private void StartRead(ODataReader reader, ODataWriter writer)
{
ExceptionUtilities.Assert(reader.State == ODataReaderState.Start, "Reader is expected to be in state Start at StartRead.");
while (reader.Read())
{
switch(reader.State)
{
case ODataReaderState.EntryStart:
writer.WriteStart((ODataEntry)reader.Item);
break;
case ODataReaderState.FeedStart:
writer.WriteStart((ODataFeed)reader.Item);
break;
case ODataReaderState.NavigationLinkStart:
writer.WriteStart((ODataNavigationLink)reader.Item);
break;
case ODataReaderState.EntryEnd:
case ODataReaderState.FeedEnd:
case ODataReaderState.NavigationLinkEnd:
writer.WriteEnd();
break;
default:
throw new NotSupportedException();
};
}
}
private ODataResponse ReadResponse(ODataReader odataReader)
{
ResponseNode rootNode = null;
var nodeStack = new Stack<ResponseNode>();
while (odataReader.Read())
{
if (odataReader.State == ODataReaderState.Completed)
break;
switch (odataReader.State)
{
case ODataReaderState.FeedStart:
StartFeed(nodeStack, CreateFeedAnnotaions(odataReader.Item as ODataFeed));
break;
case ODataReaderState.FeedEnd:
EndFeed(nodeStack, CreateFeedAnnotaions(odataReader.Item as ODataFeed), ref rootNode);
break;
case ODataReaderState.EntryStart:
StartEntry(nodeStack);
break;
case ODataReaderState.EntryEnd:
EndEntry(nodeStack, ref rootNode, odataReader.Item);
break;
case ODataReaderState.NavigationLinkStart:
StartNavigationLink(nodeStack, (odataReader.Item as ODataNavigationLink).Name);
break;
case ODataReaderState.NavigationLinkEnd:
EndNavigationLink(nodeStack);
break;
}
}
return ODataResponse.FromNode(rootNode);
}
/// <summary>
/// Reads an ODataFeed or an ODataItem from the reader.
/// </summary>
/// <param name="reader">The OData reader to read from.</param>
/// <returns>The read feed or entry.</returns>
public static ODataItemBase ReadEntryOrFeed(ODataReader reader)
{
if (reader == null)
{
throw Error.ArgumentNull("odataReader");
}
ODataItemBase topLevelItem = null;
Stack<ODataItemBase> itemsStack = new Stack<ODataItemBase>();
while (reader.Read())
{
switch (reader.State)
{
case ODataReaderState.EntryStart:
ODataEntry entry = (ODataEntry)reader.Item;
ODataEntryWithNavigationLinks entryWrapper = null;
if (entry != null)
{
entryWrapper = new ODataEntryWithNavigationLinks(entry);
}
if (itemsStack.Count == 0)
{
Contract.Assert(entry != null, "The top-level entry can never be null.");
topLevelItem = entryWrapper;
}
else
{
ODataItemBase parentItem = itemsStack.Peek();
ODataFeedWithEntries parentFeed = parentItem as ODataFeedWithEntries;
if (parentFeed != null)
{
parentFeed.Entries.Add(entryWrapper);
}
else
{
ODataNavigationLinkWithItems parentNavigationLink = (ODataNavigationLinkWithItems)parentItem;
Contract.Assert(parentNavigationLink.NavigationLink.IsCollection == false, "Only singleton navigation properties can contain entry as their child.");
Contract.Assert(parentNavigationLink.NestedItems.Count == 0, "Each navigation property can contain only one entry as its direct child.");
parentNavigationLink.NestedItems.Add(entryWrapper);
}
}
itemsStack.Push(entryWrapper);
break;
case ODataReaderState.EntryEnd:
Contract.Assert(itemsStack.Count > 0 && (reader.Item == null || itemsStack.Peek().Item == reader.Item), "The entry which is ending should be on the top of the items stack.");
itemsStack.Pop();
break;
