Missing whitespace on case in `zuul-core/.../Http2MetricsChannelHandlers.java` with `If-else-if-else to switch`

[timtebeek]

Problem

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Expected behavior

Describe what you expected to see.

Example diff

From: zuul-core/src/main/java/com/netflix/netty/common/metrics/Http2MetricsChannelHandlers.java

protected void incrementCounter(Registry registry, String counterName, String metricId, Http2Frame frame) {
long errorCode;
-        if (frame instanceof Http2ResetFrame resetFrame) {
-            errorCode = resetFrame.errorCode();
-        } else if (frame instanceof Http2GoAwayFrame goAwayFrame) {
-            errorCode = goAwayFrame.errorCode();
-        } else {
-            errorCode = -1;
+        switch (frame) {
+            caseHttp2ResetFrame resetFrame -> errorCode = resetFrame.errorCode();
+            caseHttp2GoAwayFrame goAwayFrame -> errorCode = goAwayFrame.errorCode();
+            case null -> errorCode = -1;
}

registry.counter(counterName, "id", metricId, "frame", frame.name(), "error_code", Long.toString(errorCode))

Recipes in example diff:

• org.openrewrite.java.migrate.lang.IfElseIfConstructToSwitch
• org.openrewrite.java.migrate.UpgradeJavaVersion

References:

• View original result
• Recipe ID: org.openrewrite.java.migrate.lang.IfElseIfConstructToSwitch
• Recipe Name: If-else-if-else to switch
• Repository: Netflix/zuul/master
• Created at Wed Apr 22 2026 22:15:03 GMT+0200 (Central European Summer Time)