public class RGB {
   
   private int red;
   private int green;
   private int blue;
   
   public RGB() {}
...

public class DeviceTypeDao implements Serializable {

   private long id;
   
   private String name;
   private String description;
   private double angle;
   
   // TODO
   private Map<Integer,RGB> channelToRgb;
   
   private double intensity;
   private int xAxis;
   private int yAxis;
   private int zAxis;
   private boolean fog;
   
   public DeviceTypeDao() {}

...

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
<hibernate-mapping>
    <class name="com.schmit.marco.DeviceTypeDao">
        <id name="id">
            <generator class="increment"/>
        </id>
       
        <property name="name" type="string"/>
        <property name="description" type="string"/>
        <property name="angle" type="double"/>
        <property name="intensity" type="double"/>
        <property name="xAxis" type="integer"/>
        <property name="yAxis" type="integer"/>
        <property name="zAxis" type="integer"/>
        <property name="fog" type="boolean"/>
       
        <map name="channelToRgb" cascade="all">
            <key column="deviceTypeId"/>
            <index column="channelNumber" type="integer"/>
            // RGB?? ##############################
        </map>
    </class>   
</hibernate-mapping>