Undo effects of java mkdirs()

Question

I have a situation where I need to run a "pre-check" to see if a directory is "createable". This is not a problem, just run a file.mkdirs() and see if it returns true.

The problem is that I would like to clean up after this check. This is a bit tricky, because I want to delete only those folders and subfolder that mkdirs() actually created.

Can anyone think of a clever way to do this?

Answer 1

I think this method does the job without you having to call mkdirs:

public static boolean canMkdirs(File dir) {
    if(dir == null || dir.exists())
        return false;
    File parent = null;
    try {
        parent = dir.getCanonicalFile().getParentFile();
        while(!parent.exists())
            parent = parent.getParentFile();
    } catch(NullPointerException | IOException e) {
        return false;
    }
    return parent.isDirectory() && parent.canWrite();
}