/// <summary>
/// Translate model NavigationProperty into view NavigationProperty (creates a view NavigationProperty if not yet created)
/// </summary>
private ViewModelNavigationProperty TranslateNavigationProperty(ViewModelEntityType viewEntityType, ModelNavigationProperty navProp)
{
var viewNavProp =
ModelToDesignerModelXRef.GetNewOrExisting(EditingContext, navProp, viewEntityType.Partition) as ViewModelNavigationProperty;
Debug.Assert(viewNavProp != null, "Expected non-null navigation property");
viewNavProp.Name = navProp.LocalName.Value;
if (navProp.Relationship.Status == BindingStatus.Known)
{
var association =
ModelToDesignerModelXRef.GetExisting(EditingContext, navProp.Relationship.Target, viewEntityType.Partition) as
ViewModelAssociation;
// Association might be null here if the related entity does not exist in the current diagram.
if (association != null)
{
viewNavProp.Association = association;
// On a self-relationship case, we ensure that the Source and Target NavProps are not set with the same value.
// The source is set first only if SourceEntity == TargetEntityType and the Source navprop has not been set yet. The other case would be
// if this is not a self-relationship.
if (viewEntityType == association.SourceEntityType &&
((association.SourceEntityType == association.TargetEntityType && association.SourceNavigationProperty == null) ||
(association.SourceEntityType != association.TargetEntityType)))
{
association.SourceNavigationProperty = viewNavProp;
}
// SourceEntityType might be the same as TargetEntityType, so we need to check this as well
if (viewEntityType == association.TargetEntityType)
{
association.TargetNavigationProperty = viewNavProp;
}
}
}
return(viewNavProp);
}
/// <summary>
/// Translate model NavigationProperty into view NavigationProperty (creates a view NavigationProperty if not yet created)
/// </summary>
private ViewModelNavigationProperty TranslateNavigationProperty(ViewModelEntityType viewEntityType, ModelNavigationProperty navProp)
{
var viewNavProp =
ModelToDesignerModelXRef.GetNewOrExisting(EditingContext, navProp, viewEntityType.Partition) as ViewModelNavigationProperty;
Debug.Assert(viewNavProp != null, "Expected non-null navigation property");
viewNavProp.Name = navProp.LocalName.Value;
if (navProp.Relationship.Status == BindingStatus.Known)
{
var association =
ModelToDesignerModelXRef.GetExisting(EditingContext, navProp.Relationship.Target, viewEntityType.Partition) as
ViewModelAssociation;
// Association might be null here if the related entity does not exist in the current diagram.
if (association != null)
{
viewNavProp.Association = association;
// On a self-relationship case, we ensure that the Source and Target NavProps are not set with the same value.
// The source is set first only if SourceEntity == TargetEntityType and the Source navprop has not been set yet. The other case would be
// if this is not a self-relationship.
if (viewEntityType == association.SourceEntityType
&& ((association.SourceEntityType == association.TargetEntityType && association.SourceNavigationProperty == null)
|| (association.SourceEntityType != association.TargetEntityType)))
{
association.SourceNavigationProperty = viewNavProp;
}
// SourceEntityType might be the same as TargetEntityType, so we need to check this as well
if (viewEntityType == association.TargetEntityType)
{
association.TargetNavigationProperty = viewNavProp;
}
}
}
return viewNavProp;
}