Cairngorm Code

package sample3
{
    import flash.events.EventDispatcher;

    public class Sample3Model extends EventDispatcher
    {
        private var _lastname:String;

        private var _firstname:String;

        [Bindable]
        public var validatorGroup:Sample3ValidatorGroup = new Sample3ValidatorGroup();

        public function Sample3Model()
        {
            validatorGroup.model = this;
            validatorGroup.initialized(this, "sample3Model");
            validatorGroup.validate(true);
        }

        public function set firstname(value:String):void
        {
            _firstname = value;

            dispatchEvent(new Event("firstnameChanged"));
        }

        [Bindable(event="firstnameChanged")]
        public function get firstname():String
        {
            return _firstname;
        }

        public function set lastname(value:String):void
        {
            _lastname = value;
            dispatchEvent(new Event("lastnameChanged"));
        }

        [Bindable(event="lastnameChanged")]
        public function get lastname():String
        {
            return _lastname;
        }

        public function get isValid():Boolean
        {
            return validatorGroup.isValid;
        }
		
		public function validate() : void
		{
			validatorGroup.validate();
		}

    }
}