1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/*
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.Memory"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojo.store.Memory"] = true;
dojo.provide("dojo.store.Memory");
dojo.require("dojo.store.util.QueryResults");
dojo.require("dojo.store.util.SimpleQueryEngine");
dojo.declare("dojo.store.Memory", null, {
// summary:
// This is a basic in-memory object store. It implements dojo.store.api.Store.
constructor: function(/*dojo.store.Memory*/ options){
// summary:
// Creates a memory object store.
// options:
// This provides any configuration information that will be mixed into the store.
// This should generally include the data property to provide the starting set of data.
this.index = {};
dojo.mixin(this, options);
this.setData(this.data || []);
},
// data: Array
// The array of all the objects in the memory store
data:null,
// idProperty: String
// Indicates the property to use as the identity property. The values of this
// property should be unique.
idProperty: "id",
// index: Object
// An index of data by id
index:null,
// queryEngine: Function
// Defines the query engine to use for querying the data store
queryEngine: dojo.store.util.SimpleQueryEngine,
get: function(id){
// summary:
// Retrieves an object by its identity
// id: Number
// The identity to use to lookup the object
// returns: Object
// The object in the store that matches the given id.
return this.index[id];
},
getIdentity: function(object){
// summary:
// Returns an object's identity
// object: Object
// The object to get the identity from
// returns: Number
return object[this.idProperty];
},
put: function(object, options){
// summary:
// Stores an object
// object: Object
// The object to store.
// options: dojo.store.api.Store.PutDirectives??
// Additional metadata for storing the data. Includes an "id"
// property if a specific id is to be used.
// returns: Number
var id = options && options.id || object[this.idProperty] || Math.random();
this.index[id] = object;
var data = this.data,
idProperty = this.idProperty;
for(var i = 0, l = data.length; i < l; i++){
if(data[i][idProperty] == id){
data[i] = object;
return id;
}
}
this.data.push(object);
return id;
},
add: function(object, options){
// summary:
// Creates an object, throws an error if the object already exists
// object: Object
// The object to store.
// options: dojo.store.api.Store.PutDirectives??
// Additional metadata for storing the data. Includes an "id"
// property if a specific id is to be used.
// returns: Number
if(this.index[options && options.id || object[this.idProperty]]){
throw new Error("Object already exists");
}
return this.put(object, options);
},
remove: function(id){
// summary:
// Deletes an object by its identity
// id: Number
// The identity to use to delete the object
delete this.index[id];
var data = this.data,
idProperty = this.idProperty;
for(var i = 0, l = data.length; i < l; i++){
if(data[i][idProperty] == id){
data.splice(i, 1);
return;
}
}
},
query: function(query, options){
// summary:
// Queries the store for objects.
// query: Object
// The query to use for retrieving objects from the store.
// options: dojo.store.api.Store.QueryOptions?
// The optional arguments to apply to the resultset.
// returns: dojo.store.api.Store.QueryResults
// The results of the query, extended with iterative methods.
//
// example:
// Given the following store:
//
// | var store = new dojo.store.Memory({
// | data: [
// | {id: 1, name: "one", prime: false },
// | {id: 2, name: "two", even: true, prime: true},
// | {id: 3, name: "three", prime: true},
// | {id: 4, name: "four", even: true, prime: false},
// | {id: 5, name: "five", prime: true}
// | ]
// | });
//
// ...find all items where "prime" is true:
//
// | var results = store.query({ prime: true });
//
// ...or find all items where "even" is true:
//
// | var results = store.query({ even: true });
return dojo.store.util.QueryResults(this.queryEngine(query, options)(this.data));
},
setData: function(data){
// summary:
// Sets the given data as the source for this store, and indexes it
// data: Object[]
// An array of objects to use as the source of data.
if(data.items){
// just for convenience with the data format IFRS expects
this.idProperty = data.identifier;
data = this.data = data.items;
}else{
this.data = data;
}
for(var i = 0, l = data.length; i < l; i++){
var object = data[i];
this.index[object[this.idProperty]] = object;
}
}
});
}
|
