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1318 alexandre_ 1 
/*
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	Copyright (c) 2004-2006, The Dojo Foundation
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	All Rights Reserved.
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	Licensed under the Academic Free License version 2.1 or above OR the
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	modified BSD license. For more information on Dojo licensing, see:
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		http://dojotoolkit.org/community/licensing.shtml
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*/
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1422 alexandre_ 11 
 
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1318 alexandre_ 13 
dojo.provide("dojo.collections.Set");
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dojo.require("dojo.collections.Collections");
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dojo.require("dojo.collections.ArrayList");
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dojo.collections.Set = new function () {
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	this.union = function (setA, setB) {
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		if (setA.constructor == Array) {
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			var setA = new dojo.collections.ArrayList(setA);
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		}
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		if (setB.constructor == Array) {
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			var setB = new dojo.collections.ArrayList(setB);
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		}
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		if (!setA.toArray || !setB.toArray) {
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			dojo.raise("Set operations can only be performed on array-based collections.");
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		}
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		var result = new dojo.collections.ArrayList(setA.toArray());
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		var e = setB.getIterator();
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		while (!e.atEnd()) {
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			var item = e.get();
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			if (!result.contains(item)) {
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				result.add(item);
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			}
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		}
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		return result;
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	};
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	this.intersection = function (setA, setB) {
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		if (setA.constructor == Array) {
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			var setA = new dojo.collections.ArrayList(setA);
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		}
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		if (setB.constructor == Array) {
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			var setB = new dojo.collections.ArrayList(setB);
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		}
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		if (!setA.toArray || !setB.toArray) {
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			dojo.raise("Set operations can only be performed on array-based collections.");
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		}
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		var result = new dojo.collections.ArrayList();
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		var e = setB.getIterator();
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		while (!e.atEnd()) {
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			var item = e.get();
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			if (setA.contains(item)) {
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				result.add(item);
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			}
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		}
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		return result;
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	};
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	this.difference = function (setA, setB) {
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		if (setA.constructor == Array) {
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			var setA = new dojo.collections.ArrayList(setA);
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		}
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		if (setB.constructor == Array) {
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			var setB = new dojo.collections.ArrayList(setB);
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		}
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		if (!setA.toArray || !setB.toArray) {
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			dojo.raise("Set operations can only be performed on array-based collections.");
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		}
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		var result = new dojo.collections.ArrayList();
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		var e = setA.getIterator();
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		while (!e.atEnd()) {
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			var item = e.get();
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			if (!setB.contains(item)) {
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				result.add(item);
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			}
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		}
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		return result;
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	};
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	this.isSubSet = function (setA, setB) {
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		if (setA.constructor == Array) {
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			var setA = new dojo.collections.ArrayList(setA);
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		}
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		if (setB.constructor == Array) {
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			var setB = new dojo.collections.ArrayList(setB);
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		}
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		if (!setA.toArray || !setB.toArray) {
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			dojo.raise("Set operations can only be performed on array-based collections.");
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		}
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		var e = setA.getIterator();
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		while (!e.atEnd()) {
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			if (!setB.contains(e.get())) {
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				return false;
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			}
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		}
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		return true;
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	};
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	this.isSuperSet = function (setA, setB) {
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		if (setA.constructor == Array) {
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			var setA = new dojo.collections.ArrayList(setA);
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		}
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		if (setB.constructor == Array) {
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			var setB = new dojo.collections.ArrayList(setB);
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		}
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		if (!setA.toArray || !setB.toArray) {
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			dojo.raise("Set operations can only be performed on array-based collections.");
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		}
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		var e = setB.getIterator();
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		while (!e.atEnd()) {
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			if (!setA.contains(e.get())) {
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				return false;
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			}
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		}
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		return true;
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	};
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}();
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