ODataResponse IODataView.CreateView()
{
var oDataResponse = new ODataResponse();
var messageWriter = new ODataMessageWriter(oDataResponse);
var entryWriter = messageWriter.CreateODataFeedWriter();
var feed = new ODataFeed() { Count = Videos.Count, Id = "Hypermedia-Learning" };
var atomFeed = feed.Atom();
atomFeed.Title = "Hypermedia API - " + PageTitle;
entryWriter.WriteStart(feed);
foreach (var video in Videos)
{
var oDataEntry = new ODataEntry() {};
var atom = oDataEntry.Atom();
atom.Title = "Video : " + video.Link.Title;
atom.Summary = video.Description;
entryWriter.WriteStart(oDataEntry);
entryWriter.WriteEnd();
}
foreach (var item in Community)
{
var oDataEntry = new ODataEntry() { };
var atom = oDataEntry.Atom();
atom.Title = "Community : " + item.Link.Title;
atom.Summary = item.Description;
entryWriter.WriteStart(oDataEntry);
entryWriter.WriteEnd();
}
entryWriter.WriteEnd();
entryWriter.Flush();
oDataResponse.GetStream().Position = 0;
return oDataResponse;
}
protected override void EndEntry(ODataEntry entry)
{
Debug.Assert(
this.ParentNavigationLink == null || !this.ParentNavigationLink.IsCollection.Value,
"We should have already verified that the IsCollection matches the actual content of the link (feed/entry).");
if (entry == null)
{
Debug.Assert(this.ParentNavigationLink != null, "When entry == null, it has to be an expanded single entry navigation.");
// this is a null expanded single entry and it is null, an empty <m:inline /> will be written.
this.CheckAndWriteParentNavigationLinkEndForInlineElement();
return;
}
IEdmEntityType entryType = this.EntryEntityType;
// Initialize the property value cache and cache the entry properties.
EntryPropertiesValueCache propertyValueCache = new EntryPropertiesValueCache(entry);
// NOTE: when writing, we assume the model has been validated already and thus pass int.MaxValue for the maxMappingCount.
ODataEntityPropertyMappingCache epmCache = this.atomOutputContext.Model.EnsureEpmCache(entryType, /*maxMappingCount*/ int.MaxValue);
// Populate the property value cache based on the EPM source tree information.
// We do this since we need to write custom EPM after the properties below and don't
// want to cache all properties just for the case that they are used in a custom EPM.
if (epmCache != null)
{
EpmWriterUtils.CacheEpmProperties(propertyValueCache, epmCache.EpmSourceTree);
}
// Get the projected properties annotation
ProjectedPropertiesAnnotation projectedProperties = entry.GetAnnotation<ProjectedPropertiesAnnotation>();
AtomEntryScope currentEntryScope = this.CurrentEntryScope;
AtomEntryMetadata entryMetadata = entry.Atom();
if (!currentEntryScope.IsElementWritten(AtomElement.Id))
{
// NOTE: We write even null id, in that case we generate an empty atom:id element.
this.atomEntryAndFeedSerializer.WriteEntryId(entry.Id);
}
Uri editLink = entry.EditLink;
if (editLink != null && !currentEntryScope.IsElementWritten(AtomElement.EditLink))
{
this.atomEntryAndFeedSerializer.WriteEntryEditLink(editLink, entryMetadata);
}
Uri readLink = entry.ReadLink;
if (readLink != null && !currentEntryScope.IsElementWritten(AtomElement.ReadLink))
{
this.atomEntryAndFeedSerializer.WriteEntryReadLink(readLink, entryMetadata);
}
// write entry metadata including syndication EPM
AtomEntryMetadata epmEntryMetadata = null;
if (epmCache != null)
{
ODataVersionChecker.CheckEntityPropertyMapping(this.atomOutputContext.Version, entryType, this.atomOutputContext.Model);
epmEntryMetadata = EpmSyndicationWriter.WriteEntryEpm(
epmCache.EpmTargetTree,
propertyValueCache,
entryType.ToTypeReference().AsEntity(),
this.atomOutputContext);
}
this.atomEntryAndFeedSerializer.WriteEntryMetadata(entryMetadata, epmEntryMetadata, this.updatedTime);
// stream properties
IEnumerable<ODataProperty> streamProperties = propertyValueCache.EntryStreamProperties;
if (streamProperties != null)
{
foreach (ODataProperty streamProperty in streamProperties)
{
this.atomEntryAndFeedSerializer.WriteStreamProperty(
streamProperty,
entryType,
this.DuplicatePropertyNamesChecker,
projectedProperties);
}
}
// association links
IEnumerable<ODataAssociationLink> associationLinks = entry.AssociationLinks;
if (associationLinks != null)
{
foreach (ODataAssociationLink associationLink in associationLinks)
{
this.atomEntryAndFeedSerializer.WriteAssociationLink(
associationLink,
entryType,
this.DuplicatePropertyNamesChecker,
projectedProperties);
}
}
// actions
IEnumerable<ODataAction> actions = entry.Actions;
if (actions != null)
{
foreach (ODataAction action in actions)
{
ValidationUtils.ValidateOperationNotNull(action, true);
this.atomEntryAndFeedSerializer.WriteOperation(action);
}
}
// functions
IEnumerable<ODataFunction> functions = entry.Functions;
if (functions != null)
{
foreach (ODataFunction function in functions)
{
ValidationUtils.ValidateOperationNotNull(function, false);
this.atomEntryAndFeedSerializer.WriteOperation(function);
}
}
// write the content
this.WriteEntryContent(
entry,
entryType,
propertyValueCache,
epmCache == null ? null : epmCache.EpmSourceTree.Root,
projectedProperties);
// write custom EPM
if (epmCache != null)
{
EpmCustomWriter.WriteEntryEpm(
this.atomOutputContext.XmlWriter,
epmCache.EpmTargetTree,
propertyValueCache,
entryType.ToTypeReference().AsEntity(),
this.atomOutputContext);
}
// </entry>
this.atomOutputContext.XmlWriter.WriteEndElement();
this.EndEntryXmlCustomization(entry);
this.CheckAndWriteParentNavigationLinkEndForInlineElement();
}
/// <summary>
/// Start writing an entry.
