/// <summary>
/// Returns the underlying <see cref="JsonPlusLiteralType"/> of a literal value.
/// </summary>
/// <exception cref="JsonPlusException">The <see cref="Type"/> property must be of type <see cref="JsonPlusType.Literal"/>.</exception>
/// <returns>
/// The underlying <see cref="JsonPlusLiteralType"/> of an instance of this <see cref="JsonPlusValue"/> which is a literal value.
/// </returns>
public virtual JsonPlusLiteralType GetLiteralType()
{
if (Type != JsonPlusType.Literal)
{
throw new JsonPlusException(RS.ExpectLiteralType);
}
if (Count > 1)
{
bool containsSubstitution = false;
foreach (IJsonPlusNode node in Children)
{
if (node is JsonPlusSubstitution)
{
containsSubstitution = true;
break;
}
}
if (containsSubstitution)
{
return(JsonPlusLiteralType.String);
}
if (IsTimeSpan())
{
return(JsonPlusLiteralType.TimeSpan);
}
if (IsByteSize())
{
return(JsonPlusLiteralType.ByteSize);
}
return(JsonPlusLiteralType.String);
}
if (Count == 0)
{
return(JsonPlusLiteralType.Null);
}
// timespan and bytesize expressions will have at least 2 children, so here onwards node cannot be either.
IJsonPlusNode firstChild = Children[0];
if (firstChild is JsonPlusSubstitution)
{
JsonPlusValue substChild = ((JsonPlusSubstitution)firstChild).ResolvedValue;
if (substChild.Type != JsonPlusType.Literal)
{
throw new JsonPlusException(string.Format(RS.InternalErrorStopCode, "ONLY_SUBST_TYPE_NOT_LITERAL"));
}
return(substChild.GetLiteralType());
}
if (firstChild is NullValue)
{
return(JsonPlusLiteralType.Null);
}
else if (firstChild is BooleanValue)
{
return(JsonPlusLiteralType.Boolean);
}
else if (firstChild is DecimalValue)
{
return(JsonPlusLiteralType.Decimal);
}
else if (firstChild is IntegerValue)
{
return(JsonPlusLiteralType.Integer);
}
else if (firstChild is HexadecimalValue)
{
return(JsonPlusLiteralType.Hexadecimal);
}
else if (firstChild is OctetValue)
{
return(JsonPlusLiteralType.Octet);
}
else if (firstChild is UnquotedStringValue)
{
return(JsonPlusLiteralType.UnquotedString);
}
else if (firstChild is QuotedStringValue)
{
return(JsonPlusLiteralType.QuotedString);
}
else if (firstChild is TripleQuotedStringValue)
{
return(JsonPlusLiteralType.TripleQuotedString);
}
else if (firstChild is WhitespaceValue)
{
return(JsonPlusLiteralType.Whitespace);
}
else
{
throw new JsonPlusException(string.Format(RS.UnknownLiteralToken, firstChild.GetType().ToString()));
}
}