echonesis commented on code in PR #9564:
URL: https://github.com/apache/ozone/pull/9564#discussion_r2652686826


##########
hadoop-ozone/cli-shell/src/main/java/org/apache/hadoop/ozone/shell/acl/GetAclHandler.java:
##########
@@ -19,19 +19,61 @@
 
 import java.io.IOException;
 import java.util.List;
+import java.util.stream.Collectors;
 import org.apache.hadoop.ozone.OzoneAcl;
 import org.apache.hadoop.ozone.client.OzoneClient;
 import org.apache.hadoop.ozone.security.acl.OzoneObj;
+import picocli.CommandLine.Option;
 
 /**
  * Get ACLs.
  */
 public abstract class GetAclHandler extends AclHandler {
 
+  @Option(names = {"--string", "-o"},

Review Comment:
   I've updated the Option settings, and it works for backward compatibility.
   - default: JSON
   - with `--json`: JSON
   - with `--json=false`: String
   
   We could use the syntax:
   ```
   @Option(names = {"--json"},
       description = "Format output as JSON",
       defaultValue = "true",
       fallbackValue = "true")
   private boolean json;
   ```



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