/// <summary>
/// Parses the segments of a path in the select clause.
/// </summary>
/// <param name="segments">The segments of the select path.</param>
/// <param name="index">The index of the segment to parse.</param>
private void ParsePathSegment(string[] segments, int index)
{
Debug.Assert(segments != null, "segments != null");
Debug.Assert(index >= 0 && index < segments.Length, "index >= 0 && index < segments.Length");
// NOTE: Each path is the name of a property or a series of property names
// separated by slash ('/'). The special star ('*') character is only supported at the end of a path.
string currentSegment = segments[index].Trim();
if (this.selectedProperties == null)
{
this.selectedProperties = CreateSelectedPropertiesHashSet();
}
bool isStar = string.CompareOrdinal(StarSegment, currentSegment) == 0;
bool isLastSegment = index == segments.Length - 1;
if (!isLastSegment)
{
if (isStar)
{
throw new ODataException(ODataErrorStrings.SelectedPropertiesNode_StarSegmentNotLastSegment);
}
SelectedPropertiesNode childNode = this.EnsureChildAnnotation(currentSegment);
childNode.ParsePathSegment(segments, index + 1);
}
else
{
this.selectedProperties.Add(currentSegment);
}
this.hasWildcard |= isStar;
}
/// <summary>
/// Parses the segments of a path in the select clause.
/// </summary>
/// <param name="segments">The segments of the select path.</param>
/// <param name="index">The index of the segment to parse.</param>
private void ParsePathSegment(string[] segments, int index)
{
Debug.Assert(segments != null, "segments != null");
Debug.Assert(index >= 0 && index < segments.Length, "index >= 0 && index < segments.Length");
// NOTE: Each path is the name of a property or a series of property names
// separated by slash ('/'). The special star ('*') character is only supported at the end of a path.
string currentSegment = segments[index].Trim();
bool isStar = string.CompareOrdinal(StarSegment, currentSegment) == 0;
int idxLP = currentSegment.IndexOf('(');
if (idxLP != -1 && IsValidExpandToken(currentSegment))
{
string token = currentSegment.Substring(0, idxLP);
SelectedPropertiesNode childNode = this.EnsureChildNode(token, /* isExpandedNavigationProperty */ true);
childNode.edmModel = this.edmModel;
if (idxLP < currentSegment.Length - 2)
{
string clause = currentSegment.Substring(idxLP + 1, currentSegment.Length - idxLP - 2).Trim();
if (!String.IsNullOrEmpty(clause))
{
// Setup the edm model and structured type for the child node before start parsing the select clause.
IEdmNavigationProperty navProp = this.structuredType?.DeclaredNavigationProperties()
?.SingleOrDefault(p => p.Name.Equals(token, StringComparison.Ordinal));
if (navProp?.Type != null)
{
// navigation property could be structural type or collection of structural type.
childNode.structuredType = navProp.Type.Definition.AsElementType() as IEdmStructuredType;
}
childNode.Parse(clause);
}
}
else
{
childNode.selectionType = SelectionType.EntireSubtree;
}
}
else
{
bool isLastSegment = index == segments.Length - 1;
if (!isLastSegment)
{
if (isStar)
{
throw new ODataException(ODataErrorStrings.SelectedPropertiesNode_StarSegmentNotLastSegment);
}
SelectedPropertiesNode childNode = this.EnsureChildNode(currentSegment, false);
childNode.ParsePathSegment(segments, index + 1);
}
else
{
if (this.selectedProperties == null)
{
this.selectedProperties = CreateSelectedPropertiesHashSet();
}
this.selectedProperties.Add(currentSegment);
}
}
this.hasWildcard |= isStar;
}
