Method open

src/main/java/gate/persist/SerialDataStore.java:316–346

Open a connection to the data store.

()

  /** Open a connection to the data store. */
  @Override
  public void open() throws PersistenceException {
    if(storageDir == null)
      throw new PersistenceException("Can't open: storage dir is null");

    // check storage directory is readable
    if(! storageDir.canRead()) {
      throw new PersistenceException("Can't read " + storageDir);
    }

    // check storage directory is a valid serial datastore
// if we want to support old style:
// String versionInVersionFile = "1.0";
// (but this means it will open *any* directory)
    try {
      FileReader fis = new FileReader(getVersionFile());
      BufferedReader isr = new BufferedReader(fis);
      currentProtocolVersion = isr.readLine();
      if(DEBUG) Out.prln("opening SDS version " + currentProtocolVersion);
      isr.close();
    } catch(IOException e) {
      throw new PersistenceException(
        "Invalid storage directory: " + e
      );
    }
    if(! isValidProtocolVersion(currentProtocolVersion))
      throw new PersistenceException(
        "Invalid protocol version number: " + currentProtocolVersion
      );

  } // open()

  /** Close the data store. */
  @Override