Transform.java

public class B
{
	public static List<B> transform(List<A> as)
	{
		try
		{
			return as.stream()
				.map(a ->
				{
					if (a.nope()) throw new Exception();
					return new B(a.getName());
				}
				.collect(Collections.toList());
		}
		catch (Exception e) { return null; }
	}
}