net/systemeD/halcyon/connection/Connection.as

   1 package net.systemeD.halcyon.connection {
   2
   3     import flash.net.*;
   4
   5     import flash.events.EventDispatcher;
   6     import flash.events.Event;
   7
   8         public class Connection extends EventDispatcher {
   9
  10         private static var CONNECTION_TYPE:String = "AMF";
  11         private static var connectionInstance:Connection = null;
  12
  13         protected static var policyURL:String = "http://127.0.0.1:3000/api/crossdomain.xml";
  14         protected static var apiBaseURL:String = "http://127.0.0.1:3000/api/0.6/";
  15
  16         public static function getConnection():Connection {
  17             if ( connectionInstance == null ) {
  18                 if ( CONNECTION_TYPE == "XML" )
  19                     connectionInstance = new XMLConnection();
  20                 else
  21                     connectionInstance = new AMFConnection();
  22             }
  23             return connectionInstance;
  24         }
  25
  26                 public function getEnvironment(responder:Responder):void {}
  27
  28         // connection events
  29         public static var NEW_NODE:String = "new_node";
  30         public static var NEW_WAY:String = "new_way";
  31         public static var NEW_RELATION:String = "new_relation";
  32         public static var NEW_POI:String = "new_poi";
  33
  34         // store the data we download
  35         private var negativeID:Number = -1;
  36         private var nodes:Object = {};
  37         private var ways:Object = {};
  38         private var relations:Object = {};
  39         private var pois:Array = [];
  40
  41         protected function get nextNegative():Number {
  42             return negativeID--;
  43         }
  44
  45         protected function setNode(node:Node):void {
  46             nodes[node.id] = node;
  47             dispatchEvent(new EntityEvent(NEW_NODE, node));
  48         }
  49
  50         protected function setWay(way:Way):void {
  51             ways[way.id] = way;
  52             dispatchEvent(new EntityEvent(NEW_WAY, way));
  53         }
  54
  55         protected function setRelation(relation:Relation):void {
  56             relations[relation.id] = relation;
  57             dispatchEvent(new EntityEvent(NEW_RELATION, relation));
  58         }
  59
  60         protected function registerPOI(node:Node):void {
  61             if ( pois.indexOf(node) < 0 ) {
  62                 pois.push(node);
  63                 dispatchEvent(new EntityEvent(NEW_POI, node));
  64             }
  65         }
  66
  67         protected function unregisterPOI(node:Node):void {
  68             var index:uint = pois.indexOf(node)
  69             if ( index >= 0 ) {
  70                 pois.splice(index,1);
  71             }
  72         }
  73
  74         public function getNode(id:Number):Node {
  75             return nodes[id];
  76         }
  77
  78         public function getWay(id:Number):Way {
  79             return ways[id];
  80         }
  81
  82         public function getRelation(id:Number):Relation {
  83             return relations[id];
  84         }
  85
  86         public function createNode(tags:Object, lat:Number, lon:Number):Node {
  87             var node:Node = new Node(nextNegative, 0, tags, lat, lon);
  88             setNode(node);
  89             return node;
  90         }
  91
  92         public function createWay(tags:Object, nodes:Array):Way {
  93             var way:Way = new Way(nextNegative, 0, tags, nodes.concat());
  94             setWay(way);
  95             return way;
  96         }
  97
  98         public function createRelation(tags:Object, members:Array):Relation {
  99             var relation:Relation = new Relation(nextNegative, 0, tags, members.concat());
 100             setRelation(relation);
 101             return relation;
 102         }
 103
 104         public function getAllNodeIDs():Array {
 105             var list:Array = [];
 106             for each (var node:Node in nodes)
 107                 list.push(node.id);
 108             return list;
 109         }
 110
 111         public function getAllWayIDs():Array {
 112             var list:Array = [];
 113             for each (var way:Way in ways)
 114                 list.push(way.id);
 115             return list;
 116         }
 117
 118         public function getAllRelationIDs():Array {
 119             var list:Array = [];
 120             for each (var relation:Relation in relations)
 121                 list.push(relation.id);
 122             return list;
 123         }
 124
 125         // these are functions that the Connection implementation is expected to
 126         // provide. This class has some generic helpers for the implementation.
 127                 public function loadBbox(left:Number, right:Number,
 128                                                                 top:Number, bottom:Number):void {
 129             }
 130     }
 131
 132 }
 133
 134