class LocalDirAllocator {

  public Path getLocalPathToRead(String pathStr, 
      Configuration conf) throws IOException {
    AllocatorPerContext context = obtainContext(contextCfgItemName);
    return context.getLocalPathToRead(pathStr, conf);
  }

  public  LocalDirAllocator(String contextCfgItemName);
  public  LocalDirAllocator(String contextCfgItemName,
          DiskValidator diskValidator);

}