internal EditingContext GetNewOrExistingContext(Uri itemUri)
{
EditingContext itemContext = null;
// creating a new context is an expensive operation, so optimize for the case where it exists
var item = _package.ModelManager.GetArtifact(itemUri);
if (item != null)
{
_mapArtifactToEditingContext.TryGetValue(item, out itemContext);
}
// there isn't one, so call the path that will create it
if (itemContext == null)
{
item = GetNewOrExistingArtifact(itemUri);
if (itemUri != null &&
item != null &&
!_mapArtifactToEditingContext.TryGetValue(item, out itemContext))
{
var service = new EFArtifactService(item);
var editingContext = new EditingContext();
editingContext.SetEFArtifactService(service);
itemContext = editingContext;
_mapArtifactToEditingContext[item] = itemContext;
}
}
return(itemContext);
}
/// <summary>
/// Disposes this editing context.
/// </summary>
/// <param name="disposing">True if this object is being disposed, or false if it is finalizing.</param>
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
// Let any interested parties know the context is being disposed
if (Disposing != null)
{
Disposing(this, EventArgs.Empty);
}
if (_contextItems != null)
{
foreach (var contextItem in _contextItems)
{
var d = contextItem as IDisposable;
if (d != null)
{
d.Dispose();
}
}
}
_efArtifactService = null;
_contextItems = null;
}
}
public static EditingContext GetEditingContext(this EFArtifact artifact)
{
Debug.Assert(artifact != null, "artifact != null");
var service = new EFArtifactService(artifact);
var editingContext = new EditingContext();
editingContext.SetEFArtifactService(service);
return(editingContext);
}
internal void SetEFArtifactService(EFArtifactService artifactService)
{
_efArtifactService = artifactService;
}
