[GitHub] [hadoop-ozone] xiaoyuyao commented on a change in pull request #293: HDDS-2530. Sonar : refactor verifyResourceName in HddsClientUtils to fix Sonar errors

[GitBox <gi...@apache.org>]

xiaoyuyao commented on a change in pull request #293: HDDS-2530. Sonar : refactor verifyResourceName in HddsClientUtils to fix Sonar errors
URL: https://github.com/apache/hadoop-ozone/pull/293#discussion_r353959404
 
 

 ##########
 File path: hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/client/HddsClientUtils.java
 ##########
 @@ -150,6 +142,49 @@ public static void verifyResourceName(String resName)
       throw new IllegalArgumentException("Bucket or Volume name "
           + "cannot end with a period or dash");
     }
+  }
+
+  private static boolean isLowercaseAlphanumeric(char c) {
+    return (Character.toString(c).matches("[a-z0-9]"));
 
 Review comment:
   We can avoid the string conversion and pattern match with the following:
   return Character.isLowerCase(c) || Character.isDigit(c)

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