protected String getParameterValueString() {
    List<Object> typeList = new ArrayList<Object>(columnValues.size());
    for (Object value : columnValues) {
      if (value == null) {
        typeList.add("null");
      } else {
        typeList.add(value + "(" + value.getClass().getSimpleName() + ")");
      }
    }
    final String parameters = typeList.toString();
    return parameters.substring(1, parameters.length() - 1);
  }
Base class for proxies to do logging

@author Clinton Begin
@author Eduardo Macarron
src/main/java/org/apache/ibatis/logging/jdbc/BaseJdbcLogger.java