package com.myfarmer.provman.service; import java.util.List; import com.myfarmer.provman.model.Provider; public interface ProviderService { Provider findById(int id); void saveProvider(Provider provider); void updateProvider(Provider provider); void deleteProviderByCode(String code); List findAllProviders(); Provider findProviderByCode(String code); boolean isProviderCodeUnique(Integer id, String code); }