@Id
@GeneratedValue()
 public   long  getId() {
	 return  id;
}

<hibernate-mapping  package ="com.test.hibernate">
< class  name="Percent" table="DEALER_PERCENT"  abstract ="true">
    <cache usage="read-write"/>
    <composite-id>
        <key-property name="serviceProviderId" column="SERVICE_PROVIDER_ID"/>
        <key-property name="dealerId" column="DEALER_ID"/>
        <key-property name="date" column="PERCENT_DATE" type="date"/>
    </composite-id>

    <discriminator column="TYPE"/>

    <property name="value" column="PERCENT_VALUE" type="double"/>

    <subclass name="DealerPercent"/>
    <subclass name="DealerBankPercent"/>
</ class >
</hibernate-mapping>

 public   abstract   class  Percent  implements  Serializable {

     private   long  serviceProviderId;
     private   long  dealerId;


     private   double  value;

     private  Date date;

     public  Percent(){

    }

     public  Percent( long  serviceProviderId,  long  dealerId,  short  timeshift){
        Calendar calendar =  DateUtil.getFirstLocalDate(timeshift);
        calendar.add(Calendar.DAY_OF_MONTH,  1 );
         this .date = calendar.getTime();
         this .serviceProviderId = serviceProviderId;
         this .dealerId = dealerId;
    }

     public   long  getServiceProviderId() {
         return  serviceProviderId;
    }

     public   void  setServiceProviderId( long  serviceProviderId) {
         this .serviceProviderId = serviceProviderId;
    }

     public   long  getDealerId() {
         return  dealerId;
    }

     public   void  setDealerId( long  dealerId) {
         this .dealerId = dealerId;
    }

     public   double  getValue() {
         return  value;
    }

     public   void  setValue( double  value) {
         this .value = value;
    }

     public  Date getDate() {
         return  date;
    }

     public   void  setDate(Date date) {
         this .date = date;
    }


     public   boolean  equals(Object o) {
         if  ( this  == o)  return  true;
         if  (o ==  null  || getClass() != o.getClass())  return  false;

        Percent that = (Percent) o;

         if  (dealerId != that.dealerId)  return  false;
         if  (serviceProviderId != that.serviceProviderId)  return  false;
         if  ( Double .compare(that.value, value) !=  0 )  return  false;
         if  (!date.equals(that.date))  return  false;

         return  true;
    }

     public   int  hashCode() {
         int  result;
         long  temp;
        result = ( int ) (serviceProviderId ^ (serviceProviderId >>>  32 ));
        result =  31  * result + ( int ) (dealerId ^ (dealerId >>>  32 ));
        temp = value != + 0 .0d ?  Double .doubleToLongBits(value) : 0L;
        result =  31  * result + ( int ) (temp ^ (temp >>>  32 ));
        result =  31  * result + date.hashCode();
         return  result;
    }
}

 public   class  DealerPercent  extends  Percent {

     public  DealerPercent(){

    }

     public  DealerPercent( long  serviceProviderId,  long  dealerId,  short  timeshift){
        Calendar calendar =  DateUtil.getFirstLocalDate(timeshift);
        calendar.add(Calendar.DAY_OF_MONTH,  1 );
         this .setDate(calendar.getTime());
         this .setServiceProviderId(serviceProviderId);
         this .setDealerId(dealerId);
    }
}

 public   class  DealerBankPercent  extends  Percent{

     public  DealerBankPercent(){

    }

     public  DealerBankPercent( long  serviceProviderId,  long  dealerId,  short  timeshift){
        Calendar calendar =  DateUtil.getFirstLocalDate(timeshift);
        calendar.add(Calendar.DAY_OF_MONTH,  1 );
         this .setDate(calendar.getTime());
         this .setServiceProviderId(serviceProviderId);
         this .setDealerId(dealerId);
    }
}