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