package com.example.demo.service.ServiceImpl; import com.example.demo.model.PaymentType; import com.example.demo.repository.PaymentTypeRepository; import com.example.demo.service.PaymentTypeService; import org.springframework.stereotype.Service; import java.util.Optional; @Service public class PaymentTypeServiceImpl implements PaymentTypeService { private final PaymentTypeRepository paymentTypeRepository; public PaymentTypeServiceImpl(PaymentTypeRepository paymentTypeRepository) { this.paymentTypeRepository = paymentTypeRepository; } @Override public Optional findById(Integer payment_type_id) { return this.paymentTypeRepository.findById(payment_type_id); } }