internal override FunctionUpdateCommand Translate(
UpdateTranslator translator,
ExtractedStateEntry stateEntry)
{
var mapping = GetFunctionMapping(stateEntry);
StorageEntityTypeModificationFunctionMapping typeMapping = mapping.Item1;
StorageModificationFunctionMapping functionMapping = mapping.Item2;
EntityKey entityKey = stateEntry.Source.EntityKey;
var stateEntries = new HashSet<IEntityStateEntry> { stateEntry.Source };
// gather all referenced association ends
var collocatedEntries =
// find all related entries corresponding to collocated association types
from end in functionMapping.CollocatedAssociationSetEnds
join candidateEntry in translator.GetRelationships(entityKey)
on end.CorrespondingAssociationEndMember.DeclaringType equals candidateEntry.EntitySet.ElementType
select Tuple.Create(end.CorrespondingAssociationEndMember, candidateEntry);
var currentReferenceEnds = new Dictionary<AssociationEndMember, IEntityStateEntry>();
var originalReferenceEnds = new Dictionary<AssociationEndMember, IEntityStateEntry>();
foreach (var candidate in collocatedEntries)
{
ProcessReferenceCandidate(entityKey, stateEntries, currentReferenceEnds, originalReferenceEnds, candidate.Item1, candidate.Item2);
}
// create function object
FunctionUpdateCommand command;
// consider the following scenario, we need to loop through all the state entries that is correlated with entity2 and make sure it is not changed.
// entity1 <-- Independent Association <-- entity2 <-- Fk association <-- entity 3
// |
// entity4 <-- Fk association <--
if (stateEntries.All(e => e.State == EntityState.Unchanged))
{
// we shouldn't update the entity if it is unchanged, only update when referenced association is changed.
// if not, then this will trigger a fake update for principal end as describe in bug 894569.
command = null;
}
else
{
command = new FunctionUpdateCommand(functionMapping, translator, stateEntries.ToList().AsReadOnly(), stateEntry);
// bind all function parameters
BindFunctionParameters(translator, stateEntry, functionMapping, command, currentReferenceEnds, originalReferenceEnds);
// interpret all result bindings
if (null != functionMapping.ResultBindings)
{
foreach (StorageModificationFunctionResultBinding resultBinding in functionMapping.ResultBindings)
{
PropagatorResult result = stateEntry.Current.GetMemberValue(resultBinding.Property);
command.AddResultColumn(translator, resultBinding.ColumnName, result);
}
}
}
return command;
}
internal override FunctionUpdateCommand Translate(
UpdateTranslator translator,
ExtractedStateEntry stateEntry)
{
var mapping = GetFunctionMapping(stateEntry);
StorageEntityTypeModificationFunctionMapping typeMapping = mapping.Item1;
StorageModificationFunctionMapping functionMapping = mapping.Item2;
EntityKey entityKey = stateEntry.Source.EntityKey;
var stateEntries = new HashSet <IEntityStateEntry> {
stateEntry.Source
};
// gather all referenced association ends
var collocatedEntries =
// find all related entries corresponding to collocated association types
from end in functionMapping.CollocatedAssociationSetEnds
join candidateEntry in translator.GetRelationships(entityKey)
on end.CorrespondingAssociationEndMember.DeclaringType equals candidateEntry.EntitySet.ElementType
select Tuple.Create(end.CorrespondingAssociationEndMember, candidateEntry);
var currentReferenceEnds = new Dictionary <AssociationEndMember, IEntityStateEntry>();
var originalReferenceEnds = new Dictionary <AssociationEndMember, IEntityStateEntry>();
foreach (var candidate in collocatedEntries)
{
ProcessReferenceCandidate(entityKey, stateEntries, currentReferenceEnds, originalReferenceEnds, candidate.Item1, candidate.Item2);
}
// create function object
FunctionUpdateCommand command;
// consider the following scenario, we need to loop through all the state entries that is correlated with entity2 and make sure it is not changed.
// entity1 <-- Independent Association <-- entity2 <-- Fk association <-- entity 3
// |
// entity4 <-- Fk association <--
if (stateEntries.All(e => e.State == EntityState.Unchanged))
{
// we shouldn't update the entity if it is unchanged, only update when referenced association is changed.
// if not, then this will trigger a fake update for principal end as describe in
command = null;
}
else
{
command = new FunctionUpdateCommand(functionMapping, translator, stateEntries.ToList().AsReadOnly(), stateEntry);
// bind all function parameters
BindFunctionParameters(translator, stateEntry, functionMapping, command, currentReferenceEnds, originalReferenceEnds);
// interpret all result bindings
if (null != functionMapping.ResultBindings)
{
foreach (StorageModificationFunctionResultBinding resultBinding in functionMapping.ResultBindings)
{
PropagatorResult result = stateEntry.Current.GetMemberValue(resultBinding.Property);
command.AddResultColumn(translator, resultBinding.ColumnName, result);
}
}
}
return(command);
}
