/**
* Sets the default language for any ID3v2 tag frames which require it. While the value will
* already exist when reading from a file, this value will be used when a new ID3v2 Frame is
* created from scratch.
*
* @param lang language ID, [ISO-639-2] ISO/FDIS 639-2 definition
*/
public void setLanguage(String lang) {
if (Languages.getInstanceOf().getIdToValueMap().containsKey(lang)) {
language = lang;
}
}
/** @return true if text value is valid language code */
public boolean isValid() {
return Languages.getInstanceOf().getValueForId(getFirstTextValue()) != null;
}