Class UnmodifiableMap

core/src/main/jdk1.1/java/util/Collections.java:301–385

    }

    static class UnmodifiableMap
        implements Map
    {
        private Map c;

        UnmodifiableMap(Map map)
        {
            this.c = map;
        }

        public int size()
        {
            return c.size();
        }

        public boolean isEmpty()
        {
            return c.isEmpty();
        }

        public boolean containsKey(Object o)
        {
            return c.containsKey(o);
        }

        public boolean containsValue(Object o)
        {
            return c.containsValue(o);
        }

        public Object get(Object o)
        {
            return c.get(o);
        }

        public Object put(Object o, Object o2)
        {
            throw new UnsupportedOperationException();
        }

        public Object remove(Object o)
        {
            throw new UnsupportedOperationException();
        }

        public void putAll(Map map)
        {
            throw new UnsupportedOperationException();
        }

        public void clear()
        {
            throw new UnsupportedOperationException();
        }

        public Set keySet()
        {
            return Collections.unmodifiableSet(c.keySet());