private static bool TryMatchEntityTypeConstructor(DbExpression then,
Dictionary<EdmProperty, DbExpression> propertyMap,
Dictionary<Query.InternalTrees.RelProperty, DbExpression> relPropertyMap,
Dictionary<EntityType, List<Query.InternalTrees.RelProperty>> typeToRelPropertyMap,
out EntityType entityType)
{
if (then.ExpressionKind != DbExpressionKind.NewInstance)
{
entityType = null;
return false;
}
var constructor = (DbNewInstanceExpression)then;
entityType = (EntityType)constructor.ResultType.EdmType;
// process arguments to constructor (must be aligned across all case statements)
Debug.Assert(entityType.Properties.Count == constructor.Arguments.Count, "invalid new instance");
for (int j = 0; j < entityType.Properties.Count; j++)
{
var property = entityType.Properties[j];
var assignment = constructor.Arguments[j];
DbExpression existingAssignment;
if (propertyMap.TryGetValue(property, out existingAssignment))
{
if (!ExpressionsCompatible(assignment, existingAssignment)) { return false; }
}
else
{
propertyMap.Add(property, assignment);
}
}
// Now handle the rel properties
if (constructor.HasRelatedEntityReferences)
{
List<Query.InternalTrees.RelProperty> relPropertyList;
if (!typeToRelPropertyMap.TryGetValue(entityType, out relPropertyList))
{
relPropertyList = new List<System.Data.Query.InternalTrees.RelProperty>();
typeToRelPropertyMap[entityType] = relPropertyList;
}
foreach (DbRelatedEntityRef relatedRef in constructor.RelatedEntityReferences)
{
Query.InternalTrees.RelProperty relProperty = new System.Data.Query.InternalTrees.RelProperty((RelationshipType)relatedRef.TargetEnd.DeclaringType,
relatedRef.SourceEnd, relatedRef.TargetEnd);
DbExpression assignment = relatedRef.TargetEntityReference;
DbExpression existingAssignment;
if (relPropertyMap.TryGetValue(relProperty, out existingAssignment))
{
if (!ExpressionsCompatible(assignment, existingAssignment)) { return false; }
}
else
{
relPropertyMap.Add(relProperty, assignment);
}
relPropertyList.Add(relProperty);
}
}
return true;
}
private static bool TryMatchEntityTypeConstructor(DbExpression then,
Dictionary <EdmProperty, DbExpression> propertyMap,
Dictionary <Query.InternalTrees.RelProperty, DbExpression> relPropertyMap,
Dictionary <EntityType, List <Query.InternalTrees.RelProperty> > typeToRelPropertyMap,
out EntityType entityType)
{
if (then.ExpressionKind != DbExpressionKind.NewInstance)
{
entityType = null;
return(false);
}
var constructor = (DbNewInstanceExpression)then;
entityType = (EntityType)constructor.ResultType.EdmType;
// process arguments to constructor (must be aligned across all case statements)
Debug.Assert(entityType.Properties.Count == constructor.Arguments.Count, "invalid new instance");
for (int j = 0; j < entityType.Properties.Count; j++)
{
var property = entityType.Properties[j];
var assignment = constructor.Arguments[j];
DbExpression existingAssignment;
if (propertyMap.TryGetValue(property, out existingAssignment))
{
if (!ExpressionsCompatible(assignment, existingAssignment))
{
return(false);
}
}
else
{
propertyMap.Add(property, assignment);
}
}
// Now handle the rel properties
if (constructor.HasRelatedEntityReferences)
{
List <Query.InternalTrees.RelProperty> relPropertyList;
if (!typeToRelPropertyMap.TryGetValue(entityType, out relPropertyList))
{
relPropertyList = new List <System.Data.Query.InternalTrees.RelProperty>();
typeToRelPropertyMap[entityType] = relPropertyList;
}
foreach (DbRelatedEntityRef relatedRef in constructor.RelatedEntityReferences)
{
Query.InternalTrees.RelProperty relProperty = new System.Data.Query.InternalTrees.RelProperty((RelationshipType)relatedRef.TargetEnd.DeclaringType,
relatedRef.SourceEnd, relatedRef.TargetEnd);
DbExpression assignment = relatedRef.TargetEntityReference;
DbExpression existingAssignment;
if (relPropertyMap.TryGetValue(relProperty, out existingAssignment))
{
if (!ExpressionsCompatible(assignment, existingAssignment))
{
return(false);
}
}
else
{
relPropertyMap.Add(relProperty, assignment);
}
relPropertyList.Add(relProperty);
}
}
return(true);
}
