Bound numeric values

Could anyone post a groovy code example how to bound the values of one or more columns
to a defined value? Or is there a documentation of how to apply Groovy to make this myself?

Ok, even if I get the impression to permanently monologize in this forum    - while searching the web I found this link here
http://rapid-i.com/component/option,com_myblog/show,New-Feature-Script-Operator-in-RapidMiner-4.5.html/Itemid,172/lang,en/
with an example which I customized to:

ExampleSet exampleSet = operator.getInput(ExampleSet.class);

for (Attribute attribute : exampleSet.getAttributes()) 
{
  String name = attribute.getName();
  double bound = 3;
  for (Example example : exampleSet) 
  {
    if(example[name]<=-bound)
      example[name] = -bound;
    else if(example[name]>=bound)
      example[name] = bound;
  }
}

return exampleSet; 

This will do the job, even if I don't know currently how to access also the label value.