/// <summary>
/// Writes the navigation link's start element and atom metadata.
/// </summary>
/// <param name="navigationLink">The navigation link to write.</param>
/// <param name="navigationLinkUrlOverride">Url to use for the navigation link. If this is specified the Url property on the <paramref name="navigationLink"/>
/// will be ignored. If this parameter is null, the Url from the navigation link is used.</param>
internal void WriteNavigationLinkStart(ODataNavigationLink navigationLink, Uri navigationLinkUrlOverride)
{
Debug.Assert(navigationLink != null, "navigationLink != null");
Debug.Assert(!string.IsNullOrEmpty(navigationLink.Name), "The navigation link name was not verified yet.");
Debug.Assert(navigationLink.Url != null, "The navigation link Url was not verified yet.");
Debug.Assert(navigationLink.IsCollection.HasValue, "navigationLink.IsCollection.HasValue");
if (navigationLink.AssociationLinkUrl != null)
{
// TODO:Association Link - Add back support for customizing association link element in Atom
this.WriteAssociationLink(navigationLink.Name, navigationLink.AssociationLinkUrl, null);
}
// <atom:link>
this.XmlWriter.WriteStartElement(AtomConstants.AtomNamespacePrefix, AtomConstants.AtomLinkElementName, AtomConstants.AtomNamespace);
string linkRelation = AtomUtils.ComputeODataNavigationLinkRelation(navigationLink);
string linkType = AtomUtils.ComputeODataNavigationLinkType(navigationLink);
string linkTitle = navigationLink.Name;
Uri navigationLinkUrl = navigationLinkUrlOverride ?? navigationLink.Url;
AtomLinkMetadata linkMetadata = navigationLink.GetAnnotation <AtomLinkMetadata>();
AtomLinkMetadata mergedMetadata = ODataAtomWriterMetadataUtils.MergeLinkMetadata(linkMetadata, linkRelation, navigationLinkUrl, linkTitle, linkType);
this.atomEntryMetadataSerializer.WriteAtomLinkAttributes(mergedMetadata, null /* etag */);
}
/// <summary>
/// Write the metadata for an OData association link; makes sure any duplicate of the link's values duplicated in metadata are equal.
/// </summary>
/// <param name="navigationPropertyName">The name of the navigation property whose association link is being written.</param>
/// <param name="associationLinkUrl">The association link url to write.</param>
/// <param name="associationLinkMetadata">Atom metadata about this link element. This can be used to customized the link element with additional XML attributes.</param>
internal void WriteAssociationLink(string navigationPropertyName, Uri associationLinkUrl, AtomLinkMetadata associationLinkMetadata)
{
AtomLinkMetadata linkMetadata = associationLinkMetadata;
string linkRelation = AtomUtils.ComputeODataAssociationLinkRelation(navigationPropertyName);
AtomLinkMetadata mergedLinkMetadata = ODataAtomWriterMetadataUtils.MergeLinkMetadata(linkMetadata, linkRelation, associationLinkUrl, navigationPropertyName, MimeConstants.MimeApplicationXml);
this.atomEntryMetadataSerializer.WriteAtomLink(mergedLinkMetadata, null /* etag*/);
}
/// <summary>
/// Writes a stream property to the ATOM payload
/// </summary>
/// <param name="streamProperty">The stream property to create the payload for.</param>
/// <param name="owningType">The <see cref="IEdmEntityType"/> instance for which the stream property defined on.</param>
/// <param name="duplicatePropertyNamesChecker">The checker instance for duplicate property names.</param>
/// <param name="projectedProperties">Set of projected properties, or null if all properties should be written.</param>
internal void WriteStreamProperty(
ODataProperty streamProperty,
IEdmEntityType owningType,
DuplicatePropertyNamesChecker duplicatePropertyNamesChecker,
ProjectedPropertiesAnnotation projectedProperties)
{
Debug.Assert(streamProperty != null, "Stream property must not be null.");
Debug.Assert(streamProperty.Value != null, "The media resource of the stream property must not be null.");
WriterValidationUtils.ValidatePropertyNotNull(streamProperty);
string propertyName = streamProperty.Name;
if (projectedProperties.ShouldSkipProperty(propertyName))
{
return;
}
WriterValidationUtils.ValidatePropertyName(propertyName);
duplicatePropertyNamesChecker.CheckForDuplicatePropertyNames(streamProperty);
IEdmProperty edmProperty = WriterValidationUtils.ValidatePropertyDefined(streamProperty.Name, owningType);
WriterValidationUtils.ValidateStreamReferenceProperty(streamProperty, edmProperty, this.Version, this.WritingResponse);
ODataStreamReferenceValue streamReferenceValue = (ODataStreamReferenceValue)streamProperty.Value;
WriterValidationUtils.ValidateStreamReferenceValue(streamReferenceValue, false /*isDefaultStream*/);
if (owningType != null && owningType.IsOpen && edmProperty == null)
{
ValidationUtils.ValidateOpenPropertyValue(streamProperty.Name, streamReferenceValue);
}
AtomStreamReferenceMetadata streamReferenceMetadata = streamReferenceValue.GetAnnotation <AtomStreamReferenceMetadata>();
string contentType = streamReferenceValue.ContentType;
string linkTitle = streamProperty.Name;
Uri readLink = streamReferenceValue.ReadLink;
if (readLink != null)
{
string readLinkRelation = AtomUtils.ComputeStreamPropertyRelation(streamProperty, false);
AtomLinkMetadata readLinkMetadata = streamReferenceMetadata == null ? null : streamReferenceMetadata.SelfLink;
AtomLinkMetadata mergedMetadata = ODataAtomWriterMetadataUtils.MergeLinkMetadata(readLinkMetadata, readLinkRelation, readLink, linkTitle, contentType);
this.atomEntryMetadataSerializer.WriteAtomLink(mergedMetadata, null /* etag */);
}
Uri editLink = streamReferenceValue.EditLink;
if (editLink != null)
{
string editLinkRelation = AtomUtils.ComputeStreamPropertyRelation(streamProperty, true);
AtomLinkMetadata editLinkMetadata = streamReferenceMetadata == null ? null : streamReferenceMetadata.EditLink;
AtomLinkMetadata mergedMetadata = ODataAtomWriterMetadataUtils.MergeLinkMetadata(editLinkMetadata, editLinkRelation, editLink, linkTitle, contentType);
this.atomEntryMetadataSerializer.WriteAtomLink(mergedMetadata, streamReferenceValue.ETag);
}
}
/// <summary>
/// Writes a feed link.
