HeaderEntry Class — netty Architecture

Source Code

codec-base/src/main/java/io/netty/handler/codec/DefaultHeaders.java lines 1383–1473

    protected static class HeaderEntry<K, V> implements Entry<K, V> {
        protected final int hash;
        protected final K key;
        protected V value;
        /**
         * In bucket linked list
         */
        protected HeaderEntry<K, V> next;
        /**
         * Overall insertion order linked list
         */
        protected HeaderEntry<K, V> before, after;

        protected HeaderEntry(int hash, K key) {
            this.hash = hash;
            this.key = key;
        }

        HeaderEntry(int hash, K key, V value, HeaderEntry<K, V> next, HeaderEntry<K, V> head) {
            this.hash = hash;
            this.key = key;
            this.value = value;
            this.next = next;

            after = head;
            before = head.before;
            pointNeighborsToThis();
        }

        HeaderEntry() {
            hash = -1;
            key = null;
            before = after = this;
        }

        protected final void pointNeighborsToThis() {
            before.after = this;
            after.before = this;
        }

        public final HeaderEntry<K, V> before() {
            return before;
        }

        public final HeaderEntry<K, V> after() {
            return after;
        }

        protected void remove() {
            before.after = after;
            after.before = before;
        }

        @Override
        public final K getKey() {
            return key;
        }

        @Override
        public final V getValue() {
            return value;
        }

        @Override
        public final V setValue(V value) {
            checkNotNull(value, "value");
            V oldValue = this.value;
            this.value = value;
            return oldValue;
        }

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

        @Override
        public boolean equals(Object o) {
            if (!(o instanceof Map.Entry)) {
                return false;
            }