/// <summary> Gets a scalar value, calculated with the aggregate and expression specified. the field index specified is the field the expression and aggregate are applied on.</summary>
/// <param name="fieldIndex">Field index of field to which to apply the aggregate function and expression</param>
/// <param name="expressionToExecute">The expression to execute. Can be null</param>
/// <param name="aggregateToApply">Aggregate function to apply. </param>
/// <param name="filter">The filter to apply to retrieve the scalar</param>
/// <param name="relations">The relations to walk</param>
/// <param name="groupByClause">The groupby clause to apply to retrieve the scalar</param>
/// <returns>the scalar value requested</returns>
public virtual object GetScalar(MobileDeviceFieldIndex fieldIndex, IExpression expressionToExecute, AggregateFunction aggregateToApply, IPredicate filter, IRelationCollection relations, IGroupByCollection groupByClause)
{
EntityFields fields = new EntityFields(1);
fields[0] = EntityFieldFactory.Create(fieldIndex);
if ((fields[0].ExpressionToApply == null) || (expressionToExecute != null))
{
fields[0].ExpressionToApply = expressionToExecute;
}
if ((fields[0].AggregateFunctionToApply == AggregateFunction.None) || (aggregateToApply != AggregateFunction.None))
{
fields[0].AggregateFunctionToApply = aggregateToApply;
}
MobileDeviceDAO dao = DAOFactory.CreateMobileDeviceDAO();
return(dao.GetScalar(fields, base.Transaction, filter, relations, groupByClause));
}
/// <summary> Retrieves Entity rows in a datatable which match the specified filter. It will always create a new connection to the database.</summary>
/// <param name="selectFilter">A predicate or predicate expression which should be used as filter for the entities to retrieve.</param>
/// <param name="maxNumberOfItemsToReturn"> The maximum number of items to return with this retrieval query.</param>
/// <param name="sortClauses">The order by specifications for the sorting of the resultset. When not specified, no sorting is applied.</param>
/// <param name="relations">The set of relations to walk to construct to total query.</param>
/// <param name="pageNumber">The page number to retrieve.</param>
/// <param name="pageSize">The page size of the page to retrieve.</param>
/// <returns>DataTable with the rows requested.</returns>
public static DataTable GetMultiAsDataTable(IPredicate selectFilter, long maxNumberOfItemsToReturn, ISortExpression sortClauses, IRelationCollection relations, int pageNumber, int pageSize)
{
MobileDeviceDAO dao = DAOFactory.CreateMobileDeviceDAO();
return(dao.GetMultiAsDataTable(maxNumberOfItemsToReturn, sortClauses, selectFilter, relations, pageNumber, pageSize));
}
/// <summary> Performs the update action of an existing Entity to the persistent storage.</summary>
/// <param name="updateRestriction">Predicate expression, meant for concurrency checks in an Update query</param>
/// <returns>true if succeeded, false otherwise</returns>
protected override bool UpdateEntity(IPredicate updateRestriction)
{
MobileDeviceDAO dao = (MobileDeviceDAO)CreateDAOInstance();
return(dao.UpdateExisting(base.Fields, base.Transaction, updateRestriction));
}
/// <summary> Performs the insert action of a new Entity to the persistent storage.</summary>
/// <returns>true if succeeded, false otherwise</returns>
protected override bool InsertEntity()
{
MobileDeviceDAO dao = (MobileDeviceDAO)CreateDAOInstance();
return(dao.AddNew(base.Fields, base.Transaction));
}
