/// <summary>
/// Parse the <see cref="JsonElement"/> to a <see cref="IEdmReference"/>.
/// </summary>
/// <param name="url">The reference Url string.</param>
/// <param name="element">The input JSON element.</param>
/// <param name="context">The parser context.</param>
/// <returns>null or parsed <see cref="IEdmReference"/>.</returns>
internal static IEdmReference ParseReference(string url, JsonElement element, JsonParserContext context)
{
// The value of each reference object is an object.
if (!element.ValidateValueKind(JsonValueKind.Object, context))
{
return(null);
}
IList <IEdmInclude> includes = null;
IList <IEdmIncludeAnnotations> includeAnnotations = null;
element.ParseAsObject(context, (propertyName, propertyValue) =>
{
// The reference object MAY contain the members $Include and $IncludeAnnotations as well as annotations.
switch (propertyName)
{
case "$Include":
// The value of $Include is an array.
// Array items are objects that MUST contain the member $Namespace and MAY contain the member $Alias.
includes = propertyValue.ParseAsArray(context, ParseInclude);
break;
case "$IncludeAnnotations":
// The value of $IncludeAnnotations is an array.
// Array items are objects that MUST contain the member $TermNamespace and MAY contain the members $Qualifier and $TargetNamespace.
includeAnnotations = propertyValue.ParseAsArray(context, ParseIncludeAnnotations);
break;
default:
// The reference objects MAY contain annotations.However, EdmReference doesn't support annotation.
// So, skip the annotation.
context.ReportError(EdmErrorCode.UnexpectedElement, Strings.CsdlJsonParser_UnexpectedJsonMember(context.Path, propertyValue.ValueKind));
break;
}
});
EdmReference edmReference = new EdmReference(new Uri(url, UriKind.RelativeOrAbsolute));
includes.ForEach(i => edmReference.AddInclude(i));
includeAnnotations.ForEach(i => edmReference.AddIncludeAnnotations(i));
return(edmReference);
}
/// <summary>
/// TODO: use XmlDocumentParser
/// </summary>
private void ParseReferenceElement()
{
// read 'Uri' attribute
EdmReference result = new EdmReference(new Uri(this.GetAttributeValue(null, CsdlConstants.Attribute_Uri), UriKind.RelativeOrAbsolute));
if (this.reader.IsEmptyElement)
{
this.reader.Read();
this.edmReferences.Add(result);
return;
}
this.reader.Read();
while (this.reader.NodeType != XmlNodeType.EndElement)
{
while (this.reader.NodeType == XmlNodeType.Whitespace && this.reader.Read())
{ // read white spaces. can be an extension method.
}
if (this.reader.NodeType != XmlNodeType.Element)
{
break;
}
if (this.reader.LocalName == CsdlConstants.Element_Include)
{
// parse: <edmx:Include Alias="IoTDeviceModel" Namespace="Microsoft.IntelligentSystems.DeviceModel.Vocabulary.V1"/>
IEdmInclude tmp = new EdmInclude(this.GetAttributeValue(null, CsdlConstants.Attribute_Alias), this.GetAttributeValue(null, CsdlConstants.Attribute_Namespace));
result.AddInclude(tmp);
}
else if (this.reader.LocalName == CsdlConstants.Element_IncludeAnnotations)
{
// parse: <edmx:IncludeAnnotations TermNamespace="org.example.hcm" Qualifier="Tablet" TargetNamespace="com.contoso.Person" />
IEdmIncludeAnnotations tmp = new EdmIncludeAnnotations(this.GetAttributeValue(null, CsdlConstants.Attribute_TermNamespace), this.GetAttributeValue(null, CsdlConstants.Attribute_Qualifier), this.GetAttributeValue(null, CsdlConstants.Attribute_TargetNamespace));
result.AddIncludeAnnotations(tmp);
}
else if (this.reader.LocalName == CsdlConstants.Element_Annotation)
{
this.reader.Skip();
this.RaiseError(EdmErrorCode.UnexpectedXmlElement, Edm.Strings.XmlParser_UnexpectedElement(this.reader.LocalName));
continue;
}
else
{
this.RaiseError(EdmErrorCode.UnexpectedXmlElement, Edm.Strings.XmlParser_UnexpectedElement(this.reader.LocalName));
}
if (!this.reader.IsEmptyElement)
{
this.reader.Read();
while (this.reader.NodeType == XmlNodeType.Whitespace && this.reader.Read())
{ // read white spaces. can be an extension method.
}
Debug.Assert(this.reader.NodeType == XmlNodeType.EndElement, "The XmlReader should be at the end of element");
}
this.reader.Read();
}
Debug.Assert(this.reader.NodeType == XmlNodeType.EndElement, "The XmlReader should be at the end of element");
this.reader.Read();
this.edmReferences.Add(result);
}