/// <summary>
/// Writes the metadata properties for a resource which can only occur at the start.
/// </summary>
/// <param name="resourceState">The resource state for which to write the metadata properties.</param>
internal void WriteResourceStartMetadataProperties(IODataJsonLightWriterResourceState resourceState)
{
Debug.Assert(resourceState != null, "resourceState != null");
ODataResourceBase resource = resourceState.Resource;
// expectedResourceTypeName : if expected is of base type. but the resource real type is derived,
// we need to set the resource type name.
// Writing response: expected type info can be identical with context uri info.
// Writing request: contextUri may not be provided, we always use the type from metadata info.
// From model: if the resource can be found in model.
// From serializationInfo: if user set the serializationInfo for the resource.
string expectedResourceTypeName = null;
if (this.WritingResponse)
{
expectedResourceTypeName = resourceState.GetOrCreateTypeContext(this.WritingResponse).ExpectedResourceTypeName;
}
else
{
if (resourceState.ResourceTypeFromMetadata == null)
{
expectedResourceTypeName = resourceState.SerializationInfo == null
? null
: resourceState.SerializationInfo.ExpectedTypeName;
}
else
{
expectedResourceTypeName = resourceState.ResourceTypeFromMetadata.FullTypeName();
}
}
// Write the "@odata.type": "typename"
string typeName = this.JsonLightOutputContext.TypeNameOracle.GetResourceTypeNameForWriting(
expectedResourceTypeName,
resource,
resourceState.IsUndeclared);
if (typeName != null && !string.Equals(typeName, ODataConstants.ContextUriFragmentUntyped, StringComparison.Ordinal))
{
this.ODataAnnotationWriter.WriteODataTypeInstanceAnnotation(typeName);
}
// Write the "@odata.id": "Entity Id"
Uri id;
if (resource.MetadataBuilder.TryGetIdForSerialization(out id))
{
this.ODataAnnotationWriter.WriteInstanceAnnotationName(ODataAnnotationNames.ODataId);
if (id != null && !resource.HasNonComputedId)
{
id = this.MetadataDocumentBaseUri.MakeRelativeUri(id);
}
this.JsonWriter.WriteValue(id == null ? null : this.UriToString(id));
}
// Write the "@odata.etag": "ETag value"
string etag = resource.ETag;
if (etag != null)
{
this.ODataAnnotationWriter.WriteInstanceAnnotationName(ODataAnnotationNames.ODataETag);
this.JsonWriter.WriteValue(etag);
}
}
/// <summary>
/// Writes the metadata properties for a resource which can only occur at the start.
/// </summary>
/// <param name="resourceState">The resource state for which to write the metadata properties.</param>
internal void WriteResourceStartMetadataProperties(IODataJsonLightWriterResourceState resourceState)
{
Debug.Assert(resourceState != null, "resourceState != null");
ODataResource resource = resourceState.Resource;
// expectedResourceTypeName : if expected is of base type. but the resource real type is derived,
// we need to set the resource type name.
// Writing response: expected type info can be identical with context uri info.
// Writing request: contextUri may not be provided, we always use the type from metadata info.
// From model: if the resource can be found in model.
// From serializationInfo: if user set the serializationInfo for the resource.
string expectedResourceTypeName = null;
if (this.WritingResponse)
{
expectedResourceTypeName = resourceState.GetOrCreateTypeContext(this.WritingResponse).ExpectedResourceTypeName;
}
else
{
if (resourceState.ResourceTypeFromMetadata == null)
{
expectedResourceTypeName = resourceState.SerializationInfo == null
? null
: resourceState.SerializationInfo.ExpectedTypeName;
}
else
{
expectedResourceTypeName = resourceState.ResourceTypeFromMetadata.FullTypeName();
}
}
// Write the "@odata.type": "typename"
string typeName = this.JsonLightOutputContext.TypeNameOracle.GetResourceTypeNameForWriting(
expectedResourceTypeName,
resource,
resourceState.IsUndeclared);
if (typeName != null)
{
this.ODataAnnotationWriter.WriteODataTypeInstanceAnnotation(typeName);
}
// uncomment the below if decide to expose OData information via .InstanceAnnotations
// else
// {
// // close path for roundtrip :
// // write it to the wire if @odata.type is ever read from payload into Resource.InstanceAnnotations.
// ODataInstanceAnnotation odataTypeAnnotation = resource.InstanceAnnotations.FirstOrDefault(
// s => string.Equals(ODataAnnotationNames.ODataType, s.Name, StringComparison.OrdinalIgnoreCase));
// if (odataTypeAnnotation != null)
// {
// string rawTypeName = (string)odataTypeAnnotation.Value.FromODataValue();
// this.ODataAnnotationWriter.WriteODataTypeInstanceAnnotation(rawTypeName, writeRawValue: true);
// }
// }
// Write the "@odata.id": "Entity Id"
Uri id;
if (resource.MetadataBuilder.TryGetIdForSerialization(out id))
{
this.ODataAnnotationWriter.WriteInstanceAnnotationName(ODataAnnotationNames.ODataId);
if (id != null && !resource.HasNonComputedId)
{
id = this.MetadataDocumentBaseUri.MakeRelativeUri(id);
}
this.JsonWriter.WriteValue(id == null ? null : this.UriToString(id));
}
// Write the "@odata.etag": "ETag value"
string etag = resource.ETag;
if (etag != null)
{
this.ODataAnnotationWriter.WriteInstanceAnnotationName(ODataAnnotationNames.ODataETag);
this.JsonWriter.WriteValue(etag);
}
}