net/systemeD/halcyon/connection/Connection.as

   1 package net.systemeD.halcyon.connection {
   2
   3     import flash.events.Event;
   4     import flash.events.EventDispatcher;
   5     import flash.net.*;
   6
   7     import net.systemeD.halcyon.AttentionEvent;
   8     import net.systemeD.halcyon.MapEvent;
   9     import net.systemeD.halcyon.connection.actions.*;
  10     import net.systemeD.halcyon.Globals;
  11
  12         public class Connection extends EventDispatcher {
  13
  14                 public var name:String;
  15                 public var statusFetcher:StatusFetcher;
  16         protected var apiBaseURL:String;
  17         protected var policyURL:String;
  18         protected var params:Object;
  19
  20                 public function Connection(cname:String,api:String,policy:String,initparams:Object=null) {
  21                         initparams = (initparams!=null ? initparams:{});
  22                         name=cname;
  23                         apiBaseURL=api;
  24                         policyURL=policy;
  25                         params=initparams;
  26                 }
  27
  28         public function getParam(name:String, defaultValue:String):String {
  29                         if (params[name]) return params[name];
  30                         if (Globals.vars.flashvars[name]) return Globals.vars.flashvars[name];  // REFACTOR - given the profusion of connections, should this be removed?
  31                         return defaultValue;
  32         }
  33
  34         public function get apiBase():String {
  35             return apiBaseURL;
  36         }
  37
  38         public function get serverName():String {
  39             return getParam("serverName", "Localhost");
  40         }
  41
  42                 public function getEnvironment(responder:Responder):void {}
  43
  44         // connection events
  45         public static var LOAD_STARTED:String = "load_started";
  46         public static var LOAD_COMPLETED:String = "load_completed";
  47         public static var SAVE_STARTED:String = "save_started";
  48         public static var SAVE_COMPLETED:String = "save_completed";
  49         public static var DATA_DIRTY:String = "data_dirty";
  50         public static var DATA_CLEAN:String = "data_clean";
  51         public static var NEW_CHANGESET:String = "new_changeset";
  52         public static var NEW_CHANGESET_ERROR:String = "new_changeset_error";
  53         public static var NEW_NODE:String = "new_node";
  54         public static var NEW_WAY:String = "new_way";
  55         public static var NEW_RELATION:String = "new_relation";
  56         public static var NEW_POI:String = "new_poi";
  57         public static var NEW_MARKER:String = "new_marker";
  58         public static var NODE_RENUMBERED:String = "node_renumbered";
  59         public static var WAY_RENUMBERED:String = "way_renumbered";
  60         public static var RELATION_RENUMBERED:String = "relation_renumbered";
  61         public static var TAG_CHANGED:String = "tag_changed";
  62         public static var STATUS_CHANGED:String = "status_changed";
  63         public static var NODE_MOVED:String = "node_moved";
  64         public static var NODE_ALTERED:String = "node_altered";
  65         public static var WAY_NODE_ADDED:String = "way_node_added";
  66         public static var WAY_NODE_REMOVED:String = "way_node_removed";
  67         public static var WAY_REORDERED:String = "way_reordered";
  68         public static var ENTITY_DRAGGED:String = "entity_dragged";
  69                 public static var NODE_DELETED:String = "node_deleted";
  70                 public static var WAY_DELETED:String = "way_deleted";
  71                 public static var RELATION_DELETED:String = "relation_deleted";
  72                 public static var RELATION_MEMBER_ADDED:String = "relation_member_added";
  73                 public static var RELATION_MEMBER_REMOVED:String = "relation_member_deleted";
  74                 public static var ADDED_TO_RELATION:String = "added_to_relation";
  75                 public static var REMOVED_FROM_RELATION:String = "removed_from_relation";
  76                 public static var SUSPEND_REDRAW:String = "suspend_redraw";
  77                 public static var RESUME_REDRAW:String = "resume_redraw";
  78         public static var TRACES_LOADED:String = "traces_loaded";
  79
  80         // store the data we download
  81         private var negativeID:Number = -1;
  82         private var nodes:Object = {};
  83         private var ways:Object = {};
  84         private var relations:Object = {};
  85         private var markers:Object = {};
  86         private var pois:Array = [];
  87         private var changeset:Changeset = null;
  88                 private var changesetUpdated:Number;
  89                 private var modified:Boolean = false;
  90                 public var nodecount:int=0;
  91                 public var waycount:int=0;
  92                 public var relationcount:int=0;
  93         private var traces:Array = [];
  94         private var nodePositions:Object = {};
  95         protected var traces_loaded:Boolean = false;
  96                 private var loadedBboxes:Array = [];
