Handling deletions from vo via service method - how?

Question

If you create a hyperlink to delete a row (from a grid), i.e.
    <a href="MyPage.do?event=RemoveNew&Arg0=<c:out value='${Row.rowKeyStr}' />">Remove</a>
What do you do with this Row Key String? I'm reluctant to use a value (such as a PK ID#) as I like the transparency of the key string, and wouldn't really want the user issuing a URL and just changing the pk value and removing something else.
So, do I:
a) pass this rowKeyString to the service method, which I can't see how I can even look up anything in an appmodule based on a rowkeystring, I really need a oracle.jbo.Key, but creating a Key from a string is deprecated
public void onRemoveNew( DataActionContext ctx )
       log.info(userName(ctx) + "onRemoveNew **** - START");
       try
          // grab rowKeyStr from from end hyperlink (Arg0)       
          String strRowKey = ctx.getHttpServletRequest().getParameter("Arg0");      
          AppModule am = getAppModule(ctx);
          am.removeRowbyRowKeyStr( strRowKey );
       catch ( JboException jex )
         au.logException( jex, log );
         throw jex;
       log.info(userName(ctx) + "onRemoveNew **** - END");
    } // onRemoveNewthe backend service method "stub" for now:
public void removeRowbyRowKeyStr( String rowKeyStr )
    log.info(userName(ctx) + "removeRowbyRowKeyStr**** - START");
    // Since no navigation took place on front end, first let's find this row
    // what do I do with this rowKeyString
    // deprecated:    Key k = new Key( rowKeyStr );
    ViewObject vo = findMyViewObject();
    try
         Key k = new Key ( rowKeyStr, vo.getKeyAttributeDefs() );
         // proceed from here...
    catch ( Exception ex )
          au.logException( ex, log );
    log.info(userName(ctx) + "removeRowbyRowKeyStr**** - END");
} // removeRowbyRowKeyStrb) issue the setcurrentrow in the front-end to get to the correct grid row, grab the pk column# of this row, then call the service method
c) something altogether different than these ideas that escapes me right now, but is the preferred/best practice
Thanks!

Answer 1

You can use JboUtil.getRowFromKey(RowSetIterator rsi, String skey) to do the job.
You can pass any ViewObject, RowSet, or RowSetIterator to the first argument, and your string key to the second argument.
Out of curiosity, it's source code looks like this:
   static public Row getRowFromKey(RowSetIterator rsi, String sKey)
      Key key;
      try
         key = new Key(sKey, rsi.getRowSet().getViewObject().getKeyAttributeDefs());
      catch (Exception ex)
         ex.printStackTrace();
         return null;
      Row rows[] = rsi.findByKey(key,1);
      if (rows.length <= 0)
         return null;
      return rows[0];
   }