龙目岛懒惰的可变集合的吸气剂

Question

I have a class which has a collection:

public class Foo
{
    @Inject
    private BarManager barManager;
    @Getter(lazy = true)
    private final List<Bar> bars = barManager.getAll();

    public void addBar(Bar bar)
    {
        bars.add(bar);
    }
}

However I cannot add/remove elements to/from the List . The cause is that the attribute is an AtomicReference . The warning/error is:

The method add(Employee) is undefined for the type  AtomicReference<AtomicReference<List<Employee>>>

How can perform add/remove operations on the collection?

Answer 1

Your solution is weird indeed and depends on some implementation details. Moreover it break with NPE if the field hasn't been initialized yet. The proper solution works always:

getBars().add(bar);

Answer 2

Disclaimer: This answer and especially the comments are here for informational purposes. Please use the accepted answer above instead of this.

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Wouldn't have thought to solve it so quickly by myself. The solution is rather weird:

public class Foo
{
    @Inject
    private BarManager barManager;
    @Getter(lazy = true)
    private final List<Bar> bars = barManager.getAll();

    public void addBar(Bar bar)
    {
        bars.get().get().add(bar);
    }
}

The get() returns the reference, however for some reason I have to call get() twice.