  97
  98                 /** maximum number of ways to keep in memory before purging */
  99                 protected const MAXWAYS:uint=3000;
 100
 101         protected function get nextNegative():Number {
 102             return negativeID--;
 103         }
 104
 105         protected function setNode(node:Node, queue:Boolean):void {
 106                         if (!nodes[node.id]) { nodecount++; }
 107             nodes[node.id] = node;
 108             addDupe(node);
 109             if (node.loaded) { sendEvent(new EntityEvent(NEW_NODE, node),queue); }
 110         }
 111
 112         protected function setWay(way:Way, queue:Boolean):void {
 113                         if (!ways[way.id] && way.loaded) { waycount++; }
 114             ways[way.id] = way;
 115             if (way.loaded) { sendEvent(new EntityEvent(NEW_WAY, way),queue); }
 116         }
 117
 118         protected function setRelation(relation:Relation, queue:Boolean):void {
 119                         if (!relations[relation.id]) { relationcount++; }
 120             relations[relation.id] = relation;
 121             if (relation.loaded) { sendEvent(new EntityEvent(NEW_RELATION, relation),queue); }
 122         }
 123
 124                 protected function setOrUpdateNode(newNode:Node, queue:Boolean):void {
 125                 if (nodes[newNode.id]) {
 126                                 var wasDeleted:Boolean=nodes[newNode.id].isDeleted();
 127                                 nodes[newNode.id].update(newNode.version, newNode.getTagsHash(), true, newNode.parentsLoaded, newNode.lat, newNode.lon, newNode.uid, newNode.timestamp);
 128                                 if (wasDeleted) sendEvent(new EntityEvent(NEW_NODE, nodes[newNode.id]), false);
 129                         } else {
 130                                 setNode(newNode, queue);
 131                         }
 132                 }
 133
 134                 protected function renumberNode(oldID:Number, newID:Number, version:uint):void {
 135                         var node:Node=nodes[oldID];
 136                         if (oldID!=newID) { removeDupe(node); }
 137                         node.renumber(newID, version);
 138                         if (oldID==newID) return;                                       // if only a version change, return
 139                         nodes[newID]=node;
 140                         addDupe(node);
 141                         if (node.loaded) { sendEvent(new EntityRenumberedEvent(NODE_RENUMBERED, node, oldID),false); }
 142                         delete nodes[oldID];
 143                 }
 144
 145                 protected function renumberWay(oldID:Number, newID:Number, version:uint):void {
 146                         var way:Way=ways[oldID];
 147                         way.renumber(newID, version);
 148                         if (oldID==newID) return;
 149                         ways[newID]=way;
 150                         if (way.loaded) { sendEvent(new EntityRenumberedEvent(WAY_RENUMBERED, way, oldID),false); }
 151                         delete ways[oldID];
 152                 }
 153
 154                 protected function renumberRelation(oldID:Number, newID:Number, version:uint):void {
 155                         var relation:Relation=relations[oldID];
 156                         relation.renumber(newID, version);
 157                         if (oldID==newID) return;
 158                         relations[newID] = relation;
 159                         if (relation.loaded) { sendEvent(new EntityRenumberedEvent(RELATION_RENUMBERED, relation, oldID),false); }
 160                         delete relations[oldID];
 161                 }
 162
 163
 164                 public function sendEvent(e:*,queue:Boolean):void {
 165                         // queue is only used for AMFConnection
 166                         dispatchEvent(e);
 167                 }
 168
 169         public function registerPOI(node:Node):void {
 170             if ( pois.indexOf(node) < 0 ) {
 171                 pois.push(node);
 172                 sendEvent(new EntityEvent(NEW_POI, node),false);
 173             }
 174         }
 175
 176         public function unregisterPOI(node:Node):void {
 177             var index:uint = pois.indexOf(node);
 178             if ( index >= 0 ) {
 179                 pois.splice(index,1);
 180             }
 181         }
 182
 183         public function getNode(id:Number):Node {
 184             return nodes[id];
 185         }
 186
 187         public function getWay(id:Number):Way {
 188             return ways[id];
 189         }
 190
 191         public function getRelation(id:Number):Relation {
 192             return relations[id];
 193         }
 194
 195         public function getMarker(id:Number):Marker {
 196             return markers[id];
 197         }
 198
 199                 protected function findEntity(type:String, id:*):Entity {
 200                         var i:Number=Number(id);
 201                         switch (type.toLowerCase()) {
 202                                 case 'node':     return getNode(id);
 203                                 case 'way':      return getWay(id);
 204                                 case 'relation': return getRelation(id);
