All sources open as java even when they are not.

Go to definition opens external sources as a .class file. As far as I can tell a file extension can only belong to a single language. In this case .class is related to java? The actual source file that corresponds to the .class file is not always a .java file. I suspect that if the source was opened as a .java, .scala, .clj etc... vscode would give proper syntax highlighting for the source

Environment

• Operating System: OSX 10.14.5
• JDK version: 1.8.0_162
• Visual Studio Code version: 1.36.1
• Java extension version: redhat.java@0.47.0

Steps To Reproduce

1. Include a maven dependency that is not written in java.
2. Go to definition for a class in that dependency.

Here is a sample project includes a scala kafka client. org.sample.app.App declares a SimpleConsumer, F12 on it.
non-java-dep-sources-sample.zip

Current Result

The source opens as a .class file and attempts to use the java syntax highlighting.

Expected Result

I would expect the source to not be assumed as java. With the scala extension installed I would expect scala highlighting to work.
Scala extension: https://marketplace.visualstudio.com/items?itemName=scala-lang.scala

Additional Informations

I did see #786 and it said that the .class extension is working as designed. I see this as a short coming. The .class extension makes sense if you are viewing decompiled code, but not once sources are available.

Inizia con il flusso Go to definition per le sorgenti esterne e riproduci il comportamento usando il progetto collegato non-java-dep-sources-sample.zip, incluso il relativo Scala Kafka client. Traccia il motivo per cui le sorgenti disponibili vengono aperte come file .class, quindi verifica che non si presuma più che la sorgente sia Java e che l’estensione Scala installata possa fornire l’evidenziazione della sintassi.