Base Service Java

---

package in.abhi8290.helloworld.core.base;  
  
import org.springframework.data.jpa.repository.JpaRepository;  
  
import java.util.List;  
import java.util.Optional;  
  
public abstract class BaseService<T, ID> {  
  
    protected abstract JpaRepository<T, ID> getRepository();  
  
    public T save(T entity) {  
        return getRepository().save(entity);  
    }  
  
    public Optional<T> findById(ID id) {  
        return getRepository().findById(id);  
    }  
  
    public List<T> findAll() {  
        return getRepository().findAll();  
    }  
  
    public T update(ID id, T updatedEntity) {  
        if (!getRepository().existsById(id)) {  
            throw new RuntimeException("Entity not found with ID: " + id);  
        }  
        return getRepository().save(updatedEntity);  
    }  
  
    public void deleteById(ID id) {  
        getRepository().deleteById(id);  
    }  
  
    public boolean existsById(ID id) {  
        return getRepository().existsById(id);  
    }  
}

Still tricky But let’s say this is day 1