How to do a Merge in a hibernate component

Hello guys,

I have the following problem

, CustomerVoucherAgreementImpl.class (table="E_VOUCHER_CUST_AGREEMENT") has a shared component(orderRelatedData) with his child CustomerVoucherAgreementImplCL.class (table="E_VOUCHER_CUST_AGREEMENT_CL"), and when I try to read a CustomerVoucherAgreementImplCL.class(the select statement is correctly executed and brings all the requested values), the orderRelatedData component sets to null the attributes filled by first join(E_VOUCHER_CUST_AGREEMENT).
The question is, How can I merge a component from 2 tables?.

E_VOUCHER_CUST_AGREEMENT table (CustomerVoucherAgreementImpl.class)

<hibernate-mapping>
	<subclass name="CustomerVoucherAgreementImpl" extends="BaseCustomerAgreement" lazy="false" >
		<join table="E_VOUCHER_CUST_AGREEMENT">
			<key column="AGREEMENT_ID" not-null="true" unique="true"/>
			<component name="orderRelatedData" class="CustomerAgreementOrderRelatedDataCL" lazy="false">
				<property name="rememberOrderMonthDay" column="N_REMEMBERORDERMONTH_DAY" type="integer" />
				<property name="maximumOrderRequestMonthDay" column="N_MAXREQUESTORDERMONTHDAY" type="integer" />
				<property name="maximumOrderDeliveryMonthDay" column="N_MAX_DELIVERORDERMONTHDAY" type="integer" />
				<property name="lastPersonalizedOrder" column="D_LASTPERSONALIZEDORDER" type="date" />
				<property name="lastNotPersonalizedOrder" column="D_LASTNOTPERSONALIZEDORDER" type="date" />
			</component>
			<component name="physicalSupportSpecification" class="PhysicalSupportSpecificationCL" lazy="false"> 
    			<property name="mediaSupportTypes" column="VSMEDIAPHYSICALSUPPORTTYPE_ID" type="long" not-null="true" />
    			<property name="validityPeriodTypeSpecification" column="VALPERIODTPSPECIF_ID" type="long" />
			</component>
			<property name="deliveryStructure" column="DELIVERYNODE_ID" type="long" />	
			<component name="packagingSpecification" class="CustomerAgreementPackagingSpecification" lazy="false">
				<property name="containerStructure" column="STRUCTURE_ID" type="long" />
			</component>
		</join>
	</subclass>
</hibernate-mapping>

E_VOUCHER_CUST_AGREEMENT_CL table (CustomerVoucherAgreementImplCL.class)

<hibernate-mapping>
	<subclass name="CustomerVoucherAgreementImplCL" extends="CustomerVoucherAgreementImpl" lazy="false" >
		<meta attribute="orderRelatedData" inherit="true" />
		<meta attribute="physicalSupportSpecification" inherit="true" />
		<join table="E_VOUCHER_CUST_AGREEMENT_CL" inverse="true">
			<key column="AGREEMENT_ID"/>
			<component name="orderRelatedData" class="CustomerAgreementOrderRelatedDataCL" lazy="false">
				<property name="deliverFormOrder" column="B_DELIVERFORM" type="true_false" />
				<property name="sendBeneficiaryList" column="B_SENDBENEFICIARYLIST" type="true_false" />
				<property name="loadOrderByNodeCode" column="B_LOADORDERBYNODECODE" type="true_false" />
				<property name="loadExtendedOrder" column="B_LOADEXTENDEDORDER" type="true_false" />
				<component name="automaticOrderGenerationSpecification" class="AutomaticOrderGenerationSpecificationCL" lazy="false">
					<property name="automaticGenerationDay" column="Q_AUTOMATICGENERATIONDAY" type="integer"></property>
					<property name="automaticGeneration" column="B_AUTOMATICORDERGENERATION" type="true_false"></property>
				</component>
			</component>
			<component name="physicalSupportSpecification" class="PhysicalSupportSpecificationCL" lazy="false">
				<property name="beneficiaryExpirationTypes" column="VSBENEFICIARYEXPIRATIONTYPE_ID" type="long" />
				<property name="consumptionDays" column="Q_CONSUMPTIONSDAYS" type="integer" />
				<property name="noBeneficiaryExpirationTypes" column="VSNOBENEFICIARYEXPTYPE_ID" type="long" />
				<property name="qtyOfMonthBeforeConsumption" column="Q_MONTHFORCREATEBEFORECONSUMPT" type="integer" />
			</component>
		</join>
	</subclass>
</hibernate-mapping>

