Data Types

GadgetKeeper supports the following data types:

1. Primitives

Name	Description
boolean	Has only two possible values: `true` and `false.`
int	32-bit signed two's complement integer, which has a minimum value of -2³¹ and a maximum value of 2³¹-1.
long	64-bit signed two's complement integer, which has a minimum value of -2⁶³ and a maximum value of 2⁶³-1.
float	Single-precision 32-bit IEEE 754 floating point.
double	Double-precision 64-bit IEEE 754 floating point.
date	An instant in time, with no reference to a particular time zone or calendar system. A number of milliseconds since the Unix epoch.
string	Sequence of characters.
uuid	128-bit value universally unique identifier.

2. Arrays

An array is a container object that holds a number of values of a single type. GadgetKeeper arrays have no fixed length. Multiple dimensions are supported.

3. Structures

A complex data type declaration that defines a physically grouped list of variables to be placed under one name in a block of memory. The structure can contain many other complex and simple data type in an association. Structures can be organized in packages.

Please check Working With Structured Data Types for an example on working with structures.

Structure name has following requirements:

must start with a capital letter
must contain only alphanumeric characters

Structure package name has following requirements:

must start with a letter
must contain only alphanumeric characters and .(dot) as a package delimiter
must be written in all lower case
it's advised for companies to use their reversed Internet domain name to begin their package names - for example, com.example.mypackage for a package named mypackage created by a programmer at example.com.

Build-in structures

Location - location in geographic coordinate system.

Attributes
Name	Required	Data Type	Description
lat	true	double	latitude
lon	true	double	longitude

Please check Working With Location for an example.