 205                                 default:         return null;
 206                         }
 207                 }
 208
 209                 // Remove data from Connection
 210                 // These functions are used only internally to stop redundant data hanging around
 211                 // (either because it's been deleted on the server, or because we have panned away
 212                 //  and need to reduce memory usage)
 213
 214                 protected function killNode(id:Number):void {
 215                         if (!nodes[id]) return;
 216             nodes[id].dispatchEvent(new EntityEvent(Connection.NODE_DELETED, nodes[id]));
 217                         removeDupe(nodes[id]);
 218                         if (nodes[id].parentRelations.length>0) {
 219                                 nodes[id].nullify();
 220                         } else {
 221                                 delete nodes[id];
 222                         }
 223                         nodecount--;
 224                 }
 225
 226                 protected function killWay(id:Number):void {
 227                         if (!ways[id]) return;
 228             ways[id].dispatchEvent(new EntityEvent(Connection.WAY_DELETED, ways[id]));
 229                         if (ways[id].parentRelations.length>0) {
 230                                 ways[id].nullify();
 231                         } else {
 232                                 delete ways[id];
 233                         }
 234                         waycount--;
 235                 }
 236
 237                 protected function killRelation(id:Number):void {
 238                         if (!relations[id]) return;
 239             relations[id].dispatchEvent(new EntityEvent(Connection.RELATION_DELETED, relations[id]));
 240                         if (relations[id].parentRelations.length>0) {
 241                                 relations[id].nullify();
 242                         } else {
 243                                 delete relations[id];
 244                         }
 245                         relationcount--;
 246                 }
 247
 248                 protected function killWayWithNodes(id:Number):void {
 249                         var way:Way=ways[id];
 250                         var node:Node;
 251                         for (var i:uint=0; i<way.length; i++) {
 252                                 node=way.getNode(i);
 253                                 if (node.isDirty) { continue; }
 254                                 if (node.parentWays.length>1) {
 255                                         node.removeParent(way);
 256                                 } else {
 257                                         killNode(node.id);
 258                                 }
 259                         }
 260                         killWay(id);
 261                 }
 262
 263                 protected function killEntity(entity:Entity):void {
 264                         if (entity is Way) { killWay(entity.id); }
 265                         else if (entity is Node) { killNode(entity.id); }
 266                         else if (entity is Relation) { killRelation(entity.id); }
 267                 }
 268
 269         public function createNode(tags:Object, lat:Number, lon:Number, performCreate:Function):Node {
 270             var node:Node = new Node(this, nextNegative, 0, tags, true, lat, lon);
 271             performCreate(new CreateEntityAction(node, setNode));
 272             return node;
 273         }
 274
 275         public function createWay(tags:Object, nodes:Array, performCreate:Function):Way {
 276             var way:Way = new Way(this, nextNegative, 0, tags, true, nodes.concat());
 277             performCreate(new CreateEntityAction(way, setWay));
 278             return way;
 279         }
 280
 281         public function createRelation(tags:Object, members:Array, performCreate:Function):Relation {
 282             var relation:Relation = new Relation(this, nextNegative, 0, tags, true, members.concat());
 283             performCreate(new CreateEntityAction(relation, setRelation));
 284             return relation;
 285         }
 286
 287         /** Create a new marker. This can't be done as part of a Composite Action. */
 288         // REFACTOR  This needs renaming and/or refactoring to behave more similarly to n/w/r
 289         public function createMarker(tags:Object,lat:Number,lon:Number,id:Number=NaN):Marker {
 290             if (!id) {
 291               id = negativeID;
 292               negativeID--;
 293             }
 294             var marker:Marker = markers[id];
 295             if (marker == null) {
 296               trace("new marker");
 297               marker = new Marker(this, id, 0, tags, true, lat, lon);
 298               markers[id]=marker;
 299               sendEvent(new EntityEvent(NEW_MARKER, marker),false);
 300             }
 301             return marker;
 302         }
 303
 304         public function getAllNodeIDs():Array {
 305             var list:Array = [];
 306             for each (var node:Node in nodes)
 307                 list.push(node.id);
 308             return list;
 309         }
 310
