EventMap in HaXe

gistfile1.hx

package ;

/**
 * ...
 * @author Johannes Stein
 */
class EventMap
{
  private var map: Map<String, Array<Dynamic -> Void>>;
	
	public function new() {
		map = new Map<String, Array<Dynamic -> Void>>();
	}
	
	public function on(eventName: String, fn: Dynamic -> Void) {
		if (map.exists(eventName)) {
			var value = map.get(eventName);
			value.push(fn);
			map.set(eventName, value);
		} else {
			var arr = new Array<Dynamic -> Void>();
			arr.push(fn);
			map.set(eventName, arr);
		}
	}
	
	public function off(eventName: String) {
		if (map.exists(eventName)) {
			map.remove(eventName);
		}
	}
	
	public function trigger(eventName: String, ?args: Dynamic) {
		if (map.exists(eventName)) {
			var value = map.get(eventName);
			for (i in value) {
				i.bind(args)();
			}
		}
	}
	
	public function exists(eventName: String): Bool {
		return map.exists(eventName);
	}
}