I have a class called TransportJob which has a field called jobId which is a primary key) and another class called TransportJobSegment which has jobId as a foreign key. A TransportJob has many TransportJobSegments.
I am able to save the TransportJob in its table, but when I save the TransportJobSegment in its table, I get an IllegalArgumentException

Hibernate version:3.0

Mapping documents:
Mapping file for TrasportJob:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="TransportJob" table="jobs">

<id name="jobId" type="string">
<column name="job_id" length="50"/>
</id>

<property name="dependantJobId" type="string">
<column name="dependent_job_id" length="50" not-null="false" sql-type="varchar(32)"/>
</property>

<property name="jobSource" type="string">
<column name="job_source" length="50" not-null="false" sql-type="varchar(50)"/>
</property>

<property name="jobValid" type="boolean">
<column name="job_valid" not-null="true" sql-type="tinyint"/>
</property>

<property name="segmentTotal" column="segment_total" type="int"/>

<property name="creationTimestamp" type="java.util.Date">
<column name="creation_date" length="50" not-null="true" sql-type="varchar(50)"/>
</property>

<property name="revisionNumber" column="revision_number" type="long"/>

<property name="repositoryURL" type="string">
<column name="repository_url" length="50" not-null="true" sql-type="varchar(50)"/>
</property>

<property name="repositoryUUID" type="string">
<column name="repository_uuid" length="50" not-null="true"/>
</property>

</class>
</hibernate-mapping>

Mapping file for TransportJobSegment:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="TransportJobSegment" table="segments">

<id name="segmentId" type="string">
<column name="segment_id" length="50"/>
</id>

<many-to-one name="jobId" class="TransportJob" column="job_id"/>

<property name="segmentNumber" column="segment_number" type="int"/>

<property name="changeAgent" type="string">
<column name="change_agent" length="50" not-null="false" sql-type="varchar(32)"/>
</property>

<property name="changePurpose" type="string">
<column name="change_purpose" length="50" not-null="false" sql-type="varchar(50)"/>
</property>

</class>
</hibernate-mapping>

Code between sessionFactory.openSession() and session.close():
Session hibernateSession = this.hibernateSessionFactory.openSession();
try {
Transaction tx = hibernateSession.beginTransaction();
hibernateSession.save(job);
tx.commit();
} catch (HibernateException ex){
System.out.println("Hibernate Exception: Could not save the job to the database.");
}
/*
* Save the jobSegment
*/
Set<TransportJobSegment> segmentSet = job.getSegmentSet();
/*
* Get the first jobSegment. At this point only one jobSegment
* will be present in TransportJob List
*/
Iterator iter = segmentSet.iterator();
TransportJobSegment jobSegment = (TransportJobSegment)iter.next();
try {
Transaction tx2 = hibernateSession.beginTransaction();
hibernateSession.save(jobSegment);
tx2.commit();
hibernateSession.close();
}catch(HibernateException ex){
System.out.println(ex);
System.out.println("Hibernate Exception: Could not save the segment to the database.");
}

Full stack trace of any exception that occurs:

Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:
DEBUG - Returning cached instance of singleton bean 'jobDAO'
DEBUG - Returning cached instance of singleton bean 'jobSegmentDAO'
DEBUG - opened session at timestamp: 4655009582526464
DEBUG - begin
DEBUG - opening JDBC connection
DEBUG - total checked-out connections: 0
DEBUG - using pooled JDBC connection, pool size: 0
DEBUG - current autocommit status: false
DEBUG - after transaction begin
DEBUG - saving transient instance
DEBUG - generated identifier: CcdhDKst473z2FnHQ5sZNrCPKhBSXzb3, using strategy: org.hibernate.id.Assigned
DEBUG - saving [TransportJob#CcdhDKst473z2FnHQ5sZNrCPKhBSXzb3]
DEBUG - commit
DEBUG - automatically flushing session
DEBUG - flushing session
DEBUG - processing flush-time cascades
DEBUG - dirty checking collections
DEBUG - Flushing entities and processing referenced collections
DEBUG - Processing unreferenced collections
DEBUG - Scheduling collection removes/(re)creates/updates
DEBUG - Flushed: 1 insertions, 0 updates, 0 deletions to 1 objects
DEBUG - Flushed: 0 (re)creations, 0 updates, 0 removals to 0 collections
DEBUG - listing entities:
DEBUG - TransportJob{repositoryURL=repositoryURL, segmentTotal=3, dependantJobId=dependantJobID, revisionNumber=10, repositoryUUID=repositoryUUID, creationTimestamp=2006-01-05 11:02:28, jobValid=false, jobId=CcdhDKst473z2FnHQ5sZNrCPKhBSXzb3, jobSource=jobSource}
DEBUG - executing flush
DEBUG - Inserting entity: [TransportJob#CcdhDKst473z2FnHQ5sZNrCPKhBSXzb3]
DEBUG - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
DEBUG - insert into jobs (dependent_job_id, job_source, job_valid, segment_total, creation_date, revision_number, repository_url, repository_uuid, job_id) values (?, ?, ?, ?, ?, ?, ?, ?, ?)
Hibernate: insert into jobs (dependent_job_id, job_source, job_valid, segment_total, creation_date, revision_number, repository_url, repository_uuid, job_id) values (?, ?, ?, ?, ?, ?, ?, ?, ?)
DEBUG - preparing statement
DEBUG - Dehydrating entity: [TransportJob#CcdhDKst473z2FnHQ5sZNrCPKhBSXzb3]
DEBUG - binding 'dependantJobID' to parameter: 1
DEBUG - binding 'jobSource' to parameter: 2
DEBUG - binding 'false' to parameter: 3
DEBUG - binding '3' to parameter: 4
DEBUG - binding '2006-01-05 11:02:28' to parameter: 5
DEBUG - binding '10' to parameter: 6
DEBUG - binding 'repositoryURL' to parameter: 7
DEBUG - binding 'repositoryUUID' to parameter: 8
DEBUG - binding 'CcdhDKst473z2FnHQ5sZNrCPKhBSXzb3' to parameter: 9
DEBUG - Adding to batch
DEBUG - Executing batch size: 1
DEBUG - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
DEBUG - closing statement
DEBUG - post flush
DEBUG - before transaction completion
DEBUG - before transaction completion
DEBUG - committed JDBC Connection
DEBUG - after transaction completion
DEBUG - aggressively releasing JDBC connection
DEBUG - closing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)]
DEBUG - returning connection to pool, pool size: 1
DEBUG - after transaction completion
DEBUG - begin
DEBUG - opening JDBC connection
DEBUG - total checked-out connections: 0
DEBUG - using pooled JDBC connection, pool size: 0
DEBUG - current autocommit status: false
DEBUG - after transaction begin
DEBUG - saving transient instance
DEBUG - generated identifier: segmentID, using strategy: org.hibernate.id.Assigned
DEBUG - saving [TransportJobSegment#segmentID]
ERROR - IllegalArgumentException in class: TransportJob, getter method of property: jobId
org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of TransportJob.jobId
Hibernate Exception: Could not save the segment to the database.

Hi!

Am I missing something? Isn't that a parent-child relationship between TransportJob and TransportJobSegments? Should your mapping for TransportJob not contain some collection that stores the segments?

All the best,

René

TransportJob and TransportJobSegment are two seperate classes, there is no parent-child relationship between these 2 classes. I do maintain a set inside TransportJob to keep track of all the TransportJobSegments.

Should I have to create a parent-child relationship between the classes for this to work? Should I also store the Set in the TransportJob table, why should I have information about the Set in the mapping file for TransportJob?