Hello,

I can't map a component containing just an array of 2 properties.
I tryied with Hibernate 3.1

In my example, a BeanNetwork has a member line
which is a component contains an array of route (a route is a couple of string properties).

Does anybody know how to do it ?
Thanks a lot to help me.

I give all the details of my test below:

Ihe only mapping file (BeanNetwork.hbm.xml) is here,
<class name="test.hibernate.BeanNetwork"
table="network"
dynamic-update="false"
dynamic-insert="false">
<id name="id" column="id" type="long">
<generator class="native"/>
</id>
<property name="name"
type="string"
update="true"
insert="true"
access="property"
not-null="true"
column="messageFlash"
/>
<component name="line"
class="test.hibernate.Line">
<array name="Routes"
table="line_route">
<key column="id"/>
<list-index column="position"/>
<composite-element class="test.hibernate.Route">
<property name="name" column="name" not-null="true"/>
<property name="company" column="company" not-null="true"/>
</composite-element>
</array>
</component>
</class>

Here is the test I've launched (in a junit TestCase class):
//--------------------------------------------------
public void test_create()
{
Route routeA = new Route();
Route routeB = new Route();
Route[] routeArray = new Route[]{ routeA, routeB};
routeA.setCompany( "Comp A");
routeA.setName( "route A");
routeB.setCompany( "Comp B");
routeB.setName( "route B");

Line line = new Line();
BeanNetwork network = new BeanNetwork();

Session aSession = null;
Transaction aTransaction = null;
try
{
line.setRoutes( routeArray);
network.setName( "Network 1");
network.setLine( line);

// Create a Sesssion
aSession = _session_factory.openSession();

// Open a transaction
aTransaction = aSession.beginTransaction();

// Save
aSession.save( network);

// Commit transaction,
aTransaction.commit(); // An Exception is raised HERE !!
//--------------------------------------------------

The Full stack trace I've got is just bellow:
java.lang.NullPointerException
at org.hibernate.engine.Collections.processReachableCollection(Collections.java:147)
at org.hibernate.event.def.FlushVisitor.processCollection(FlushVisitor.java:37)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:101)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:61)
at org.hibernate.event.def.AbstractVisitor.processValues(AbstractVisitor.java:40)
at org.hibernate.event.def.AbstractVisitor.processComponent(AbstractVisitor.java:82)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:107)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:61)
at org.hibernate.event.def.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:55)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:124)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:195)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:980)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:353)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at test.hibernate.TestNetwork.test_create(TestNetwork.java:150)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)


My 3 classes: Route, Line and BeanNetwork:
//--------------------------------------------------
package test.hibernate;
public class Route
{
private String name = null;
private String company = null;

public Route() {
super();
}
public String getCompany()
{
return company;
}
public void setCompany( String company)
{
this.company = company;
}
public String getName()
{
return name;
}
public void setName( String name)
{
this.name = name;
}
}
//--------------------------------------------------
package test.hibernate;

import java.util.Vector;

public class Line
{
private java.util.Vector routeInfo;

public Line() {
super();
routeInfo = new Vector();
}

public void setRoutes(Route[] routeArray)
{
//-- copy array
routeInfo.removeAllElements();
for (int i = 0; i < routeArray.length; i++) {
routeInfo.addElement(routeArray[i]);
}
}

public Route[] getRoutes()
{
int size = routeInfo.size();
Route[] mArray = new Route[size];
for (int index = 0; index < size; index++) {
mArray[index] = (Route) routeInfo.elementAt(index);
}
return mArray;
}
}

//--------------------------------------------------

package test.hibernate;

public class BeanNetwork
{
private long id = 0L;
private String name = null;
private Line line = null;

public BeanNetwork() {
super();
}
public long getId()
{
return id;
}
public void setId( long id)
{
this.id = id;
}
public Line getLine()
{
return line;
}
public void setLine( Line line)
{
this.line = line;
}
public String getName()
{
return name;
}
public void setName( String name)
{
this.name = name;
}
}

