Better Way to Include Content as-Is with Asciidoc Include Directive

Context

I am making a script that dynamically inserts include directives in code blocks on an AsciiDoc file and then generates a PDF out of that. A generated AsciiDoc file could look like this:

= Title

[source,java]
---
include::foo.java[]
---

I want the user to be free to include whatever char-based file he or she wants, even other AsciiDoc files.

Problems

My goal is to show the contents as are of these included files. I run into problems when the included file:

• is recognized as AsciiDoc beacuse of its extension, an thus any include directives it has are interpreted. I don't want nested includes, just to show the include directive in the code block. Example of undesired behaviour:

• contains the code block delimiter ----, as seen on the image above when I end up with two code blocks instead of the intended single one. In this case, it does not matter if the file is recognized as an AsciiDoc file, the problem persists.