case ODataReaderState.NavigationLinkStart:
ODataNavigationLink navigationLink = (ODataNavigationLink)reader.Item;
Contract.Assert(navigationLink != null, "Navigation link should never be null.");
ODataNavigationLinkWithItems navigationLinkWrapper = new ODataNavigationLinkWithItems(navigationLink);
Contract.Assert(itemsStack.Count > 0, "Navigation link can't appear as top-level item.");
{
ODataEntryWithNavigationLinks parentEntry = (ODataEntryWithNavigationLinks)itemsStack.Peek();
parentEntry.NavigationLinks.Add(navigationLinkWrapper);
}
itemsStack.Push(navigationLinkWrapper);
break;
case ODataReaderState.NavigationLinkEnd:
Contract.Assert(itemsStack.Count > 0 && itemsStack.Peek().Item == reader.Item, "The navigation link which is ending should be on the top of the items stack.");
itemsStack.Pop();
break;
case ODataReaderState.FeedStart:
ODataFeed feed = (ODataFeed)reader.Item;
Contract.Assert(feed != null, "Feed should never be null.");
ODataFeedWithEntries feedWrapper = new ODataFeedWithEntries(feed);
if (itemsStack.Count > 0)
{
ODataNavigationLinkWithItems parentNavigationLink = (ODataNavigationLinkWithItems)itemsStack.Peek();
Contract.Assert(parentNavigationLink != null, "this has to be an inner feed. inner feeds always have a navigation link.");
Contract.Assert(parentNavigationLink.NavigationLink.IsCollection == true, "Only collection navigation properties can contain feed as their child.");
parentNavigationLink.NestedItems.Add(feedWrapper);
}
else
{
topLevelItem = feedWrapper;
}
itemsStack.Push(feedWrapper);
break;
case ODataReaderState.FeedEnd:
Contract.Assert(itemsStack.Count > 0 && itemsStack.Peek().Item == reader.Item, "The feed which is ending should be on the top of the items stack.");
itemsStack.Pop();
break;
case ODataReaderState.EntityReferenceLink:
ODataEntityReferenceLink entityReferenceLink = (ODataEntityReferenceLink)reader.Item;
Contract.Assert(entityReferenceLink != null, "Entity reference link should never be null.");
ODataEntityReferenceLinkBase entityReferenceLinkWrapper = new ODataEntityReferenceLinkBase(entityReferenceLink);
Contract.Assert(itemsStack.Count > 0, "Entity reference link should never be reported as top-level item.");
{
ODataNavigationLinkWithItems parentNavigationLink = (ODataNavigationLinkWithItems)itemsStack.Peek();
parentNavigationLink.NestedItems.Add(entityReferenceLinkWrapper);
}
break;
default:
Contract.Assert(false, "We should never get here, it means the ODataReader reported a wrong state.");
break;
}
}
Contract.Assert(reader.State == ODataReaderState.Completed, "We should have consumed all of the input by now.");
Contract.Assert(topLevelItem != null, "A top level entry or feed should have been read by now.");
return topLevelItem;
}
public static ODataFeed ReadFeedParameterValue(ODataReader feedReader)
{
ODataFeed entry = null;
while (feedReader.Read())
{
if (feedReader.State == ODataReaderState.FeedEnd)
{
entry = feedReader.Item as ODataFeed;
}
}
return entry;
}
public static ODataEntry ReadEntryParameterValue(ODataReader entryReader)
{
ODataEntry entry = null;
while (entryReader.Read())
{
if (entryReader.State == ODataReaderState.EntryEnd)
{
entry = entryReader.Item as ODataEntry;
}
}
return entry;
}
/// <summary>
/// Read a navigation link with an <see cref="ODataReader"/> positioned on the navigation link start.