CustomerAgreementOrderRelatedData.class

import java.util.Date;

public class CustomerAgreementOrderRelatedData {

protected Integer rememberOrderMonthDay; 		
    protected Integer maximumOrderRequestMonthDay; 	
    protected Integer maximumOrderDeliveryMonthDay;	
    protected Date lastPersonalizedOrder;				
    protected Date lastNotPersonalizedOrder;

protected CustomerAgreementOrderRelatedData() { }

public Date getLastNotPersonalizedOrder() {
        return this.lastNotPersonalizedOrder;
    }

public void setLastNotPersonalizedOrder(Date lastNotPersonalizedOrder) {
        this.lastNotPersonalizedOrder = lastNotPersonalizedOrder;
    }

public Date getLastPersonalizedOrder() {
        return this.lastPersonalizedOrder;
    }

public void setLastPersonalizedOrder(Date lastPersonalizedOrder) {
        this.lastPersonalizedOrder = lastPersonalizedOrder;
    }

public Integer getMaximumOrderDeliveryMonthDay() {
        return this.maximumOrderDeliveryMonthDay;
    }

public void setMaximumOrderDeliveryMonthDay(Integer maximumOrderDeliveryMonthDay) {
        this.maximumOrderDeliveryMonthDay = maximumOrderDeliveryMonthDay;
    }

public Integer getMaximumOrderRequestMonthDay() {
        return this.maximumOrderRequestMonthDay;
    }

public void setMaximumOrderRequestMonthDay(Integer maximumOrderRequestMonthDay) {
        this.maximumOrderRequestMonthDay = maximumOrderRequestMonthDay;
    }

public Integer getRememberOrderMonthDay() {
        return this.rememberOrderMonthDay;
    }
	
    public void setRememberOrderMonthDay(Integer rememberOrderMonthDay) {
        this.rememberOrderMonthDay = rememberOrderMonthDay;
    }
}

CustomerAgreementOrderRelatedDataCL.class

public class CustomerAgreementOrderRelatedDataCL extends CustomerAgreementOrderRelatedData {

private Boolean deliverFormOrder;				
    private Boolean sendBeneficiaryList; 			
    private Boolean loadOrderByNodeCode;
    private Boolean loadExtendedOrder;
    private AutomaticOrderGenerationSpecificationCL automaticOrderGenerationSpecification;
    
    protected CustomerAgreementOrderRelatedDataCL() {
    	super();
    }

public Boolean getDeliverFormOrder() {
        return this.deliverFormOrder;
    }

public void setDeliverFormOrder(Boolean deliverFormOrder) {
        this.deliverFormOrder = deliverFormOrder;
    }
    
    public Boolean getSendBeneficiaryList() {
        return this.sendBeneficiaryList;
    }

public void setSendBeneficiaryList(Boolean sendBeneficiaryList) {
        this.sendBeneficiaryList = sendBeneficiaryList;
    }

public Boolean getLoadOrderByNodeCode() {
        return this.loadOrderByNodeCode;
    }

public void setLoadOrderByNodeCode(Boolean loadOrderByNodeCode) {
        this.loadOrderByNodeCode = loadOrderByNodeCode;
    }
    
    public Boolean getLoadExtendedOrder() {
        if (this.loadExtendedOrder == null){
            return Boolean.FALSE;
        }
        return this.loadExtendedOrder;
    }

public void setLoadExtendedOrder(Boolean loadExtendedOrder) {
        this.loadExtendedOrder = loadExtendedOrder;
    }
    
    public AutomaticOrderGenerationSpecificationCL getAutomaticOrderGenerationSpecification() {
        return this.automaticOrderGenerationSpecification;
    }

public void setAutomaticOrderGenerationSpecification(AutomaticOrderGenerationSpecificationCL automaticOrderGenerationSpecification) {
        this.automaticOrderGenerationSpecification = automaticOrderGenerationSpecification;
    }    
}

Thanks in advance.

