/// <summary>
/// Translates an activity instance.
/// </summary>
/// <param name="modelItem">The ModelItem object representing the activity instance.</param>
/// <returns>The translated result.</returns>
public string Translate(ModelItem modelItem)
{
if (modelItem == null)
{
return(Constants.EmptyTextDisplay);
}
ModelItem activityItem = modelItem.GetActivityItem();
if (null == activityItem)
{
return(Constants.EmptyTextDisplay);
}
Type genericType = activityItem.GetGenericType();
ActivityTranslateItem m = (from a in _activityTranslateItem
where a.Key == genericType
select a.Value).FirstOrDefault();
if (m == null)
{
// Use fallback translation item to prevent the app from crashing.
m = FallbackTranslateItem;
}
return(m(this, activityItem));
}
/// <summary>
/// Gets ModelItem object representing an Activity object, from InArgument.Expression property
/// if given ModelItem object represents an InArgument object.
/// </summary>
/// <param name="item">The given ModelItem object that might represent an InArgument object.</param>
/// <returns>The ModelItem object retrieved from InArgument.Expression if the given parameter represents an InArgument object;
/// otherwise, the given parameter itself.</returns>
public static ModelItem GetActivityItem(this ModelItem item)
{
Type genericType = item.GetGenericType();
if (typeof(InArgument).IsAssignableFrom(genericType))
{
ModelProperty exprProp = item.Properties[Constants.ExpressionPropertyName];
if (exprProp != null)
{
return(exprProp.Value);
}
else
{
return(null);
}
}
return(item);
}