Dynamics AX Codes

in Ax 2009, to get a list of companies by user i get it of this way:

static container getAllCompanies()
{
     Container companies;
     DataArea dataArea;
     CompanyDomainList companyDomainList;
     AccessRightsList  accessRightsList;
    UserGroupList        userGroupList;


//select all the companies in which current user’s access level is higer than NoAccess
     while select id,name from DataArea
           Exists join companyDomainList
           where companyDomainList.companyId == dataArea.Id
           join accessRightsList
           where accessRightsList.domainId   ==  companyDomainList.domainId && accessRightsList.accessType > AccessType::NoAccess
           join userGroupList
           where userGroupList.groupId       == accessRightsList.groupId && userGroupList.userId == curuserid()
     {
          companies += [dataArea.name,dataArea.Id];
     }

     return companies;
}