 311         public function getAllWayIDs():Array {
 312             var list:Array = [];
 313             for each (var way:Way in ways)
 314                 list.push(way.id);
 315             return list;
 316         }
 317
 318         public function getAllRelationIDs():Array {
 319             var list:Array = [];
 320             for each (var relation:Relation in relations)
 321                 list.push(relation.id);
 322             return list;
 323         }
 324
 325                 public function getAllLoadedEntities():Array {
 326                         var list:Array = []; var entity:Entity;
 327                         for each (entity in relations) { if (entity.loaded && !entity.deleted) list.push(entity); }
 328                         for each (entity in ways     ) { if (entity.loaded && !entity.deleted) list.push(entity); }
 329                         for each (entity in nodes    ) { if (entity.loaded && !entity.deleted) list.push(entity); }
 330                         return list;
 331                 }
 332
 333         /** Returns all available relations that match all of {k1: [v1,v2,...], k2: [v1...] ...}
 334         * where p1 is an array [v1, v2, v3...] */
 335         public function getMatchingRelationIDs(match:Object):Array {
 336             var list:Array = [];
 337             for each (var relation:Relation in relations) {
 338                 var ok: Boolean = true;
 339                                 if (relation.deleted) { continue; }
 340                                 for (var k:String in match) {
 341                                         var v:String = relation.getTagsHash()[k];
 342                                         if (!v || match[k].indexOf(v) < 0) {
 343                                            ok = false; break;
 344                                         }
 345                                 }
 346                                 if (ok) { list.push(relation.id); }
 347                         }
 348             return list;
 349         }
 350
 351                 public function getObjectsByBbox(left:Number, right:Number, top:Number, bottom:Number):Object {
 352                         var o:Object = { poisInside: [], poisOutside: [], waysInside: [], waysOutside: [],
 353                               markersInside: [], markersOutside: [] };
 354                         for each (var way:Way in ways) {
 355                                 if (way.within(left,right,top,bottom)) { o.waysInside.push(way); }
 356                                                                   else { o.waysOutside.push(way); }
 357                         }
 358                         for each (var poi:Node in pois) {
 359                                 if (poi.within(left,right,top,bottom)) { o.poisInside.push(poi); }
 360                                                                   else { o.poisOutside.push(poi); }
 361                         }
 362             for each (var marker:Marker in markers) {
 363                 if (marker.within(left,right,top,bottom)) { o.markersInside.push(marker); }
 364                                                      else { o.markersOutside.push(marker); }
 365             }
 366                         return o;
 367                 }
 368
 369                 public function purgeOutside(left:Number, right:Number, top:Number, bottom:Number):void {
 370                         for each (var way:Way in ways) {
 371                                 if (!way.within(left,right,top,bottom) && !way.isDirty && !way.locked && !way.hasLockedNodes()) {
 372                                         killWayWithNodes(way.id);
 373                                 }
 374                         }
 375                         for each (var poi:Node in pois) {
 376                                 if (!poi.within(left,right,top,bottom) && !poi.isDirty && !poi.locked) {
 377                                         killNode(poi.id);
 378                                 }
 379                         }
 380                         // ** should purge relations too, if none of their members are on-screen
 381                 }
 382
 383                 public function markDirty():void {
 384             if (!modified) { dispatchEvent(new Event(DATA_DIRTY)); }
 385                         modified=true;
 386                 }
 387                 public function markClean():void {
 388             if (modified) { dispatchEvent(new Event(DATA_CLEAN)); }
 389                         modified=false;
 390                 }
 391                 public function get isDirty():Boolean {
 392                         return modified;
 393                 }
 394
 395                 // Keep track of the bboxes we've loaded
 396
 397                 /** Has the data within this bbox already been loaded? */
 398                 protected function isBboxLoaded(left:Number,right:Number,top:Number,bottom:Number):Boolean {
 399                         var l:Number,r:Number,t:Number,b:Number;
 400                         for each (var box:Array in loadedBboxes) {
 401                                 l=box[0]; r=box[1]; t=box[2]; b=box[3];
 402                                 if (left>=l && left<=r && right>=l && right<=r && top>=b && top<=t && bottom>=b && bottom<=t) {
