private Set match()

in subsystem/subsystem-core/src/main/java/org/apache/aries/subsystem/core/capabilityset/CapabilitySet.java [191:266]
66 lines of code
16 McCabe index (conditional complexity)

    private Set<Capability> match(Set<Capability> caps, final SimpleFilter sf)
    {
        Set<Capability> matches = Collections.newSetFromMap(new ConcurrentHashMap<Capability, Boolean>());

        if (sf.getOperation() == SimpleFilter.MATCH_ALL)
        {
            matches.addAll(caps);
        }
        else if (sf.getOperation() == SimpleFilter.AND)
        {
            // Evaluate each subfilter against the remaining capabilities.
            // For AND we calculate the intersection of each subfilter.
            // We can short-circuit the AND operation if there are no
            // remaining capabilities.
            final List<SimpleFilter> sfs = (List<SimpleFilter>) sf.getValue();
            for (int i = 0; (caps.size() > 0) && (i < sfs.size()); i++)
            {
                matches = match(caps, sfs.get(i));
                caps = matches;
            }
        }
        else if (sf.getOperation() == SimpleFilter.OR)
        {
            // Evaluate each subfilter against the remaining capabilities.
            // For OR we calculate the union of each subfilter.
            List<SimpleFilter> sfs = (List<SimpleFilter>) sf.getValue();
            for (int i = 0; i < sfs.size(); i++)
            {
                matches.addAll(match(caps, sfs.get(i)));
            }
        }
        else if (sf.getOperation() == SimpleFilter.NOT)
        {
            // Evaluate each subfilter against the remaining capabilities.
            // For OR we calculate the union of each subfilter.
            matches.addAll(caps);
            List<SimpleFilter> sfs = (List<SimpleFilter>) sf.getValue();
            for (int i = 0; i < sfs.size(); i++)
            {
                matches.removeAll(match(caps, sfs.get(i)));
            }
        }
        else
        {
            Map<Object, Set<Capability>> index = m_indices.get(sf.getName());
            if ((sf.getOperation() == SimpleFilter.EQ) && (index != null))
            {
                Set<Capability> existingCaps = index.get(sf.getValue());
                if (existingCaps != null)
                {
                    matches.addAll(existingCaps);
                    if (caps != m_capSet)
                    {
                        matches.retainAll(caps);
                    }
                }
            }
            else
            {
                for (Iterator<Capability> it = caps.iterator(); it.hasNext(); )
                {
                    Capability cap = it.next();
                    Object lhs = cap.getAttributes().get(sf.getName());
                    if (lhs != null)
                    {
                        if (compare(lhs, sf.getValue(), sf.getOperation()))
                        {
                            matches.add(cap);
                        }
                    }
                }
            }
        }

        return matches;
    }