internal override void CreateModelItem(CommandProcessorContext cpc, EditingContext context, EFElement underlyingModelItem)
{
Debug.Assert(context != null, "null context");
Debug.Assert(Function == null, "Don't call this method if we already have a ModelItem");
Debug.Assert(MappingFunctionEntityType.EntityType != null, "The parent item isn't set up correctly");
Debug.Assert(underlyingModelItem != null, "null underlyingModelItem");
var function = underlyingModelItem as Function;
Debug.Assert(
function != null, "underlyingModelItem must be of type Function, actual type = " + underlyingModelItem.GetType().FullName);
Debug.Assert(!function.EntityModel.IsCSDL, "The function must be in the SSDL");
Context = context;
// create a context if we weren't passed one
if (cpc == null)
{
cpc = new CommandProcessorContext(
Context, EfiTransactionOriginator.MappingDetailsOriginatorId, Resources.Tx_CreateFunctionMapping);
}
// create the commands
var cmd = new CreateFunctionMappingCommand(MappingFunctionEntityType.EntityType, function, null, _functionType);
// set up our post event to fix up the view model
cmd.PostInvokeEvent += (o, eventsArgs) =>
{
var mf = cmd.ModificationFunction;
Debug.Assert(mf != null, "null ModificationFunction");
// fix up our view model
ModelItem = mf;
// The parent item for the function mapping view model always has 3 children; insert, update and delete items. If there isn’t
// a function mapped for any of these, then there is still a view model item since we want to display the ‘creator node’ text.
// Calling this.Parent.AddChild(this) here would make the parent think it had a new child instead of updating the existing one -
// so it is correct to _not_ call it here.
};
var cmd2 = new DelegateCommand(
() =>
{
var mf = ModificationFunction;
Debug.Assert(
mf != null,
"Null ModificationFunction when trying to create view-model dummy nodes in MappingModificationFunctionMapping.CreateModelItem()");
if (mf != null)
{
//set up _properties and _resultBindings here as they are dummy ViewModel nodes
// (i.e. don't correspond to any underlying ModelItem)
_properties = new MappingFunctionScalarProperties(context, mf, this);
_resultBindings = new MappingResultBindings(context, mf, this);
_properties.Parent.AddChild(_properties);
_resultBindings.Parent.AddChild(_resultBindings);
// now ensure _properties scalar properties children have been calculated
// (this creates scalar properties with just the column info
// since this ModificationFunction has not yet been mapped)
_properties.LoadScalarProperties();
// now try and do some match ups between the function and the entity
var mappedEntityType = MappingFunctionEntityType.EntityType as ConceptualEntityType;
Debug.Assert(
MappingFunctionEntityType.EntityType == null || mappedEntityType != null,
"EntityType is not ConceptualEntityType");
if (mappedEntityType != null)
{
foreach (var mfsp in _properties.ScalarProperties)
{
// Try to do some auto-matching of the sproc's parameters to the EntityType's properties.
// Search for a property in the mapped EntityType's inheritance hierarchy that matches the
// parameter's name. First search this EntityType (both its scalar and complex properties),
// then search its parents scalar and complex properties and so on up the hierarchy
var propNameToSearchFor = mfsp.StoreParameter.LocalName.Value;
var propList = new List<Property>();
var entityTypeToSearch = mappedEntityType;
// reset this back to the mapped EntityType each time through the loop
while (entityTypeToSearch != null
&& false
== ModelHelper.FindScalarPropertyPathByLocalName(
entityTypeToSearch, propNameToSearchFor, out propList))
{
if (entityTypeToSearch.BaseType == null)
{
// safety code - this should not happen but will prevent an infinite loop if it does
entityTypeToSearch = null;
}
else
{
entityTypeToSearch = entityTypeToSearch.BaseType.Target;
}
}
// if propList is still empty that means we did not find a match - so leave the parameter unmapped
if (propList.Count > 0)
{
mfsp.CreateModelItem(cpc, _context, propList);
}
}
}
}
});
try
{
// now make the change
var cp = new CommandProcessor(cpc);
cp.EnqueueCommand(cmd);
cp.EnqueueCommand(cmd2);
cp.Invoke();
}
catch
{
ModelItem = null;
ClearChildren();
throw;
}
}
// <summary>
// NOTE: The association set mapping view model doesn't keep a reference to the mapping model item. Instead, it
// keeps it to the AssociationSet and then it can find the AssociationSetMapping as an anti-dep. We don't need to clear
// or set the ModelItem property.
// </summary>
internal override void CreateModelItem(CommandProcessorContext cpc, EditingContext context, EFElement underlyingModelItem)
{
Debug.Assert(context != null, "The context argument cannot be null");
Debug.Assert(AssociationSet.AssociationSetMapping == null, "Don't call this method if we already have a mapping");
Debug.Assert(underlyingModelItem != null, "The underlyingModelItem cannot be null");
var storeEntityType = underlyingModelItem as EntityType;
Debug.Assert(
storeEntityType != null,
"underlyingModelItem must be of type EntityType, actual type = " + underlyingModelItem.GetType().FullName);
Debug.Assert(!storeEntityType.EntityModel.IsCSDL, "The storageEntityType must not be a CSDL EntityType");
Context = context;
// create a context if we weren't passed one
if (cpc == null)
{
cpc = new CommandProcessorContext(
Context, EfiTransactionOriginator.MappingDetailsOriginatorId, Resources.Tx_CreateAssociationSetMapping);
}
// create the item
var cmd1 = new CreateAssociationSetMappingCommand(MappingAssociation.Association, storeEntityType);
// now try and do some match ups by name
var cmd2 = new DelegateCommand(
() =>
{
Parent.AddChild(this);
foreach (var child in Children)
{
var end = child as MappingAssociationSetEnd;
if (end != null)
{
foreach (var child2 in end.Children)
{
var mesp = child2 as MappingEndScalarProperty;
if (mesp != null)
{
var tableColumn =
MappingAssociationSet.StorageEntityType.GetFirstNamedChildByLocalName(mesp.Property, true) as
Property;
if (tableColumn != null)
{
mesp.CreateModelItem(cpc, _context, tableColumn);
}
}
}
}
}
});
// now make the change
var cp = new CommandProcessor(cpc);
cp.EnqueueCommand(cmd1);
cp.EnqueueCommand(cmd2);
cp.Invoke();
}