/// </summary>
/// <param name="reader">The <see cref="ODataReader"/> to use for reading the navigation link.</param>
/// <returns>An <see cref="ODataNavigationLink"/>, possibly with annotations.</returns>
/// <returns></returns>
private ODataNavigationLink ReadNavigationLink(ODataReader reader)
{
this.assert.AreEqual(ODataReaderState.NavigationLinkStart, reader.State, "Reader states don't match.");
reader.Read();
List<ODataItem> expandedItems = new List<ODataItem>();
while (reader.State != ODataReaderState.NavigationLinkEnd)
{
if (reader.State == ODataReaderState.EntryStart)
{
if (reader.Item == null)
{
expandedItems.Add(null);
// Read over the entry start
reader.Read();
}
else
{
expandedItems.Add(this.ReadEntry(reader));
}
this.assert.AreEqual(ODataReaderState.EntryEnd, reader.State, "Reader states don't match.");
}
else if (reader.State == ODataReaderState.FeedStart)
{
expandedItems.Add(this.ReadFeed(reader));
this.assert.AreEqual(ODataReaderState.FeedEnd, reader.State, "Reader states don't match.");
}
else if (reader.State == ODataReaderState.EntityReferenceLink)
{
this.assert.IsTrue(this.testConfiguration.IsRequest, "EntityReferenceLink state should only be returned in requests.");
ODataEntityReferenceLink entityReferenceLink = (ODataEntityReferenceLink)reader.Item;
this.assert.IsNotNull(entityReferenceLink, "Reader should never report null entity reference link.");
expandedItems.Add(entityReferenceLink);
}
else
{
this.assert.Fail("Unexpected reader state '" + reader.State + "' for reading a navigation link.");
}
reader.Read();
}
this.assert.AreEqual(ODataReaderState.NavigationLinkEnd, reader.State, "Reader states don't match.");
ODataNavigationLink navigationLink = (ODataNavigationLink)reader.Item;
ODataNavigationLinkExpandedItemObjectModelAnnotation expandedLinkAnnotation = null;
if (this.testConfiguration.IsRequest)
{
this.assert.IsTrue(expandedItems.Count > 0, "Deferred link (navigation link without any content) should only be returned in responses.");
expandedLinkAnnotation = expandedItems.Count > 1
? new ODataNavigationLinkExpandedItemObjectModelAnnotation() { ExpandedItem = expandedItems }
: new ODataNavigationLinkExpandedItemObjectModelAnnotation() { ExpandedItem = expandedItems[0] };
}
else
{
this.assert.IsTrue(expandedItems.Count <= 1, "In response each navigation link may contain at most one item in its content (entry or feed).");
if (expandedItems.Count == 1)
{
expandedLinkAnnotation = new ODataNavigationLinkExpandedItemObjectModelAnnotation() { ExpandedItem = expandedItems[0] };
}
}
if (expandedLinkAnnotation != null)
{
navigationLink.SetAnnotation(expandedLinkAnnotation);
}
return navigationLink;
}
/// <summary>
/// Read an entry with an <see cref="ODataReader"/> positioned on the entry start.
/// </summary>
/// <param name="reader">The <see cref="ODataReader"/> to use for reading the entry.</param>
/// <returns>An <see cref="ODataEntry"/>, possibly with annotations.</returns>
private ODataEntry ReadEntry(ODataReader reader)
{
this.assert.AreEqual(ODataReaderState.EntryStart, reader.State, "Reader states don't match.");
ODataEntry entry = (ODataEntry)reader.Item;
ODataEntryPayloadOrderObjectModelAnnotation payloadOrderItems = this.storePayloadOrder ? new ODataEntryPayloadOrderObjectModelAnnotation() : null;
ODataEntryNavigationLinksObjectModelAnnotation navigationLinks = new ODataEntryNavigationLinksObjectModelAnnotation();
AddEntryPayloadOrderItems(entry, payloadOrderItems);
if (payloadOrderItems != null)
{
payloadOrderItems.AddStartEntry();
}
while (reader.Read())
{
if (reader.State == ODataReaderState.NavigationLinkStart)
{
int positionInProperties = entry.Properties.Count();
AddEntryPayloadOrderItems(entry, payloadOrderItems);
ODataNavigationLink navigationLinkAtStart = (ODataNavigationLink)reader.Item;
if (payloadOrderItems != null)
{
payloadOrderItems.AddODataNavigationLink(navigationLinkAtStart);
}
ODataNavigationLink navigationLink = this.ReadNavigationLink(reader);
this.assert.AreSame(navigationLinkAtStart, navigationLink, "Expected the same navigation link instance.");
navigationLinks.Add(navigationLink, positionInProperties + navigationLinks.Count);
}
else if (reader.State == ODataReaderState.EntryEnd)
{
// we are done reading this entry
break;
}
else
{
this.assert.Fail("Unexpected reader state '" + reader.State + "' for reading an entry.");
}
}
this.assert.AreEqual(ODataReaderState.EntryEnd, reader.State, "Reader states don't match.");
ODataEntry entryAtEnd = (ODataEntry)reader.Item;
this.assert.AreSame(entry, entryAtEnd, "Expected the same entry instance.");
AddEntryPayloadOrderItems(entry, payloadOrderItems);
entry.SetAnnotation(navigationLinks);
if (this.storePayloadOrder)
{
entry.SetAnnotation(payloadOrderItems);
}
return entry;
}
/// <summary>
/// Read a feed with an <see cref="ODataReader"/> positioned on the feed start.
