public boolean retainAll()

in tiles-request-api/src/main/java/org/apache/tiles/request/collection/ScopeMap.java [159:176]

• 18 lines of code
• 4 McCabe index (conditional complexity)

        public boolean retainAll(Collection<?> c) {
            Collection<Map.Entry<String, Object>> realCollection = (Collection<java.util.Map.Entry<String, Object>>) c;
            boolean retValue = false;
            Set<String> keysToRemove = new LinkedHashSet<String>();
            for (Enumeration<String> keys = context.getKeys(); keys.hasMoreElements();) {
                String key = keys.nextElement();
                Object value = context.getValue(key);
                Map.Entry<String, Object> entry = new MapEntry<String, Object>(key, value, false);
                if (!realCollection.contains(entry)) {
                    retValue = true;
                    keysToRemove.add(key);
                }
            }
            for (String key : keysToRemove) {
                context.removeValue(key);
            }
            return retValue;
        }