]>
git.wh0rd.org - tt-rss.git/blob - lib/dojo/store/DataStore.js
2 Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
3 Available via Academic Free License >= 2.1 OR the modified BSD license.
4 see: http://dojotoolkit.org/license for details
8 if(!dojo
._hasResource
["dojo.store.DataStore"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
9 dojo
._hasResource
["dojo.store.DataStore"] = true;
10 dojo
.provide("dojo.store.DataStore");
11 dojo
.require("dojo.store.util.QueryResults");
14 dojo
.declare("dojo.store.DataStore", null, {
16 constructor: function(options
){
18 // This is an adapter for using Dojo Data stores with an object store consumer.
19 // You can provide a Dojo data store and use this adapter to interact with it through
20 // the Dojo object store API
22 // This provides any configuration information that will be mixed into the store,
23 // including a reference to the Dojo data store under the property "store".
24 dojo
.mixin(this, options
);
26 _objectConverter: function(callback
){
27 var store
= this.store
;
28 return function(item
){
30 var attributes
= store
.getAttributes(item
);
31 for(var i
= 0; i
< attributes
.length
; i
++){
32 object
[attributes
[i
]] = store
.getValue(item
, attributes
[i
]);
34 return callback(object
);
37 get: function(id
, options
){
39 // Retrieves an object by it's identity. This will trigger a fetchItemByIdentity
41 // The identity to use to lookup the object
42 var returnedObject
, returnedError
;
43 var deferred
= new dojo
.Deferred();
44 this.store
.fetchItemByIdentity({
46 onItem
: this._objectConverter(function(object
){
47 deferred
.resolve(returnedObject
= object
);
49 onError: function(error
){
50 deferred
.reject(returnedError
= error
);
54 // if it was returned synchronously
55 return returnedObject
;
60 return deferred
.promise
;
62 put: function(object
, options
){
64 // Stores an object by its identity.
66 // The object to store.
68 // Additional metadata for storing the data. Includes a reference to an id
69 // that the object may be stored with (i.e. { id: "foo" }).
70 var id
= options
&& typeof options
.id
!= "undefined" || this.getIdentity(object
);
71 var store
= this.store
;
72 if(typeof id
== "undefined"){
73 store
.newItem(object
);
75 store
.fetchItemByIdentity({
77 onItem: function(item
){
80 if(store
.getValue(item
, i
) != object
[i
]){
81 store
.setValue(item
, i
, object
[i
]);
85 store
.newItem(object
);
93 // Deletes an object by its identity.
95 // The identity to use to delete the object
96 var store
= this.store
;
97 this.store
.fetchItemByIdentity({
99 onItem: function(item
){
100 store
.deleteItem(item
);
104 query: function(query
, options
){
106 // Queries the store for objects.
108 // The query to use for retrieving objects from the store
110 // Optional options object as used by the underlying dojo.data Store.
111 // returns: dojo.store.util.QueryResults
112 // A query results object that can be used to iterate over results.
113 var returnedObject
, returnedError
;
114 var deferred
= new dojo
.Deferred();
115 deferred
.total
= new dojo
.Deferred();
116 var converter
= this._objectConverter(function(object
){return object
;});
117 this.store
.fetch(dojo
.mixin({
119 onBegin: function(count
){
120 deferred
.total
.resolve(count
);
122 onComplete: function(results
){
123 deferred
.resolve(dojo
.map(results
, converter
));
125 onError: function(error
){
126 deferred
.reject(error
);
129 return dojo
.store
.util
.QueryResults(deferred
);
131 getIdentity: function(object
){
133 // Fetch the identity for the given object.
135 // The data object to get the identity from.
137 // The id of the given object.
138 return object
[this.idProperty
|| this.store
.getIdentityAttributes()[0]];