import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * An {@link InputStream} that maintains a hash of the data read from it.
 *
 * @author Qian Huang
 * @since 16.0
 */
@Beta
@ElementTypesAreNonnullByDefault
public final class HashingInputStream extends FilterInputStream {
  private final Hasher hasher;

  /**