What's the expected format of identifier in the JavaFX Gradle plugin?

Question

In the JavaFX-Gradle-Plugin there's an option called identifier:

// gradle jfxNative
identifier = null  // String - setting this for windows-bundlers makes it possible to generate upgradeable installers (using same GUID)

and I can't find the equivalent in the jafaxpackager's documentation.

What's the expected format of this option?

Answer 1

I found the answer in this documentation:

https://docs.oracle.com/javase/8/docs/technotes/guides/deploy/self-contained-packaging.html#sthref59

Tries to use the application identifier as UpgradeCode. If the application identifier is not a valid GUID, then a random GUID for UpgradeCode is generated.

UpgradeCode is defined as:

The UpgradeCode property is a GUID representing a related set of products. The UpgradeCode is used in the Upgrade Table to search for related versions of the product that are already installed.

This property is used by the RegisterProduct action.

Remarks

It is strongly recommended that authors of installation packages specify an UpgradeCode for their application.

And GUID:

The GUID data type is a text string representing a Class identifier (ID). COM must be able to convert the string to a valid Class ID. All GUIDs must be authored in uppercase.

The valid format for a GUID is {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX} where X is a hex digit (0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F).

Note that utilities such as GUIDGEN can generate GUIDs containing lowercase letters. These must all be changed to uppercase letters before the GUID can be used by the installer as a valid product code, package code, or component code.