JSONDATA

10.8, PLBCMP GUI Only

The JSONDATA PL/B object provides functionality to generate, retrieve, modify, and delete fields within a JSONDATA object. Each field consists of a key-value pair using the standard JSON syntax: "key":value. In addition to basic types, the PL/B JSONDATA object supports complex types-- object and array -- which are represented using curly braces {} and square brackets [], respectively.The declaration syntax of a JSONDATA object is as follows:

(1)	[label]	JSONDATA	[%\|^][arraysize]
(2)	[label]	JSONDATA	^,{target}
(3)	[label]	JSONDATA	^(arraysize),({target}),...,({target})

Where:

label

Optional. A Data Label.

Optional. Denotes the item as being GLOBAL.

arraysize

Required. An integer decimal constant, CONST variable, or EQUATEd value indicating the number of array items.

Optional. Denotes the item as being a POINTER.

target

Required. The name of a previously defined data item of the same type.

Flags Affected: NONE

Note the following:

The JSONDATA object is implicitly created when a method is executed.
The JSONDATA object can be used in a DESTROY instruction.
The alias JSON can be used in place of JSONDATA when declaring a JSONDATA object
The JSON field types are broken down into the following basic types for the JSONDATA PL/B object:

JSON Type	Description	Example
string	Text enclosed in double quotes.	"name":"James"
number (Integer)	Integer value.	"age":54
number (Double)	Floating-point value.	"score":95.8
boolean	Logical true/false.	"active":true
null	Explicitly represents no value.	"middleName":null
object	Collection of key-value pairs.	"user":{"id":1,"name":"E"}
array	Ordered list of values (any type).	"tags":["dev","win32"]

See Also: Object Definitions