/// </summary>
/// <param name="feed">The feed that contains the link.</param>
/// <param name="relation">Relation attribute of the link.</param>
/// <param name="href">href attribute of the link.</param>
/// <param name="getLinkMetadata">Function to get the AtomLinkMetadata for the feed link.</param>
internal void WriteFeedLink(ODataFeed feed, string relation, Uri href, Func <AtomFeedMetadata, AtomLinkMetadata> getLinkMetadata)
{
AtomFeedMetadata feedMetadata = feed.GetAnnotation <AtomFeedMetadata>();
AtomLinkMetadata mergedLink = ODataAtomWriterMetadataUtils.MergeLinkMetadata(
getLinkMetadata(feedMetadata),
relation,
href,
null, /*title*/
null /*mediaType*/);
this.atomFeedMetadataSerializer.WriteAtomLink(mergedLink, null);
}
/// <summary>
/// Writes the self or edit link.
/// </summary>
/// <param name="link">Uri object for the link.</param>
/// <param name="linkMetadata">The atom link metadata for the link to specify title, type, hreflang and length of the link.</param>
/// <param name="linkRelation">Relationship value. Either "edit" or "self".</param>
private void WriteReadOrEditLink(
Uri link,
AtomLinkMetadata linkMetadata,
string linkRelation)
{
if (link != null)
{
AtomLinkMetadata mergedLinkMetadata = ODataAtomWriterMetadataUtils.MergeLinkMetadata(
linkMetadata,
linkRelation,
link,
null /* title */,
null /* media type */);
this.atomEntryMetadataSerializer.WriteAtomLink(mergedLinkMetadata, null /* etag */);
}
}
/// <summary>
/// Writes the edit-media link for an entry.
/// </summary>
/// <param name="mediaResource">The media resource representing the MR of the entry to write.</param>
internal void WriteEntryMediaEditLink(ODataStreamReferenceValue mediaResource)
{
Debug.Assert(mediaResource != null, "mediaResource != null");
Uri mediaEditLink = mediaResource.EditLink;
Debug.Assert(mediaEditLink != null || mediaResource.ETag == null, "The default stream edit link and etag should have been validated by now.");
if (mediaEditLink != null)
{
AtomStreamReferenceMetadata streamReferenceMetadata = mediaResource.GetAnnotation <AtomStreamReferenceMetadata>();
AtomLinkMetadata mediaEditMetadata = streamReferenceMetadata == null ? null : streamReferenceMetadata.EditLink;
AtomLinkMetadata mergedLinkMetadata =
ODataAtomWriterMetadataUtils.MergeLinkMetadata(
mediaEditMetadata,
AtomConstants.AtomEditMediaRelationAttributeValue,
mediaEditLink,
null /* title */,
null /* mediaType */);
this.atomEntryMetadataSerializer.WriteAtomLink(mergedLinkMetadata, mediaResource.ETag);
}
}
internal void WriteFeedMetadata(AtomFeedMetadata feedMetadata, ODataFeed feed, string updatedTime, out bool authorWritten)
{
Debug.Assert(feedMetadata != null, "Feed metadata must not be null!");
// <atom:id>text</atom:id>
// NOTE: this is the Id of the feed. For a regular feed this is stored on the feed itself;
// if used in the context of an <atom:source> element it is stored in metadata
Uri id = feed == null ? feedMetadata.SourceId : feed.Id;
this.WriteElementWithTextContent(
AtomConstants.AtomNamespacePrefix,
AtomConstants.AtomIdElementName,
AtomConstants.AtomNamespace,
id == null ? null : UriUtils.UriToString(id));
// <atom:title>text</atom:title>
// NOTE: write an empty element if no title is specified since the element is required
this.WriteTextConstruct(AtomConstants.AtomNamespacePrefix, AtomConstants.AtomTitleElementName, AtomConstants.AtomNamespace, feedMetadata.Title);
if (feedMetadata.Subtitle != null)
{
// <atom:subtitle>text</atom:subtitle>
this.WriteTextConstruct(AtomConstants.AtomNamespacePrefix, AtomConstants.AtomSubtitleElementName, AtomConstants.AtomNamespace, feedMetadata.Subtitle);
}
// <atom:updated>date</atom:updated>
// NOTE: the <updated> element is required and if not specified we use a single 'default/current' date/time for the whole payload.
