Hibernate version:
2.1.6 (I think, I'm using latest MyEclipse)
Mapping documents:
Component.hbm.xml:
Code:
<hibernate-mapping package="com.frontier.hibernate">
<class name="Component" table="component">
<id name="idComponent" column="ID_COMPONENT" type="java.lang.Integer">
<generator class="native"/>
</id>
<property name="cdComponent" column="CD_COMPONENT" type="java.lang.String" />
<property name="omschrijving" column="OMSCHRIJVING" type="java.lang.String" />
<property name="langeOmschrijving" column="LANGE_OMSCHRIJVING" type="java.lang.String" />
<property name="indBedragwaarde" column="IND_BEDRAGWAARDE" type="java.lang.String" />
<property name="indPrint" column="IND_PRINT" type="java.lang.String" />
<property name="indSubcomponent" column="IND_SUBCOMPONENT" type="java.lang.String" />
<property name="rowVersion" column="ROW_VERSION" type="java.lang.Integer" />
</class>
</hibernate-mapping>
Code:
<hibernate-mapping package="com.frontier.hibernate">
<class name="Subcomponent" table="subcomponent">
<composite-id name="id" class="SubcomponentKey">
<key-many-to-one name="component" column="ID_COMPONENT" class="Component"/>
<key-property name="idSubcomponent" column="ID_SUBCOMPONENT" type="java.lang.Integer"/>
</composite-id>
<property name="calcOperator" column="CALC_OPERATOR" type="java.lang.String" />
<property name="rowVersion" column="ROW_VERSION" type="java.lang.Integer" />
</class>
</hibernate-mapping>
From my HibernateUtil.java or the Interface class?
Name and version of the database you are using:mySQL 4.1.7 with InnoDB Tables
My question:I'm rather new to struts and hibernate.
I have two tables: Component with PK id_component and Subcomponent which has a composite key that consists of foreign key id_component and it's own auto increment id_subcomponent.
I'm using myEclipse and started out with a interactive tutorial that's on their site and just "rewrote" their code to test this.
First i got Component.java:
Code:
package com.frontier.hibernate;
import java.io.Serializable;
/**
* A class that represents a row in the 'component' table.
* This class may be customized as it is never re-generated
* after being created.
*/
public class Component
extends AbstractComponent
implements Serializable
{
/**
* Simple constructor of Component instances.
*/
public Component()
{
}
/**
* Constructor of Component instances given a simple primary key.
* @param idComponent
*/
public Component(java.lang.Integer idComponent)
{
super(idComponent);
}
/* Add customized code below */
}
Then Subcomponent.java:
Code:
package com.frontier.hibernate;
import java.io.Serializable;
/**
* A class that represents a row in the 'subcomponent' table.
* This class may be customized as it is never re-generated
* after being created.
*/
public class Subcomponent
extends AbstractSubcomponent
implements Serializable
{
/**
* Simple constructor of Subcomponent instances.
*/
public Subcomponent()
{
}
/**
* Constructor of Subcomponent instances given a composite primary key.
* @param id
*/
public Subcomponent(SubcomponentKey id)
{
super(id);
}
/* Add customized code below */
}
This is my interface class ComponentService.java, I'm just gonna put the Add (insert) method. It isn't correct like this. It's something I just tried, without the subcomponent handlings (only component thus) it works:
Code:
public void addComponent(Component data, Subcomponent subdata)
{
Session session = null;
try
{
session = HibernateUtil.getSession();
HibernateUtil.beginTransaction();
session.save(data);
session.save(subdata);
HibernateUtil.commitTransaction();
session.flush();
}
catch (HibernateException e)
{
System.err.println("Hibernate Exception" + e.getMessage());
throw new RuntimeException(e);
}
finally
{
if (session != null)
{
HibernateUtil.closeSession();
}
}
}
And this is the execute from my action class:
Code:
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
ComponentForm AddComponentForm = (ComponentForm) form;
if (AddComponentForm.getOmschrijving() != null)
{
Component component = new Component();
component.setCdComponent(AddComponentForm.getCdComponent());
component.setOmschrijving(AddComponentForm.getOmschrijving());
component.setLangeOmschrijving(AddComponentForm.getLangeOmschrijving());
component.setIndBedragwaarde(AddComponentForm.getIndBedragwaarde());
component.setIndPrint(AddComponentForm.getIndPrint());
component.setIndSubcomponent(AddComponentForm.getIndSubcomponent());
ComponentService.getInstance().addComponent(component);
AddComponentForm.clear();
}
I have a ComponentForm.java with the getters and setters and tried to declarate SubcomponetKey idSubcomponent; and put a setter for that, but I dunno..
I've read the hibernate docs about composite id's and components (chapter 7 i believe), but either I'm experiencing a blackout or i'm a real n00b.
I just want to fill in my form to add a component, and when it's a subcomponent insert the idSubcomponent (i got a checkbox in the form to indicate that) in the Subcomponent table and get the associated idComponent (FK) with it and store it also in the Subcomponent table.
How?
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