HaxeFoundation.haxe/std/js/_std/haxe/ds/ObjectMap.hx

/*
 * Copyright (C)2005-2013 Haxe Foundation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

package haxe.ds;

@:coreApi
abstract ObjectMap({}) < K: { }, V > {
	
	static var count = 0;
	
	static inline function assignId(obj: { } ) {
		return untyped obj.__id__ = ++count;
	}
	
	static inline function getId(obj: { } ) {
		return untyped obj.__id__;
	}
	
	public inline function new(weakKeys:Bool = false) {
		this = { };
		untyped this.__keys__ = { };
	}
	
	public function set(key:K, value:V) untyped {
		var id = key.__id__ != null ? key.__id__ : assignId(key);
		this[id] = value;
		this.__keys__[id] = key;
	}
	
	public inline function get(key:K) {
		return untyped this[getId(key)];
	}
	
	public inline function exists(key:K) {
		return untyped this.hasOwnProperty(getId(key));
	}
	
	public function remove( key : K ) : Bool {
		var id = getId(key);
		if ( untyped !this.hasOwnProperty(id) ) return false;
		untyped  __js__("delete")(this[id]);
		untyped  __js__("delete")(this.__keys__[id]);
		return true;
	}
	
	public function keys() : Iterator<K> {
		var a = [];
		untyped {
			__js__("for( var key in this1.__keys__ ) {");
				if( this.hasOwnProperty(key) )
					a.push(this.__keys__[key]);
			__js__("}");
		}
		return a.iterator();
	}
	
	public function iterator() : Iterator<V> {
		return untyped {
			ref : this,
			it : keys(this),
			hasNext : function() { return __this__.it.hasNext(); },
			next : function() { var i = __this__.it.next(); return __this__.ref[getId(i)]; }
		};
	}
	
	public function toString() : String {
		var s = new StringBuf();
		s.add("{");
		var it = keys(this);
		for( i in it ) {
			s.add(i);
			s.add(" => ");
			s.add(Std.string(get(this,i)));
			if( it.hasNext() )
				s.add(", ");
		}
		s.add("}");
		return s.toString();
	}
}