Tim's big refactoring of the Geometry modules. Fixes #590. All tests pass in FF (except the PanZoomBar stuff, which wasn't touched by this patch) and IE.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@2931 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Geometry/Polygon.js

@@ -16,6 +16,14 @@ OpenLayers.Geometry.Polygon = OpenLayers.Class.create();
 OpenLayers.Geometry.Polygon.prototype =
     OpenLayers.Class.inherit(OpenLayers.Geometry.Collection, {
 
+    /**
+     * An array of class names representing the types of components that
+     * the collection can include.  A null value means the component types
+     * are not restricted.
+     * @type Array(String)
+     */
+    componentTypes: ["OpenLayers.Geometry.LinearRing"],
+
     /**
      * @constructor
      *
@@ -25,24 +33,6 @@ OpenLayers.Geometry.Polygon.prototype =
         OpenLayers.Geometry.Collection.prototype.initialize.apply(this, 
                                                                   arguments);
     },
-
-    /**
-     * adds a component to the Polygon, checking type
-     *
-     * @param {OpenLayers.Geometry.LinearRing} point to add
-     * @param {int} index Index into the array to insert the component
-     */
-    addComponent: function(component, index) {
-        if (!(component instanceof OpenLayers.Geometry.LinearRing)) {
-            var throwStr = "component should be an " +
-                           "OpenLayers.Geometry.LinearRing but is a " + 
-                           component.CLASS_NAME;
-            throw throwStr;
-                           
-        }
-        OpenLayers.Geometry.Collection.prototype.addComponent.apply(this, 
-                                                                    arguments);
-    },
     
     /** Calculated by subtracting the areas of the internal holes from the 
      *   area of the outer hole.