internal void Validate(Activity owner, ref IList <ValidationError> validationErrors)
{
if (this.Expression != null)
{
if (this.Expression.Result != null && !this.Expression.Result.IsEmpty)
{
ValidationError validationError = new ValidationError(SR.ResultCannotBeSetOnArgumentExpressions, false, this.RuntimeArgument.Name, owner);
ActivityUtilities.Add(ref validationErrors, validationError);
}
ActivityWithResult actualExpression = this.Expression;
if (actualExpression is IExpressionWrapper)
{
actualExpression = ((IExpressionWrapper)actualExpression).InnerExpression;
}
switch (this.Direction)
{
case ArgumentDirection.In:
if (actualExpression.ResultType != this.ArgumentType)
{
ActivityUtilities.Add(
ref validationErrors,
new ValidationError(SR.ArgumentValueExpressionTypeMismatch(this.ArgumentType, actualExpression.ResultType), false, this.RuntimeArgument.Name, owner));
}
break;
case ArgumentDirection.InOut:
case ArgumentDirection.Out:
Type locationType;
if (!ActivityUtilities.IsLocationGenericType(actualExpression.ResultType, out locationType) ||
locationType != this.ArgumentType)
{
Type expectedType = ActivityUtilities.CreateActivityWithResult(ActivityUtilities.CreateLocation(this.ArgumentType));
ActivityUtilities.Add(
ref validationErrors,
new ValidationError(SR.ArgumentLocationExpressionTypeMismatch(expectedType.FullName, actualExpression.GetType().FullName), false, this.RuntimeArgument.Name, owner));
}
break;
}
}
}