internal override void RetrieveReferentialConstraintProperties(
Dictionary <string, KeyValuePair <object, IntBox> > properties,
HashSet <object> visited)
{
if (this._wrappedCachedValue.Entity == null)
{
return;
}
foreach (ReferentialConstraint referentialConstraint in ((AssociationType)this.RelationMetadata).ReferentialConstraints)
{
if (referentialConstraint.ToRole == this.FromEndMember)
{
if (visited.Contains((object)this._wrappedCachedValue))
{
throw new InvalidOperationException(Strings.RelationshipManager_CircularRelationshipsWithReferentialConstraints);
}
visited.Add((object)this._wrappedCachedValue);
Dictionary <string, KeyValuePair <object, IntBox> > properties1;
this._wrappedCachedValue.RelationshipManager.RetrieveReferentialConstraintProperties(out properties1, visited, true);
for (int index = 0; index < referentialConstraint.FromProperties.Count; ++index)
{
EntityEntry.AddOrIncreaseCounter(referentialConstraint, properties, referentialConstraint.ToProperties[index].Name, properties1[referentialConstraint.FromProperties[index].Name].Key);
}
}
}
}
// Method used to retrieve properties from principal entities.
// NOTE: 'properties' list is modified in this method and may already contains some properties.
internal override void RetrieveReferentialConstraintProperties(
Dictionary <string, KeyValuePair <object, IntBox> > properties, HashSet <object> visited)
{
DebugCheck.NotNull(properties);
if (_wrappedCachedValue.Entity != null)
{
// Dictionary< propertyName, <propertyValue, counter>>
Dictionary <string, KeyValuePair <object, IntBox> > retrievedProperties;
// PERFORMANCE: ReferentialConstraints collection in typical scenario is very small (1-3 elements)
foreach (var constraint in ((AssociationType)RelationMetadata).ReferentialConstraints)
{
if (constraint.ToRole == FromEndMember)
{
// Detect circular references
if (visited.Contains(_wrappedCachedValue))
{
throw new InvalidOperationException(Strings.RelationshipManager_CircularRelationshipsWithReferentialConstraints);
}
visited.Add(_wrappedCachedValue);
_wrappedCachedValue.RelationshipManager.RetrieveReferentialConstraintProperties(
out retrievedProperties, visited, includeOwnValues: true);
Debug.Assert(retrievedProperties != null);
Debug.Assert(
constraint.FromProperties.Count == constraint.ToProperties.Count,
"Referential constraints From/To properties list have different size");
// Following loop rewrites properties from "retrievedProperties" into "properties".
// At the same time, property's name is translated from name from principal end into name from dependent end:
// Example: Client<C_ID> - Order<O_ID, Client_ID>
// Client is principal end, Order is dependent end, Client.C_ID == Order.Client_ID
// Input : retrievedProperties = { "C_ID" = 123 }
// Output: properties = { "Client_ID" = 123 }
// NOTE order of properties in collections constraint.From/ToProperties is important
for (var i = 0; i < constraint.FromProperties.Count; ++i)
{
EntityEntry.AddOrIncreaseCounter(
constraint,
properties,
constraint.ToProperties[i].Name,
retrievedProperties[constraint.FromProperties[i].Name].Key);
}
}
}
}
}
