Export LCA programmatically

Hi there, is there any way to export LCA via java api?

I have tried this:

ApplicationManager appManager = new ApplicationManager(myFactory);

        try {

            List<Application> applications = appManager.getApplications();

            ApplicationId applicationId = applications.get(0).getApplicationId();

            ApplicationDocument appDoc = ApplicationDocument.Factory.parse(new File("D:\\MyApplication\\app.info"));

            exportApplicationArchive = appManager.exportApplicationArchive(appDoc);

but somehow the exported LCA only contain the app.info.

Is it a bug in the api or something wrong in my code?