Method to restore database of H2 programmatically / in sql

restore.java

    @Transactional
    public Boolean restore(String filename, TimeUnit timeUnit, Integer during) {

        Path restoreFile = backup.getLocation().resolve(filename);

        if (!Files.exists(restoreFile))
            return Boolean.FALSE;

        log.info("Full database reset");
        em.createNativeQuery("DROP ALL OBJECTS;").executeUpdate();

        Try.run(() -> timeUnit.sleep(during));

        log.info("Full database restore");
        em.createNativeQuery("RUNSCRIPT FROM '"+ restoreFile.toAbsolutePath().toString() +"'").executeUpdate();

        return Boolean.TRUE;
    }