Hi,

I have a problem with the method session.load(class, id), I have a ClassCastException
when I call a method


see the Exception :
java.lang.ClassCastException: java.lang.String
at genoplante.cargo.db.transcriptome.orm.hibernate.Hybridization$$EnhancedByCGLIB$$0.getHybridization_id(<generated>)
at genoplante.TestTranscriptomeConfiguration.main(TestTranscriptomeConfiguration.java:52)

see my code :

URLconfigFile=TestTranscriptomeConfiguration.class.getResource("/resources/transcriptome/transcriptome.cfg.xml");
Configuration cfg = (new Configuration()).configure(configFile);
SessionFactory sessions = cfg.buildSessionFactory();
Session s = sessions.openSession();
Hybridizationh=(Hybridization)s.load(genoplante.cargo.db.transcriptome.orm.hibernate.Hybridization.class, "2");

System.out.println(h.getHybridization_id().toString());
s.close();



see my mapping file :

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping>
<class
name="genoplante.cargo.db.transcriptome.orm.hibernate.Hybridization"
table="HYBRIDIZATION"
proxy="genoplante.cargo.db.transcriptome.orm.hibernate.Hybridization"
dynamic-update="false"
dynamic-insert="false"
>

<jcs-cache usage="read-only" />

<id
name="hybridization_id"
column="HYBRIDIZATION_ID"
type="java.lang.Integer"
>
<generator class="sequence">
</generator>
</id>

<property
name="order_nr"
type="java.lang.Integer"
update="true"
insert="true"
>
<column
name="ORDER_NR"
sql-type="INTEGER(9)"
/>
</property>

<property
name="is_replicated"
type="java.lang.Boolean"
update="true"
insert="true"
>
<column
name="IS_REPLICATED"
sql-type="BIT"
/>
</property>

<property
name="hybridization_date"
type="java.util.Date"
update="true"
insert="true"
>
<column
name="HYBRIDIZATION_DATE"
sql-type="DATETIME"
/>
</property>

<property
name="description"
type="java.lang.String"
update="true"
insert="true"
>
<column
name="DESCRIPTION"
sql-type="VARCHAR(255)"
/>
</property>

<set
name="labeled_extract"
table="HYBR_LABELED_EXTRACT"
lazy="true"
inverse="false"
cascade="none"
sort="unsorted"
>
<jcs-cache
usage="read-only"
/>

<key
column="HYBRIDIZATION_ID"
/>

<many-to-many
class="genoplante.cargo.db.transcriptome.orm.hibernate.Labeled_Extract"
column="LABELED_EXTRACT_ID"
outer-join="auto"
/>

</set>

<set
name="experiment_t"
table="EXP_HYBR"
lazy="true"
inverse="false"
cascade="none"
sort="unsorted"
>
<jcs-cache
usage="read-only"
/>

<key
column="HYBRIDIZATION_ID"
/>

<many-to-many
class="genoplante.cargo.db.transcriptome.orm.hibernate.Experiment"
column="EXPERIMENT_ID"
outer-join="auto"
/>

</set>

<set
name="image_scanning"
lazy="true"
inverse="false"
cascade="none"
sort="unsorted"
>
<jcs-cache
usage="read-only"
/>

<key
column="HYBRIDIZATION_ID"
/>

<one-to-many
class="genoplante.cargo.db.transcriptome.orm.hibernate.Image_Scanning"
/>
</set>

<property
name="operator_id"
type="java.lang.Integer"
update="true"
insert="true"
>
<column
name="OPERATOR_ID"
sql-type="INTEGER(9)"
/>
</property>

<many-to-one
name="operator"
class="genoplante.cargo.db.transcriptome.orm.hibernate.Operator"
cascade="none"
outer-join="auto"
update="false"
insert="false"
>
<column
name="OPERATOR_ID"
/>
</many-to-one>

<property
name="array_id"
type="java.lang.Integer"
update="true"
insert="true"
>
<column
name="ARRAY_ID"
sql-type="INTEGER(9)"
/>
</property>

<many-to-one
name="array"
class="genoplante.cargo.db.transcriptome.orm.hibernate.Array"
cascade="none"
outer-join="auto"
update="false"
insert="false"
>
<column
name="ARRAY_ID"
/>
</many-to-one>

<property
name="hybridization_link_id"
type="java.lang.Integer"
update="true"
insert="true"
>
<column
name="HYBRIDIZATION_LINK_ID"
sql-type="INTEGER(9)"
/>
</property>

<many-to-one
name="hybridization_link"
class="genoplante.cargo.db.transcriptome.orm.hibernate.Hybridization"
cascade="none"
outer-join="auto"
update="false"
insert="false"
>
<column
name="HYBRIDIZATION_LINK_ID"
/>
</many-to-one>

<set
name="hybridization"
lazy="true"
inverse="false"
cascade="none"
sort="unsorted"
>
<jcs-cache
usage="read-only"
/>

<key
column="HYBRIDIZATION_LINK_ID"
/>

<one-to-many
class="genoplante.cargo.db.transcriptome.orm.hibernate.Hybridization"
/>
</set>

<property
name="protocol_id"
type="java.lang.Integer"
update="true"
insert="true"
>
<column
name="PROTOCOL_ID"
sql-type="INTEGER(9)"
/>
</property>

<many-to-one
name="protocol"
class="genoplante.cargo.db.transcriptome.orm.hibernate.Protocol"
cascade="none"
outer-join="auto"
update="false"
insert="false"
>
<column
name="PROTOCOL_ID"
/>
</many-to-one>

<!--
To add non XDoclet property mappings, create a file named
hibernate-properties-Hybridization.xml
containing the additional properties and place it in your merge dir.
-->

</class>

</hibernate-mapping>


But when I use the method session.find("from Hybridization.class c where c.id=2");
I don't have any exception.


Do you have any idea.
Thank for your help

Guillaume

In your mapping, you declare your ID as an Integer.
When you call session.load(), you pass it a String.

Hence the ClassCastException...