@Configuration
public class OpenJPAConfig extends JpaBaseConfiguration {
    protected OpenJPAConfig(DataSource dataSource, JpaProperties properties,
                            ObjectProvider<JtaTransactionManager> jtaTransactionManager,
                            ObjectProvider<TransactionManagerCustomizers> transactionManagerCustomizers) {
        super(dataSource, properties, jtaTransactionManager, transactionManagerCustomizers);
    }

    @Override
    protected AbstractJpaVendorAdapter createJpaVendorAdapter() {
        return new OpenJpaVendorAdapter();
    }
    @Override
    protected Map<String, Object> getVendorProperties() {
        return new HashMap<>(0);
    }
}