public bool IsTypeValid(String className, Type type)
{
ObjectSubclassInfo subclassInfo = null;
mutex.EnterReadLock();
registeredSubclasses.TryGetValue(className, out subclassInfo);
mutex.ExitReadLock();
return(subclassInfo == null
? type == typeof(AVObject)
: subclassInfo.TypeInfo == type.GetTypeInfo());
}
public Type GetType(String className)
{
ObjectSubclassInfo info = null;
mutex.EnterReadLock();
registeredSubclasses.TryGetValue(className, out info);
mutex.ExitReadLock();
return(info != null
? info.TypeInfo.AsType()
: null);
}
public AVObject Instantiate(String className)
{
ObjectSubclassInfo info = null;
mutex.EnterReadLock();
registeredSubclasses.TryGetValue(className, out info);
mutex.ExitReadLock();
return(info != null
? info.Instantiate()
: new AVObject(className));
}
public IDictionary <String, String> GetPropertyMappings(String className)
{
ObjectSubclassInfo info = null;
mutex.EnterReadLock();
registeredSubclasses.TryGetValue(className, out info);
if (info == null)
{
registeredSubclasses.TryGetValue(parseObjectClassName, out info);
}
mutex.ExitReadLock();
return(info.PropertyMappings);
}
public void RegisterSubclass(Type type)
{
TypeInfo typeInfo = type.GetTypeInfo();
if (!typeof(AVObject).GetTypeInfo().IsAssignableFrom(typeInfo))
{
throw new ArgumentException("Cannot register a type that is not a subclass of AVObject");
}
String className = GetClassName(type);
try {
// Perform this as a single independent transaction, so we can never get into an
// intermediate state where we *theoretically* register the wrong class due to a
// TOCTTOU bug.
mutex.EnterWriteLock();
ObjectSubclassInfo previousInfo = null;
if (registeredSubclasses.TryGetValue(className, out previousInfo))
{
if (typeInfo.IsAssignableFrom(previousInfo.TypeInfo))
{
// Previous subclass is more specific or equal to the current type, do nothing.
return;
}
else if (previousInfo.TypeInfo.IsAssignableFrom(typeInfo))
{
// Previous subclass is parent of new child, fallthrough and actually register
// this class.
/* Do nothing */
}
else
{
throw new ArgumentException(
"Tried to register both " + previousInfo.TypeInfo.FullName + " and " + typeInfo.FullName +
" as the AVObject subclass of " + className + ". Cannot determine the right class " +
"to use because neither inherits from the other."
);
}
}
ConstructorInfo constructor = type.FindConstructor();
if (constructor == null)
{
throw new ArgumentException("Cannot register a type that does not implement the default constructor!");
}
registeredSubclasses[className] = new ObjectSubclassInfo(type, constructor);
} finally {
mutex.ExitWriteLock();
}
Action toPerform;
mutex.EnterReadLock();
registerActions.TryGetValue(className, out toPerform);
mutex.ExitReadLock();
if (toPerform != null)
{
toPerform();
}
}
public String GetClassName(Type type)
{
return(type == typeof(AVObject)
? parseObjectClassName
: ObjectSubclassInfo.GetClassName(type.GetTypeInfo()));
}
public void RegisterSubclass(Type type)
{
TypeInfo typeInfo = type.GetTypeInfo();
if (!typeof(AVObject).GetTypeInfo().IsAssignableFrom(typeInfo)) {
throw new ArgumentException("Cannot register a type that is not a subclass of AVObject");
}
String className = GetClassName(type);
try {
// Perform this as a single independent transaction, so we can never get into an
// intermediate state where we *theoretically* register the wrong class due to a
// TOCTTOU bug.
mutex.EnterWriteLock();
ObjectSubclassInfo previousInfo = null;
if (registeredSubclasses.TryGetValue(className, out previousInfo)) {
if (typeInfo.IsAssignableFrom(previousInfo.TypeInfo)) {
// Previous subclass is more specific or equal to the current type, do nothing.
return;
} else if (previousInfo.TypeInfo.IsAssignableFrom(typeInfo)) {
// Previous subclass is parent of new child, fallthrough and actually register
// this class.
/* Do nothing */
} else {
throw new ArgumentException(
"Tried to register both " + previousInfo.TypeInfo.FullName + " and " + typeInfo.FullName +
" as the AVObject subclass of " + className + ". Cannot determine the right class " +
"to use because neither inherits from the other."
);
}
}
ConstructorInfo constructor = type.FindConstructor();
if (constructor == null) {
throw new ArgumentException("Cannot register a type that does not implement the default constructor!");
}
registeredSubclasses[className] = new ObjectSubclassInfo(type, constructor);
} finally {
mutex.ExitWriteLock();
}
Action toPerform;
mutex.EnterReadLock();
registerActions.TryGetValue(className, out toPerform);
mutex.ExitReadLock();
if (toPerform != null) {
toPerform();
}
}