 403                                         return true;
 404                                 }
 405                         }
 406                         return false;
 407                 }
 408                 /** Mark that bbox is loaded */
 409                 protected function markBboxLoaded(left:Number,right:Number,top:Number,bottom:Number):void {
 410                         if (isBboxLoaded(left,right,top,bottom)) return;
 411                         loadedBboxes.push([left,right,top,bottom]);
 412                 }
 413                 /** Purge all data if number of ways exceeds limit */
 414                 public function purgeIfFull(left:Number,right:Number,top:Number,bottom:Number):void {
 415                         if (waycount<=MAXWAYS) return;
 416                         purgeOutside(left,right,top,bottom);
 417                         loadedBboxes=[[left,right,top,bottom]];
 418                 }
 419
 420                 // Changeset tracking
 421
 422         protected function setActiveChangeset(changeset:Changeset):void {
 423             this.changeset = changeset;
 424                         changesetUpdated = new Date().getTime();
 425             sendEvent(new EntityEvent(NEW_CHANGESET, changeset),false);
 426         }
 427
 428                 protected function freshenActiveChangeset():void {
 429                         changesetUpdated = new Date().getTime();
 430                 }
 431
 432                 protected function closeActiveChangeset():void {
 433                         changeset = null;
 434                 }
 435
 436         public function getActiveChangeset():Changeset {
 437                         if (changeset && (new Date().getTime()) > (changesetUpdated+58*60*1000)) {
 438                                 closeActiveChangeset();
 439                         }
 440             return changeset;
 441         }
 442
 443         protected function addTrace(t:Object):void {
 444             traces.push(t);
 445         }
 446
 447         protected function clearTraces():void {
 448             traces = [];
 449         }
 450
 451         public function getTraces():Array {
 452             return traces;
 453         }
 454
 455         public function addDupe(node:Node):void {
 456             if (getNode(node.id) != node) { return; } // make sure it's on this connection
 457             var a:String = node.lat+","+node.lon;
 458             if(!nodePositions[a]) {
 459               nodePositions[a] = [];
 460             }
 461             nodePositions[a].push(node);
 462             if (nodePositions[a].length > 1) { // don't redraw if it's the only node in town
 463               for each (var n:Node in nodePositions[a]) {
 464                 n.dispatchEvent(new Event(Connection.NODE_ALTERED));
 465               }
 466             }
 467         }
 468
 469         public function removeDupe(node:Node):void {
 470             if (getNode(node.id) != node) { return; } // make sure it's on this connection
 471             var a:String = node.lat+","+node.lon;
 472             var redraw:Boolean=node.isDupe();
 473             var dupes:Array = [];
 474             for each (var dupe:Node in nodePositions[a]) {
 475               if (dupe!=node) { dupes.push(dupe); }
 476             }
 477             nodePositions[a] = dupes;
 478             for each (var n:Node in nodePositions[a]) { // redraw any nodes remaining
 479               n.dispatchEvent(new Event(Connection.NODE_ALTERED));
 480             }
 481             if (redraw) { node.dispatchEvent(new Event(Connection.NODE_ALTERED)); } //redraw the one being moved
 482         }
 483
 484         public function nodesAtPosition(lat:Number, lon:Number):uint {
 485             if (nodePositions[lat+","+lon]) {
 486               return nodePositions[lat+","+lon].length;
 487             }
 488             return 0;
 489         }
 490
 491         public function getNodesAtPosition(lat:Number, lon:Number):Array {
 492             if (nodePositions[lat+","+lon]) {
 493               return nodePositions[lat+","+lon];
 494             }
 495             return [];
 496         }
 497
 498                 public function identicalNode(node:Node):Node {
 499                         for each (var dupe:Node in nodePositions[node.lat+","+node.lon]) {
 500                                 if (node.lat==dupe.lat && node.lon==dupe.lon && node.sameTags(dupe)) return dupe;
 501                         }
 502                         return null;
 503                 }
 504
 505                 // Error-handling
 506
 507                 protected function throwConflictError(entity:Entity,serverVersion:uint,message:String):void {
 508                         dispatchEvent(new MapEvent(MapEvent.ERROR, {
 509                                 message: "An item you edited has been changed by another mapper. Download their version and try again? (The server said: "+message+")",
 510                                 yes: function():void { revertBeforeUpload(entity) },
 511                                 no: cancelUpload }));
 512                         // ** FIXME: this should also offer the choice of 'overwrite?'
