// Translate the node in ODL path to string literal.
private string TranslateNode(object node)
{
if (node == null)
{
throw Error.ArgumentNull("node");
}
Semantic.ConstantNode constantNode = node as Semantic.ConstantNode;
if (constantNode != null)
{
if (_enableUriTemplateParsing)
{
Semantic.UriTemplateExpression uriTemplateExpression = constantNode.Value as Semantic.UriTemplateExpression;
if (uriTemplateExpression != null)
{
return(uriTemplateExpression.LiteralText);
}
}
// Make the enum prefix free to work.
ODataEnumValue enumValue = constantNode.Value as ODataEnumValue;
if (enumValue != null)
{
return(ODataUriUtils.ConvertToUriLiteral(enumValue, ODataVersion.V4));
}
return(constantNode.LiteralText);
}
Semantic.ConvertNode convertNode = node as Semantic.ConvertNode;
if (convertNode != null)
{
return(TranslateNode(convertNode.Source));
}
Semantic.ParameterAliasNode parameterAliasNode = node as Semantic.ParameterAliasNode;
if (parameterAliasNode != null)
{
return(TranslateParameterAlias(parameterAliasNode.Alias));
}
throw Error.NotSupported(
SRResources.CannotRecognizeNodeType,
typeof(ODataPathSegmentTranslator),
node.GetType().FullName);
}
/// <summary>
/// Translate parameter alias node to corresponding single value node.
/// </summary>
/// <param name="node">The node to be translated.</param>
/// <param name="parameterAliasNodes">The parameter alias node mapping.</param>
/// <returns>The translated node.</returns>
public static Semantic.SingleValueNode TranslateParameterAlias(
Semantic.SingleValueNode node,
IDictionary <string, Semantic.SingleValueNode> parameterAliasNodes)
{
if (node == null)
{
throw Error.ArgumentNull("node");
}
if (parameterAliasNodes == null)
{
throw Error.ArgumentNull("parameterAliasNodes");
}
Semantic.ParameterAliasNode parameterAliasNode = node as Semantic.ParameterAliasNode;
if (parameterAliasNode == null)
{
return(node);
}
Semantic.SingleValueNode singleValueNode;
if (parameterAliasNodes.TryGetValue(parameterAliasNode.Alias, out singleValueNode) &&
singleValueNode != null)
{
if (singleValueNode is Semantic.ParameterAliasNode)
{
singleValueNode = TranslateParameterAlias(singleValueNode, parameterAliasNodes);
}
return(singleValueNode);
}
// Parameter alias value is assumed to be null if it is not found.
// Do not need to translate the parameter alias node from the query string
// because this method only deals with the parameter alias node mapping from ODL parser.
return(null);
}
