/// <summary>
/// Build the expand clause for a given level in the selectExpandClause
/// </summary>
/// <param name="selectExpandClause">the current level select expand clause</param>
/// <returns>the select and expand segment for context url in this level.</returns>
private static string CreateSelectExpandContextUriSegment(SelectExpandClause selectExpandClause)
{
if (selectExpandClause != null)
{
string contextUri;
selectExpandClause.Traverse(ProcessSubExpand, CombineSelectAndExpandResult, out contextUri);
if (!string.IsNullOrEmpty(contextUri))
{
return ODataConstants.ContextUriProjectionStart + contextUri + ODataConstants.ContextUriProjectionEnd;
}
}
return string.Empty;
}
/// <summary>Create SelectedPropertiesNode from SelectExpandClause.</summary>
/// <param name="selectExpandClause">The SelectExpandClause representing $select and $expand clauses.</param>
/// <returns>SelectedPropertiesNode generated using <paramref name="selectExpandClause"/></returns>
private static SelectedPropertiesNode CreateFromSelectExpandClause(SelectExpandClause selectExpandClause)
{
SelectedPropertiesNode node;
selectExpandClause.Traverse(ProcessSubExpand, CombineSelectAndExpandResult, out node);
return node;
}