/// <inheritdoc />
protected override object ExecuteToken(ScriptContext context)
{
object host = hosttoken.Execute(context);
if (host == null)
{
throw new ScriptRuntimeException($"'{hosttoken}' results in null", this);
}
if (host is IExternalMethod externmethod && MethodName.ToLower() == "invoke")
{
try {
return(externmethod.Invoke(context.Arguments, Parameters.Select(a => a.Execute(context)).ToArray()));
}
catch (Exception e) {
throw new ScriptRuntimeException($"Error calling external method '{externmethod}'", this, e);
}
}
MethodInfo[] methods = host.GetType().GetMethods().Where(m => m.Name.ToLower() == methodname && MethodOperations.MatchesParameterCount(m, parameters)).ToArray();
object[] parametervalues = parameters.Select(p => p.Execute(context)).ToArray();
List <ReferenceParameter> references = new List <ReferenceParameter>();
for (int i = 0; i < parameters.Length; ++i)
{
if (!(parameters[i] is Reference r))
{
continue;
}
references.Add(new ReferenceParameter(i, r));
}
Tuple <MethodInfo, int>[] evaluation = methods.Select(m => MethodOperations.GetMethodMatchValue(m, parametervalues)).Where(e => e.Item2 >= 0).OrderBy(m => m.Item2).ToArray();
if (evaluation.Length > 0)
{
return(MethodOperations.CallMethod(this, host, evaluation[0].Item1, parametervalues, context, references));
}
if (extensions != null)
{
Type extensionbase = host.GetType();
while (extensionbase != null)
{
Type lookuptype = extensionbase;
if (lookuptype.IsGenericType)
{
lookuptype = lookuptype.GetGenericTypeDefinition();
}
methods = extensions.GetExtensions(lookuptype).Where(m => m.Name.ToLower() == methodname && MethodOperations.MatchesParameterCount(m, parameters, true)).ToArray();
evaluation = methods.Select(m => MethodOperations.GetMethodMatchValue(m, parametervalues, true)).OrderBy(m => m.Item2).ToArray();
if (evaluation.Length > 0)
{
MethodInfo method = evaluation[0].Item1;
if (method.IsGenericMethodDefinition)
{
method = method.MakeGenericMethod(extensionbase.GetGenericArguments());
}
return(MethodOperations.CallMethod(this, host, method, parametervalues, context, references, true));
}
if (extensionbase == typeof(object))
{
break;
}
extensionbase = extensionbase.BaseType;
}
foreach (Type interfacetype in host.GetType().GetInterfaces().OrderBy(i => i.IsGenericType ? 0 : 1))
{
Type lookuptype = interfacetype;
if (lookuptype.IsGenericType)
{
lookuptype = lookuptype.GetGenericTypeDefinition();
}
methods = extensions.GetExtensions(lookuptype).Where(m => m.Name.ToLower() == methodname && MethodOperations.MatchesParameterCount(m, parameters, true)).ToArray();
evaluation = methods.Select(m => MethodOperations.GetMethodMatchValue(m, parametervalues, true)).OrderBy(m => m.Item2).ToArray();
if (evaluation.Length > 0)
{
MethodInfo method = evaluation[0].Item1;
if (method.IsGenericMethodDefinition)
{
method = method.MakeGenericMethod(interfacetype.GetGenericArguments());
}
return(MethodOperations.CallMethod(this, host, method, parametervalues, context, references, true));
}
}
}
throw new ScriptRuntimeException($"Method '{methodname}' matching the parameters '({string.Join(",", parametervalues)})' not found on type {host.GetType().Name}", this);
}