ReadOnlyIterator Class — netty Architecture

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/ReadOnlyHttpHeaders.java lines 280–326

    private final class ReadOnlyIterator implements Map.Entry<CharSequence, CharSequence>,
            Iterator<Map.Entry<CharSequence, CharSequence>> {
        private CharSequence key;
        private CharSequence value;
        private int nextNameIndex;

        @Override
        public boolean hasNext() {
            return nextNameIndex != nameValuePairs.length;
        }

        @Override
        public Map.Entry<CharSequence, CharSequence> next() {
            if (!hasNext()) {
                throw new NoSuchElementException();
            }
            key = nameValuePairs[nextNameIndex];
            value = nameValuePairs[nextNameIndex + 1];
            nextNameIndex += 2;
            return this;
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException("read only");
        }

        @Override
        public CharSequence getKey() {
            return key;
        }

        @Override
        public CharSequence getValue() {
            return value;
        }

        @Override
        public CharSequence setValue(CharSequence value) {
            throw new UnsupportedOperationException("read only");
        }

        @Override
        public String toString() {
            return key.toString() + '=' + value.toString();
        }
    }