private Set match()

in repository/service/src/main/java/org/apache/karaf/cave/repository/service/bundlerepository/CapabilitySet.java [145:196]
42 lines of code
15 McCabe index (conditional complexity)

    private Set<Capability> match(Set<Capability> caps, SimpleFilter sf) {
        Set<Capability> matches = new HashSet<>();

        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.
            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 (SimpleFilter sf1 : sfs) {
                matches.addAll(match(caps, sf1));
            }
        } 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 (SimpleFilter sf1 : sfs) {
                matches.removeAll(match(caps, sf1));
            }
        } else {
            Map<Object, Set<Capability>> index = indices.get(sf.getName());
            if ((sf.getOperation() == SimpleFilter.EQ) && (index != null)) {
                Set<Capability> existingCaps = index.get(sf.getValue());
                if (existingCaps != null) {
                    matches.addAll(existingCaps);
                    matches.retainAll(caps);
                }
            } else {
                for (Capability cap : caps) {
                    Object lhs = cap.getAttributes().get(sf.getName());
                    if (lhs != null) {
                        if (compare(lhs, sf.getValue(), sf.getOperation())) {
                            matches.add(cap);
                        }
                    }
                }
            }
        }

        return matches;
    }