All createCompatibleAlternatives()

in src/main/java/org/apache/neethi/util/PolicyIntersector.java [119:162]
42 lines of code
18 McCabe index (conditional complexity)

    All createCompatibleAlternatives(Collection<? extends PolicyComponent> alt1, 
                                     Collection<? extends PolicyComponent> alt2,
                                     boolean remove) {
        All all = new All();
        if (alt1.isEmpty() && alt2.isEmpty()) {
            return all;
        }
        
        alt1 = new ArrayList<PolicyComponent>(alt1);
        alt2 = new ArrayList<PolicyComponent>(alt2);
        
        Iterator<? extends PolicyComponent> iterator = alt1.iterator();
        while (iterator.hasNext()) {
            PolicyComponent a1 = iterator.next();
            if (a1 instanceof Assertion) {
                Assertion assertion = findCompatibleAssertion((Assertion)a1, alt2, remove);
                if (assertion != null) {
                    if (remove) {
                        iterator.remove();
                    }
                    all.addPolicyComponent(assertion);
                } else if (!strict && ((Assertion)a1).isIgnorable()) {
                    all.addPolicyComponent(a1);
                } else if (strict || !((Assertion)a1).isIgnorable()) {
                    return null;
                }
            }
        }
        iterator = alt2.iterator();
        while (iterator.hasNext()) {
            PolicyComponent a2 = iterator.next();
            if (a2 instanceof Assertion) {
                Assertion assertion = findCompatibleAssertion((Assertion)a2, alt1, remove);
                if (assertion != null) { 
                    all.addPolicyComponent(assertion);
                } else if (!strict && ((Assertion)a2).isIgnorable()) {
                    all.addPolicyComponent(a2);
                } else if (strict || !((Assertion)a2).isIgnorable()) {
                    return null;
                }
            }
        }
        return all;
    }