Method charset

output/java_guava/1.4.18/MediaType.java:715–725

Returns an optional charset for the value of the charset parameter if it is specified. @throws IllegalStateException if multiple charset values have been set for this media type @throws IllegalCharsetNameException if a charset value is present, but illegal @throws UnsupportedCharsetException if a c

()

  public Optional<Charset> charset() {
    ImmutableSet<String> charsetValues = ImmutableSet.copyOf(parameters.get(CHARSET_ATTRIBUTE));
    switch (charsetValues.size()) {
      case 0:
        return Optional.absent();
      case 1:
        return Optional.of(Charset.forName(Iterables.getOnlyElement(charsetValues)));
      default:
        throw new IllegalStateException("Multiple charset values defined: " + charsetValues);
    }
  }

  /**
   * Returns a new instance with the same type and subtype as this instance, but without any