private static UInt128 GetHash(CosmosElement cosmosElement, UInt128 seed)
{
if (cosmosElement == null)
{
return(DistinctHash.GetUndefinedHash(seed));
}
return(cosmosElement.Accept(CosmosElementHasher.Singleton, seed));
}
/// <summary>
/// Gets the hash of a JToken given a seed.
/// </summary>
/// <param name="cosmosElement">The cosmos element to hash.</param>
/// <param name="seed">The seed to use.</param>
/// <returns>The hash of the JToken.</returns>
private static UInt128 GetHash(CosmosElement cosmosElement, UInt128 seed)
{
if (cosmosElement == null)
{
return(DistinctHash.GetUndefinedHash(seed));
}
CosmosElementType cosmosElementType = cosmosElement.Type;
UInt128 hash;
switch (cosmosElementType)
{
case CosmosElementType.Array:
hash = DistinctHash.GetArrayHash(cosmosElement as CosmosArray, seed);
break;
case CosmosElementType.Boolean:
hash = DistinctHash.GetBooleanHash((cosmosElement as CosmosBoolean).Value, seed);
break;
case CosmosElementType.Null:
hash = DistinctHash.GetNullHash(seed);
break;
case CosmosElementType.Number:
// TODO: we need to differentiate between the different number types.
CosmosNumber cosmosNumber = cosmosElement as CosmosNumber;
double number;
if (cosmosNumber.IsFloatingPoint)
{
number = cosmosNumber.AsFloatingPoint().Value;
}
else
{
number = cosmosNumber.AsInteger().Value;
}
hash = DistinctHash.GetNumberHash(number, seed);
break;
case CosmosElementType.Object:
hash = DistinctHash.GetObjectHash(cosmosElement as CosmosObject, seed);
break;
case CosmosElementType.String:
hash = DistinctHash.GetStringHash((cosmosElement as CosmosString).Value, seed);
break;
default:
throw new ArgumentException($"Unexpected {nameof(CosmosElementType)} : {cosmosElementType}");
}
return(hash);
}