Here you will know how to decode a JSON-formate string to an object, JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal data-interchange language.
Here is the method:
1. <?xml version="1.0" encoding="utf-8"?>
2. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="initApp()">
3. <mx:Style>
4. global
5. {
6. fontSize:14;
7. }
8. </mx:Style>
9. <mx:Script>
10. <![CDATA[
11. import flash.utils.describeType;
12. import mx.utils.ObjectUtil;
13. import com.adobe.serialization.json.JSON;
14.
15. private var myObject:Object;
16.
17. [Bindable]
18. private var encodedObjectString:String;
19.
20. [Bindable]
21. private var decodedObjectString:String;
22.
23. private function initApp():void
24. {
25. myObject = new Object();
26.
27. myObject.id = "userCollection";
28. myObject.users = new Array();
29.
30. for(var i:uint = 0 ;i < 2;i++)
31. {
32. var user:Object = new Object();
33. user.name = "user" + i;
34. user.password = "password" + i;
35. user.login = i%2==0? true : false;
36. user.role = new Object();
37. user.role.name = "user";
38. user.flags = new Array(1,2,3,4,5,6);
39. (myObject.users as Array).push(user);
40. }
41.
42. myObject.userCount = (myObject.users as Array).length;
43. myObject.extension = null;
44. myObject.flags = new Array("a","b","c",false,1,5,77,null);
45.
46. /* ************** encode myObject to JSON string ************** */
47. encodedObjectString = JSON.encode(myObject);
48. /* ************************************************************ */
49.
50. decodedObjectString = getDecodedObjectString(myObject);
51. }
52.
53. private function getDecodedObjectString(obj:Object,level:int = 0):String
54. {
55. var prefix:String = "";
56. for(var i:int = 0;i < level; i++)
57. {
58. prefix += " ";
59. }
60. level++;
61.
62. var retValue:String = "";
63. var objProperties:Object = ObjectUtil.getClassInfo(obj);
64.
65. if(objProperties.properties.length>0)
66. {
67. for each(var qname:QName in objProperties.properties)
68. {
69. var property:* = obj[qname.localName];
70. var propertyType:String = getQualifiedClassName(property);
71.
72. switch(propertyType)
73. {
74. case "null":
75. retValue += prefix + qname.localName + "(" + propertyType + ")" + ":" + property + "
";
76. break;
77. case "String":
78. retValue += prefix + qname.localName + "(" + propertyType + ")" + ":" + """ + property + """ + "
";
79. break;
80. case "int":
81. retValue += prefix + qname.localName + "(" + propertyType + ")" + ":" + property + "
";
82. break;
83. case "Array":
84. retValue += prefix + qname.localName + "(" + propertyType + ")" + ":" + "
" + getDecodedObjectStringFromArray(property,level) + "
";
85. break;
86. case "Object":
87. retValue += prefix + qname.localName + "(" + propertyType + ")" + ":" + "
" + getDecodedObjectString(property,level) + "
";
88. break;
89. case "Boolean":
90. retValue += prefix + qname.localName + "(" + propertyType + ")" + ":" + property + "
";
91. break;
92. }
93. }
94. }
95. return retValue;
96. }
97.
98. private function getDecodedObjectStringFromArray(arr:Array,level:int):String
99. {
100. var prefix:String = "";
101. for(var i:int = 0;i < level; i++)
102. {
103. prefix += " ";
104. }
105. level++;
106.
107. var retValue:String = "";
108. var index:int = 0;
109.
110. for each(var value:* in arr)
111. {
112. var type:String = getQualifiedClassName(value);
113.
114. switch(type)
115. {
116. case "null":
117. retValue += (index == 0?prefix:"") + "(" + type + ")" + value + ",";
118. break;
119. case "String":
120. retValue += (index == 0?prefix:"") + "(" + type + ")" + value + ",";
121. break;
122. case "int":
123. retValue += (index == 0?prefix:"") + "(" + type + ")" + value + ",";
124. break;
125. case "Array":
126. retValue += prefix + "(" + type + ")" + getDecodedObjectStringFromArray(value,level);
127. break;
128. case "Object":
129. retValue += prefix + "(" + type + ")" + "
" +getDecodedObjectString(value,level);
130. break;
131. case "Boolean":
132. retValue += (index == 0?prefix:"") + "(" + type + ")" + value + ",";
133. break;
134. }
135.
136. index++;
137. }
138. return retValue;
139. }
140.
141. private function updateDecodedObjectString():void
142. {
143. try
144. {
145. /* ************** decode JSON string to an object ************** */
146. myObject = JSON.decode(encodedString.text);
147. /* ************************************************************* */
148. decodedObjectString = getDecodedObjectString(myObject);
149. }
150. catch(e:Error)
151. {
152.
153. }
154. }
155. ]]>
156. </mx:Script>
157. <mx:Panel title="JSON Demo" width="100%" height="100%" layout="absolute">
158. <mx:TextArea id="encodedString" text="{encodedObjectString}" width="50%" height="100%" right="0" top="0" change="updateDecodedObjectString()"/>
159. <mx:VBox width="50%" left="0" height="100%">
160. <mx:Label text="object properties" fontWeight="bold"/>
161. <mx:TextArea editable="false" height="100%" width="100%" text="{decodedObjectString}"/>
162. </mx:VBox>
163. </mx:Panel>
164. </mx:Application>
Original Source:
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