/**
* Returns the best supported encoding for a given client.
*
* @param client The client preferences to use.
* @return The best supported encoding for the given call.
*/
public Encoding getBestEncoding(ClientInfo client) {
Encoding bestEncoding = null;
Encoding currentEncoding = null;
Preference<Encoding> currentPref = null;
float bestScore = 0F;
for (Iterator<Encoding> iter = getSupportedEncodings().iterator(); iter.hasNext(); ) {
currentEncoding = iter.next();
for (Iterator<Preference<Encoding>> iter2 = client.getAcceptedEncodings().iterator();
iter2.hasNext(); ) {
currentPref = iter2.next();
if (currentPref.getMetadata().equals(Encoding.ALL)
|| currentPref.getMetadata().equals(currentEncoding)) {
// A match was found, compute its score
if (currentPref.getQuality() > bestScore) {
bestScore = currentPref.getQuality();
bestEncoding = currentEncoding;
}
}
}
}
return bestEncoding;
}
/**
* Constructor.
*
* @param clientInfo
* @param metadataService
*/
public Conneg(ClientInfo clientInfo, MetadataService metadataService) {
this.clientInfo = clientInfo;
this.metadataService = metadataService;
if (clientInfo != null) {
// Get the enriched user preferences
this.languagePrefs =
getEnrichedPreferences(
clientInfo.getAcceptedLanguages(),
(metadataService == null) ? null : metadataService.getDefaultLanguage(),
Language.ALL);
this.mediaTypePrefs =
getEnrichedPreferences(
clientInfo.getAcceptedMediaTypes(),
(metadataService == null) ? null : metadataService.getDefaultMediaType(),
MediaType.ALL);
this.characterSetPrefs =
getEnrichedPreferences(
clientInfo.getAcceptedCharacterSets(),
(metadataService == null) ? null : metadataService.getDefaultCharacterSet(),
CharacterSet.ALL);
this.encodingPrefs =
getEnrichedPreferences(
clientInfo.getAcceptedEncodings(),
(metadataService == null) ? null : metadataService.getDefaultEncoding(),
Encoding.ALL);
}
}
/**
* Creates a {@link ClientInfo} instance with preferences matching exactly the current variant.
*
* @return The new {@link ClientInfo} instance.
*/
public ClientInfo createClientInfo() {
ClientInfo result = new ClientInfo();
if (getCharacterSet() != null) {
result.getAcceptedCharacterSets().add(new Preference<CharacterSet>(getCharacterSet()));
}
if (getEncodings() != null) {
for (Encoding encoding : getEncodings()) {
result.getAcceptedEncodings().add(new Preference<Encoding>(encoding));
}
}
if (getLanguages() != null) {
for (Language language : getLanguages()) {
result.getAcceptedLanguages().add(new Preference<Language>(language));
}
}
if (getMediaType() != null) {
result.getAcceptedMediaTypes().add(new Preference<MediaType>(getMediaType()));
}
return result;
}
