/// <summary>
/// Creates an enabling condition for an action method.
/// If the action method takes no input parameters or parameterless = true
/// then mayDependOnState should be true,
/// otherwise the condition will either always hold or never hold.
/// </summary>
internal EnablingCondition(ActionInfo actionInfo, bool mayDependOnState, bool parameterless)
{
this.actionInfo = actionInfo;
Type type = actionInfo.model.GetType();
Type[] paramTypes = (parameterless ? Type.EmptyTypes : actionInfo.inputParameterTypes);
foreach (ModelRequirementAttribute attr in ActionInfo.GetModelRequirementAttributes(actionInfo.method))
{
MethodInfo pred = type.GetMethod(attr.MethodName, paramTypes);
if (pred != null && pred.ReturnType == typeof(bool) &&
(mayDependOnState || IsStateIndependent(pred)))
{
predicates.Add(pred);
}
}
}
