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 Post subject: Joined SubClass List Retrieval
PostPosted: Wed Dec 28, 2016 5:29 am 
Newbie

Joined: Wed Dec 28, 2016 5:15 am
Posts: 1
Code:
ClassA Extends ClassB {
List<ClassC> classCList;
// bunch of getters and setters
}


Hibernate mapping

Code:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<!-- Generated Oct 16, 2016 4:44:43 PM by Hibernate Tools 5.1.0.Beta1 -->
<hibernate-mapping package="com.dto">

   <class name="ClassB " table="ClassB ">
   <id name="classBId" type="java.lang.Integer">
      <column name="classBId" />
      <generator class="identity" />
   </id>
   <key column="ClassBId" />
   // // bunch of property tag to specify the attributes of class
   <property name="tag" />

   <joined-subclass name="ClassA" table="ClassA " extends="ClassB">
      <key column="ClassBId" />
      // bunch of property tag to specify the attributes of class
      <list name="classCList" table="ClassC" inverse="true" lazy="true"
         fetch="select" cascade="all">
         <key>
            <column name="classAId" not-null="true" />
         </key>
         <list-index column="idx" />
         <one-to-many class="ClassC" />
      </list>
   </joined-subclass>
</class>

<class name="ClassC" table="ClassC" optimistic-lock="version">
   <id name="classCId" type="java.lang.Integer">
      <column name="classCId" />
      <generator class="identity" />
   </id>
   // bunch of property tag to specify the attributes of class
   <property name="name" type="string">
      <column name="name" />
   </property>
</class>
</hibernate-mapping>



Method to retrieve the List of Class C is as follows:


Code:
Criteria crit = session.createCriteria(ClassA.class);
      crit.add(Restrictions.eq("revison", revison));
      crit.setMaxResults(25);
      
      classAlist = (List<ClassA> )crit.list();
      for(ClassA classA: classAlist ) {
    List<ClassC> classCList = classA.getclassCList ();


//here the list named classCList is empty.

Provide suggestions to retrieve the classCList .

But if I change the key column of the Joined-subclass to the following:

Code:
<joined-subclass name="ClassA" table="ClassA " extends="ClassB">
      <key column="ClassAId" />
      // bunch of property tag to specify the attributes of class
      <list name="classCList" table="ClassC" inverse="true" lazy="true"
         fetch="select" cascade="all">
         <key>
            <column name="classAId" not-null="true" />
         </key>
         <list-index column="idx" />
         <one-to-many class="ClassC" />
      </list>
   </joined-subclass>


Then the ClassC list has last element added.
Need to retrieve all elements of the list in ClassC. Please Suggest


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