buffer.append(_tableName);
buffer.append(_table.getName());
    public String toString()    {        StringBuffer buffer = new StringBuffer();        buffer.append(_tableName);        buffer.append(":");        for (Iterator it = _columnValues.entrySet().iterator(); it.hasNext();)        {            Map.Entry entry = (Map.Entry)it.next();            buffer.append(entry.getKey());            buffer.append("=");            buffer.append(entry.getValue());            if (it.hasNext())            {                buffer.append(";");            }        }        return buffer.toString();    }