internal void RecordModelChange(
EfiChange.EfiChangeType changeType, EFObject changed,
string property, object oldValue, object newValue)
{
switch (changeType)
{
case EfiChange.EfiChangeType.Create:
_creates.Add(new EfiChange(changeType, changed));
break;
case EfiChange.EfiChangeType.Delete:
_deletes.Add(new EfiChange(changeType, changed));
break;
case EfiChange.EfiChangeType.Update:
EfiChange change = null;
if (_updates.ContainsKey(changed))
{
change = _updates[changed];
}
else
{
change = new EfiChange(changeType, changed);
_updates[changed] = change;
}
change.RecordModelChange(property, oldValue, newValue);
break;
}
}
internal void RecordModelChange(
EfiChange.EfiChangeType changeType, EFObject changed,
string property, object oldValue, object newValue)
{
switch (changeType)
{
case EfiChange.EfiChangeType.Create:
_creates.Add(new EfiChange(changeType, changed));
break;
case EfiChange.EfiChangeType.Delete:
_deletes.Add(new EfiChange(changeType, changed));
break;
case EfiChange.EfiChangeType.Update:
EfiChange change = null;
if (_updates.ContainsKey(changed))
{
change = _updates[changed];
}
else
{
change = new EfiChange(changeType, changed);
_updates[changed] = change;
}
change.RecordModelChange(property, oldValue, newValue);
break;
}
}
internal static ModelNodeChangeType GetChangeTypeFromEfiChange(EfiChange c)
{
ModelNodeChangeType t;
switch (c.Type)
{
case EfiChange.EfiChangeType.Create:
t = ModelNodeChangeType.Added;
break;
case EfiChange.EfiChangeType.Delete:
t = ModelNodeChangeType.Deleted;
break;
case EfiChange.EfiChangeType.Update:
t = ModelNodeChangeType.Changed;
break;
default:
Debug.Fail("unexpected type of EfiChangeType");
throw new InvalidOperationException();
}
return t;
}
/// <summary> /// Processes a Create or Delete change. /// </summary> /// <returns> /// true if more model changes should be processed; otherwise, false; /// </returns> protected abstract bool ProcessCreateOrDeleteChange(EditingContext ctx, ModelToExplorerModelXRef xref, EfiChange change);
protected abstract int GetVal(EfiChange change);
public EfiChangeStableSortItem(EfiChange change, int position)
{
_change = change;
_position = position;
}
protected override bool ProcessCreateOrDeleteChange(EditingContext ctx, ModelToExplorerModelXRef xref, EfiChange change)
{
var artifact = change.Changed as EFArtifact;
var conceptualModel = change.Changed as ConceptualEntityModel;
var storageModel = change.Changed as StorageEntityModel;
var mappingModel = change.Changed as MappingModel;
if (null != artifact
||
null != conceptualModel
||
null != storageModel
||
null != mappingModel)
{
// reset the search results - they will no longer be valid
// once the view model is recalculated below
var explorerSearchResults = ExplorerSearchResults.GetExplorerSearchResults(ctx);
explorerSearchResults.Reset();
// reload the UI - the ExplorerViewModelChanged will be fired
// allowing the frame to rebind
CreateViewModel(ctx);
// don't process any more
return false;
}
var efElement = change.Changed as EFElement;
// ExplorerViewModelHelper only needs to process EFElement changes
// (others are DefaultableValue and SingleItemBinding - but
// ExplorerViewModel does not currently need to map these latter)
if (null != efElement)
{
var parent = efElement.Parent as EFElement;
Debug.Assert(
null != parent,
"received changed element of type " + change.Changed.GetType().FullName + " with non-EFElement parent of type "
+ (efElement.Parent == null ? "NULL" : efElement.Parent.GetType().FullName));
if (null != parent)
{
// special case changing of an entity's key
// If we are creating/deleting a Key PropertyRef then we need
// to update the underlying ExplorerProperty
var propRef = efElement as PropertyRef;
var keyElement = efElement as Key;
if (propRef != null)
{
keyElement = propRef.GetParentOfType(typeof(Key)) as Key;
if (keyElement != null
&& null != propRef.Name
&& null != propRef.Name.Target)
{
ExplorerEFElement explorerProp =
xref.GetExisting(propRef.Name.Target) as ExplorerProperty;
if (null != explorerProp)
{
explorerProp.OnModelPropertyChanged(ExplorerEFElement.IsKeyPropertyID);
}
}
}
