HaxeFoundation.haxe/std/js/_std/Reflect.hx

/*
 * Copyright (c) 2005, The haXe Project Contributors
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE HAXE PROJECT CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE HAXE PROJECT CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

@:core_api class Reflect {

	public static function hasField( o : Dynamic, field : String ) : Bool {
		return untyped Object.prototype.hasOwnProperty.call(o, field);
	}

	public inline static function field( o : Dynamic, field : String ) : Dynamic untyped {
		var v = null;
		try {
			v = o[field];
		} catch( e : Dynamic ) {
		}
		return v;
	}

	public inline static function setField( o : Dynamic, field : String, value : Dynamic ) : Void untyped {
		o[field] = value;
	}

	@:defineFeature
	public static inline function getProperty( o : Dynamic, field : String ) : Dynamic untyped {
		var tmp;
		return if( o == null ) null else if( o.__properties__ && (tmp=o.__properties__["get_"+field]) ) o[tmp]() else o[field];
	}

	@:defineFeature
	public static inline function setProperty( o : Dynamic, field : String, value : Dynamic ) : Void untyped {
		var tmp;
		if( o.__properties__ && (tmp=o.__properties__["set_"+field]) ) o[tmp](value) else o[field] = value;
	}

	public inline static function callMethod( o : Dynamic, func : Dynamic, args : Array<Dynamic> ) : Dynamic untyped {
		return func.apply(o,args);
	}

	public static function fields( o : Dynamic ) : Array<String> {
		var a = [];
		if (o != null) untyped {
			var hasOwnProperty = Object.prototype.hasOwnProperty;
			__js__("for( var f in o ) {");
			if( hasOwnProperty.call(o, f) ) a.push(f);
			__js__("}");
		}
		return a;
	}

	public static function isFunction( f : Dynamic ) : Bool untyped {
		return __js__("typeof(f)") == "function" && !(js.Boot.isClass(f) || js.Boot.isEnum(f));
	}

	public static function compare<T>( a : T, b : T ) : Int {
		return ( a == b ) ? 0 : (((cast a) > (cast b)) ? 1 : -1);
	}

	public static function compareMethods( f1 : Dynamic, f2 : Dynamic ) : Bool {
		if( f1 == f2 )
			return true;
		if( !isFunction(f1) || !isFunction(f2) )
			return false;
		return f1.scope == f2.scope && f1.method == f2.method && f1.method != null;
	}

	public static function isObject( v : Dynamic ) : Bool untyped {
		if( v == null )
			return false;
		var t = __js__("typeof(v)");
		return (t == "string" || (t == "object" && !v.__enum__) || (t == "function" && (js.Boot.isClass(v) || js.Boot.isEnum(v))));
	}

	public static function deleteField( o : Dynamic, f : String ) : Bool untyped {
		if( !hasField(o,f) ) return false;
		__js__("delete")(o[f]);
		return true;
	}

	public static function copy<T>( o : T ) : T {
		var o2 : Dynamic = {};
		for( f in Reflect.fields(o) )
			Reflect.setField(o2,f,Reflect.field(o,f));
		return o2;
	}

	public static function makeVarArgs( f : Array<Dynamic> -> Dynamic ) : Dynamic {
		return function() {
			var a = untyped Array.prototype.slice.call(__js__("arguments"));
			return f(a);
		};
	}

}