/// <summary>
/// Selects the specified "item" from the esper query.
/// </summary>
/// <typeparam name="T1">The type of the 1.</typeparam>
/// <typeparam name="T2">The type of the 2.</typeparam>
/// <param name="esperQuery">The esper query.</param>
/// <param name="expression">The expression.</param>
/// <returns></returns>
public static DisposableObservableCollection <T2> Select <T1, T2>(this EsperQuery <T1> esperQuery, Expression <Func <T1, T2> > expression)
{
var transform = expression.Compile();
esperQuery.Compile();
if (typeof(T1) == typeof(T2))
{
return(esperQuery.Statement.AsObservableCollection <T2>(true));
}
return(new CascadeObservableCollection <T1, T2>(
esperQuery.Statement.AsObservableCollection <T1>(true),
transform,
true));
}
/// <summary>
/// Selects the specified "item" from the esper query.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="esperQuery">The esper query.</param>
/// <returns></returns>
public static DisposableObservableCollection <T> Select <T>(this EsperQuery <T> esperQuery)
{
esperQuery.Compile();
return(esperQuery.Statement.AsObservableCollection <T>(true));
}