/// <summary>
/// Parses the request URI and message body to create a new entry in the data store.
/// </summary>
/// <param name="messageBody">Stream containing the new entry to create.</param>
/// <returns>Stream containing the new entry if successful, otherwise an error.</returns>
public Stream ProcessCreateRequest(Stream messageBody)
{
object result;
IEdmEntitySet targetEntitySet;
try
{
var queryContext = this.GetDefaultQueryContext();
targetEntitySet = queryContext.ResolveEntitySet();
IncomingRequestMessage message = this.GetIncomingRequestMessage(messageBody);
result = ProcessPostBody(message, targetEntitySet);
}
catch (Exception error)
{
return(this.WriteErrorResponse(400, error));
}
return(this.WriteResponse(
200,
(writer, writerSettings, responseMessage) =>
{
ODataVersion targetVersion = writerSettings.Version.GetValueOrDefault();
responseMessage.SetHeader("Location", ODataObjectModelConverter.BuildEntryUri(result, targetEntitySet, targetVersion).OriginalString);
ResponseWriter.WriteEntry(writer.CreateODataResourceWriter(targetEntitySet), result, targetEntitySet, this.Model, targetVersion, Enumerable.Empty <string>());
}));
}
private object ProcessPutBody(IncomingRequestMessage message, IEdmEntitySet entitySet, IDictionary <string, object> entityKeys)
{
using (var messageReader = new ODataMessageReader(message, this.GetDefaultReaderSettings(), this.Model))
{
var entryReader = messageReader.CreateODataResourceReader(entitySet.EntityType());
while (entryReader.Read())
{
switch (entryReader.State)
{
case ODataReaderState.ResourceEnd:
var entry = (ODataResource)entryReader.Item;
foreach (var property in entry.Properties)
{
this.DataContext.UpdateItem(entitySet, entityKeys, property.Name, property.Value);
}
break;
}
}
}
return(this.DataContext.GetItem(entitySet, entityKeys));
}
private object ProcessPostBody(IncomingRequestMessage message, IEdmEntitySet entitySet)
{
object lastNewInstance = null;
using (var messageReader = new ODataMessageReader(message, this.GetDefaultReaderSettings(), this.Model))
{
var odataItemStack = new Stack<ODataItem>();
var entryReader = messageReader.CreateODataEntryReader(entitySet.EntityType());
IEdmEntitySet currentTargetEntitySet = entitySet;
while (entryReader.Read())
{
switch (entryReader.State)
{
case ODataReaderState.EntryStart:
entryReader.Item.SetAnnotation(new TargetEntitySetAnnotation { TargetEntitySet = currentTargetEntitySet });
odataItemStack.Push(entryReader.Item);
break;
case ODataReaderState.EntryEnd:
{
var entry = (ODataEntry)entryReader.Item;
var targetEntitySet = entry.GetAnnotation<TargetEntitySetAnnotation>().TargetEntitySet;
object newInstance = this.DataContext.CreateNewItem(targetEntitySet);
foreach (var property in entry.Properties)
{
DataContext.UpdatePropertyValue(newInstance, property.Name, property.Value);
}
var boundNavPropAnnotation = odataItemStack.Pop().GetAnnotation<BoundNavigationPropertyAnnotation>();
if (boundNavPropAnnotation != null)
{
foreach (var boundProperty in boundNavPropAnnotation.BoundProperties)
{
bool isCollection = boundProperty.Item1.IsCollection == true;
object propertyValue = isCollection ? boundProperty.Item2 : ((IEnumerable<object>)boundProperty.Item2).Single();
DataContext.UpdatePropertyValue(newInstance, boundProperty.Item1.Name, propertyValue);
}
}
var parentItem = odataItemStack.Count > 0 ? odataItemStack.Peek() : null;
if (parentItem != null)
{
// This new entry belongs to a navigation property and/or feed -
// propagate it up the tree for further processing.
AddChildInstanceAnnotation(parentItem, newInstance);
}
this.DataContext.AddItem(targetEntitySet, newInstance);
lastNewInstance = newInstance;
}
break;
case ODataReaderState.FeedStart:
odataItemStack.Push(entryReader.Item);
break;
case ODataReaderState.FeedEnd:
{
var childAnnotation = odataItemStack.Pop().GetAnnotation<ChildInstanceAnnotation>();
var parentNavLink = odataItemStack.Count > 0 ? odataItemStack.Peek() as ODataNavigationLink : null;
if (parentNavLink != null)
{
// This feed belongs to a navigation property -
// propagate it up the tree for further processing.
AddChildInstanceAnnotation(parentNavLink, childAnnotation.ChildInstances ?? new object[0]);
}
}
break;
case ODataReaderState.NavigationLinkStart:
{
odataItemStack.Push(entryReader.Item);
var navigationLink = (ODataNavigationLink)entryReader.Item;
var navigationProperty = (IEdmNavigationProperty)currentTargetEntitySet.EntityType().FindProperty(navigationLink.Name);
// Current model implementation doesn't expose associations otherwise this would be much cleaner.
currentTargetEntitySet = this.Model.EntityContainer.EntitySets().Single(s => s.EntityType() == navigationProperty.Type.Definition);
}
break;
case ODataReaderState.NavigationLinkEnd:
{
var navigationLink = (ODataNavigationLink)entryReader.Item;
var childAnnotation = odataItemStack.Pop().GetAnnotation<ChildInstanceAnnotation>();
if (childAnnotation != null)
{
// Propagate the bound entries to the parent entry.