/// </summary>
/// <param name="entry">The entry to write.</param>
protected override void StartEntry(ODataEntry entry)
{
this.CheckAndWriteParentNavigationLinkStartForInlineElement();
Debug.Assert(
this.ParentNavigationLink == null || !this.ParentNavigationLink.IsCollection.Value,
"We should have already verified that the IsCollection matches the actual content of the link (feed/entry).");
if (entry == null)
{
Debug.Assert(this.ParentNavigationLink != null, "When entry == null, it has to be an expanded single entry navigation.");
// this is a null expanded single entry and it is null, an empty <m:inline /> will be written.
return;
}
this.StartEntryXmlCustomization(entry);
// <entry>
this.atomOutputContext.XmlWriter.WriteStartElement(AtomConstants.AtomNamespacePrefix, AtomConstants.AtomEntryElementName, AtomConstants.AtomNamespace);
if (this.IsTopLevel)
{
this.atomEntryAndFeedSerializer.WriteBaseUriAndDefaultNamespaceAttributes();
}
string etag = entry.ETag;
if (etag != null)
{
// TODO, ckerer: if this is a top-level entry also put the ETag into the headers.
ODataAtomWriterUtils.WriteETag(this.atomOutputContext.XmlWriter, etag);
}
AtomEntryScope currentEntryScope = this.CurrentEntryScope;
AtomEntryMetadata entryMetadata = entry.Atom();
// Write the id if it's available here.
// If it's not available here we will try to write it at the end of the entry again.
string entryId = entry.Id;
if (entryId != null)
{
this.atomEntryAndFeedSerializer.WriteEntryId(entryId);
currentEntryScope.SetWrittenElement(AtomElement.Id);
}
// <category term="type" scheme="odatascheme"/>
// If no type information is provided, don't include the category element for type at all
// NOTE: the validation of the type name is done by the core writer.
string typeName = entry.TypeName;
SerializationTypeNameAnnotation serializationTypeNameAnnotation = entry.GetAnnotation<SerializationTypeNameAnnotation>();
if (serializationTypeNameAnnotation != null)
{
typeName = serializationTypeNameAnnotation.TypeName;
}
this.atomEntryAndFeedSerializer.WriteEntryTypeName(typeName, entryMetadata);
// Write the edit link if it's available here.
// If it's not available here we will try to write it at the end of the entry again.
Uri editLink = entry.EditLink;
if (editLink != null)
{
this.atomEntryAndFeedSerializer.WriteEntryEditLink(editLink, entryMetadata);
currentEntryScope.SetWrittenElement(AtomElement.EditLink);
}
// Write the self link if it's available here.
// If it's not available here we will try to write it at the end of the entry again.
