fetching strategy Problem
In order to prevent the loading of the whole graph of every associated object,
I've configured all my associations fetching to lazy.
here is an example of what I've done:
My StructureSocieteGestion class is associated to my Structure
class by à many to one
association.
Here are fragment codes of both Classes and corresponding mappng files
public class Structure implements Serializable
{
private String codeStructure;
//some other properties
// getters, setter ,equals and hashcode
public Structure(){}
}
corresponding mapping fragment :
<hibernate-mapping
>
<class
name="com.nxbp.nis.biosphere.model.Structure"
table="T_Structure"
lazy="true" >
<id
name="codeStructure"
column="CodeStructure"
type="java.lang.String"
>
<generator class="assigned">
</generator>
</id>
<property
name="procedureAllegee"
type="boolean"
/>
// some other properties
Now my StructureSocieteGestion class and mapping:
public class StructureSocieteGestion implements Serializable{
private Long identifiant;
private Structure structure;
//some other properties
// getters, setter ,equals and hashcode,default constructor
}
the corresponding mapping fragment
<hibernate-mapping
>
<class
name="com.nxbp.nis.biosphere.model.StructureSociet eGestion"
table="T_Structure_SocieteGestion"
>
<id
name="identifiant"
column="Identifiant"
type="java.lang.Long"
>
<generator class="identity">
</generator>
</id>
//some properties ...
//the structure many to one association
<many-to-one
name="structure"
class="com.nxbp.nis.biosphere.model.Structure"
cascade="none"
outer-join="auto"
access="property"
>
<column
name="CodeStructure"
/>
</many-to-one>
>
In my StructureSocieteGestionDAO, I'm using a fetchMode upon the criteria api when I need to override the default fetching strategy.
It works fine (here is an example)
public Object doInHibernate(Session session) throws HibernateException
{
Criteria criteria = session.createCriteria(TStructureSocieteGestion.cl ass);
criteria.add(Expression.eq("structure.codeStructur e", codeStructure));
criteria.add(Expression.le("dateDebutValidite", now));
criteria.add(Expression.ge("dateFinValidite", now));
criteria.setFetchMode("structure",FetchMode.EAGER) ; return criteria.uniqueResult();
The problem arise when I try to load object from my StructureDAO side.
I'm doing like that :
public Structure findById(String codeStructure) throws FinderException
{
Structure result=null;
try
{
result=(Structure)getHibernateTemplate().load(Stru cture.class,codeStructure);
}
I'm getting an LazyInitialisationException when this method executes.
Can someone tells me how I could workaround this problem.
Meissa
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Originally Posted by meissa
