Class MediaType

output/java_guava/1.4.17/MediaType.java:77–1084

Represents an Internet Media Type (also known as a MIME Type or Content Type). This class also supports the concept of media ranges defined by HTTP/1.1 . As such

@Beta
@GwtCompatible
@Immutable
public final class MediaType {
  private static final String CHARSET_ATTRIBUTE = "charset";
  private static final ImmutableListMultimap<String, String> UTF_8_CONSTANT_PARAMETERS = ImmutableListMultimap.of(CHARSET_ATTRIBUTE, Ascii.toLowerCase(UTF_8.name()));

  /** Matcher for type, subtype and attributes. */
  private static final CharMatcher TOKEN_MATCHER = ascii().and(javaIsoControl().negate()).and(CharMatcher.isNot(' ')).and(CharMatcher.noneOf("()<>@,;:\\\"/[]?="));
  private static final CharMatcher QUOTED_TEXT_MATCHER = ascii().and(CharMatcher.noneOf("\"\\\r"));
  /*
   * This matches the same characters as linear-white-space from RFC 822, but we make no effort to
   * enforce any particular rules with regards to line folding as stated in the class docs.
   */
  private static final CharMatcher LINEAR_WHITE_SPACE = CharMatcher.anyOf(" \t\r\n");

  // TODO(gak): make these public?
  private static final String APPLICATION_TYPE = "application";
  private static final String AUDIO_TYPE = "audio";
  private static final String IMAGE_TYPE = "image";
  private static final String TEXT_TYPE = "text";
  private static final String VIDEO_TYPE = "video";
  private static final String WILDCARD = "*";
  private static final Map<MediaType, MediaType> KNOWN_TYPES = Maps.newHashMap();
  private static MediaType createConstant(String type, String subtype) {
    return addKnownType(new MediaType(type, subtype, ImmutableListMultimap.<String, String>of()));
  }

  private static MediaType createConstantUtf8(String type, String subtype) {
    return addKnownType(new MediaType(type, subtype, UTF_8_CONSTANT_PARAMETERS));
  }

  private static MediaType addKnownType(MediaType mediaType) {
    KNOWN_TYPES.put(mediaType, mediaType);
    return mediaType;
  }

  /*
   * The following constants are grouped by their type and ordered alphabetically by the constant
   * name within that type. The constant name should be a sensible identifier that is closest to the
   * "common name" of the media. This is often, but not necessarily the same as the subtype.
   *
   * Be sure to declare all constants with the type and subtype in all lowercase. For types that
   * take a charset (e.g. all text/* types), default to UTF-8 and suffix the constant name with
   * "_UTF_8".
   */


  public static final MediaType ANY_TYPE = createConstant(WILDCARD, WILDCARD);


  public static final MediaType ANY_TEXT_TYPE = createConstant(TEXT_TYPE, WILDCARD);


  public static final MediaType ANY_IMAGE_TYPE = createConstant(IMAGE_TYPE, WILDCARD);


  public static final MediaType ANY_AUDIO_TYPE = createConstant(AUDIO_TYPE, WILDCARD);