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8200310: Avoid charset lookup machinery in java.nio.charset.StandardCharsets

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Reviewed-by: sherman, ulfzibis
This commit is contained in:
Martin Buchholz 2018-03-28 21:14:06 -07:00
parent 08adfe31b3
commit 4546512c19
11 changed files with 31 additions and 30 deletions
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15
src/java.base/share/classes/sun/nio/cs/StandardCharsets.java.template
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@ -83,9 +83,12 @@ public class StandardCharsets extends CharsetProvider {
Map<String,Charset> map = cache;
if (map == null) {
map = new Cache();
map.put("utf-8", UTF_8.INSTANCE);
map.put("iso-8859-1", ISO_8859_1.INSTANCE);
map.put("us-ascii", US_ASCII.INSTANCE);
map.put("utf-8", java.nio.charset.StandardCharsets.UTF_8);
map.put("iso-8859-1", java.nio.charset.StandardCharsets.ISO_8859_1);
map.put("us-ascii", java.nio.charset.StandardCharsets.US_ASCII);
map.put("utf-16", java.nio.charset.StandardCharsets.UTF_16);
map.put("utf-16be", java.nio.charset.StandardCharsets.UTF_16BE);
map.put("utf-16le", java.nio.charset.StandardCharsets.UTF_16LE);
cache = map;
}
return map;
@ -123,11 +126,11 @@ public class StandardCharsets extends CharsetProvider {
// Classes eagerly during bootstrap
String csn;
if (charsetName.equals("UTF-8")) {
return UTF_8.INSTANCE;
return java.nio.charset.StandardCharsets.UTF_8;
} else if (charsetName.equals("US-ASCII")) {
return US_ASCII.INSTANCE;
return java.nio.charset.StandardCharsets.US_ASCII;
} else if (charsetName.equals("ISO-8859-1")) {
return ISO_8859_1.INSTANCE;
return java.nio.charset.StandardCharsets.ISO_8859_1;
} else {
csn = canonicalize(toLower(charsetName));
}