public DataObject getMessageValues (IchannelTypeCallback callback) 

This method is called when a notification is sent to an intelligent business object. The method is supposed to return the values that are specific to the communication with this particular instance of the object – for example, an e-mail address of this instance. The method can use a callback interface to get the instance of the object and the instance of the SystemSettings object, like so:

IEntity intelligentEntity = callback.getEntity ();
IEntity systemSettings = callback.getSystemSettings ();

The method is supposed to return the data object containing specific values, or null if none are required. As an example, take a look at what the e-mail channel does:

public DataObjectgetMessageValues(IChannelTypeCallbackcallback)
{
    IEntityentity=callback.getEntity();
    if (entity==null)
        return null;
    try
    {
        StringemailAddr=(String)entity.getAttributeValue(CommonConstants.EMAIL_ADDRESS_ATTR);
        SDOTypedobType=new SDOType("EmailChannelEmailValues");
        dobType.addAttribute(CommonConstants.EMAIL_ADDRESS_ATTR,SDOType.STRING);
        DataObjectdob= new SimpleDataObject(dobType);
        dob.setAttributeValue(CommonConstants.EMAIL_ADDRESS_ATTR,emailAddr);
        return dob;
    }
    catch (Exceptione)
    {
        System.err.println("Unable to read e-mail address in object "+entity.getName());
    }
    return null;
}