internal sealed override void WriteChanges(EmberWriter writer, IInvocationCollection pendingInvocations)
{
if (this.HasChanges)
{
writer.WriteStartApplicationDefinedType(
GlowElementCollection.Element.OuterId, GlowQualifiedParameter.InnerNumber);
writer.WriteValue(GlowQualifiedParameter.Path.OuterId, this.NumberPath);
writer.WriteStartSet(GlowQualifiedParameter.Contents.OuterId);
if (this.theValue == null)
{
// This can only happen when the parameter happens to be a trigger.
writer.WriteValue(GlowParameterContents.Value.OuterId, 0);
}
else
{
this.WriteValue(writer, this.theValue);
}
writer.WriteEndContainer();
writer.WriteEndContainer();
this.HasChanges = false;
}
}
private void ReadChildContents(
EmberReader reader,
ElementType actualType,
int number,
ref Element child,
out RetrievalState childRetrievalState)
{
reader.AssertInnerNumber(InnerNumber.Set);
if (child != null)
{
childRetrievalState = child.ReadContents(reader, actualType);
}
else
{
using (var stream = new MemoryStream())
using (var writer = new EmberWriter(stream))
{
// Since EmberReader checks that every end of a container is matched by a start, we need to write
// this dummy here.
writer.WriteStartSet(GlowNode.Contents.OuterId);
var identifier = reader.CopyToEndContainer(writer, GlowNodeContents.Identifier.OuterId) as string;
if (identifier != null)
{
writer.Flush();
stream.Position = 0;
using (var contentsReader = new EmberReader(stream))
{
contentsReader.Read(); // Read what we have written with WriteStartSet above
var newPolicy = this.childrenRetrievalPolicy == ChildrenRetrievalPolicy.All ?
ChildrenRetrievalPolicy.All : ChildrenRetrievalPolicy.None;
var context = new Context(this, number, identifier, newPolicy);
child = this.ReadNewChildContents(contentsReader, actualType, context, out childRetrievalState);
if (child != null)
{
this.children.Add(number, child);
}
}
}
else
{
childRetrievalState = RetrievalState.Complete;
child = null;
}
}
}
}