|
695 | JSONArray perms = permissions.getJSONArray("update"); |
---|
696 | Actor actor = getActorFromPermissions(perms); |
---|
697 | annot.setUpdatePermission(actor); |
---|
698 | } |
---|
699 | if (permissions.has("read")) { |
---|
700 | JSONArray perms = permissions.getJSONArray("read"); |
---|
701 | Actor actor = getActorFromPermissions(perms); |
---|
702 | annot.setReadPermission(actor); |
---|
703 | } |
---|
704 | } |
---|
705 | |
---|
706 | /* |
---|
707 | * tags |
---|
708 | */ |
---|
709 | if (jo.has("tags")) { |
---|
710 | HashSet<String> tagset = new HashSet<String>(); |
---|
711 | JSONArray tags = jo.getJSONArray("tags"); |
---|
712 | for (int i = 0; i < tags.length(); ++i) { |
---|
713 | tagset.add(tags.getString(i)); |
---|
714 | } |
---|
715 | annot.setTags(tagset); |
---|
716 | } |
---|
717 | |
---|
718 | return annot; |
---|
719 | } |
---|
720 | |
---|
721 | @SuppressWarnings("unused") |
---|
722 | // i in for loop |
---|
723 | protected Actor getActorFromPermissions(JSONArray perms) throws JSONException { |
---|
724 | Actor actor = null; |
---|
725 | for (int i = 0; i < perms.length(); ++i) { |
---|
726 | String perm = perms.getString(i); |
---|
727 | if (perm.toLowerCase().startsWith("group:")) { |
---|
728 | String groupId = perm.substring(6); |
---|
729 | actor = new Group(groupId); |
---|
730 | } else { |
---|
731 | actor = new Person(perm); |
---|
732 | } |
---|
733 | // we just take the first one |
---|
734 | break; |
---|
735 | } |
---|
736 | return actor; |
---|
737 | } |
---|
738 | |
---|
739 | public static float getFloat(String s) { |
---|
740 | try { |
---|
741 | return Float.parseFloat(s); |
---|
742 | } catch (NumberFormatException e) { |
---|
743 | } |
---|
744 | return 0f; |
---|
745 | } |
---|
746 | |
---|
747 | public static int getInt(String s) { |
---|
748 | try { |
---|
749 | return Integer.parseInt(s); |
---|
750 | } catch (NumberFormatException e) { |
---|
751 | } |
---|
752 | return 0; |
---|
753 | } |
---|
754 | } |
---|