I have found a really ugly way...

This case can be resolved by "formula", so, we have to concat the original alias and the column name.

<property name="maximumOrderRequestMonthDay" column="N_MAXREQUESTORDERMONTHDAY" type="integer" formula="customervo0_2_.N_MAXREQUESTORDERMONTHDAY" />

E_VOUCHER_CUST_AGREEMENT_CL table (CustomerVoucherAgreementImplCL.class)

<hibernate-mapping>
	<subclass name="CustomerVoucherAgreementImplCL" extends="CustomerVoucherAgreementImpl">
		<join table="E_VOUCHER_CUST_AGREEMENT_CL">
			<key column="AGREEMENT_ID"/>
			<component name="orderRelatedData" class="CustomerAgreementOrderRelatedDataCL">
                                                
				<property name="maximumOrderRequestMonthDay" column="N_MAXREQUESTORDERMONTHDAY" type="integer" formula="customervo0_2_.N_MAXREQUESTORDERMONTHDAY" />
				<property name="maximumOrderDeliveryMonthDay" column="N_MAX_DELIVERORDERMONTHDAY" type="integer" formula="customervo0_2_.N_MAX_DELIVERORDERMONTHDAY" />
				<property name="lastPersonalizedOrder" column="D_LASTPERSONALIZEDORDER" type="date" formula="customervo0_2_.D_LASTPERSONALIZEDORDER" />
				<property name="lastNotPersonalizedOrder" column="D_LASTNOTPERSONALIZEDORDER" type="date" formula="customervo0_2_.D_LASTNOTPERSONALIZEDORDER" />
				<property name="rememberOrderMonthDay" column="N_REMEMBERORDERMONTH_DAY" type="integer" formula="customervo0_2_.N_REMEMBERORDERMONTH_DAY" />
                                                
				<property name="deliverFormOrder" column="B_DELIVERFORM" type="true_false" />
				<property name="sendBeneficiaryList" column="B_SENDBENEFICIARYLIST" type="true_false" />
				<property name="loadOrderByNodeCode" column="B_LOADORDERBYNODECODE" type="true_false" />
				<property name="loadExtendedOrder" column="B_LOADEXTENDEDORDER" type="true_false" />
				<component name="automaticOrderGenerationSpecification" class="AutomaticOrderGenerationSpecificationCL">
					<property name="automaticGenerationDay" column="Q_AUTOMATICGENERATIONDAY" type="integer"></property>
					<property name="automaticGeneration" column="B_AUTOMATICORDERGENERATION" type="true_false"></property>
				</component>
			</component>
			<component name="physicalSupportSpecification" class="PhysicalSupportSpecificationCL">
                                                
				<property name="mediaSupportTypes" column="VSMEDIAPHYSICALSUPPORTTYPE_ID" type="long" not-null="true" formula="customervo0_2_.VSMEDIAPHYSICALSUPPORTTYPE_ID" />
    			<property name="validityPeriodTypeSpecification" column="VALPERIODTPSPECIF_ID" type="long" formula="customervo0_2_.VALPERIODTPSPECIF_ID" />
                                                 
				<property name="beneficiaryExpirationTypes" column="VSBENEFICIARYEXPIRATIONTYPE_ID" type="long" />
				<property name="consumptionDays" column="Q_CONSUMPTIONSDAYS" type="integer" />
				<property name="noBeneficiaryExpirationTypes" column="VSNOBENEFICIARYEXPTYPE_ID" type="long" />
				<property name="qtyOfMonthBeforeConsumption" column="Q_MONTHFORCREATEBEFORECONSUMPT" type="integer" />
			</component>
		</join>
	</subclass>
</hibernate-mapping>

Now we need to know if is it possible to define a static alias, when we define a table, for example, inside of a join element, obviously I saw the DTD and isn't possible, but maybe there is another way that you want to share with us. We know that the alias is defined by Hibernate and that's why we want to get the control of it.

Thanks in advance.