B4J Question B4J "scripting" support for UI applications?

[m4.s]

Maybe an odd question, but think 1990's desktop software that supported embedded macros and wizards, written by users to extend/enhance out-of-the-box functionality...

B4J supports inline Java code, to perform some things that B4J can't. {Albeit I've personally never used this powerful feature, to-date at least.}

Yet I've not seen any forum threads that ask whether B4J code, written by B4J application users (i.e. not by developers, like B4J libraries and custom views are), can be interpreted or compiled on-the-fly and yield UI controls -- and trigger their related event code too (again, as written by users) -- added to a specified pane in the [parent] B4J application?

I assume the answer is "No". If so, then alternatively could a Java code file written by a B4J application user be dynamically loaded from a non-app directory (and compiled in memory) to accomplish the same?

If that's a second "No", then can a B4J-generated .jar file be dynamically called and executed from a parent B4J application (and visually attach itself to a specified [child] pane displayed within the parent application)?

 

[Erel]

B4J supports inline Java code, to perform some things that B4J can't. {Albeit I've personally never used this powerful feature, to-date at least.}

Not really related. The inline java code is compiled together with the Java code generated from the B4J code.

I assume the answer is "No".

That's correct.

It is possible to load jars at runtime. Example: https://www.b4x.com/android/forum/threads/abplugin-live-plugin-library-for-your-apps.67395/#content

 

[alwaysbusy]

I once did an experiment ABPlugin. Not sure if it still works.

[ABPlugin] Live plugin library for your apps

This little library makes it possible to create Live plugins for you own apps. This means you can create plugins that can be added/removed while your app is running. Note it is a little experiment that shows the power of B4J. The 'compile to library' feature of B4J is very handy to create...

www.b4x.com

Alwaysbusy

 

[agraham]

jBasicLib embedded Basic interpreter library

Nearly six years ago I posted the original B4A version of this library that was in fact a port to Java from the original Basic4ppc .Net C# version that I wrote even earlier. Shortly after that I gave up Android development out of disgust with Google and returned to playing with Basic4ppc and C#...

www.b4x.com

The syntax is not quite B4J code but it's close being based on the non-object oriented common ancestor - Basic4ppc. I've used the B4A equivalent library to implement an on-device IDE, including UI elements and events. It should be easy to do a similar thing with B4J.

BasicIDE Suite 2 - Now with on-device visual designer and syntax highlighting editor!

BasicIDE Suite 2 is now deprecated in favour of the newer BasicIDE Suite 3 BasicIDE Suite 3 - Now further improved | B4X Programming Forum BasicIDE version 5.2 now includes an improved editor with syntax highlighting, runtime error indication and autocompletion. You need the new CodeEditorView...

www.b4x.com

 

[xulihang]

I know a java project called OmageT which uses groovy and javascript to write scripts. I don't know if it can be done in B4J as well.

 

[m4.s]

Thanks to all those members who provided feedback. Unfortunately, nothing really fits/addresses my requirements - so I will implement this functionality in my B4J application via an alternative custom solution; first via a proof-of-concept (POC), which will likely warrant some future forum questions!