public boolean replace()

in commons-jcs3-jcache/src/main/java/org/apache/commons/jcs3/jcache/JCSCache.java [573:618]

• 46 lines of code
• 14 McCabe index (conditional complexity)

    public boolean replace(final K key, final V oldValue, final V newValue)
    {
        assertNotClosed();
        assertNotNull(key, "key");
        assertNotNull(oldValue, "oldValue");
        assertNotNull(newValue, "newValue");
        final boolean statisticsEnabled = config.isStatisticsEnabled();
        final ICacheElement<K, V> elt = delegate.get(key);
        if (elt != null)
        {
            V value = elt.getVal();
            if (value != null && statisticsEnabled)
            {
                statistics.increaseHits(1);
            }
            if (value == null && config.isReadThrough())
            {
                value = doLoad(key, false, Times.now(false), false);
            }
            if (value != null && value.equals(oldValue))
            {
                put(key, newValue);
                return true;
            }
            if (value != null)
            {
                final Duration expiryForAccess = expiryPolicy.getExpiryForAccess();
                if (expiryForAccess != null && (!elt.getElementAttributes().getIsEternal() || !expiryForAccess.isEternal()))
                {
                    try
                    {
                        delegate.update(updateElement(key, elt.getVal(), expiryForAccess, elt.getElementAttributes()));
                    }
                    catch (final IOException e)
                    {
                        throw new CacheException(e);
                    }
                }
            }
        }
        else if (statisticsEnabled)
        {
            statistics.increaseMisses(1);
        }
        return false;
    }