Custom file extensions

[kosta01857]

Is there a way to edit the source code, or somehow configure the LSP, to work with a custom file type
(For example, I have to work with files with .maxj extension for work related purposes)
NOTE: the files will contain normal java code, just a different name

[mickaelistria]

Do you manage to make this work in Eclipes IDE by adding *.maxj as possible name for "Java Source File" content-type ? If it can work in Eclipse IDE, then this can most likely be made to work in JDT-LS with some tweaks here and there; if it doesn't work with Eclipse IDE, then it probably cannot work either for JDT-LS.

[kosta01857]

Do you manage to make this work in Eclipes IDE by adding *.maxj as possible name for "Java Source File" content-type ? If it can work in Eclipse IDE, then this can most likely be made to work in JDT-LS with some tweaks here and there; if it doesn't work with Eclipse IDE, then it probably cannot work either for JDT-LS.

Yes, setting .maxj as Java Source File that does work. But I am not familiar with the JDTLS source code. I don't know how would I go about figuring out what changes to the settings or literal source code would make it behave this way

[snjeza]

@kosta01857 You can try the following:

1. add

"files.associations": {
        "*.maxj": "java",
    },

to your settings.json
2. find your workspace root - View>Command Palette>Java: Open Java Language Server Log File
You will see

...
Command-line arguments:  -data /home/<user>/.config/Code/User/workspaceStorage/<43ad0d37ddfff916c28b3ca3e295f158>/redhat.java/jdt_ws
...

add

content-types/org.eclipse.jdt.core.javaSource/file-extensions=maxj
eclipse.preferences.version=1

to /home/<user>/.config/Code/User/workspaceStorage/<43ad0d37ddfff916c28b3ca3e295f158>/redhat.java/jdt_ws/.metadata/.plugins/org.eclipse.core.runtime/.settings/org.eclipse.core.runtime.prefs

[kosta01857]

Ovo radi hvala na odgovoru. Jel znas kako bi napravio standalone JDTLS lsp server koji bi automatski prepoznavao .maxj files kao .java files

[snjeza]

@fbricon @mickaelistria @rgrunber @testforstephen We could add this feature. Do you agree?

[mickaelistria]

I think it would be an interesting addition.

[snjeza]

I have created #3222