UserService.java

package edu.gatech.epidemics.service;

import edu.gatech.epidemics.dao.UserRepository;
import edu.gatech.epidemics.model.User;
import javax.transaction.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.*;

/**
 * @author atalati
 */
@Service
public class UserService {
	@Autowired
	private final UserRepository userRepository;
	public UserService(UserRepository userRepository) {
		this.userRepository = userRepository;
	}
	public List<User> findAll() {
		List<User> users = new ArrayList<User>();
		userRepository.findAll().forEach(users::add);
		return users;
	}
	public User findById(Integer id) {
		Optional<User> user = userRepository.findById(id);
		if (user.isPresent()) {
			return user.get();
		} else {
			return null;
		}
	}
}