I'm looking to add content to my mod from inside the assets folder.  However I'm not sure what the accepted style for doing that is, and how it might interact with resource packs and such.

 

My goal is to iterate over a directory inside Assets/modid/, find all the files with a specific extension, and get an instance of FileReader for each.

 

Example directory structure:

• Assets/modid
  
  • lang
    
  • symbols
    • colors
      
      • Pink.symbol
        
      • Tan.symbol

      [*]lengths

      • SeventhLength.symbol
        
      • FifthLength.symbol
        
      • ThirdLength.symbol
        
      • TripleLength.symbol
        
      • QuintupleLength.symbol
        
      • SeptupleLength.symbol
        
      • RealLength.symbol

EDIT: Fixed list formatting

Ah.  Simple, concise, and clear, thanks.  That explains why I couldn't find anything with more generic searches on loading from classpath, though I'm surprised there wasn't a similar explanation.

 

I've got the basics set up reading from a config file, but I was reading files with groups of symbols in them.  I was hoping to switch to reading a single symbol per file (to cut down on json indentation levels) as I switched to reading from assets.  But if I'll need to maintain an index then I'll just keep using grouped files.

Ah.  Simple, concise, and clear, thanks.  That explains why I couldn't find anything with more generic searches on loading from classpath, though I'm surprised there wasn't a similar explanation.

 

I've got the basics set up reading from a config file, but I was reading files with groups of symbols in them.  I was hoping to switch to reading a single symbol per file (to cut down on json indentation levels) as I switched to reading from assets.  But if I'll need to maintain an index then I'll just keep using grouped files.

 

You actually can list files from your classpath using the code below:

        InputStream stream = this.getClass().getClassLoader().getResourceAsStream("assets/enderstuffp");
        BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
        try {
            while( reader.ready() ) {
                System.out.println(reader.readLine());
            }
        } catch( IOException e ) {
            e.printStackTrace();
        }

where this represents your mod class and "assets/enderstuffp" is your assets folder

It prints a list into your console of all files and folders within the assets folder.

Please note that it doesn't do a "deep-search", so you need to write your own method for that if you desire to do a deep search.

Oh really? That Works? Reliably? Is it documented?

 

I tried it and it seems to work, even if I compile it and load it up as a jar.

New to me, thanks for that

I will see if I can find some documentation on that.

 

Here is where I've got the code from:

http://stackoverflow.com/questions/13848333/accessing-files-in-specific-folder-in-classpath-using-java

 

And as I said, it seems to work, at least for me.

 

EDIT: If you want to know if a path is a file or a directory, convert the path into an URL, which then is converted into a File (for some reason if I suppy the path string directly, it always thinks it's a file):

File file = new File(this.getClass().getClassLoader().getResource("assets/enderstuffp/" + name).toURI());
System.out.println(file.isDirectory());

Thank you very much, I'll try that out!

This worked perfectly, though I had trouble because my resource path was already defined in code as an absolute path rather than a relative path, and it caused some issues.  I got everything up to the directory check working by using Main.class, but I couldn't get the directory check to work.  Once I switched over to relative path I could use the classloader instead of the main class, and now I recursively search folders for children without worry.

 

Thanks again!