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+define("dojo/store/util/QueryResults", ["../../_base/array", "../../_base/lang", "../../_base/Deferred"
+], function(array, lang, Deferred) {
+ // module:
+ // dojo/store/util/QueryResults
+ // summary:
+ // The module defines a query results wrapper
+
+var util = lang.getObject("dojo.store.util", true);
+
+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 = lang.delegate(results);
+ }
+ function addIterativeMethod(method){
+ if(!results[method]){
+ results[method] = function(){
+ var args = arguments;
+ return Deferred.when(results, function(results){
+ Array.prototype.unshift.call(args, results);
+ return util.QueryResults(array[method].apply(array, args));
+ });
+ };
+ }
+ }
+ addIterativeMethod("forEach");
+ addIterativeMethod("filter");
+ addIterativeMethod("map");
+ if(!results.total){
+ results.total = Deferred.when(results, function(results){
+ return results.length;
+ });
+ }
+ return results;
+};
+
+return util.QueryResults;
+});