/// <summary>
/// Perform an asynchronous dataset walk.
/// </summary>
/// <param name="walker">Walker implementation.</param>
/// <param name="items">Queue of internal items; must be initialized and empty when called from external method.</param>
private static async Task DoWalkAsync(IDicomDatasetWalker walker, Queue <DicomItem> items)
{
try
{
walker.OnBeginWalk();
while (items.Count > 0)
{
var item = items.Dequeue();
if (item is DicomElement)
{
await walker.OnElementAsync(item as DicomElement).ConfigureAwait(false);
}
else if (item is DicomFragmentSequence)
{
walker.OnBeginFragment(item as DicomFragmentSequence);
}
else if (item is DicomFragmentItem)
{
await walker.OnFragmentItemAsync((item as DicomFragmentItem).Buffer).ConfigureAwait(false);
}
else if (item is EndDicomFragment)
{
walker.OnEndFragment();
}
else if (item is DicomSequence)
{
walker.OnBeginSequence(item as DicomSequence);
}
else if (item is BeginDicomSequenceItem)
{
walker.OnBeginSequenceItem((item as BeginDicomSequenceItem).Dataset);
}
else if (item is EndDicomSequenceItem)
{
walker.OnEndSequenceItem();
}
else if (item is EndDicomSequence)
{
walker.OnEndSequence();
}
}
walker.OnEndWalk();
}
catch (Exception e)
{
try
{
walker.OnEndWalk();
throw;
}
catch
{
throw e;
}
}
}
public IAsyncResult BeginWalk(IDicomDatasetWalker walker, AsyncCallback callback, object state)
{
_walker = walker;
_exception = null;
_async = new EventAsyncResult(callback, state);
ThreadPool.QueueUserWorkItem(Walk, null);
return _async;
}
public static IAsyncResult BeginWalk(
this DicomDatasetWalker @this,
IDicomDatasetWalker walker,
AsyncCallback callback,
object state)
{
return(AsyncFactory.ToBegin(@this.WalkAsync(walker), callback, state));
}
/// <summary>
/// Perform an asynchronous "walk" across the DICOM dataset provided in the <see cref="DicomDatasetWalker"/> constructor.
/// </summary>
/// <param name="walker">Dataset walker implementation to be used for dataset traversal.</param>
/// <returns>Awaitable <see cref="Task"/>.</returns>
public Task WalkAsync(IDicomDatasetWalker walker)
{
var items = new Queue <DicomItem>();
BuildWalkQueue(this._dataset, items);
return(DoWalkAsync(walker, items));
}
/// <summary>
/// Perform a synchronous "walk" across the DICOM dataset provided in the <see cref="DicomDatasetWalker"/> constructor.
/// </summary>
/// <param name="walker">Dataset walker implementation to be used for dataset traversal.</param>
public void Walk(IDicomDatasetWalker walker)
{
var items = new Queue <DicomItem>();
BuildWalkQueue(this._dataset, items);
DoWalk(walker, items);
}
public static IAsyncResult BeginWalk(
this DicomDatasetWalker @this,
IDicomDatasetWalker walker,
AsyncCallback callback,
object state)
{
return AsyncFactory.ToBegin(@this.WalkAsync(walker), callback, state);
}
public IAsyncResult BeginWalk(IDicomDatasetWalker walker, AsyncCallback callback, object state)
{
_walker = walker;
_exception = null;
_async = new EventAsyncResult(callback, state);
ThreadPool.QueueUserWorkItem(Walk, null);
return(_async);
}
/// <summary>
/// Perform an asynchronous "walk" across the DICOM dataset provided in the <see cref="DicomDatasetWalker"/> constructor.
/// </summary>
/// <param name="walker">Dataset walker implementation to be used for dataset traversal.</param>
/// <returns>Awaitable <see cref="Task"/>.</returns>
public Task WalkAsync(IDicomDatasetWalker walker)
{
_dataset.OnBeforeSerializing();
var items = new Queue <DicomItem>();
BuildWalkQueue(_dataset, items);
return(DoWalkAsync(walker, items));
}
/// <summary>
/// Perform a synchronous "walk" across the DICOM dataset provided in the <see cref="DicomDatasetWalker"/> constructor.
/// </summary>
/// <param name="walker">Dataset walker implementation to be used for dataset traversal.</param>
public void Walk(IDicomDatasetWalker walker)
{
_dataset.OnBeforeSerializing();
var items = new Queue <DicomItem>();
BuildWalkQueue(_dataset, items);
DoWalk(walker, items);
}
/// <summary>
/// Perform an asynchronous dataset walk.
/// </summary>
/// <param name="walker">Walker implementation.</param>
/// <param name="items">Queue of internal items; must be initialized and empty when called from external method.</param>
private static async Task DoWalkAsync(IDicomDatasetWalker walker, Queue<DicomItem> items)
{
try
{
walker.OnBeginWalk();
while (items.Count > 0)
{
var item = items.Dequeue();
if (item is DicomElement)
{
await walker.OnElementAsync(item as DicomElement).ConfigureAwait(false);
}
else if (item is DicomFragmentSequence)
{
walker.OnBeginFragment(item as DicomFragmentSequence);
}
else if (item is DicomFragmentItem)
{
await walker.OnFragmentItemAsync((item as DicomFragmentItem).Buffer).ConfigureAwait(false);
}
else if (item is EndDicomFragment)
{
walker.OnEndFragment();
}
else if (item is DicomSequence)
{
walker.OnBeginSequence(item as DicomSequence);
}
else if (item is BeginDicomSequenceItem)
{
walker.OnBeginSequenceItem((item as BeginDicomSequenceItem).Dataset);
}
else if (item is EndDicomSequenceItem)
{
walker.OnEndSequenceItem();
}
else if (item is EndDicomSequence)
{
walker.OnEndSequence();
}
}
walker.OnEndWalk();
}
catch (Exception e)
{
try
{
walker.OnEndWalk();
throw;
}
catch
{
throw e;
}
}
}
/// <summary>
/// Perform an asynchronous "walk" across the DICOM dataset provided in the <see cref="DicomDatasetWalker"/> constructor.
/// </summary>
/// <param name="walker">Dataset walker implementation to be used for dataset traversal.</param>
/// <returns>Awaitable <see cref="Task"/>.</returns>
public Task WalkAsync(IDicomDatasetWalker walker)
{
var items = new Queue<DicomItem>();
BuildWalkQueue(this._dataset, items);
return DoWalkAsync(walker, items);
}
/// <summary>
/// Perform a synchronous "walk" across the DICOM dataset provided in the <see cref="DicomDatasetWalker"/> constructor.
/// </summary>
/// <param name="walker">Dataset walker implementation to be used for dataset traversal.</param>
public void Walk(IDicomDatasetWalker walker)
{
var items = new Queue<DicomItem>();
BuildWalkQueue(this._dataset, items);
DoWalk(walker, items);
}
public void Walk(IDicomDatasetWalker walker)
{
EndWalk(BeginWalk(walker, null, null));
}
public void Walk(IDicomDatasetWalker walker)
{
EndWalk(BeginWalk(walker, null, null));
}
