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

/*

 * ArcGIS for Google Maps Flash API

 *

 * License http://www.apache.org/licenses/LICENSE-2.0

 */

 /**

 * @author nianwei at gmail dot com

 */ 



package com.google.maps.extras.arcgislink

{

  import flash.events.Event;

  import flash.events.EventDispatcher;

  import flash.events.IEventDispatcher;

/**

This class represent an  

 * <a href="http://resources.esri.com/help/9.3/arcgisserver/apis/rest/geometryserver.html">Geometry</a>

 *  service.

 */

  public class GeometryService implements IEventDispatcher

  {

    public var url:String;

    public function GeometryService(url:String)

    {

      dispatcher_= new EventDispatcher(this);

      this.url  = url;

    }

/**

   * This resource projects an array of input geometries from an input spatial reference

   * to an output spatial reference

   * @param {ProjectParameters} params

   * @param {Function} callback

   */

  public function project (params:*, callbackFn:Function=null, failedFn:Function=null):void{

    if (!params) {

      return;

    }

    params.f = params.f || 'json';

    if (!ArcGISUtil.isString(params.geometries)) {

      // problem: REST seems do not like esriGeometryEnvelope

      var gt:String = ArcGISConstants.GEOMETRY_POINT;

      var json:Array = [];

      for (var i:int = 0, c:int = params.geometries.length; i < c; i++) {

        var g:* = params.geometries[i];

        if (i === 0) {

          if (g.points) {

            gt = ArcGISConstants.GEOMETRY_MULTIPOINT;

          } else if (g.paths) {

            gt = ArcGISConstants.GEOMETRY_POLYLINE;

          } else if (g.rings) {

            gt = ArcGISConstants.GEOMETRY_POLYGON;

          }

        }

        json.push(ArcGISUtil.fromGeometryToJSON(g, false));

      }

      params.geometries = '{ geometryType:' + gt + ', geometries:[' + json.join(',') + ']}';

    }

    ArcGISUtil.restRequest(this.url + '/project', params, this, callbackFn, failedFn);

  };

    private var dispatcher_:EventDispatcher ;

    public function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void{

       

        dispatcher_.addEventListener(type, listener, useCapture, priority);

    }

           

    public function dispatchEvent(evt:Event):Boolean{

        return dispatcher_.dispatchEvent(evt);

    }

    

    public function hasEventListener(type:String):Boolean{

        return dispatcher_.hasEventListener(type);

    }

    

    public function removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void{

        dispatcher_.removeEventListener(type, listener, useCapture);

    }

                   

    public function willTrigger(type:String):Boolean {

        return dispatcher_.willTrigger(type);

    }

    

  }

}