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[core] Correctly handle BCP 42 language tag creation from Locale for xml:lang

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Fixes SMACK-952
This commit is contained in:
Florian Schmaus 2024-09-15 19:09:45 +02:00
parent 94375e3208
commit 49379afd3f
1 changed files with 12 additions and 10 deletions
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22
smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java
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@ -544,19 +544,21 @@ public abstract class ConnectionConfiguration {
* Returns the xml:lang string of the stream language to use when connecting to the server.
*
* <p>If the developer sets the language to null, this will also return null, leading to
* the removal of the xml:lang tag from the stream. If a Locale("") is configured, this will
* return "", which can be used as an override.</p>
* the removal of the xml:lang tag from the stream.</p>
*
* @return the stream language to use when connecting to the server.
* @return the stream language to use when connecting to the server or <code>null</code>.
*/
public String getXmlLang() {
// TODO: Change to Locale.toLanguageTag() once Smack's minimum Android API level is 21 or higher.
// This will need a workaround for new Locale("").getLanguageTag() returning "und". Expected
// behavior of this function:
// - returns null if language is null
// - returns "" if language.getLanguage() returns the empty string
// - returns language.toLanguageTag() otherwise
return language != null ? language.toString().replace("_", "-") : null;
if (language == null) {
return null;
}
String languageTag = language.toLanguageTag();
if (languageTag.equals("und")) {
return null;
}
return languageTag;
}
/**