/// <summary>
/// Returns true if the payload is correct for the top level non-entity target.
/// </summary>
/// <param name="jsonObject">json object representing the data in the payload.</param>
/// <param name="segment">information about the last segment in the request uri.</param>
/// <param name="resource">resource object as specified in the payload.</param>
/// <returns>returns true if the payload is correct for non-entity resource.</returns>
private static bool HandleTopLevelNonEntityProperty(JsonReader.JsonObjectRecords jsonObject, SegmentInfo segment, out object resource)
{
Debug.Assert(jsonObject != null, "jsonObject != null");
Debug.Assert(segment != null, "segment != null");
resource = null;
if (segment.TargetKind == RequestTargetKind.Primitive ||
segment.TargetKind == RequestTargetKind.OpenProperty ||
segment.TargetKind == RequestTargetKind.ComplexObject)
{
if (jsonObject.Count == 1 && jsonObject.Entries.TryGetValue(segment.Identifier, out resource))
{
// For open property, assume it to be a primitive or complex payload.
// If its targeting an entity, then the type must be specified
return(true);
}
else if (segment.TargetKind != RequestTargetKind.OpenProperty)
{
throw DataServiceException.CreateBadRequestError(Strings.BadRequestStream_InvalidResourceEntity);
}
}
// its an entity resource payload
return(false);
}
/// <summary>
/// Verifies if the given element value is a deferred element or not
/// </summary>
/// <param name="element">element value</param>
/// <returns>true if this value is a deferred content else returns false</returns>
private static bool IsDeferredElement(object element)
{
JsonReader.JsonObjectRecords records = element as JsonReader.JsonObjectRecords;
if (records != null && records.Count == 1 && records.OrderedKeys[0] == XmlConstants.JsonDeferredString)
{
return(true);
}
return(false);
}
/// <summary>
/// Get the resource referred by the uri in the payload
/// </summary>
/// <returns>resource referred by the uri in the payload.</returns>
protected override string GetLinkUriFromPayload()
{
// top level json content must be JsonObjectRecords, since we don't allow multiple inserts
// at the top level
JsonReader.JsonObjectRecords jsonObject = this.jsonReader.ReadValue() as JsonReader.JsonObjectRecords;
if (jsonObject == null)
{
throw DataServiceException.CreateBadRequestError(Strings.BadRequestStream_InvalidResourceEntity);
}
string uri = ReadUri(jsonObject.Entries);
if (String.IsNullOrEmpty(uri))
{
throw DataServiceException.CreateBadRequestError(Strings.BadRequest_MissingUriForLinkOperation);
}
return(uri);
}
/// <summary>
/// Gets the type and uri specified in the metadata object in the given json object.
/// </summary>
/// <param name="jsonObjectTable">jsonObject which contains the metadata information</param>
/// <param name="expectedType">expected type that this segment of the uri is targeted to</param>
/// <param name="topLevel">whether the segment represents the top level object.</param>
/// <param name="uri">uri as specified in the metadata object. If its not specified, this is set to null</param>
/// <param name="metadataElementSpecified">returns true if the metadata element was specified</param>
/// <returns>typename and uri as specified in the metadata object</returns>
private ResourceType GetTypeAndUriFromMetadata(
Dictionary <String, Object> jsonObjectTable,
ResourceType expectedType,
bool topLevel,
out string uri,
out bool metadataElementSpecified)
{
metadataElementSpecified = false;
// Get the metadata object
object metadataObject;
ResourceType targetType = expectedType;
bool typeNameSpecified = false;
uri = null;
if (jsonObjectTable.TryGetValue(XmlConstants.JsonMetadataString, out metadataObject))
{
metadataElementSpecified = true;
JsonReader.JsonObjectRecords metadata = metadataObject as JsonReader.JsonObjectRecords;
if (metadata == null)
{
throw DataServiceException.CreateBadRequestError(Strings.BadRequestStream_InvalidMetadataContent);
}
// Get the type information from the metadata object. if the type name is not specified,
// then return the expectedType as the target type
object objectTypeName;
if (metadata.Entries.TryGetValue(XmlConstants.JsonTypeString, out objectTypeName))
{
string typeName = objectTypeName as string;
if (string.IsNullOrEmpty(typeName))
{
throw DataServiceException.CreateBadRequestError(Strings.BadRequestStream_InvalidTypeMetadata);
}
// Resolve resource type name
targetType = this.Service.Provider.TryResolveResourceType(typeName);
if (targetType == null || targetType.ResourceTypeKind == ResourceTypeKind.Primitive)
{
throw DataServiceException.CreateBadRequestError(Strings.BadRequest_InvalidTypeName(typeName));
}
if (expectedType != null && !expectedType.IsAssignableFrom(targetType))
{
throw DataServiceException.CreateBadRequestError(Strings.BadRequest_InvalidTypeSpecified(typeName, expectedType.FullName));
}
typeNameSpecified = true;
}
uri = JsonDeserializer.ReadUri(metadata.Entries);
}
// Type information is optional for bind operations.
