/// <summary>
/// Writes a set of links (Uris) in response to a $links query; includes optional count and next-page-link information.
/// </summary>
/// <param name="jsonWriter">The <see cref="JsonWriter"/> to write to.</param>
/// <param name="baseUri">The base Uri used for writing.</param>
/// <param name="associatedEntityLinks">The set of associated entity links to write out.</param>
/// <param name="includeResultsWrapper">True if the 'results' wrapper should be included into the payload; otherwise false.</param>
private static void WriteAssociatedEntityLinks(JsonWriter jsonWriter, Uri baseUri, ODataAssociatedEntityLinks associatedEntityLinks, bool includeResultsWrapper)
{
DebugUtils.CheckNoExternalCallers();
Debug.Assert(jsonWriter != null, "jsonWriter != null");
Debug.Assert(associatedEntityLinks != null, "links != null");
if (includeResultsWrapper)
{
// {
jsonWriter.StartObjectScope();
}
if (associatedEntityLinks.InlineCount.HasValue)
{
Debug.Assert(includeResultsWrapper, "Expected 'includeResultsWrapper' to be true if a count is specified.");
jsonWriter.WriteName(JsonConstants.ODataCountName);
jsonWriter.WriteValue(associatedEntityLinks.InlineCount.Value);
}
if (includeResultsWrapper)
{
// "results":
jsonWriter.WriteDataArrayName();
}
jsonWriter.StartArrayScope();
IEnumerable <ODataAssociatedEntityLink> entityLinks = associatedEntityLinks.Links;
if (entityLinks != null)
{
foreach (ODataAssociatedEntityLink link in entityLinks)
{
WriteAssociatedEntityLink(jsonWriter, baseUri, link);
}
}
jsonWriter.EndArrayScope();
if (associatedEntityLinks.NextLink != null)
{
// "__next": ...
Debug.Assert(includeResultsWrapper, "Expected 'includeResultsWrapper' to be true if a next page link is specified.");
jsonWriter.WriteName(JsonConstants.ODataNextLinkName);
jsonWriter.WriteValue(UriUtils.UriToString(associatedEntityLinks.NextLink));
}
if (includeResultsWrapper)
{
jsonWriter.EndObjectScope();
}
}
/// <summary>
/// Writes a service document in JSON format.
/// </summary>
/// <param name="jsonWriter">The <see cref="JsonWriter"/> to write to.</param>
/// <param name="metadata">The metadata provider to use or null if no metadata is available.</param>
/// <param name="defaultWorkspace">The default workspace to write in the service document.</param>
internal static void WriteServiceDocument(
JsonWriter jsonWriter,
DataServiceMetadataProviderWrapper metadata,
ODataWorkspace defaultWorkspace)
{
DebugUtils.CheckNoExternalCallers();
Debug.Assert(jsonWriter != null, "jsonWriter != null");
Debug.Assert(defaultWorkspace != null, "defaultWorkspace != null");
IEnumerable <ODataResourceCollectionInfo> collections =
ValidationUtils.ValidateWorkspace(metadata == null ? null : metadata.ResourceSets, defaultWorkspace);
Debug.Assert(collections != null, "collections != null");
WriteDataWrapper(
jsonWriter,
true,
() =>
{
// "{"
jsonWriter.StartObjectScope();
// "EntitySets":
jsonWriter.WriteName(JsonConstants.ODataServiceDocumentEntitySetsName);
// "["
jsonWriter.StartArrayScope();
foreach (ODataResourceCollectionInfo collectionInfo in collections)
{
ValidationUtils.ValidateResourceCollectionInfo(collectionInfo);
// <collection name>
jsonWriter.WriteValue(collectionInfo.Name);
}
// "]"
jsonWriter.EndArrayScope();
// "}"
jsonWriter.EndObjectScope();
});
}
/// <summary>
/// Writes out the value of a MultiValue property.
