ResolveParameter class, an Important commerce tool !!

ResolveParameter is a very important class when implementing custom code in commerce and I am sure, it is a very important tool for commerce developers doing custom implementations. When a custom implementation requires to post multiple name/value pairs of the same type, this class is really useful.
e.g. URL params
catentryId_12343=value1,catentryId_22343=value2,catentryId_32343=value3
orderItemStatus_10000=value10001,orderitemsStatus_10004=value

//resolve params in request properties, returns the hashtable of name, value pairs.
public void setRequestProperties(TypedProperty reqProperties) throws ECException {
ihshCatentry_id  = ResolveParameter.resolveValues(OrderConstants.EC_CATENTRY_ID,  requestProperties, false);
}


Couple of other methods from ResolveParameter that I find useful from time to time.

/*
* returns the order item status from the hash table using the resolve parameter method.
*/
protected String getOrderItemStatus(Integer i, Hashtable hashOrderItemStatus )
  throws InvalidParameterValueException
{
String methodName = "getOrderItemStatus";
  String orderItemStatus;
  try
  {
  orderItemStatus = ResolveParameter.getString(i, hashOrderItemStatus);
  } catch (NumberFormatException ex) {
    throw new InvalidParameterValueException("orderItemId",
      ex.getMessage());
  }
  return orderItemStatus;
}    
/*
* returns the order item item id from the hash table using the resolve parameter method.
*/
protected Long getOrderItemId(Integer i, Hashtable hashOrderitemId )
  throws InvalidParameterValueException
{

  Long orderItemId;
  try
  {
    orderItemId = ResolveParameter.getLong(i, hashOrderitemId);
  } catch (NumberFormatException ex) {
    throw new InvalidParameterValueException("orderItemId",
      ex.getMessage());
  }
  return orderItemId;
}