package at.ac.tuwien.sepm.assignment.groupphase.missioncontrol.dao;

import at.ac.tuwien.sepm.assignment.groupphase.exception.ElementNotFoundException;
import at.ac.tuwien.sepm.assignment.groupphase.exception.PersistenceException;
import at.ac.tuwien.sepm.assignment.groupphase.missioncontrol.dto.Employee;
import java.util.Set;

public interface EmployeeDAO {

    /**
     * Persist the given employee.
     *
     * @param employee that should be stored
     * @return the id that was assigned
     * @throws PersistenceException if the employee could not be persisted
     */
    long add(Employee employee) throws PersistenceException;

    /**
     * Update the given employee.
     *
     * @param employee that should be updated
     * @throws ElementNotFoundException if no employee with the given id exists
     * @throws PersistenceException if the employee could not be updated
     */
    void update(Employee employee) throws ElementNotFoundException, PersistenceException;

    /**
     * Get all stored employees.
     *
     * @return list containing all stored employees
     * @throws PersistenceException if loading the stored employees failed
     */
    Set<Employee> list() throws PersistenceException;

    /**
     * Remove employee with the given id from the store.
     *
     * @param id of the employee that should be removed
     * @throws ElementNotFoundException if no employee with the given id exists
     * @throws PersistenceException if the employee could not be removed
     */
    void remove(long id) throws ElementNotFoundException, PersistenceException;
}