/**
* 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;
}