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8268056: Update java.net and java.nio to use switch expressions

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Reviewed-by: dfuchs, michaelm, chegar, iris, alanb
This commit is contained in:
Patrick Concannon 2021-06-09 10:13:25 +00:00
parent 9cfd560bb1
commit 438895903b
2 changed files with 30 additions and 41 deletions
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41
src/java.base/share/classes/java/nio/file/Files.java
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@ -2803,40 +2803,37 @@ public final class Files {
try (FileTreeWalker walker = new FileTreeWalker(options, maxDepth)) {
FileTreeWalker.Event ev = walker.walk(start);
do {
FileVisitResult result;
switch (ev.type()) {
case ENTRY :
FileVisitResult result = switch (ev.type()) {
case ENTRY -> {
IOException ioe = ev.ioeException();
if (ioe == null) {
assert ev.attributes() != null;
result = visitor.visitFile(ev.file(), ev.attributes());
yield visitor.visitFile(ev.file(), ev.attributes());
} else {
result = visitor.visitFileFailed(ev.file(), ioe);
yield visitor.visitFileFailed(ev.file(), ioe);
}
break;
case START_DIRECTORY :
result = visitor.preVisitDirectory(ev.file(), ev.attributes());
}
case START_DIRECTORY -> {
var res = visitor.preVisitDirectory(ev.file(), ev.attributes());
// if SKIP_SIBLINGS and SKIP_SUBTREE is returned then
// there shouldn't be any more events for the current
// directory.
if (result == FileVisitResult.SKIP_SUBTREE ||
result == FileVisitResult.SKIP_SIBLINGS)
if (res == FileVisitResult.SKIP_SUBTREE ||
res == FileVisitResult.SKIP_SIBLINGS)
walker.pop();
break;
case END_DIRECTORY :
result = visitor.postVisitDirectory(ev.file(), ev.ioeException());
yield res;
}
case END_DIRECTORY -> {
var res = visitor.postVisitDirectory(ev.file(), ev.ioeException());
// SKIP_SIBLINGS is a no-op for postVisitDirectory
if (result == FileVisitResult.SKIP_SIBLINGS)
result = FileVisitResult.CONTINUE;
break;
default :
throw new AssertionError("Should not get here");
}
if (res == FileVisitResult.SKIP_SIBLINGS)
res = FileVisitResult.CONTINUE;
yield res;
}
default -> throw new AssertionError("Should not get here");
};
if (Objects.requireNonNull(result) != FileVisitResult.CONTINUE) {
if (result == FileVisitResult.TERMINATE) {