/*
 * Created on 17/Ago/2003
 *
 */
package net.sourceforge.fenixedu.applicationTier.Servico.teacher;

import java.util.ArrayList;
import java.util.List;

import net.sourceforge.fenixedu.applicationTier.FenixService;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.InvalidArgumentsServiceException;
import net.sourceforge.fenixedu.dataTransferObject.InfoStudent;
import net.sourceforge.fenixedu.domain.Attends;
import net.sourceforge.fenixedu.domain.StudentGroup;

/**
 * @author asnr and scpo
 * 
 */

public class PrepareEditStudentGroupMembers extends FenixService {

    public List run(Integer executionCourseID, Integer studentGroupID) throws FenixServiceException {
	final StudentGroup studentGroup = rootDomainObject.readStudentGroupByOID(studentGroupID);
	if (studentGroup == null) {
	    throw new InvalidArgumentsServiceException();
	}

	final List<Attends> groupingAttends = new ArrayList<Attends>();
	groupingAttends.addAll(studentGroup.getGrouping().getAttends());
	;

	final List<StudentGroup> studentsGroups = studentGroup.getGrouping().getStudentGroups();
	for (final StudentGroup studentGroupIter : studentsGroups) {
	    for (final Attends attend : studentGroupIter.getAttends()) {
		groupingAttends.remove(attend);
	    }
	}
	final List<InfoStudent> infoStudents = new ArrayList<InfoStudent>();
	for (final Attends attend : groupingAttends) {
	    infoStudents.add(InfoStudent.newInfoFromDomain(attend.getRegistration()));
	}
	return infoStudents;
    }

}