I’m trying to write an IntelliJ plugin.

I’m already able to read it line by line with a Stream, taking the plain text from the PsiFile, and generating the XmlDocument starting from there, but that’s not the most efficient way to do it and I wouldn’t be able to edit it like that.

I have different XML files, with random nodes so I should find a way to get all the nodes in a single file, filter them by taking only those that have the “android:id” attribute.
Then take this list of nodes that have this attribute, and edit the value of this attribute.

I’m successfully getting the PsiFile from the action event, but I don’t understand how to:

1. Cast the PsiFile to something like XmlFile or get the XmlDocument from PsiFile (if needed)
2. Get a list of all the nodes of the XML file
3. Edit that specific attribute value I need to edit (do I need to perform any other step to save the file? Or is it just enough to edit the nodes?)

I already went through this documentation, but the more I read it the more it makes me sick. There is no example provided, just things like “Implement this interface, and that’s it, you’re done!”.