/// </summary>
/// <param name="jsonWriter">The <see cref="JsonWriter"/> to write to.</param>
/// <param name="metadata">The metadata provider to use or null if no metadata is available.</param>
/// <param name="multiValue">The bag value to write.</param>
/// <param name="metadataType">The metadata type for the MultiValue.</param>
/// <param name="isOpenPropertyType">True if the type name belongs to an open property.</param>
/// <param name="version">The protocol version used for writing.</param>
private static void WriteMultiValue(
JsonWriter jsonWriter,
DataServiceMetadataProviderWrapper metadata,
ODataMultiValue multiValue,
ResourceType metadataType,
bool isOpenPropertyType,
ODataVersion version)
{
Debug.Assert(multiValue != null, "multiValue != null");
// Start the object scope which will represent the entire MultiValue instance
jsonWriter.StartObjectScope();
// "__metadata": { "type": "typename" }
// If the MultiValue has type information write out the metadata and the type in it.
string typeName = multiValue.TypeName;
// resolve the type name to the resource type; if no type name is specified we will use the
// type inferred from metadata
ResourceType multiValueType = MetadataUtils.ResolveTypeName(metadata, metadataType, ref typeName, ResourceTypeKind.MultiValue, isOpenPropertyType);
if (typeName != null)
{
// Write the __metadata object
jsonWriter.WriteName(JsonConstants.ODataMetadataName);
jsonWriter.StartObjectScope();
// "type": "typename"
jsonWriter.WriteName(JsonConstants.ODataMetadataTypeName);
jsonWriter.WriteValue(typeName);
// End the __metadata
jsonWriter.EndObjectScope();
}
// "results": [
// This represents the array of items in the MultiValue
jsonWriter.WriteDataArrayName();
jsonWriter.StartArrayScope();
// Iterate through the MultiValue items and write them out (treat null Items as an empty enumeration)
IEnumerable items = multiValue.Items;
if (items != null)
{
ResourceType expectedItemType = multiValueType == null ? null : ((MultiValueResourceType)multiValueType).ItemType;
foreach (object item in items)
{
ValidationUtils.ValidateMultiValueItem(item);
ODataComplexValue itemAsComplexValue = item as ODataComplexValue;
if (itemAsComplexValue != null)
{
WriteComplexValue(jsonWriter, metadata, itemAsComplexValue, expectedItemType, false, version);
}
else
{
ODataMultiValue itemAsMultiValue = item as ODataMultiValue;
if (itemAsMultiValue != null)
{
throw new ODataException(Strings.ODataWriter_NestedMultiValuesAreNotSupported);
}
else
{
WritePrimitiveValue(jsonWriter, item, expectedItemType);
}
}
}
}
// End the array scope which holds the items
jsonWriter.EndArrayScope();
// End the object scope which holds the entire MultiValue
jsonWriter.EndObjectScope();
}
/// <summary>
/// Writes a set of links (Uris) in response to a $links query; includes optional count and next-page-link information.
/// </summary>
/// <param name="jsonWriter">The <see cref="JsonWriter"/> to write to.</param>
/// <param name="baseUri">The base Uri used for writing.</param>
/// <param name="associatedEntityLinks">The set of associated entity links to write out.</param>
/// <param name="includeResultsWrapper">True if the 'results' wrapper should be included into the payload; otherwise false.</param>
private static void WriteAssociatedEntityLinks(JsonWriter jsonWriter, Uri baseUri, ODataAssociatedEntityLinks associatedEntityLinks, bool includeResultsWrapper)
{
DebugUtils.CheckNoExternalCallers();
Debug.Assert(jsonWriter != null, "jsonWriter != null");
Debug.Assert(associatedEntityLinks != null, "links != null");
if (includeResultsWrapper)
{
// {
jsonWriter.StartObjectScope();
}
if (associatedEntityLinks.InlineCount.HasValue)
{
Debug.Assert(includeResultsWrapper, "Expected 'includeResultsWrapper' to be true if a count is specified.");
jsonWriter.WriteName(JsonConstants.ODataCountName);
jsonWriter.WriteValue(associatedEntityLinks.InlineCount.Value);
}
if (includeResultsWrapper)
{
// "results":
jsonWriter.WriteDataArrayName();
}
jsonWriter.StartArrayScope();
IEnumerable<ODataAssociatedEntityLink> entityLinks = associatedEntityLinks.Links;
if (entityLinks != null)
{
foreach (ODataAssociatedEntityLink link in entityLinks)
{
WriteAssociatedEntityLink(jsonWriter, baseUri, link);
}
}
jsonWriter.EndArrayScope();
if (associatedEntityLinks.NextLink != null)
{
// "__next": ...
Debug.Assert(includeResultsWrapper, "Expected 'includeResultsWrapper' to be true if a next page link is specified.");
jsonWriter.WriteName(JsonConstants.ODataNextLinkName);
jsonWriter.WriteValue(UriUtils.UriToString(associatedEntityLinks.NextLink));
}
if (includeResultsWrapper)
{
jsonWriter.EndObjectScope();
}
}
/// <summary>
/// Writes out the value of a MultiValue property.
