Class AsciiKey

api/src/main/java/io/grpc/Metadata.java:966–991

  }

  private static class AsciiKey<T> extends Key<T> {
    private final AsciiMarshaller<T> marshaller;

    /** Keys have a name and an ASCII marshaller used for serialization. */
    private AsciiKey(String name, boolean pseudo, AsciiMarshaller<T> marshaller) {
      super(name, pseudo, marshaller);
      Preconditions.checkArgument(
          !name.endsWith(BINARY_HEADER_SUFFIX),
          "ASCII header is named %s.  Only binary headers may end with %s",
          name,
          BINARY_HEADER_SUFFIX);
      this.marshaller = Preconditions.checkNotNull(marshaller, "marshaller");
    }

    @Override
    byte[] toBytes(T value) {
      String encoded = Preconditions.checkNotNull(
          marshaller.toAsciiString(value), "null marshaller.toAsciiString()");
      return encoded.getBytes(US_ASCII);
    }

    @Override
    T parseBytes(byte[] serialized) {
      return marshaller.parseAsciiString(new String(serialized, US_ASCII));
    }
  }

  private static final class TrustedAsciiKey<T> extends Key<T> {
    private final TrustedAsciiMarshaller<T> marshaller;