valueFor<A> method

A valueFor<A>(InheritableAspect<T> aspect, [ A transform(T)? ])

Get the value for given aspect. This checks for any overrides, and provides the overridden value if there is one, or _value by transform

Optionally provide transform. By default _value is simply casted

Implementation

A valueFor<A>(InheritableAspect<T> aspect, [A Function(T)? transform]) {
  assert(isSupportedAspect(aspect));
  final maybeOverride = _overrides.lookup(aspect);

  if (maybeOverride is AspectOverride) {
    if (maybeOverride.override is A || maybeOverride.override == null)
      return maybeOverride.override as A;
    else
      throw StateError(
        'Invalid override provided for $aspect of $this, '
        'expected value of type $A but got ${maybeOverride.override.runtimeType}',
      );
  }

  if (aspect is TransformingAspect<A, T>) {
    transform ??= aspect.transform;
  }

  return (transform ?? _defaultTransform)(_value);
}