private static HierarchySyncMetadataItem.SyncMetadataAttachmentStream Instantate(StreamAttachment attachment, StreamBase.Capabilities streamCapabilities)
{
if (attachment == null)
{
HierarchySyncMetadataItem.Tracer.TraceDebug(0L, "SyncMetadataAttachmentStream:Instantate - Returning null stream as attachment was also null");
return(null);
}
HierarchySyncMetadataItem.SyncMetadataAttachmentStream result;
using (DisposeGuard disposeGuard = default(DisposeGuard))
{
disposeGuard.Add <StreamAttachment>(attachment);
PropertyOpenMode propertyOpenMode = ((streamCapabilities & StreamBase.Capabilities.Writable) == StreamBase.Capabilities.Writable) ? PropertyOpenMode.Modify : PropertyOpenMode.ReadOnly;
HierarchySyncMetadataItem.Tracer.TraceDebug <PropertyOpenMode, StreamBase.Capabilities>(0L, "SyncMetadataAttachmentStream:Instantate - Getting content stream. Open Mode={0}, Stream Capabilities={1}", propertyOpenMode, streamCapabilities);
Stream contentStream = attachment.GetContentStream(propertyOpenMode);
disposeGuard.Add <Stream>(contentStream);
HierarchySyncMetadataItem.SyncMetadataAttachmentStream syncMetadataAttachmentStream = new HierarchySyncMetadataItem.SyncMetadataAttachmentStream(attachment, contentStream, streamCapabilities);
disposeGuard.Success();
result = syncMetadataAttachmentStream;
}
return(result);
}
public static HierarchySyncMetadataItem.SyncMetadataAttachmentStream GetExistingAttachment(HierarchySyncMetadataItem item, string attachmentName, StreamBase.Capabilities streamCapabilities)
{
ArgumentValidator.ThrowIfNull("item", item);
ArgumentValidator.ThrowIfNullOrWhiteSpace("attachmentName", attachmentName);
return(HierarchySyncMetadataItem.SyncMetadataAttachmentStream.Instantate(item.GetStreamAttachment(attachmentName), streamCapabilities));
}
private SyncMetadataAttachmentStream(StreamAttachment streamAttachment, Stream contentStream, StreamBase.Capabilities streamCapabilities) : base(contentStream, true, streamCapabilities | StreamBase.Capabilities.Seekable)
{
ArgumentValidator.ThrowIfNull("streamAttachment", streamAttachment);
ArgumentValidator.ThrowIfNull("contentStream", contentStream);
this.streamAttachment = streamAttachment;
this.shouldSaveOnDispose = ((streamCapabilities & StreamBase.Capabilities.Writable) == StreamBase.Capabilities.Writable);
}
