*/
@Beta
@ElementTypesAreNonnullByDefault
public interface Hasher extends PrimitiveSink {
  @CanIgnoreReturnValue
  @Override
  Hasher putByte(byte b);

  @CanIgnoreReturnValue
  @Override
  Hasher putBytes(byte[] bytes);

  @CanIgnoreReturnValue
  @Override
  Hasher putBytes(byte[] bytes, int off, int len);

  @CanIgnoreReturnValue
  @Override
  Hasher putBytes(ByteBuffer bytes);

  @CanIgnoreReturnValue

 */
@Beta
@ElementTypesAreNonnullByDefault
public interface Hasher extends PrimitiveSink {
  @CanIgnoreReturnValue
  @Override
  Hasher putByte(byte b);

  @CanIgnoreReturnValue
  @Override
  Hasher putBytes(byte[] bytes);

  @CanIgnoreReturnValue
  @Override
  Hasher putBytes(byte[] bytes, int off, int len);

  @CanIgnoreReturnValue
  @Override
  Hasher putBytes(ByteBuffer bytes);

  @CanIgnoreReturnValue

     */
    void putDouble(double value);

    /**
     * Feed a boolean value into the hasher.
     */
    void putBoolean(boolean value);

    /**
     * Feed a string into the hasher.
     */
    void putString(CharSequence value);

    /**
     * Feed a hash code into the hasher.
     */
    void putHash(HashCode hashCode);

    /**
     * Puts a hashable value into the hasher.
     */

    def runtimeLoader = getClass().getClassLoader()
    def hasher = hasher((runtimeLoader): "system")

    def "hashes known classloader"() {
        expect:
        hasher.getClassLoaderHash(runtimeLoader) == hashFor("system")
    }

    def "hashes unknown classloader"() {
        def unknownLoader = Mock(ClassLoader)
        expect:
        hasher.getClassLoaderHash(unknownLoader) == null
    }

        this.classLoaderFactory = classLoaderFactory;
        Map<ClassLoader, byte[]> hashes = new WeakHashMap<ClassLoader, byte[]>();
        for (Map.Entry<ClassLoader, String> entry : knownClassLoaders.entrySet()) {
            hashes.put(entry.getKey(), entry.getValue().getBytes(Charsets.UTF_8));
        }
        this.knownClassLoaders = hashes;
    }

    @Nullable
    @Override

        def hasher = Hashing.newHasher()
        strings.each { hasher.putString(it) }
        hasher.hash()
    }

    def hashKey(List<List<Integer>> bytes) {
        def hasher = Hashing.newHasher()
        bytes.each {
            if (it.size() == 1) {
                hasher.putByte(it[0] as byte)
            } else {
                hasher.putBytes(it as byte[])
            }

    CachingFileHasher hasher

    def setup() {
        file.write("some-content")
        1 * cacheAccess.createIndexedCache({ it.cacheName == "fileHashes"  }, _, _) >> cache
        hasher = new CachingFileHasher(target, cacheAccess, new StringInterner(), timeStampInspector, "fileHashes", fileSystem, 1000, statisticsCollector)
    }

    def "hashes file when hash not cached"() {

 *       cryptographic hashes.)
 *   <li><b>fast:</b> perhaps self-explanatory, but often the most important consideration.
 * </ul>
 *
 * <h3>Providing input to a hash function</h3>
 *
 * <p>The primary way to provide the data that your hash function should act on is via a {@link
 * Hasher}. Obtain a new hasher from the hash function using {@link #newHasher}, "push" the relevant

 *       cryptographic hashes.)
 *   <li><b>fast:</b> perhaps self-explanatory, but often the most important consideration.
 * </ul>
 *
 * <h3>Providing input to a hash function</h3>
 *
 * <p>The primary way to provide the data that your hash function should act on is via a {@link
 * Hasher}. Obtain a new hasher from the hash function using {@link #newHasher}, "push" the relevant

    public static void putLongs(Hasher hasher, long[] array) {
        hasher.putInt(array.length);
        for (long l : array) {
            hasher.putLong(l);
        }
    }

    public static void putInts(Hasher hasher, int[] array) {
        hasher.putInt(array.length);
        for (int i : array) {
            hasher.putInt(i);
        }
    }

    public static void putShorts(Hasher hasher, short[] array) {