return properties;
    }

    private class Initializer implements CacheInitializationAction {
        @Override
        public boolean requiresInitialization(FileLock lock) {
            if (!lock.getUnlockedCleanly()) {
                if (lock.getState().canDetectChanges() && !lock.getState().isInInitialState()) {
                    LOGGER.warn("Invalidating {} as it was not closed cleanly.", DefaultPersistentDirectoryCache.this);

        }

        @Override
        public boolean isLockFile(File file) {
            return file.equals(lockFile);
        }

        @Override
        public boolean getUnlockedCleanly() {
            assertOpen();
            return !lockState.isDirty();
        }

        @Override
        public State getState() {
            assertOpen();
            return lockState;