private static Constructor getConstructorOfInetAddress$CacheEntry()

in library/src/main/java/com/alibaba/dcm/internal/InetAddressCacheUtilForOld.java [72:98]

12 lines of code
3 McCabe index (conditional complexity)


    private static Constructor<?> getConstructorOfInetAddress$CacheEntry() throws ClassNotFoundException {
        if (constructorOfInetAddress$CacheEntry != null) return constructorOfInetAddress$CacheEntry;

        synchronized (InetAddressCacheUtilCommons.class) {
            // double check
            if (constructorOfInetAddress$CacheEntry != null) return constructorOfInetAddress$CacheEntry;

            final String className = "java.net.InetAddress$CacheEntry";
            final Class<?> clazz = Class.forName(className);

            // InetAddress.CacheEntry has only one constructor:
            // - for jdk 6, constructor signature is CacheEntry(Object address, long expiration)
            // - for jdk 7/8+, constructor signature is CacheEntry(InetAddress[] addresses, long expiration)
            //
            // code in jdk 6:
            //   https://hg.openjdk.java.net/jdk6/jdk6/jdk/file/8deef18bb749/src/share/classes/java/net/InetAddress.java#l739
            // code in jdk 7:
            //   https://hg.openjdk.java.net/jdk7u/jdk7u/jdk/file/4dd5e486620d/src/share/classes/java/net/InetAddress.java#l742
            // code in jdk 8:
            //   https://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/45e4e636b757/src/share/classes/java/net/InetAddress.java#l748
            final Constructor<?> constructor = clazz.getDeclaredConstructors()[0];
            constructor.setAccessible(true);

            constructorOfInetAddress$CacheEntry = constructor;
            return constructor;
        }
    }