/src/com/google/maps/extras/arcgislink/GeometryService.as

 1/*
 2 * ArcGIS for Google Maps Flash API
 3 *
 4 * License http://www.apache.org/licenses/LICENSE-2.0
 5 */
 6 /**
 7 * @author nianwei at gmail dot com
 8 */ 
 9
10package com.google.maps.extras.arcgislink
11{
12  import flash.events.Event;
13  import flash.events.EventDispatcher;
14  import flash.events.IEventDispatcher;
15/**
16This class represent an  
17 * <a href="http://resources.esri.com/help/9.3/arcgisserver/apis/rest/geometryserver.html">Geometry</a>
18 *  service.
19 */
20  public class GeometryService implements IEventDispatcher
21  {
22    public var url:String;
23    public function GeometryService(url:String)
24    {
25      dispatcher_= new EventDispatcher(this);
26      this.url  = url;
27    }
28/**
29   * This resource projects an array of input geometries from an input spatial reference
30   * to an output spatial reference
31   * @param {ProjectParameters} params
32   * @param {Function} callback
33   */
34  public function project (params:*, callbackFn:Function=null, failedFn:Function=null):void{
35    if (!params) {
36      return;
37    }
38    params.f = params.f || 'json';
39    if (!ArcGISUtil.isString(params.geometries)) {
40      // problem: REST seems do not like esriGeometryEnvelope
41      var gt:String = ArcGISConstants.GEOMETRY_POINT;
42      var json:Array = [];
43      for (var i:int = 0, c:int = params.geometries.length; i < c; i++) {
44        var g:* = params.geometries[i];
45        if (i === 0) {
46          if (g.points) {
47            gt = ArcGISConstants.GEOMETRY_MULTIPOINT;
48          } else if (g.paths) {
49            gt = ArcGISConstants.GEOMETRY_POLYLINE;
50          } else if (g.rings) {
51            gt = ArcGISConstants.GEOMETRY_POLYGON;
52          }
53        }
54        json.push(ArcGISUtil.fromGeometryToJSON(g, false));
55      }
56      params.geometries = '{ geometryType:' + gt + ', geometries:[' + json.join(',') + ']}';
57    }
58    ArcGISUtil.restRequest(this.url + '/project', params, this, callbackFn, failedFn);
59  };
60    private var dispatcher_:EventDispatcher ;
61    public function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void{
62       
63        dispatcher_.addEventListener(type, listener, useCapture, priority);
64    }
65           
66    public function dispatchEvent(evt:Event):Boolean{
67        return dispatcher_.dispatchEvent(evt);
68    }
69    
70    public function hasEventListener(type:String):Boolean{
71        return dispatcher_.hasEventListener(type);
72    }
73    
74    public function removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void{
75        dispatcher_.removeEventListener(type, listener, useCapture);
76    }
77                   
78    public function willTrigger(type:String):Boolean {
79        return dispatcher_.willTrigger(type);
80    }
81    
82  }
83}