/// </summary>
/// <param name="reader">The <see cref="ODataReader"/> to use for reading the feed.</param>
/// <returns>An <see cref="ODataFeed"/>, possibly with annotations.</returns>
private ODataFeed ReadFeed(ODataReader reader)
{
this.assert.AreEqual(ODataReaderState.FeedStart, reader.State, "Reader states don't match.");
ODataFeed feed = (ODataFeed)reader.Item;
ODataFeedPayloadOrderObjectModelAnnotation payloadOrderItems = this.storePayloadOrder ? new ODataFeedPayloadOrderObjectModelAnnotation() : null;
ODataFeedEntriesObjectModelAnnotation feedEntries = new ODataFeedEntriesObjectModelAnnotation();
AddFeedPayloadOrderItems(feed, payloadOrderItems);
if (payloadOrderItems != null)
{
payloadOrderItems.AddStartFeed();
}
while (reader.Read())
{
if (reader.State == ODataReaderState.EntryStart)
{
AddFeedPayloadOrderItems(feed, payloadOrderItems);
ODataEntry entry = this.ReadEntry(reader);
if (payloadOrderItems != null)
{
payloadOrderItems.AddEntry(entry);
}
feedEntries.Add(entry);
}
else if (reader.State == ODataReaderState.FeedEnd)
{
// we are done reading the feed
break;
}
else
{
this.assert.Fail("Unexpected reader state '" + reader.State + "' for reading a feed.");
}
}
this.assert.AreEqual(ODataReaderState.FeedEnd, reader.State, "Reader states don't match.");
ODataFeed feedAtEnd = (ODataFeed)reader.Item;
this.assert.AreSame(feed, feedAtEnd, "Expected the same feed instance.");
AddFeedPayloadOrderItems(feed, payloadOrderItems);
feed.SetAnnotation(feedEntries);
if (this.storePayloadOrder)
{
feed.SetAnnotation(payloadOrderItems);
}
return feed;
}
private ODataResponse ReadResponse(ODataReader odataReader, bool includeResourceTypeInEntryProperties)
{
ResponseNode rootNode = null;
var nodeStack = new Stack<ResponseNode>();
while (odataReader.Read())
{
if (odataReader.State == ODataReaderState.Completed)
break;
switch (odataReader.State)
{
case ODataReaderState.FeedStart:
StartFeed(nodeStack, CreateFeedAnnotaions(odataReader.Item as ODataFeed));
break;
case ODataReaderState.FeedEnd:
EndFeed(nodeStack, CreateFeedAnnotaions(odataReader.Item as ODataFeed), ref rootNode);
break;
case ODataReaderState.EntryStart:
StartEntry(nodeStack);
break;
case ODataReaderState.EntryEnd:
EndEntry(nodeStack, ref rootNode, odataReader.Item, includeResourceTypeInEntryProperties);
break;
case ODataReaderState.NavigationLinkStart:
StartNavigationLink(nodeStack, (odataReader.Item as ODataNavigationLink).Name);
break;
case ODataReaderState.NavigationLinkEnd:
EndNavigationLink(nodeStack);
break;
}
}
return rootNode.Feed != null
? ODataResponse.FromFeed(rootNode.Feed, rootNode.FeedAnnotations)
: ODataResponse.FromEntry(rootNode.Entry);
}