/// <summary>Tries to create a key segment for the given filter if it is non empty.</summary>
/// <param name="previous">Segment on which to compose.</param>
/// <param name="previousKeySegment">The parent node's key segment.</param>
/// <param name="parenthesisExpression">Parenthesis expression of segment.</param>
/// <param name="keySegment">The key segment that was created if the key was non-empty.</param>
/// <param name="enableUriTemplateParsing">Whether Uri template parsing is enabled.</param>
/// <param name="resolver">The resolver to use.</param>
/// <returns>Whether the key was non-empty.</returns>
internal static bool TryCreateKeySegmentFromParentheses(ODataPathSegment previous, KeySegment previousKeySegment, string parenthesisExpression, out ODataPathSegment keySegment, bool enableUriTemplateParsing = false, ODataUriResolver resolver = null)
{
Debug.Assert(parenthesisExpression != null, "parenthesisExpression != null");
Debug.Assert(previous != null, "segment!= null");
if (resolver == null)
{
resolver = ODataUriResolver.Default;
}
if (previous.SingleResult)
{
throw ExceptionUtil.CreateSyntaxError();
}
SegmentArgumentParser key;
if (!SegmentArgumentParser.TryParseKeysFromUri(parenthesisExpression, out key, enableUriTemplateParsing))
{
throw ExceptionUtil.CreateSyntaxError();
}
// People/NS.Employees() is OK, just like People() is OK
if (key.IsEmpty)
{
keySegment = null;
return(false);
}
keySegment = CreateKeySegment(previous, previousKeySegment, key, resolver);
return(true);
}
/// <summary>Tries to create a key segment for the given filter if it is non empty.</summary>
/// <param name="previous">Segment on which to compose.</param>
/// <param name="previousKeySegment">The parent node's key segment.</param>
/// <param name="parenthesisExpression">Parenthesis expression of segment.</param>
/// <param name="keySegment">The key segment that was created if the key was non-empty.</param>
/// <param name="enableUriTemplateParsing">Whether Uri template parsing is enabled.</param>
/// <returns>Whether the key was non-empty.</returns>
internal static bool TryCreateKeySegmentFromParentheses(ODataPathSegment previous, KeySegment previousKeySegment, string parenthesisExpression, out ODataPathSegment keySegment, bool enableUriTemplateParsing = false)
{
Debug.Assert(parenthesisExpression != null, "parenthesisExpression != null");
Debug.Assert(previous != null, "segment!= null");
ExceptionUtil.ThrowSyntaxErrorIfNotValid(!previous.SingleResult);
SegmentArgumentParser key;
ExceptionUtil.ThrowSyntaxErrorIfNotValid(SegmentArgumentParser.TryParseKeysFromUri(parenthesisExpression, out key, enableUriTemplateParsing));
// People/NS.Employees() is OK, just like People() is OK
if (key.IsEmpty)
{
keySegment = null;
return(false);
}
keySegment = CreateKeySegment(previous, previousKeySegment, key);
return(true);
}