/// <summary>
/// Gets the creation expression used to produce a <see cref="TypeRegistration"/> during
/// <see cref="TraceListenerData.GetRegistrations"/>.
/// </summary>
/// <remarks>
/// This must be overridden by a subclass, but is not marked as abstract due to configuration serialization needs.
/// </remarks>
/// <returns>A <see cref="Expression"/> that creates a <see cref="TraceListener"/></returns>
/// <exception cref="ArgumentException">Throws an argument exception if it cannot locate an appropriate constructor for the <see cref="NameTypeConfigurationElement.Type"/>.</exception>
protected override Expression <Func <TraceListener> > GetCreationExpression()
{
Expression <Func <TraceListener> > expression;
Type[] constructorParameters = new Type[0];
Expression[] expressionArguments = new Expression[0];
if (!string.IsNullOrEmpty(InitData))
{
constructorParameters = new Type[] { InitData.GetType() };
expressionArguments = new Expression[] { Expression.Constant(InitData) };
}
ConstructorInfo constructor = GetConstructor(constructorParameters);
expression =
Expression.Lambda <Func <TraceListener> >(
Expression.New(
constructor,
expressionArguments)
);
return(expression);
}