// Top level operations cannot be bind operations, since uri need to have $links
// for top level bind operations and that's a different code path.
// For bind operations, uri must be specified and nothing else should be specified.
bool bindOperation = !topLevel && uri != null && jsonObjectTable.Count == 1;
// type name must be specified for POST or PUT/MERGE operations.
if (!typeNameSpecified)
{
if (!bindOperation)
{
if (expectedType == null)
{
// For open properties, you must specify the type information
throw DataServiceException.CreateBadRequestError(Strings.BadRequestStream_MissingTypeInformationForOpenTypeProperties);
}
else if (this.Service.Provider.HasDerivedTypes(expectedType))
{
// For types that take part in inheritance, type information must be specified.
throw DataServiceException.CreateBadRequestError(Strings.BadRequest_TypeInformationMustBeSpecifiedForInhertiance);
}
}
else
{
// If the type name is not specified, we should set the type name to null, since in case of inheritance,
// we don't want to guess the type information.
targetType = null;
}
}
return(targetType);
}
/// <summary>
/// Populate the properties of the given resource
/// </summary>
/// <param name="jsonObject">JsonObjectRecords containing property name and values</param>
/// <param name="resource">instance of the resource whose properties needs to be populated</param>
/// <param name="parentResourceSet">resource set where <paramref name="resource"/> belongs to</param>
/// <param name="parentResourceType">resource type whose properties needs to be populated</param>
/// <returns>true if any properties were set; false otherwise.</returns>
private bool PopulateProperties(JsonReader.JsonObjectRecords jsonObject, object resource, ResourceSetWrapper parentResourceSet, ResourceType parentResourceType)
{
// Update all the properties specified in the payload.
// Don't touch the properties which are not specified. Its upto the provider to interpret
// the meaning of things which are not specified
bool changed = false;
List <ResourceProperty> navProperties = new List <ResourceProperty>();
List <object> navPropertyValues = new List <object>();
#region Handle Non-Nav Properties
foreach (string propertyName in jsonObject.OrderedKeys)
{
// Ignore the metadata property
if (propertyName == XmlConstants.JsonMetadataString)
{
continue;
}
// Check if the property exists and try and set the value
ResourceProperty resourceProperty = parentResourceType.TryResolvePropertyName(propertyName);
if (resourceProperty == null && parentResourceType.IsOpenType == false)
{
throw DataServiceException.CreateBadRequestError(Strings.BadRequest_InvalidPropertyNameSpecified(propertyName, parentResourceType.FullName));
}
// Get the property value, set it appropriately, and mark the object as changed.
object propertyValue = jsonObject.Entries[propertyName];
bool existingRelationship;
// If its a open property
if (resourceProperty == null)
{
this.HandleOpenTypeProperties(resource, propertyName, propertyValue);
changed = true;
}
else if (resourceProperty.TypeKind == ResourceTypeKind.ComplexType)
{
SegmentInfo segmentInfo = CreateSegment(resourceProperty, resourceProperty.Name, null, true /* singleResult */);
segmentInfo.TargetKind = RequestTargetKind.ComplexObject;
propertyValue = this.CreateObject(propertyValue, segmentInfo, false /*topLevel*/, out existingRelationship);
SetPropertyValue(resourceProperty, resource, propertyValue, ContentFormat.Json, this.Service);
changed = true;
}
else if (resourceProperty.TypeKind == ResourceTypeKind.Primitive)
{
// Ignoring the value of key properties in PUT payload
if (!this.Update || !resourceProperty.IsOfKind(ResourcePropertyKind.Key))
{
SetPropertyValue(resourceProperty, resource, propertyValue, ContentFormat.Json, this.Service);
}
changed = true;
}
else
{
Debug.Assert(ResourceTypeKind.EntityType == resourceProperty.TypeKind, "only expecting nav properties");
if (IsDeferredElement(propertyValue))
{
// Skip the deferred element
continue;
}
else
{
navProperties.Add(resourceProperty);
navPropertyValues.Add(propertyValue);
}
}
}
#endregion Non-Navigation Properties
#region Handle Navigation Properties
Debug.Assert(navProperties.Count == navPropertyValues.Count, "nav properties and nav property values count must be the same");
// The reason why we need to do this is so that we can gaurantee that the nav properties are getting set at the end.
// This is nice, since we already do this in the atom deserializer. Hence its consistent. Second, we wanted to
// give a gaurantee that when FK and nav properties are specified in the payload, nav properties always win.
for (int i = 0; i < navProperties.Count; i++)
{
this.HandleNavigationProperty(parentResourceSet, parentResourceType, resource, navProperties[i], navPropertyValues[i]);
changed = true;
}
#endregion Handle Navigation Properties
return(changed);
}