else if (keyElement != null)
{
// key must be a child of an entity
var et = parent as EntityType;
if (et != null)
{
// the key is being created or completely removed, so sync up every property
foreach (var prop in et.Properties())
{
ExplorerEFElement explorerProp = xref.GetExisting(prop) as ExplorerProperty;
if (null != explorerProp)
{
explorerProp.OnModelPropertyChanged(ExplorerEFElement.IsKeyPropertyID);
}
}
}
}
else
{
// find Explorer node which maps to the model's parent
// this can be null is the ViewModel does not map the
// parent object
if (typeof(FunctionImport) == efElement.GetType())
{
// the FunctionImport Explorer Parent node has been decided to be the ConceptualEntityModel ExplorerEFElement
// rather than the ConceptualEntityContainer one which we would more naturally use to match the model setup
parent = parent.Parent as EFElement;
}
var explorerParentItem = xref.GetExisting(parent);
if (null != explorerParentItem)
{
// now find the Explorer node which should be the new/deleted ViewModel element's parent
// (may not be the same as above due to Explorer ghost nodes)
explorerParentItem = explorerParentItem.GetParentNodeForElement(efElement);
if (EfiChange.EfiChangeType.Create == change.Type)
{
// It's possible that between the Create of a parent and its child
// the Children property is called on the parent which loads the
// child into the parent, even though the child is being added with
// change.Type = Create. For safety, we should remove the existing
// child (if it exists) so as to ensure any changes in the child change
// are reflected.
var explorerEFElement = xref.GetExisting(efElement);
if (explorerEFElement != null)
{
explorerParentItem.RemoveChildIfLoaded(efElement);
}
explorerParentItem.InsertChildIfLoaded(efElement);
}
else
{
explorerParentItem.RemoveChildIfLoaded(efElement);
}
}
}
}
}
return true;
}
/// <summary>
/// Updates corresponding view model item.
/// For simplicity each change updates all item values.
/// </summary>
private void OnEFObjectUpdated(EfiChange change, ModelToDesignerModelXRefItem xref)
{
Debug.Assert(change.Changed != null);
var efObject = change.Changed;
// Updating a base type is a special case, because it really means creating or deleting an inheritance connector
var baseType = efObject as EntityTypeBaseType;
if (baseType != null)
{
if (xref.ContainsKey(baseType.Parent))
{
// always recreate inheritance
OnEFObjectDeleted(baseType, xref);
if (xref.ContainsKey(baseType.Parent))
{
ModelTranslatorContextItem.GetEntityModelTranslator(EditingContext).SynchronizeSingleDslModelElement(this, efObject);
}
}
return;
}
// for AssociationEnd we want to update parent Association
var associationEnd = efObject as AssociationEnd;
if (associationEnd != null)
{
efObject = associationEnd.Parent;
}
// regardless the change always update whole element (it shouldn't be too big overhead)
OnEFObjectCreatedOrUpdated(efObject, xref);
}
protected override int GetVal(EfiChange change)
{
// we always order deletes before creates before updates.
if (change.Type == EfiChange.EfiChangeType.Update)
{
return 100;
}
else if (change.Type == EfiChange.EfiChangeType.Delete)
{
return -1;
}
else
{
Debug.Assert(change.Type == EfiChange.EfiChangeType.Create);
var entityType = change.Changed as Model.Entity.EntityType;
if (entityType != null)
{
return 1;
}
var association = change.Changed as Model.Entity.Association;
if (association != null)
{
return 2;
}
var prop = change.Changed as Model.Entity.Property;
if (prop != null)
{
return 3;
}
var propertyRef = change.Changed as PropertyRef;
if (propertyRef != null)
{
return 4;
}
var key = change.Changed as Key;
if (key != null)
{
return 5;
}
var ets = change.Changed as ModelDesigner.EntityTypeShape;
if (ets != null)
{
return 6;
}
var ac = change.Changed as ModelDesigner.AssociationConnector;
if (ac != null)
{
return 7;
}
var ic = change.Changed as ModelDesigner.InheritanceConnector;
if (ic != null)
{
return 8;
}
return 9;
}
}
/// <summary>
/// Project the Diagram Model changes to DSL Model Elements.
/// Note that this is only to ensure that DSL Model Elements are in sync with the diagram model.
