InternetProtocolFamily Type — netty Architecture

Source Code

transport/src/main/java/io/netty/channel/socket/InternetProtocolFamily.java lines 29–95

@Deprecated
public enum InternetProtocolFamily {
    IPv4(Inet4Address.class, 1),
    IPv6(Inet6Address.class, 2);

    private final Class<? extends InetAddress> addressType;
    private final int addressNumber;

    InternetProtocolFamily(Class<? extends InetAddress> addressType, int addressNumber) {
        this.addressType = addressType;
        this.addressNumber = addressNumber;
    }

    /**
     * Returns the address type of this protocol family.
     */
    public Class<? extends InetAddress> addressType() {
        return addressType;
    }

    /**
     * Returns the
     * <a href="https://www.iana.org/assignments/address-family-numbers/address-family-numbers.xhtml">address number</a>
     * of the family.
     */
    public int addressNumber() {
        return addressNumber;
    }

    /**
     * Returns the {@link InetAddress} that represent the {@code LOCALHOST} for the family.
     */
    public InetAddress localhost() {
        switch (this) {
            case IPv4:
                return NetUtil.LOCALHOST4;
            case IPv6:
                return NetUtil.LOCALHOST6;
            default:
                throw new IllegalStateException("Unsupported family " + this);
        }
    }

    /**
     * Returns the {@link InternetProtocolFamily} for the given {@link InetAddress}.
     */
    public static InternetProtocolFamily of(InetAddress address) {
        if (address instanceof Inet4Address) {
            return IPv4;
        }
        if (address instanceof Inet6Address) {
            return IPv6;
        }
        throw new IllegalArgumentException("address " + address + " not supported");
    }

    public SocketProtocolFamily toSocketProtocolFamily() {
        switch (this) {
            case IPv4:
                return SocketProtocolFamily.INET;
            case IPv6:
                return SocketProtocolFamily.INET6;
            default:
                throw new IllegalStateException();
        }
    }
}