Class BinaryKey

api/src/main/java/io/grpc/Metadata.java:859–883

  }

  private static class BinaryKey<T> extends Key<T> {
    private final BinaryMarshaller<T> marshaller;

    /** Keys have a name and a binary marshaller used for serialization. */
    private BinaryKey(String name, BinaryMarshaller<T> marshaller) {
      super(name, false /* not pseudo */, marshaller);
      checkArgument(
          name.endsWith(BINARY_HEADER_SUFFIX),
          "Binary header is named %s. It must end with %s",
          name,
          BINARY_HEADER_SUFFIX);
      checkArgument(name.length() > BINARY_HEADER_SUFFIX.length(), "empty key name");
      this.marshaller = checkNotNull(marshaller, "marshaller is null");
    }

    @Override
    byte[] toBytes(T value) {
      return Preconditions.checkNotNull(marshaller.toBytes(value), "null marshaller.toBytes()");
    }

    @Override
    T parseBytes(byte[] serialized) {
      return marshaller.parseBytes(serialized);
    }
  }

  /** A binary key for values which should be serialized lazily to {@link InputStream}s. */
  private static class LazyStreamBinaryKey<T> extends Key<T> {