public IQueryable <CI_Parent> GetParents()
{
return(CompositionInheritanceHelper.CreateCompositionHierarchy().AsQueryable());
}
/// <summary>
/// Use the changeset composition APIs to navigate all child updates
/// </summary>
/// <param name="parent"></param>
private void NavigateChildChanges(CI_Parent parent)
{
// if the parent has had property modifications, original will
// be non-null
if (this.ChangeSet.GetChangeOperation(parent) != ChangeOperation.Insert)
{
CI_Parent originalParent = this.ChangeSet.GetOriginal(parent);
}
// navigate all child changes w/o specifying operation type
Dictionary <object, ChangeOperation> changeOperationMap = new Dictionary <object, ChangeOperation>();
foreach (CI_Child child in this.ChangeSet.GetAssociatedChanges(parent, p => p.Children))
{
ChangeOperation op = this.ChangeSet.GetChangeOperation(child);
changeOperationMap[child] = op;
if (this.ChangeSet.GetChangeOperation(child) != ChangeOperation.Insert)
{
CI_Child originalChild = this.ChangeSet.GetOriginal(child);
}
if (op == ChangeOperation.None)
{
}
else if (op == ChangeOperation.Insert)
{
CompositionInheritanceHelper.Assert(this.ChangeSet.ChangeSetEntries.SingleOrDefault(p => p.Entity == child && p.Operation == DomainOperation.Insert) != null,
"Expected corresponding insert operation not found.");
}
else if (op == ChangeOperation.Update)
{
CompositionInheritanceHelper.Assert(this.ChangeSet.ChangeSetEntries.SingleOrDefault(p => p.Entity == child && p.Operation == DomainOperation.Update) != null,
"Expected corresponding update operation not found.");
}
else if (op == ChangeOperation.Delete)
{
CompositionInheritanceHelper.Assert(this.ChangeSet.ChangeSetEntries.SingleOrDefault(p => p.Entity == child && p.Operation == DomainOperation.Delete) != null,
"Expected corresponding delete operation not found.");
}
}
// verify all child operations against the map we built up during enumeration
// of associated changes to ensure all operations were returned
foreach (ChangeSetEntry operation in this.ChangeSet.ChangeSetEntries.Where(p => p.Entity.GetType() != typeof(CI_Parent)))
{
switch (operation.Operation)
{
case DomainOperation.Insert:
CompositionHelper.Assert(changeOperationMap.ContainsKey(operation.Entity) &&
changeOperationMap[operation.Entity] == ChangeOperation.Insert,
"Expected insert operation was not returned from GetAssociatedChanges.");
break;
case DomainOperation.Update:
CompositionHelper.Assert(changeOperationMap.ContainsKey(operation.Entity) &&
changeOperationMap[operation.Entity] == ChangeOperation.Update,
"Expected update operation was not returned from GetAssociatedChanges.");
break;
case DomainOperation.Delete:
CompositionHelper.Assert(
changeOperationMap.ContainsKey(operation.Entity) &&
changeOperationMap[operation.Entity] == ChangeOperation.Delete,
"Expected delete operation was not returned from GetAssociatedChanges.");
break;
}
}
// navigate all child changes specifying operation type
foreach (CI_Child child in this.ChangeSet.GetAssociatedChanges(parent, p => p.Children, ChangeOperation.None))
{
}
foreach (CI_Child child in this.ChangeSet.GetAssociatedChanges(parent, p => p.Children, ChangeOperation.Insert))
{
}
foreach (CI_Child child in this.ChangeSet.GetAssociatedChanges(parent, p => p.Children, ChangeOperation.Update))
{
}
foreach (CI_Child child in this.ChangeSet.GetAssociatedChanges(parent, p => p.Children, ChangeOperation.Delete))
{
}
}