 513                 }
 514                 protected function throwAlreadyDeletedError(entity:Entity,message:String):void {
 515                         dispatchEvent(new MapEvent(MapEvent.ERROR, {
 516                                 message: "You tried to delete something that's already been deleted. Forget it and try again? (The server said: "+message+")",
 517                                 yes: function():void { deleteBeforeUpload(entity) },
 518                                 no: cancelUpload }));
 519                 }
 520                 protected function throwInUseError(entity:Entity,message:String):void {
 521                         dispatchEvent(new MapEvent(MapEvent.ERROR, {
 522                                 message: "You tried to delete something that's since been used elsewhere. Restore it and try again? (The server said: "+message+")",
 523                                 yes: function():void { revertBeforeUpload(entity) },
 524                                 no: cancelUpload }));
 525                 }
 526                 protected function throwEntityError(entity:Entity,message:String):void {
 527                         dispatchEvent(new MapEvent(MapEvent.ERROR, {
 528                                 message: "There is a problem with your changes which needs to be fixed before you can save: "+message+". Click 'OK' to see the offending item.",
 529                                 ok: function():void { goToEntity(entity) } }));
 530                 }
 531                 protected function throwChangesetError(message:String):void {
 532                         dispatchEvent(new MapEvent(MapEvent.ERROR, {
 533                                 message: "The changeset in which you're saving changes is no longer valid. Start a new one and retry? (The server said: "+message+")",
 534                                 yes: retryUploadWithNewChangeset,
 535                                 no: cancelUpload }));
 536                 }
 537                 protected function throwBugError(message:String):void {
 538                         dispatchEvent(new MapEvent(MapEvent.ERROR, {
 539                                 message: "An unexpected error occurred, probably due to a bug in Potlatch 2. Do you want to retry? (The server said: "+message+")",
 540                                 yes: retryUpload,
 541                                 no: cancelUpload }));
 542                 }
 543                 protected function throwServerError(message:String):void {
 544                         dispatchEvent(new MapEvent(MapEvent.ERROR, {
 545                                 message: "A server error occurred. Do you want to retry? (The server said: "+message+")",
 546                                 yes: retryUpload,
 547                                 no: cancelUpload }));
 548                 }
 549
 550                 public function retryUpload(e:Event=null):void {
 551                         removeEventListener(LOAD_COMPLETED,retryUpload);
 552                         uploadChanges();
 553                 }
 554                 public function cancelUpload():void {
 555                         return;
 556                 }
 557                 public function retryUploadWithNewChangeset():void {
 558                         // ** FIXME: we need to move the create-changeset-then-upload logic out of SaveDialog
 559                 }
 560                 public function goToEntity(entity:Entity):void {
 561                         dispatchEvent(new AttentionEvent(AttentionEvent.ATTENTION, entity));
 562                 }
 563                 public function revertBeforeUpload(entity:Entity):void {
 564                         addEventListener(LOAD_COMPLETED,retryUpload);
 565                         loadEntity(entity);
 566                 }
 567                 public function deleteBeforeUpload(entity:Entity):void {
 568             var a:CompositeUndoableAction = new CompositeUndoableAction("Delete refs");
 569             entity.remove(a.push);
 570             a.doAction();
 571                         killEntity(entity);
 572                         uploadChanges();
 573                 }
 574
 575         // these are functions that the Connection implementation is expected to
 576         // provide. This class has some generic helpers for the implementation.
 577                 public function loadBbox(left:Number, right:Number,
 578                                                                 top:Number, bottom:Number):void {
 579             }
 580             public function loadEntityByID(type:String, id:Number):void {}
 581             public function setAuthToken(id:Object):void {}
 582         public function setAccessToken(key:String, secret:String):void {}
 583             public function createChangeset(tags:Object):void {}
 584                 public function closeChangeset():void {}
 585         public function uploadChanges():* {}
 586         public function fetchUserTraces(refresh:Boolean=false):void {}
 587         public function fetchTrace(id:Number, callback:Function):void {}
 588         public function hasAccessToken():Boolean { return false; }
 589
 590                 public function loadEntity(entity:Entity):void {
 591                         loadEntityByID(entity.getType(),entity.id);
 592                 }
 593
 594     }
 595
 596 }
 597