<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
   <class name="Message" table="MESSAGE">
      <composite-id name="id" class="MessageId">
         <key-many-to-one name="MsgSender" class="User">
            <column name="msgSender"/>
         </key-many-to-one>
         <key-many-to-one name="MsgDestination" class="User">
            <column name="msgDestination"/>
         </key-many-to-one>
         <key-property name="msgDateSend" type="double" column="MsgDateSend"/>
      </composite-id>
      <property name="msgContent" type="java.lang.String">
         <column name="MsgContent" />
      </property>
      <property name="isReaded" type="boolean" access="field">
         <column name="ISREADED" />
      </property>
   </class>
</hibernate-mapping>

public class Message implements Serializable {
   /**
    *
    */
   private static final long serialVersionUID = -5319468638732762052L;
   private MessageId id;
   private String msgContent;
   private boolean isReaded;
   
   public Message() {
      this.id = new msgContentId();
   }
   
   /**
    * @return the id
    */
   public MessageId getId() {
      return id;
   }

   /**
    * @param id the id to set
    */
   public void setMessageId(MessageId mId) {
      this.id = mId;
   }

   /**
    * @return the msgContent
    */
   public String getMsgContent() {
      return msgContent;
   }

   /**
    * @param msgContent
    *            the msgContent to set
    */
   public void setMsgContent(String msgContent) {
      this.msgContent = msgContent;
   }

   /**
    * @return the isReaded
    */
   public boolean getIsReaded() {
      return isReaded;
   }

   /**
    * @param isReaded
    *            the isReaded to set
    */
   public void setIsReaded(boolean isReaded) {
      this.isReaded = isReaded;
   }
}

public class MessageId implements Serializable{
   /**
    *
    */
   private static final long serialVersionUID = 1L;
   User msgSender;
   User msgDestination;
   double msgSend;
   

   /**
    * @return the msgSender
    */
   public User getMsgSender() {
      return msgSender;
   }

   /**
    * @param msgSender
    *            the msgSender to set
    */
   public void setMsgSender(User msgSender) {
      this.msgSender = msgSender;
   }

   /**
    * @return the msgDestination
    */
   public User getMsgDestination() {
      return msgDestination;
   }

   /**
    * @param msgDestination
    *            the msgDestination to set
    */
   public void setMsgDestination(User msgDestination) {
      this.msgDestination = msgDestination;
   }

   /**
    * @return the msgSend
    */
   public double getMsgSend() {
      return msgSend;
   }

   /**
    * @param msgSend
    *            the msgSend to set
    */
   public void setMsgSend(double msgSend) {
      this.msgSend = msgSend;
   }
}