public BeanEntry remove()

in org.eclipse.sisu.inject/src/org/eclipse/sisu/inject/BeanCache.java [156:197]

36 lines of code
6 McCabe index (conditional complexity)


    public BeanEntry<Q, T> remove( final Binding<T> binding )
    {
        LazyBeanEntry oldBean;

        Object o, n;

        /*
         * Compare-and-swap approach; avoids locking without missing any updates
         */
        do
        {
            o = get();
            if ( null == o )
            {
                return null;
            }
            else if ( o instanceof LazyBeanEntry )
            {
                oldBean = (LazyBeanEntry) o;
                if ( binding != oldBean.binding )
                {
                    return null;
                }
                n = null; // clear single entry
            }
            else
            {
                synchronized ( this )
                {
                    oldBean = ( (Map<?, LazyBeanEntry>) o ).remove( binding );
                    if ( null != oldBean )
                    {
                        mutated = true;
                    }
                    return oldBean;
                }
            }
        }
        while ( !compareAndSet( o, n ) );

        return oldBean;
    }