private static void copyIfNotPresent ( Configuration config , String deprecatedKey , String newKey ) { String deprecatedValue = config . get ( deprecatedKey ) ; if ( config . get ( newKey ) == null && deprecatedValue != null ) { logger . atWarning ( ) . log ( "Key %s is deprecated. Copying the value of key %s to new key %s" , deprecatedKey , deprecatedKey , newKey ) ; config . set ( newKey , deprecatedValue ) ; } }
Copy the value of the deprecated key to the new key if a value is present for the deprecated key but not the new key .