Kettle-User Defined Java Class使用-大写转换

public boolean processRow(StepMetaInterface smi, StepDataInterface sdi) throws KettleException
{
    Object[] r = getRow();
    if (r == null) {
        setOutputDone();
        return false;
    }
    if (first){
        first = false;
    }
    r= createOutputRow(r, data.outputRowMeta.size());
    String test_value = get(Fields.In, "testfield").getString(r);
    String uppercase_value = test_value.toUpperCase();
    get(Fields.Out, "uppercase").setValue(r, uppercase_value);
    putRow(data.outputRowMeta, r);
    return true;
}