/// </summary>
private void ProcessSingleDiagramModelChange(EfiChange change, HashSet<EFObject> extraElementsToProcess)
{
var diagramObject = change.Changed as ModelDiagram.BaseDiagramObject;
var xref = ModelXRef;
// Ignore if the change is not model diagram object or diagram object does not below to this view model diagram.
if (diagramObject == null
|| diagramObject.Diagram == null
|| diagramObject.Diagram.Id != DiagramId)
{
return;
}
if (change.Type == EfiChange.EfiChangeType.Create)
{
EFObject efObject = null;
var entityTypeShape = change.Changed as ModelDesigner.EntityTypeShape;
var inheritanceConnector = change.Changed as ModelDesigner.InheritanceConnector;
var associationConnector = change.Changed as ModelDesigner.AssociationConnector;
if (entityTypeShape != null)
{
// There is a code above that will Debug.Fail if the object in extraElementsToProcess is not ConceptualEntityType
Model.Entity.EntityType et = entityTypeShape.EntityType.Target as ConceptualEntityType;
if (et != null)
{
extraElementsToProcess.Add(et);
efObject = et;
}
}
else if (inheritanceConnector != null)
{
var et = inheritanceConnector.EntityType.Target as ConceptualEntityType;
if (et != null)
{
efObject = et.BaseType;
}
}
else if (associationConnector != null)
{
efObject = associationConnector.Association.Target;
}
if (efObject != null)
{
OnEFObjectCreatedOrUpdated(efObject, xref);
}
}
else if (change.Type == EfiChange.EfiChangeType.Delete)
{
var entityTypeShape = change.Changed as ModelDesigner.EntityTypeShape;
var inheritanceConnector = change.Changed as ModelDesigner.InheritanceConnector;
var associationConnector = change.Changed as ModelDesigner.AssociationConnector;
EFObject efObject = null;
if (entityTypeShape != null)
{
efObject = entityTypeShape.EntityType.Target;
}
else if (inheritanceConnector != null)
{
var et = inheritanceConnector.EntityType.Target as ConceptualEntityType;
if (et != null)
{
efObject = et.BaseType;
}
}
else if (associationConnector != null)
{
efObject = associationConnector.Association.Target;
}
if (efObject != null)
{
OnEFObjectDeleted(efObject, xref);
}
}
}
private bool ProcessSingleModelChange(EfiChange change)
{
var xref = ModelXRef;
if ((change.Type == EfiChange.EfiChangeType.Create ||
change.Type == EfiChange.EfiChangeType.Delete)
&& (change.Changed is EFArtifact ||
change.Changed is ConceptualEntityModel))
{
// the artifact or model has changed on us, reload the whole thing
ClearAndReloadDiagram();
return true;
}
else
{
try
{
switch (change.Type)
{
case EfiChange.EfiChangeType.Update:
OnEFObjectUpdated(change, xref);
break;
case EfiChange.EfiChangeType.Create:
// Adding association, entity-type or inheritance is no longer translate to the addition of the corresponding DSL model elements.
// We only add the DSL model elements if Escher model diagrams are added (InheritanceConnector etc.)
if (!(change.Changed is Model.Entity.Association
|| change.Changed is ConceptualEntityType
|| change.Changed is EntityTypeBaseType))
{
OnEFObjectUpdated(change, xref);
}
break;
case EfiChange.EfiChangeType.Delete:
OnEFObjectDeleted(change.Changed, xref);
break;
default:
Debug.Assert(false, "Unknown change type.");
break;
}
// If Entity-type's base type has changed, invalidate the shape so the base type name in the shape can be updated.
var baseType = change.Changed as EntityTypeBaseType;
if (baseType != null)
{
Debug.Assert(baseType.Parent != null, "EntityTypeBaseType's Parent should not be null.");
if (baseType.Parent != null)
{
var entityType = ModelXRef.GetExisting(baseType.Parent) as EntityType;
// the entity type is null if it is not in the diagram.
if (entityType != null)
{
var ets = PresentationViewsSubject.GetPresentation(entityType).FirstOrDefault() as EntityTypeShape;
Debug.Assert(ets != null, "The shape for entity-type : " + entityType.Name + " is not available.");
if (ets != null)
{
ets.Invalidate();
}
}
}
}
}
catch (Exception e)
{
Debug.Fail("Exception caught while processing changes to the designer", e.Message);
ClearAndReloadDiagram();
return true;
}
}
return false;
}