public JmesPathFunctionExpression(IFunctionRepository repository, string name, params JmesPathExpression[] expressions)
{
if (!repository.Contains(name))
{
throw new Exception($"Error: unknown-function, no function named {name} has been registered.");
}
function_ = repository[name];
var variadic = function_.Variadic;
var expected = function_.MinArgumentCount;
var actual = expressions?.Length;
if (actual < expected || (!variadic && actual > expected))
{
var more = variadic ? "or more " : "";
var only = variadic ? "only " : "";
var report = actual == 0 ? "none" : $"{only}{actual}";
var plural = expected > 1 ? "s" : "";
throw new Exception($"Error: invalid-arity, the function {name} expects {expected} argument{plural} {more}but {report} were supplied.");
}
name_ = name;
expressions_ = expressions;
}
public bool Contains(string id)
{
return(_functionRepository.Contains(x => x.Id == id));
}