Intellij IDEA plugin development. Action "create kotlin class"

Question

I want to create a plugin for Intellij IDEA. I need to add an action (AnAction) that will create a class in Kotlin (not Java) in a custom package. I have two questions:

• How to create files with the desired extension?
• Or how to create a file with Kotlin class(from some base class) in a custom package?

Answer 1

One possible way to accomplish this is to use PsiFileFactory.createFileFromText() to create an in-memory Kotlin file and then to pass that file as a parameter to PsiDirectory.add() to save it to the filesystem.