/// </summary>
/// <param name="jsonWriter">The <see cref="JsonWriter"/> to write to.</param>
/// <param name="metadata">The metadata provider to use or null if no metadata is available.</param>
/// <param name="multiValue">The bag value to write.</param>
/// <param name="metadataType">The metadata type for the MultiValue.</param>
/// <param name="isOpenPropertyType">True if the type name belongs to an open property.</param>
/// <param name="version">The protocol version used for writing.</param>
private static void WriteMultiValue(
JsonWriter jsonWriter,
DataServiceMetadataProviderWrapper metadata,
ODataMultiValue multiValue,
ResourceType metadataType,
bool isOpenPropertyType,
ODataVersion version)
{
Debug.Assert(multiValue != null, "multiValue != null");
// Start the object scope which will represent the entire MultiValue instance
jsonWriter.StartObjectScope();
// "__metadata": { "type": "typename" }
// If the MultiValue has type information write out the metadata and the type in it.
string typeName = multiValue.TypeName;
// resolve the type name to the resource type; if no type name is specified we will use the
// type inferred from metadata
ResourceType multiValueType = MetadataUtils.ResolveTypeName(metadata, metadataType, ref typeName, ResourceTypeKind.MultiValue, isOpenPropertyType);
if (typeName != null)
{
// Write the __metadata object
jsonWriter.WriteName(JsonConstants.ODataMetadataName);
jsonWriter.StartObjectScope();
// "type": "typename"
jsonWriter.WriteName(JsonConstants.ODataMetadataTypeName);
jsonWriter.WriteValue(typeName);
// End the __metadata
jsonWriter.EndObjectScope();
}
// "results": [
// This represents the array of items in the MultiValue
jsonWriter.WriteDataArrayName();
jsonWriter.StartArrayScope();
// Iterate through the MultiValue items and write them out (treat null Items as an empty enumeration)
IEnumerable items = multiValue.Items;
if (items != null)
{
ResourceType expectedItemType = multiValueType == null ? null : ((MultiValueResourceType)multiValueType).ItemType;
foreach (object item in items)
{
ValidationUtils.ValidateMultiValueItem(item);
ODataComplexValue itemAsComplexValue = item as ODataComplexValue;
if (itemAsComplexValue != null)
{
WriteComplexValue(jsonWriter, metadata, itemAsComplexValue, expectedItemType, false, version);
}
else
{
ODataMultiValue itemAsMultiValue = item as ODataMultiValue;
if (itemAsMultiValue != null)
{
throw new ODataException(Strings.ODataWriter_NestedMultiValuesAreNotSupported);
}
else
{
WritePrimitiveValue(jsonWriter, item, expectedItemType);
}
}
}
}
// End the array scope which holds the items
jsonWriter.EndArrayScope();
// End the object scope which holds the entire MultiValue
jsonWriter.EndObjectScope();
}
/// <summary>
/// Writes a service document in JSON format.
/// </summary>
/// <param name="jsonWriter">The <see cref="JsonWriter"/> to write to.</param>
/// <param name="metadata">The metadata provider to use or null if no metadata is available.</param>
/// <param name="defaultWorkspace">The default workspace to write in the service document.</param>
internal static void WriteServiceDocument(
JsonWriter jsonWriter,
DataServiceMetadataProviderWrapper metadata,
ODataWorkspace defaultWorkspace)
{
DebugUtils.CheckNoExternalCallers();
Debug.Assert(jsonWriter != null, "jsonWriter != null");
Debug.Assert(defaultWorkspace != null, "defaultWorkspace != null");
IEnumerable<ODataResourceCollectionInfo> collections =
ValidationUtils.ValidateWorkspace(metadata == null ? null : metadata.ResourceSets, defaultWorkspace);
Debug.Assert(collections != null, "collections != null");
WriteDataWrapper(
jsonWriter,
true,
() =>
{
// "{"
jsonWriter.StartObjectScope();
// "EntitySets":
jsonWriter.WriteName(JsonConstants.ODataServiceDocumentEntitySetsName);
// "["
jsonWriter.StartArrayScope();
foreach (ODataResourceCollectionInfo collectionInfo in collections)
{
ValidationUtils.ValidateResourceCollectionInfo(collectionInfo);
// <collection name>
jsonWriter.WriteValue(collectionInfo.Name);
}
// "]"
jsonWriter.EndArrayScope();
// "}"
jsonWriter.EndObjectScope();
});
}
