/*
 * Created on 12/Nov/2004
 *
 */
package net.sourceforge.fenixedu.applicationTier.Servico.teacher;

import net.sourceforge.fenixedu.applicationTier.FenixService;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.ExistingServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.InvalidArgumentsServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.InvalidChangeServiceException;
import net.sourceforge.fenixedu.domain.Grouping;
import net.sourceforge.fenixedu.domain.Shift;
import net.sourceforge.fenixedu.domain.StudentGroup;

/**
 * @author joaosa and rmalo
 * 
 */

public class UnEnrollStudentGroupShift extends FenixService {

    public Boolean run(Integer executionCourseCode, Integer studentGroupCode, Integer groupPropertiesCode)
	    throws FenixServiceException {

	Grouping groupProperties = rootDomainObject.readGroupingByOID(groupPropertiesCode);

	if (groupProperties == null) {
	    throw new ExistingServiceException();
	}

	StudentGroup studentGroup = rootDomainObject.readStudentGroupByOID(studentGroupCode);

	if (studentGroup == null) {
	    throw new InvalidArgumentsServiceException();
	}

	if (!(studentGroup.getShift() != null && groupProperties.getShiftType() == null) || studentGroup.getShift() == null) {
	    throw new InvalidChangeServiceException();
	}

	Shift shift = null;
	studentGroup.setShift(shift);

	return Boolean.valueOf(true);
    }
}