Пример #1
0
  /**
   * Create a new FSDirectory for the named location (ctor for subclasses).
   *
   * @param path the path of the directory
   * @param lockFactory the lock factory to use, or null for the default ({@link
   *     NativeFSLockFactory});
   * @throws IOException if there is a low-level I/O error
   */
  protected FSDirectory(File path, LockFactory lockFactory) throws IOException {
    // new ctors use always NativeFSLockFactory as default:
    if (lockFactory == null) {
      lockFactory = new NativeFSLockFactory();
    }
    directory = getCanonicalPath(path);

    if (directory.exists() && !directory.isDirectory())
      throw new NoSuchDirectoryException("file '" + directory + "' exists but is not a directory");

    setLockFactory(lockFactory);
  }
  /**
   * Creates an FSDirectory in provided directory and initializes an index if not already existing.
   *
   * @param indexDir the directory where to write a new index
   * @param properties the configuration properties
   * @return the created {@code FSDirectory} instance
   * @throws IOException if an error
   */
  public static FSDirectory createFSIndex(File indexDir, Properties properties) throws IOException {
    LockFactory lockFactory = createLockFactory(indexDir, properties);
    FSDirectoryType fsDirectoryType = FSDirectoryType.getType(properties);
    FSDirectory fsDirectory = fsDirectoryType.getDirectory(indexDir, null);

    // must use the setter (instead of using the constructor) to set the lockFactory, or Lucene will
    // throw an exception if it's different than a previous setting.
    fsDirectory.setLockFactory(lockFactory);
    log.debug("Initialize index: '{}'", indexDir.getAbsolutePath());
    initializeIndexIfNeeded(fsDirectory);
    return fsDirectory;
  }