package validators
{
	import data.DataSource;
	
	import mx.validators.ValidationResult;
	import mx.validators.Validator;

	public class UniqueFieldValidator extends Validator
	{
		public var dataSource:DataSource = null;
		public var uniqueWarning:String = "notUnique";
		public var type:String = "";
		public var newElement:Boolean = false;
		
		public function UniqueFieldValidator()
		{
			super();
		}
		
		protected override function doValidation(value:Object):Array {
			var results:Array = super.doValidation(value);
			
			if(results.length > 0) {
				return results;
			}
			
			results = [];
			
			if(dataSource != null) {
				if(!dataSource.isUnique(type, value.toString(), newElement)) {
					results.push(new ValidationResult(true, null, "notUnique",
						uniqueWarning));
				}				
			}
						
			return results;
		}
	}
}