string updated = feedMetadata.Updated.HasValue ? ODataAtomConvert.ToAtomString(feedMetadata.Updated.Value) : updatedTime;
this.WriteElementWithTextContent(
AtomConstants.AtomNamespacePrefix,
AtomConstants.AtomUpdatedElementName,
AtomConstants.AtomNamespace,
updated);
AtomLinkMetadata selfLinkMetadata = feedMetadata.SelfLink;
if (selfLinkMetadata != null)
{
AtomLinkMetadata mergedSelfLinkMetadata = ODataAtomWriterMetadataUtils.MergeLinkMetadata(
selfLinkMetadata,
AtomConstants.AtomSelfRelationAttributeValue,
null /* href */,
null /* title */,
null /* media type */);
this.WriteAtomLink(mergedSelfLinkMetadata, null /*etag*/);
}
IEnumerable <AtomLinkMetadata> links = feedMetadata.Links;
if (links != null)
{
foreach (AtomLinkMetadata link in links)
{
// DeltaLink is written from ODataFeed, so it shouldn't be written again from AtomFeedMetadata.
if (link.Relation != AtomConstants.AtomDeltaRelationAttributeValue)
{
// <atom:link>...</atom:link>
this.WriteAtomLink(link, null /* etag */);
}
}
}
IEnumerable <AtomCategoryMetadata> categories = feedMetadata.Categories;
if (categories != null)
{
foreach (AtomCategoryMetadata category in categories)
{
// <atom:category term="..." scheme="..." label="..."></atom:category>
this.WriteCategory(category);
}
}
Uri logo = feedMetadata.Logo;
if (logo != null)
{
// <atom:logo>Uri</atom:logo>
this.WriteElementWithTextContent(
AtomConstants.AtomNamespacePrefix,
AtomConstants.AtomLogoElementName,
AtomConstants.AtomNamespace,
this.UriToUrlAttributeValue(logo));
}
if (feedMetadata.Rights != null)
{
// <atom:rights>rights</atom:rights>
this.WriteTextConstruct(
AtomConstants.AtomNamespacePrefix,
AtomConstants.AtomRightsElementName,
AtomConstants.AtomNamespace,
feedMetadata.Rights);
}
IEnumerable <AtomPersonMetadata> contributors = feedMetadata.Contributors;
if (contributors != null)
{
foreach (AtomPersonMetadata contributor in contributors)
{
// <atom:contributor>contributor data</atom:contributor>
this.XmlWriter.WriteStartElement(AtomConstants.AtomNamespacePrefix, AtomConstants.AtomContributorElementName, AtomConstants.AtomNamespace);
this.WritePersonMetadata(contributor);
this.XmlWriter.WriteEndElement();
}
}
AtomGeneratorMetadata generator = feedMetadata.Generator;
if (generator != null)
{
// <atom:generator uri="..." version="...">name</atom:generator>
this.XmlWriter.WriteStartElement(AtomConstants.AtomNamespacePrefix, AtomConstants.AtomGeneratorElementName, AtomConstants.AtomNamespace);
if (generator.Uri != null)
{
this.XmlWriter.WriteAttributeString(AtomConstants.AtomGeneratorUriAttributeName, this.UriToUrlAttributeValue(generator.Uri));
}
if (!string.IsNullOrEmpty(generator.Version))
{
this.XmlWriter.WriteAttributeString(AtomConstants.AtomGeneratorVersionAttributeName, generator.Version);
}
ODataAtomWriterUtils.WriteString(this.XmlWriter, generator.Name);
this.XmlWriter.WriteEndElement();
}
Uri icon = feedMetadata.Icon;
if (icon != null)
{
// <atom:icon>Uri</atom:icon>
this.WriteElementWithTextContent(
AtomConstants.AtomNamespacePrefix,
AtomConstants.AtomIconElementName,
AtomConstants.AtomNamespace,
this.UriToUrlAttributeValue(icon));
}
IEnumerable <AtomPersonMetadata> authors = feedMetadata.Authors;
authorWritten = false;
if (authors != null)
{
foreach (AtomPersonMetadata author in authors)
{
// <atom:author>author data</atom:author>
authorWritten = true;
this.XmlWriter.WriteStartElement(AtomConstants.AtomNamespacePrefix, AtomConstants.AtomAuthorElementName, AtomConstants.AtomNamespace);
this.WritePersonMetadata(author);
this.XmlWriter.WriteEndElement();
}
}
}