/// <summary>
/// Gets all static rules defined on the specified types.
/// </summary>
/// <param name="types"></param>
/// <returns></returns>
public static IEnumerable <Rule> GetRules(IEnumerable <Type> types)
{
// Fetch the set of rules declared on the specified types
List <Rule> rules = new List <Rule>();
foreach (Type type in types
.Where(type => type.IsClass)
.SelectMany(type => type.BaseType.IsGenericType ? new Type[] { type, type.BaseType } : new Type[] { type }))
{
rules.AddRange(
type.GetFields(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic)
.Where(field => typeof(IRuleProvider).IsAssignableFrom(field.FieldType))
.SelectMany(field =>
{
IRuleProvider ruleProvider = (IRuleProvider)field.GetValue(null);
if (ruleProvider != null)
{
return(ruleProvider.GetRules(type, field.Name));
}
else
{
StackTrace stackTrace = new StackTrace();
List <MethodBase> callStackMethods = stackTrace.GetFrames()
.Select(f => f.GetMethod())
.ToList();
Type currentType = callStackMethods.First().DeclaringType;
callStackMethods.Reverse();
MethodBase ruleProviderCall = callStackMethods.FirstOrDefault(method => currentType != method.DeclaringType && typeof(IRuleProvider).IsAssignableFrom(method.DeclaringType));
if (ruleProviderCall != null)
{
string errorMessage = string.Format(
"'{0}'.'{1}' is null, declared as a '{2}', and '{3}'.'{4}' is creating/accessing rules. As such, it appears that the '{2}' is still initializing and rules will not register properly. Please see the call stack.",
type.Name, field.Name, typeof(IRuleProvider).Name, ruleProviderCall.DeclaringType.Name, ruleProviderCall.Name
);
throw new ApplicationException(errorMessage);
}
}
return(new Rule[] { });
})
.Where(rule => rule != null)
);
// Ensure the error code has been set on all statically declared condition types
foreach (ConditionType error in
type.GetFields(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic)
.Where(field => typeof(ConditionType).IsAssignableFrom(field.FieldType))
.Select(field =>
{
ConditionType error = (ConditionType)field.GetValue(null);
if (error != null && error.Code == null)
{
error.Code = field.DeclaringType.Name + "." + field.Name;
}
return(error);
}))
{
}
}
return(rules);
}
/// <summary>
/// Creates a new <see cref="Condition"/> based on the specified <see cref="ConditionType"/>
/// and error message.
/// </summary>
/// <param name="error"></param>
public Condition(ConditionType type, string message, object target, params string[] properties)
{
this.Type = type;
this.Message = message;
this.AddTarget(target, properties);
}
internal void ClearCondition(ConditionType error)
{
conditions.Remove(error.Code);
}
/// <summary>
/// Creates a new <see cref="Condition"/> based on the specified <see cref="ConditionType"/>.
/// </summary>
/// <param name="error"></param>
public Condition(ConditionType type, object target, params string[] properties)
: this(type, type.Message, target, properties)
{
}
