/**
* Casts this {@code ModelType} object to represent a subclass of the class represented by the
* specified class object. Checks that the cast is valid, and throws a {@code ClassCastException}
* if it is not. If this method succeeds, it always returns a reference to this {@code ModelType}
* object.
*
* @throws ClassCastException if this cannot be cast as the subtype of the given type.
* @throws IllegalStateException if this is a wildcard.
* @throws IllegalArgumentException if the given type is a wildcard.
*/
public <U> ModelType<? extends U> asSubtype(ModelType<U> modelType) {
if (isWildcard()) {
throw new IllegalStateException(this + " is a wildcard type");
}
if (modelType.isWildcard()) {
throw new IllegalArgumentException(modelType + " is a wildcard type");
}
if (modelType.getRawClass().isAssignableFrom(getRawClass())) {
return Cast.uncheckedCast(this);
} else {
throw new ClassCastException(
String.format("'%s' cannot be cast as a subtype of '%s'", this, modelType));
}
}
