ReadOnlyValueIterator Class — netty Architecture

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/ReadOnlyHttpHeaders.java lines 418–458

    private final class ReadOnlyValueIterator implements Iterator<CharSequence> {
        private final CharSequence name;
        private final int nameHash;
        private int nextNameIndex;

        ReadOnlyValueIterator(CharSequence name) {
            this.name = name;
            nameHash = AsciiString.hashCode(name);
            nextNameIndex = findNextValue();
        }

        @Override
        public boolean hasNext() {
            return nextNameIndex != -1;
        }

        @Override
        public CharSequence next() {
            if (!hasNext()) {
                throw new NoSuchElementException();
            }
            CharSequence value = nameValuePairs[nextNameIndex + 1];
            nextNameIndex = findNextValue();
            return value;
        }

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

        private int findNextValue() {
            for (int i = nextNameIndex; i < nameValuePairs.length; i += 2) {
                final CharSequence roName = nameValuePairs[i];
                if (nameHash == AsciiString.hashCode(roName) && contentEqualsIgnoreCase(name, roName)) {
                    return i;
                }
            }
            return -1;
        }
    }