B4J Question Library selection based on Build configuration (not external jars)

Jmu5667 · Feb 13, 2025

Hello

This question is based on being able to use jserver3 or jserver4 based on a build condition. I am not referring to external jars, on the libraries in the Additional and Internal folders

Here is an example od what I currently do for mssql-jdbc

B4X:

#if java11
        #JavaCompilerPath: 19, C:\Java\jdk-19.0.2\bin\javac.exe    
        #AdditionalJar: C:\Java\jdbc\sqljdbc_12.8\enu\jars\mssql-jdbc-12.8.1.jre11.jar
    #else
        #JavaCompilerPath: 8, C:\Java\jdk1.8.0_351\bin\javac.exe
        #AdditionalJar: mssql-jdbc-6.2.2.jre8.jar
    #End If

You can see what is going on here. I was wondering is the another # directive to allow me user a library from addition or internal

Thanks in advance

John.

aeric · Feb 13, 2025

Jmu5667 said:
allow me user a library from addition or internal

I think both libraries must have different class name.
Just declare the object as usual.

B4X:

Sub Process_Globals
    #If Condition1
    Public MyObject As ClassFromAdditionalLibrary
    #Else
    Public MyObject As ClassFromInternalLibrary
    #End If

Jmu5667 · Feb 13, 2025

Interesting, it's jServer3 and JServer4, I will try your suggestion.

Jmu5667 · Feb 13, 2025

aeric said:
I think both libraries must have different class name.
Just declare the object as usual.

B4X:

Sub Process_Globals #If Condition1 Public MyObject As ClassFromAdditionalLibrary #Else Public MyObject As ClassFromInternalLibrary #End If

This suggestion does not acheive my objective as the classname is the same for both.

Sandman · Feb 13, 2025

This Wish from 2018 seems to relate to your question.

Allow overriding global paths in source

Specifically, I'd like to be able to override the Additional Libraries value, perhaps by doing this: #AdditionalLibraries: path-goes-here I've posted another wish on this theme way back, which I liked a lot more, but that didn't seem to get any traction so I'm trying this solution instead...

www.b4x.com

Jmu5667 · Feb 13, 2025

Sandman said:
This Wish from 2018 seems to relate to your question.

Allow overriding global paths in source

Specifically, I'd like to be able to override the Additional Libraries value, perhaps by doing this: #AdditionalLibraries: path-goes-here I've posted another wish on this theme way back, which I liked a lot more, but that didn't seem to get any traction so I'm trying this solution instead...

www.b4x.com

Loved your response to the reply ! I guess its similar. To sumerise, all I would like to do is to include a library without having to select it from the Libraries Manager Tab. Example:

#useLibrary: C:\B4X\B4J\Aditional Libraries\jServer-11.0.24.jar (@tchart)

By doing this the ide would treat this the same as if I selected it from the Libraries Manager Tab.

Sandman · Feb 13, 2025

Thanks.

Yes, for your case you would simply do this:

B4X:

#if java11
    #AdditionalLibraries: path-to-dir-with-jServer3
#else
    #AdditionalLibraries: path-to-dir-with-jServer4
#End If

However, in fairness, two more things would need to happen if you compare to my suggestion. The first one is that the additionaldirs are additive, so you have the standard additional libraries, and then you add another dir (in the code above), which in this example contains only contains the jServer libraries. The second one is that you would have to enable all build configurations and actually enable the dirs for both cases.

Jmu5667 · Feb 13, 2025

Yep, if you have the ability to include a library using #AdditionalLibraries, which can point to anywhere then you can configure till the heart is content (@Erel please )

slight correction

B4X:

#if java11
    #AdditionalLibraries: path-to-dir-with-jServer4
#else
    #AdditionalLibraries: path-to-dir-with-jServer3
#End If

Sandman · Feb 13, 2025

Jmu5667 said:
Yep, if you have the ability to include a library using #AdditionalLibraries, which can point to anywhere then you can configure till the heart is content (@Erel please )

I fear that the majority of the forum members, with Erel being one of them, are deeply in the "just shove the lot into one dir and let the compiler sort it out, we don't need no stinkin' order or structure". (In my head I hear that said with the voice from someone working the docks around 1800.) I imagine it's a result of B4X mainly being used by hobbyists and smaller companies, where there are no real expectations of keeping things strict. That's what it looks like from where I'm standing, anyway. (And for the record: I'm represent a smaller company, but we do have expectations of keeping things strict and in order.)

tchart · Feb 14, 2025

Jmu5667 said:
Yep, if you have the ability to include a library using #AdditionalLibraries, which can point to anywhere then you can configure till the heart is content (@Erel please )

slight correction

B4X:

#if java11 #AdditionalLibraries: path-to-dir-with-jServer4 #else #AdditionalLibraries: path-to-dir-with-jServer3 #End If

You should probably add this to the Wishlist for B4J. I would like this too but I guess the issue is the intellisense for library objects wouldn’t populate if it was dynamic.

Sandman · Feb 14, 2025

tchart said:
I would like this too but I guess the issue is the intellisense for library objects wouldn’t populate if it was dynamic.

I can't imagine that would be a problem. There would effectively be nothing different from enabling or disabling any library, which the intellisense handle just fine. I imagine the problem is rather that Erel simply dislikes the idea and had decided that there shall only be one dir for additional libraries.

Erel · Feb 16, 2025

Sandman said:
I imagine the problem is rather that Erel simply dislikes the idea and had decided that there shall only be one dir for additional libraries.

Not at all. It is more of a technical challenge. It will be implemented at some point (the ability to reference libraries based on build configuration).

Sandman · Feb 16, 2025

Erel said:
Not at all. It is more of a technical challenge. It will be implemented at some point (the ability to reference libraries based on build configuration).

That's nice to hear. Does this also mean you're, in principle, positive to the many wishes for having multiple dirs with additional libraries? Such as this one, for example:

Allow overriding global paths in source

Specifically, I'd like to be able to override the Additional Libraries value, perhaps by doing this: #AdditionalLibraries: path-goes-here I've posted another wish on this theme way back, which I liked a lot more, but that didn't seem to get any traction so I'm trying this solution instead...

www.b4x.com

Erel · Feb 16, 2025

Not sure...

Sandman · Feb 16, 2025

Erel said:
Not sure...

For whatever it's worth, I do appreciate getting a response and that's it not a flat out no.

I'll see if I can post a new wish in the coming months where I try to make it as clear as possible why this would be a very nice feature for some developers.

B4J Question Library selection based on Build configuration (not external jars)

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