AddBoundNavigationPropertyAnnotation(odataItemStack.Peek(), navigationLink, childAnnotation.ChildInstances);
}
}
break;
}
}
}
return lastNewInstance;
}
private object ProcessPostBody(IncomingRequestMessage message, IEdmEntitySet entitySet)
{
object lastNewInstance = null;
using (var messageReader = new ODataMessageReader(message, this.GetDefaultReaderSettings(), this.Model))
{
var odataItemStack = new Stack <ODataItem>();
var entryReader = messageReader.CreateODataResourceReader(entitySet.EntityType());
IEdmEntitySet currentTargetEntitySet = entitySet;
while (entryReader.Read())
{
switch (entryReader.State)
{
case ODataReaderState.ResourceStart:
entryReader.Item.SetAnnotation(new TargetEntitySetAnnotation {
TargetEntitySet = currentTargetEntitySet
});
odataItemStack.Push(entryReader.Item);
break;
case ODataReaderState.ResourceEnd:
{
var entry = (ODataResource)entryReader.Item;
var targetEntitySet = entry.GetAnnotation <TargetEntitySetAnnotation>().TargetEntitySet;
object newInstance = this.DataContext.CreateNewItem(targetEntitySet);
foreach (var property in entry.Properties)
{
DataContext.UpdatePropertyValue(newInstance, property.Name, property.Value);
}
var boundNavPropAnnotation = odataItemStack.Pop().GetAnnotation <BoundNavigationPropertyAnnotation>();
if (boundNavPropAnnotation != null)
{
foreach (var boundProperty in boundNavPropAnnotation.BoundProperties)
{
bool isCollection = boundProperty.Item1.IsCollection == true;
object propertyValue = isCollection ? boundProperty.Item2 : ((IEnumerable <object>)boundProperty.Item2).Single();
DataContext.UpdatePropertyValue(newInstance, boundProperty.Item1.Name, propertyValue);
}
}
var parentItem = odataItemStack.Count > 0 ? odataItemStack.Peek() : null;
if (parentItem != null)
{
// This new entry belongs to a navigation property and/or feed -
// propagate it up the tree for further processing.
AddChildInstanceAnnotation(parentItem, newInstance);
}
this.DataContext.AddItem(targetEntitySet, newInstance);
lastNewInstance = newInstance;
}
break;
case ODataReaderState.ResourceSetStart:
odataItemStack.Push(entryReader.Item);
break;
case ODataReaderState.ResourceSetEnd:
{
var childAnnotation = odataItemStack.Pop().GetAnnotation <ChildInstanceAnnotation>();
var parentNavLink = odataItemStack.Count > 0 ? odataItemStack.Peek() as ODataNestedResourceInfo : null;
if (parentNavLink != null)
{
// This feed belongs to a navigation property -
// propagate it up the tree for further processing.
AddChildInstanceAnnotation(parentNavLink, childAnnotation.ChildInstances ?? new object[0]);
}
}
break;
case ODataReaderState.NestedResourceInfoStart:
{
odataItemStack.Push(entryReader.Item);
var navigationLink = (ODataNestedResourceInfo)entryReader.Item;
var navigationProperty = (IEdmNavigationProperty)currentTargetEntitySet.EntityType().FindProperty(navigationLink.Name);
// Current model implementation doesn't expose associations otherwise this would be much cleaner.
currentTargetEntitySet = this.Model.EntityContainer.EntitySets().Single(s => s.EntityType() == navigationProperty.Type.Definition);
}
break;
case ODataReaderState.NestedResourceInfoEnd:
{
var navigationLink = (ODataNestedResourceInfo)entryReader.Item;
var childAnnotation = odataItemStack.Pop().GetAnnotation <ChildInstanceAnnotation>();
if (childAnnotation != null)
{
// Propagate the bound entries to the parent entry.
AddBoundNavigationPropertyAnnotation(odataItemStack.Peek(), navigationLink, childAnnotation.ChildInstances);
}
}
break;
}
}
}
return(lastNewInstance);
}
private object ProcessPutBody(IncomingRequestMessage message, IEdmEntitySet entitySet, IDictionary<string, object> entityKeys)
{
using (var messageReader = new ODataMessageReader(message, this.GetDefaultReaderSettings(), this.Model))
{
var entryReader = messageReader.CreateODataEntryReader(entitySet.EntityType());
while (entryReader.Read())
{
switch(entryReader.State)
{
case ODataReaderState.EntryEnd:
var entry = (ODataEntry)entryReader.Item;
foreach (var property in entry.Properties)
{
this.DataContext.UpdateItem(entitySet, entityKeys, property.Name, property.Value);
}
break;
}
}
}
return this.DataContext.GetItem(entitySet, entityKeys);
}
