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/*
Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
if(!dojo._hasResource["dojo.store.util.QueryResults"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojo.store.util.QueryResults"] = true;
dojo.provide("dojo.store.util.QueryResults");
dojo.getObject("store.util", true, dojo);
dojo.store.util.QueryResults = function(results){
// summary:
// A function that wraps the results of a store query with additional
// methods.
//
// description:
// QueryResults is a basic wrapper that allows for array-like iteration
// over any kind of returned data from a query. While the simplest store
// will return a plain array of data, other stores may return deferreds or
// promises; this wrapper makes sure that *all* results can be treated
// the same.
//
// Additional methods include `forEach`, `filter` and `map`.
//
// returns: Object
// An array-like object that can be used for iterating over.
//
// example:
// Query a store and iterate over the results.
//
// | store.query({ prime: true }).forEach(function(item){
// | // do something
// | });
if(!results){
return results;
}
// if it is a promise it may be frozen
if(results.then){
results = dojo.delegate(results);
}
function addIterativeMethod(method){
if(!results[method]){
results[method] = function(){
var args = arguments;
return dojo.when(results, function(results){
Array.prototype.unshift.call(args, results);
return dojo.store.util.QueryResults(dojo[method].apply(dojo, args));
});
};
}
}
addIterativeMethod("forEach");
addIterativeMethod("filter");
addIterativeMethod("map");
if(!results.total){
results.total = dojo.when(results, function(results){
return results.length;
});
}
return results;
};
}
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