/// <summary>
/// Builds the list of submit operations from the current <see cref="EntityChangeSet"/>.
/// </summary>
/// <param name="changeSet">The <see cref="EntityChangeSet"/> to process.</param>
/// <returns>The list of <see cref="ChangeSetEntry"/> for the specified <see cref="EntityChangeSet"/>.</returns>
private static List<ChangeSetEntry> BuildOperations(EntityChangeSet changeSet)
{
List<ChangeSetEntry> operations = new List<ChangeSetEntry>();
int clientID = 0;
EntityOperationType operationType = EntityOperationType.None;
foreach (Entity entity in changeSet)
{
switch (entity.EntityState)
{
case EntityState.New:
operationType = EntityOperationType.Insert;
break;
case EntityState.Modified:
operationType = EntityOperationType.Update;
break;
case EntityState.Deleted:
operationType = EntityOperationType.Delete;
break;
default:
continue;
}
// create the operation and apply any original values
ChangeSetEntry changeSetEntry = new ChangeSetEntry(entity, clientID++, operationType);
if (entity.OriginalValues != null)
{
if (entity.MetaType.ShouldRoundtripOriginal && entity.OriginalValues != null)
{
changeSetEntry.OriginalEntity = GetRoundtripEntity(entity);
}
else
{
// In cases where the entity is modified but we're not sending
// an original we need to flag the entity as having changes.
// For example, this happens in Timestamp scenarios.
changeSetEntry.HasMemberChanges = true;
}
}
// add any custom method invocations
if (entity.CustomMethodInvocation != null)
{
if (string.IsNullOrEmpty(entity.CustomMethodInvocation.Name))
{
throw new ArgumentException(Resource.DomainClient_InvocationNameCannotBeNullOrEmpty);
}
if (changeSetEntry.EntityActions == null)
{
changeSetEntry.EntityActions = new Dictionary<string, object[]>();
}
changeSetEntry.EntityActions.Add(entity.CustomMethodInvocation.Name, entity.CustomMethodInvocation.Parameters.ToArray());
}
operations.Add(changeSetEntry);
}
return operations;
}
/// <summary>
/// Build and set the association maps for all operations in the specified changeset
/// </summary>
private void Build()
{
foreach (var entityGroup in this._changeSetEntries.GroupBy(p => p.Entity.GetType()))
{
foreach (ChangeSetEntry changeSetEntry in entityGroup)
{
this._currentChangeSetEntry = changeSetEntry;
this.Visit(changeSetEntry.Entity);
}
}
}
public override void Visit(Entity entity)
{
if (this._visited.ContainsKey(entity))
{
return;
}
// if the entity is unmodified, add an ChangeSetEntry for it
if (this._isChild && entity.EntityState == EntityState.Unmodified)
{
ChangeSetEntry op = new ChangeSetEntry(entity, this._id++, EntityOperationType.None);
this._changeSetEntries.Add(op);
}
this._visited.Add(entity, true);
base.Visit(entity);
}
/// <summary>
/// Builds the list of submit operations from the current <see cref="EntityChangeSet"/>.
/// </summary>
/// <param name="changeSet">The <see cref="EntityChangeSet"/> to process.</param>
/// <returns>The list of <see cref="ChangeSetEntry"/> for the specified <see cref="EntityChangeSet"/>.</returns>
private static List <ChangeSetEntry> BuildOperations(EntityChangeSet changeSet)
{
List <ChangeSetEntry> operations = new List <ChangeSetEntry>();
int clientID = 0;
EntityOperationType operationType = EntityOperationType.None;
foreach (Entity entity in changeSet)
{
switch (entity.EntityState)
{
case EntityState.New:
operationType = EntityOperationType.Insert;
break;
case EntityState.Modified:
operationType = EntityOperationType.Update;
break;
case EntityState.Deleted:
operationType = EntityOperationType.Delete;
break;
default:
continue;
}
// create the operation and apply any original values
ChangeSetEntry changeSetEntry = new ChangeSetEntry(entity, clientID++, operationType);
if (entity.OriginalValues != null)
{
if (entity.MetaType.ShouldRoundtripOriginal && entity.OriginalValues != null)
{
changeSetEntry.OriginalEntity = GetRoundtripEntity(entity);
}
else
{
// In cases where the entity is modified but we're not sending
// an original we need to flag the entity as having changes.
