private IDictionary<string, object> TryInterpretFilterExpressionAsKey(ODataExpression expression)
{
bool ok = false;
IDictionary<string, object> namedKeyValues = new Dictionary<string, object>();
if (!ReferenceEquals(expression, null))
{
ok = expression.ExtractEqualityComparisons(namedKeyValues);
}
return ok &&
this.Table.GetKeyNames().Count == namedKeyValues.Count() &&
this.Table.GetKeyNames().All(namedKeyValues.ContainsKey) ? namedKeyValues : null;
}
