/// <summary>
/// Cache the property and collection item enumerations needed in EPM mappings. We do this for syndication and custom
/// mappings.
/// </summary>
/// <param name="valueCache">The property value cache to use for caching.</param>
/// <param name="segments">The source path segments to cache.</param>
/// <param name="properties">The <see cref="ODataProperty"/> values to compute the segments against.</param>
private static void CacheEpmSourcePathSegments(EpmValueCache valueCache, List <EpmSourcePathSegment> segments, IEnumerable <ODataProperty> properties)
{
Debug.Assert(valueCache != null, "valueCache != null");
Debug.Assert(segments != null, "segments != null");
if (properties == null)
{
return;
}
foreach (EpmSourcePathSegment segment in segments)
{
if (segment.EpmInfo == null)
{
// No EPM info means that this is a complex value (cannot be mapped directly); cache it.
ODataComplexValue complexValue;
if (TryGetPropertyValue <ODataComplexValue>(properties, segment.PropertyName, out complexValue))
{
// Cache the properties of the complex property
IEnumerable <ODataProperty> subProperties = valueCache.CacheComplexValueProperties(complexValue);
CacheEpmSourcePathSegments(valueCache, segment.SubProperties, subProperties);
}
}
else
{
// Primitive collection item inside a complex value; nothing to do - we cached the property values already.
Debug.Assert(segment.SubProperties.Count == 0, "No sub-segments expected.");
}
}
}
private static void CacheEpmSourcePathSegments(EpmValueCache valueCache, List <EpmSourcePathSegment> segments, IEnumerable <ODataProperty> properties)
{
if (properties != null)
{
foreach (EpmSourcePathSegment segment in segments)
{
ODataComplexValue value2;
if ((segment.EpmInfo == null) && TryGetPropertyValue <ODataComplexValue>(properties, segment.PropertyName, out value2))
{
IEnumerable <ODataProperty> enumerable = valueCache.CacheComplexValueProperties(value2);
CacheEpmSourcePathSegments(valueCache, segment.SubProperties, enumerable);
}
}
}
}