// For example, this happens in Timestamp scenarios.
changeSetEntry.HasMemberChanges = true;
}
}
// add any custom method invocations
var entityActions = (ICollection <EntityAction>)entity.EntityActions;
foreach (EntityAction customInvokation in entityActions)
{
if (string.IsNullOrEmpty(customInvokation.Name))
{
throw new ArgumentException(Resource.DomainClient_InvocationNameCannotBeNullOrEmpty);
}
if (changeSetEntry.EntityActions == null)
{
changeSetEntry.EntityActions = new List <Serialization.KeyValue <string, object[]> >();
}
changeSetEntry.EntityActions.Add(
new Serialization.KeyValue <string, object[]>(customInvokation.Name, customInvokation.Parameters.ToArray()));
}
operations.Add(changeSetEntry);
}
return(operations);
}
protected override void VisitEntityRef(IEntityRef entityRef, Entity parent, MetaMember member)
{
// Check for [ExternalReference] properties, if found we can skip visiting these
// external entities so they will not be included in our change set.
if (member.IsExternalReference)
{
return;
}
// We don't want to cause any deferred loading of the EntityRef in non-compositional
// cases. Note that the UnmodifiedOperationAdder has already caused compositional
// associations to load, so they will have values.
Entity referenced = null;
if (entityRef != null && entityRef.HasValue)
{
referenced = entityRef.Entity;
}
// Now determine the originally referenced entity if this association is a composition
// and the child has been removed
Entity prevReferenced = null;
bool isComposition = member.IsComposition;
if (isComposition && parent.EntityState != EntityState.New)
{
ChangeSetEntry entry = this.FindOriginalChildren(member.AssociationAttribute).SingleOrDefault();
if (entry != null)
{
prevReferenced = entry.Entity;
}
}
if (isComposition && prevReferenced == null)
{
// if this is an unmodified composition, set the previously referenced entity
// to the currently referenced entity
prevReferenced = referenced;
}
// If the referenced entity is New and the parent is not Deleted or the referenced entity is a composed child and the target
// is part of the changeset, set the association
int refId = -1;
bool shouldIncludeNewAssociation = referenced != null && (this._currentChangeSetEntry.Entity.EntityState != EntityState.Deleted && referenced.EntityState == EntityState.New);
if (referenced != null && (shouldIncludeNewAssociation || isComposition) && this._entityIdMap.TryGetValue(referenced, out refId))
{
// set the current reference
Dictionary <string, int[]> associatedEntities = (Dictionary <string, int[]>) this._currentChangeSetEntry.Associations;
if (associatedEntities == null)
{
associatedEntities = new Dictionary <string, int[]>();
this._currentChangeSetEntry.Associations = associatedEntities;
}
associatedEntities.Add(member.Name, new int[] { refId });
}
// If the association is a composition, set the original reference
if (prevReferenced != null && isComposition && this._entityIdMap.TryGetValue(prevReferenced, out refId))
{
Dictionary <string, int[]> associatedEntities = (Dictionary <string, int[]>) this._currentChangeSetEntry.OriginalAssociations;
if (associatedEntities == null)
{
associatedEntities = new Dictionary <string, int[]>();
this._currentChangeSetEntry.OriginalAssociations = associatedEntities;
}
associatedEntities.Add(member.Name, new int[] { refId });
}
}
public override void Visit(Entity entity)
{
if (this._visited.ContainsKey(entity))
{
return;
}
// if the entity is unmodified, add an ChangeSetEntry for it
if (this._isChild && entity.EntityState == EntityState.Unmodified)
{
ChangeSetEntry op = new ChangeSetEntry(entity, this._id++, EntityOperationType.None);
this._changeSetEntries.Add(op);
}
this._visited.Add(entity, true);
base.Visit(entity);
}
/// <summary>
/// Build and set the association maps for all operations in the specified changeset
/// </summary>
private void Build()
{
foreach (var entityGroup in this._changeSetEntries.GroupBy(p => p.Entity.GetType()))
{
foreach (ChangeSetEntry changeSetEntry in entityGroup)
{
this._currentChangeSetEntry = changeSetEntry;
this.Visit(changeSetEntry.Entity);
}
}
}
