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8270490: Charset.forName() taking fallback default value

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Reviewed-by: joehw, rriggs, serb, dfuchs
This commit is contained in:
Naoto Sato 2021-10-27 12:39:46 +00:00
parent a29273336b
commit 168081efc8
3 changed files with 109 additions and 8 deletions
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33
src/java.base/share/classes/java/nio/charset/Charset.java
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@ -527,6 +527,39 @@ public abstract class Charset
throw new UnsupportedCharsetException(charsetName);
}
/**
* Returns a charset object for the named charset. If the charset object
* for the named charset is not available or {@code charsetName} is not a
* legal charset name, then {@code fallback} is returned.
*
* @param charsetName
* The name of the requested charset; may be either
* a canonical name or an alias
*
* @param fallback
* fallback charset in case the charset object for the named
* charset is not available or {@code charsetName} is not a legal
* charset name. May be {@code null}
*
* @return A charset object for the named charset, or {@code fallback}
* in case the charset object for the named charset is not
* available or {@code charsetName} is not a legal charset name
*
* @throws IllegalArgumentException
* If the given {@code charsetName} is {@code null}
*
* @since 18
*/
public static Charset forName(String charsetName,
Charset fallback) {
try {
Charset cs = lookup(charsetName);
return cs != null ? cs : fallback;
} catch (IllegalCharsetNameException icne) {
return fallback;
}
}
// Fold charsets from the given iterator into the given map, ignoring
// charsets whose names already have entries in the map.
//