protected virtual IEnumerable <string> GetParts()
{
if (Select.Any())
{
yield return("$select=" + String.Join(",", Select));
}
if (Expand.Any())
{
yield return("$expand=" + String.Join(",", Expand.Select(e => $"{e.PropertyName}({e})")));
}
if (Filter.Any())
{
yield return("$filter=" + String.Join(" and ", Filter));
}
}
/// <summary>
/// Create the <see cref="JoinTrie"/> from the paths in all the arguments
/// </summary>
private JoinTrie PrepareJoin(ArraySegment <string>?pathToCollection = null)
{
// construct the join tree
var allPaths = new List <string[]>();
if (Select != null)
{
allPaths.AddRange(Select.Select(e => e.Path));
}
if (Expand != null)
{
allPaths.AddRange(Expand.Select(e => e.Path));
}
if (Filter != null)
{
allPaths.AddRange(Filter.ColumnAccesses().Select(e => e.Path));
}
if (OrderBy != null)
{
allPaths.AddRange(OrderBy.ColumnAccesses().Select(e => e.Path));
}
if (pathToCollection != null)
{
var pathToCollectionEntity = new ArraySegment <string>(
pathToCollection.Value.Array,
pathToCollection.Value.Offset,
pathToCollection.Value.Count - 1);
allPaths.Add(pathToCollectionEntity.ToArray());
}
// This will represent the mapping from paths to symbols
return(JoinTrie.Make(ResultDescriptor, allPaths));
}
