code: @Override
  	public void walkTree(IResourceVisitor visitor) throws IOException {
  		if (!exists()) {
  			throw new FileNotFoundException(file.getAbsolutePath());
  		}
  		if (!file.isDirectory()) {
  			return;
  		}
  		recurse(file, visitor, ""); //$NON-NLS-1$
  	}
docs: /*
  (non-Javadoc)
  
  @see
  com.ibm.jaggr.service.modules.Resource#walkTree(com.ibm.jaggr.modules
  .ResourceVisitor, boolean)