public bool TryReplaceArgument(ModelTreeManager modelTreeManager, ValidationService validationService)
{
Fx.Assert(modelTreeManager != null, "modelTreeManager cannot be null.");
Fx.Assert(validationService != null, "validationService cannot be null.");
ModelItem expressionModelItem = modelTreeManager.GetModelItem(this.ExpressionToReplace);
if (expressionModelItem != null)
{
ModelItem argumentModelItem = expressionModelItem.Parent;
ModelItem parentObject = argumentModelItem.Parent;
if (argumentModelItem.Source != null)
{
ModelProperty argumentProperty = parentObject.Properties[argumentModelItem.Source.Name];
Type argumentPropertyType = argumentProperty.PropertyType;
if (argumentPropertyType == typeof(InArgument) || argumentPropertyType == typeof(OutArgument) || argumentPropertyType == typeof(InOutArgument))
{
ModelItem oldArgumentModel = argumentProperty.Value;
ModelItem newArgumentModel = argumentProperty.SetValue(this.NewArgument);
// Make sure argument.Expression is wrapped in ModelItem as well
ModelItem newExpressionModel = newArgumentModel.Properties["Expression"].Value;
return true;
}
}
}
else
{
Activity parentActivity = ValidationService.GetParent(this.ExpressionToReplace);
if (this.ArgumentAccessor.Setter != null)
{
try
{
validationService.DeactivateValidation();
this.ArgumentAccessor.Setter(parentActivity, this.NewArgument);
return true;
}
finally
{
validationService.ActivateValidation();
}
}
}
return false;
}
