// Note that this is called only for association ends. Entities have key values inline. private PropagatorResult CreateEntityKeyResult(IEntityStateEntry stateEntry, EntityKey entityKey) { // get metadata for key EntityType entityType = entityKey.GetEntitySet(m_translator.MetadataWorkspace).ElementType; RowType keyRowType = entityType.GetKeyRowType(m_translator.MetadataWorkspace); ExtractorMetadata keyMetadata = m_translator.GetExtractorMetadata(stateEntry.EntitySet, keyRowType); int keyMemberCount = keyRowType.Properties.Count; PropagatorResult[] keyValues = new PropagatorResult[keyMemberCount]; for (int ordinal = 0; ordinal < keyRowType.Properties.Count; ordinal++) { EdmMember keyMember = keyRowType.Properties[ordinal]; // retrieve information about this key value MemberInformation keyMemberInformation = keyMetadata.m_memberMap[ordinal]; int keyIdentifier = m_translator.KeyManager.GetKeyIdentifierForMemberOffset(entityKey, ordinal, keyRowType.Properties.Count); object keyValue = null; if (entityKey.IsTemporary) { // If the EntityKey is temporary, we need to retrieve the appropriate // key value from the entity itself (or in this case, the IEntityStateEntry). IEntityStateEntry entityEntry = stateEntry.StateManager.GetEntityStateEntry(entityKey); Debug.Assert(entityEntry.State == EntityState.Added, "The corresponding entry for a temp EntityKey should be in the Added State."); keyValue = entityEntry.CurrentValues[keyMember.Name]; } else { // Otherwise, we extract the value from within the EntityKey. keyValue = entityKey.FindValueByName(keyMember.Name); } Debug.Assert(keyValue != null, "keyValue should've been retrieved."); // construct propagator result keyValues[ordinal] = PropagatorResult.CreateKeyValue( keyMemberInformation.Flags, keyValue, stateEntry, keyIdentifier); // see UpdateTranslator.Identifiers for information on key identifiers and ordinals } return(PropagatorResult.CreateStructuralValue(keyValues, keyMetadata.m_type, false)); }
private PropagatorResult CreateSimpleResult(IEntityStateEntry stateEntry, IExtendedDataRecord record, MemberInformation memberInformation, int identifier, bool isModified, int recordOrdinal, object value) { CurrentValueRecord updatableRecord = record as CurrentValueRecord; // construct flags for the value, which is needed for complex type and simple members PropagatorFlags flags = memberInformation.Flags; if (!isModified) { flags |= PropagatorFlags.Preserve; } if (PropagatorResult.NullIdentifier != identifier) { // construct a key member PropagatorResult result; if ((memberInformation.IsServerGenerated || memberInformation.IsForeignKeyMember) && null != updatableRecord) { result = PropagatorResult.CreateServerGenKeyValue(flags, value, stateEntry, identifier, recordOrdinal); } else { result = PropagatorResult.CreateKeyValue(flags, value, stateEntry, identifier); } // we register the entity as the "owner" of an identity so that back-propagation can succeed // (keys can only be back-propagated to entities, not association ends). It also allows us // to walk to the entity state entry in case of exceptions, since the state entry propagated // through the stack may be eliminated in a project above a join. m_translator.KeyManager.RegisterIdentifierOwner(result); return(result); } else { if ((memberInformation.IsServerGenerated || memberInformation.IsForeignKeyMember) && null != updatableRecord) { // note: we only produce a server gen result when return(PropagatorResult.CreateServerGenSimpleValue(flags, value, updatableRecord, recordOrdinal)); } else { return(PropagatorResult.CreateSimpleValue(flags, value)); } } }