flymis/WebRoot/dojojs/src/AdapterRegistry.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

dojo.provide("dojo.AdapterRegistry");
dojo.require("dojo.lang.func");

dojo.AdapterRegistry = function(/*boolean, optional*/returnWrappers){
	// summary:
	//		A registry to make contextual calling/searching easier.
	// description:
	//		Objects of this class keep list of arrays in the form [name, check,
	//		wrap, directReturn] that are used to determine what the contextual
	//		result of a set of checked arguments is. All check/wrap functions
	//		in this registry should be of the same arity.
	this.pairs = [];
	this.returnWrappers = returnWrappers || false;
}

dojo.lang.extend(dojo.AdapterRegistry, {
	register: function(	/*string*/ name, /*function*/ check, /*function*/ wrap, 
						/*boolean, optional*/ directReturn, 
						/*boolean, optional*/ override){
		// summary: 
		//		register a check function to determine if the wrap function or
		//		object gets selected
		// name: a way to identify this matcher.
		// check:
		//		a function that arguments are passed to from the adapter's
		//		match() function.  The check function should return true if the
		//		given arguments are appropriate for the wrap function.
		// directReturn:
		//		If directReturn is true, the value passed in for wrap will be
		//		returned instead of being called. Alternately, the
		//		AdapterRegistry can be set globally to "return not call" using
		//		the returnWrappers property. Either way, this behavior allows
		//		the registry to act as a "search" function instead of a
		//		function interception library.
		// override:
		//		If override is given and true, the check function will be given
		//		highest priority. Otherwise, it will be the lowest priority
		//		adapter.

		var type = (override) ? "unshift" : "push";
		this.pairs[type]([name, check, wrap, directReturn]);
	},

	match: function(/* ... */){
        // summary:
		//		Find an adapter for the given arguments. If no suitable adapter
		//		is found, throws an exception. match() accepts any number of
		//		arguments, all of which are passed to all matching functions
		//		from the registered pairs.
		for(var i = 0; i < this.pairs.length; i++){