Uri readLink = entry.ReadLink;
if (readLink != null)
{
this.atomEntryAndFeedSerializer.WriteEntryReadLink(readLink, entryMetadata);
currentEntryScope.SetWrittenElement(AtomElement.ReadLink);
}
}
protected override void EndEntry(ODataEntry entry)
{
if (entry == null)
{
this.CheckAndWriteParentNavigationLinkEndForInlineElement();
}
else
{
IEdmEntityType entryEntityType = base.EntryEntityType;
EntryPropertiesValueCache propertyValueCache = new EntryPropertiesValueCache(entry);
ODataEntityPropertyMappingCache cache2 = this.atomOutputContext.Model.EnsureEpmCache(entryEntityType, 0x7fffffff);
if (cache2 != null)
{
EpmWriterUtils.CacheEpmProperties(propertyValueCache, cache2.EpmSourceTree);
}
ProjectedPropertiesAnnotation projectedProperties = entry.GetAnnotation<ProjectedPropertiesAnnotation>();
AtomEntryScope currentEntryScope = this.CurrentEntryScope;
AtomEntryMetadata entryMetadata = entry.Atom();
if (!currentEntryScope.IsElementWritten(AtomElement.Id))
{
this.atomEntryAndFeedSerializer.WriteEntryId(entry.Id);
}
Uri editLink = entry.EditLink;
if ((editLink != null) && !currentEntryScope.IsElementWritten(AtomElement.EditLink))
{
this.atomEntryAndFeedSerializer.WriteEntryEditLink(editLink, entryMetadata);
}
Uri readLink = entry.ReadLink;
if ((readLink != null) && !currentEntryScope.IsElementWritten(AtomElement.ReadLink))
{
this.atomEntryAndFeedSerializer.WriteEntryReadLink(readLink, entryMetadata);
}
AtomEntryMetadata epmEntryMetadata = null;
if (cache2 != null)
{
ODataVersionChecker.CheckEntityPropertyMapping(this.atomOutputContext.Version, entryEntityType, this.atomOutputContext.Model);
epmEntryMetadata = EpmSyndicationWriter.WriteEntryEpm(cache2.EpmTargetTree, propertyValueCache, entryEntityType.ToTypeReference().AsEntity(), this.atomOutputContext);
}
this.atomEntryAndFeedSerializer.WriteEntryMetadata(entryMetadata, epmEntryMetadata, this.updatedTime);
IEnumerable<ODataProperty> entryStreamProperties = propertyValueCache.EntryStreamProperties;
if (entryStreamProperties != null)
{
foreach (ODataProperty property in entryStreamProperties)
{
this.atomEntryAndFeedSerializer.WriteStreamProperty(property, entryEntityType, base.DuplicatePropertyNamesChecker, projectedProperties);
}
}
IEnumerable<ODataAssociationLink> associationLinks = entry.AssociationLinks;
if (associationLinks != null)
{
foreach (ODataAssociationLink link in associationLinks)
{
this.atomEntryAndFeedSerializer.WriteAssociationLink(link, entryEntityType, base.DuplicatePropertyNamesChecker, projectedProperties);
}
}
IEnumerable<ODataAction> actions = entry.Actions;
if (actions != null)
{
foreach (ODataAction action in actions)
{
ValidationUtils.ValidateOperationNotNull(action, true);
this.atomEntryAndFeedSerializer.WriteOperation(action);
}
}
IEnumerable<ODataFunction> functions = entry.Functions;
if (functions != null)
{
foreach (ODataFunction function in functions)
{
ValidationUtils.ValidateOperationNotNull(function, false);
this.atomEntryAndFeedSerializer.WriteOperation(function);
}
}
this.WriteEntryContent(entry, entryEntityType, propertyValueCache, (cache2 == null) ? null : cache2.EpmSourceTree.Root, projectedProperties);
if (cache2 != null)
{
EpmCustomWriter.WriteEntryEpm(this.atomOutputContext.XmlWriter, cache2.EpmTargetTree, propertyValueCache, entryEntityType.ToTypeReference().AsEntity(), this.atomOutputContext);
}
this.atomOutputContext.XmlWriter.WriteEndElement();
this.EndEntryXmlCustomization(entry);
this.CheckAndWriteParentNavigationLinkEndForInlineElement();
}
}
protected override void StartEntry(ODataEntry entry)
{
this.CheckAndWriteParentNavigationLinkStartForInlineElement();
if (entry != null)
{
this.StartEntryXmlCustomization(entry);
this.atomOutputContext.XmlWriter.WriteStartElement("", "entry", "http://www.w3.org/2005/Atom");
if (base.IsTopLevel)
{
this.atomEntryAndFeedSerializer.WriteBaseUriAndDefaultNamespaceAttributes();
}
string eTag = entry.ETag;
if (eTag != null)
{
ODataAtomWriterUtils.WriteETag(this.atomOutputContext.XmlWriter, eTag);
}
AtomEntryScope currentEntryScope = this.CurrentEntryScope;
AtomEntryMetadata entryMetadata = entry.Atom();
string id = entry.Id;
if (id != null)
{
this.atomEntryAndFeedSerializer.WriteEntryId(id);
currentEntryScope.SetWrittenElement(AtomElement.Id);
}
string typeName = entry.TypeName;
SerializationTypeNameAnnotation annotation = entry.GetAnnotation<SerializationTypeNameAnnotation>();
if (annotation != null)
{
typeName = annotation.TypeName;
}
this.atomEntryAndFeedSerializer.WriteEntryTypeName(typeName, entryMetadata);
Uri editLink = entry.EditLink;
if (editLink != null)
{
this.atomEntryAndFeedSerializer.WriteEntryEditLink(editLink, entryMetadata);
currentEntryScope.SetWrittenElement(AtomElement.EditLink);
}
Uri readLink = entry.ReadLink;
if (readLink != null)
{
this.atomEntryAndFeedSerializer.WriteEntryReadLink(readLink, entryMetadata);
currentEntryScope.SetWrittenElement(AtomElement.ReadLink);
}
}
}