//--------------------------------------------------

As it may help, I have copied the Hibernate log below:


2006-01-02 12:38:57,071 [main] DEBUG org.hibernate.transaction.JDBCTransaction - current autocommit status: false
3154 [main] DEBUG org.hibernate.transaction.JDBCTransaction - current autocommit status: false
2006-01-02 12:38:57,071 [main] DEBUG org.hibernate.jdbc.JDBCContext - after transaction begin
3154 [main] DEBUG org.hibernate.jdbc.JDBCContext - after transaction begin
2006-01-02 12:38:57,071 [main] DEBUG org.hibernate.event.def.DefaultSaveOrUpdateEventListener - saving transient instance
3154 [main] DEBUG org.hibernate.event.def.DefaultSaveOrUpdateEventListener - saving transient instance
2006-01-02 12:38:57,071 [main] DEBUG org.hibernate.jdbc.AbstractBatcher - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
3154 [main] DEBUG org.hibernate.jdbc.AbstractBatcher - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
2006-01-02 12:38:57,071 [main] DEBUG org.hibernate.SQL - select nextval ('hibernate_sequence')
3154 [main] DEBUG org.hibernate.SQL - select nextval ('hibernate_sequence')
Hibernate: select nextval ('hibernate_sequence')
2006-01-02 12:38:57,071 [main] DEBUG org.hibernate.jdbc.AbstractBatcher - preparing statement
3154 [main] DEBUG org.hibernate.jdbc.AbstractBatcher - preparing statement
2006-01-02 12:38:57,081 [main] DEBUG org.hibernate.id.SequenceGenerator - Sequence identifier generated: 1
3164 [main] DEBUG org.hibernate.id.SequenceGenerator - Sequence identifier generated: 1
2006-01-02 12:38:57,081 [main] DEBUG org.hibernate.jdbc.AbstractBatcher - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
3164 [main] DEBUG org.hibernate.jdbc.AbstractBatcher - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
2006-01-02 12:38:57,081 [main] DEBUG org.hibernate.jdbc.AbstractBatcher - closing statement
3164 [main] DEBUG org.hibernate.jdbc.AbstractBatcher - closing statement
2006-01-02 12:38:57,081 [main] DEBUG org.hibernate.event.def.AbstractSaveEventListener - generated identifier: 1, using strategy: org.hibernate.id.SequenceGenerator
3164 [main] DEBUG org.hibernate.event.def.AbstractSaveEventListener - generated identifier: 1, using strategy: org.hibernate.id.SequenceGenerator
2006-01-02 12:38:57,081 [main] DEBUG org.hibernate.event.def.AbstractSaveEventListener - saving [test.hibernate.BeanNetwork#1]
3164 [main] DEBUG org.hibernate.event.def.AbstractSaveEventListener - saving [test.hibernate.BeanNetwork#1]
2006-01-02 12:38:57,131 [main] DEBUG org.hibernate.transaction.JDBCTransaction - commit
3214 [main] DEBUG org.hibernate.transaction.JDBCTransaction - commit
2006-01-02 12:38:57,131 [main] DEBUG org.hibernate.impl.SessionImpl - automatically flushing session
3214 [main] DEBUG org.hibernate.impl.SessionImpl - automatically flushing session
2006-01-02 12:38:57,131 [main] DEBUG org.hibernate.event.def.AbstractFlushingEventListener - flushing session
3214 [main] DEBUG org.hibernate.event.def.AbstractFlushingEventListener - flushing session
2006-01-02 12:38:57,141 [main] DEBUG org.hibernate.event.def.AbstractFlushingEventListener - processing flush-time cascades
3224 [main] DEBUG org.hibernate.event.def.AbstractFlushingEventListener - processing flush-time cascades
2006-01-02 12:38:57,152 [main] DEBUG org.hibernate.event.def.AbstractFlushingEventListener - dirty checking collections
3235 [main] DEBUG org.hibernate.event.def.AbstractFlushingEventListener - dirty checking collections
2006-01-02 12:38:57,152 [main] DEBUG org.hibernate.event.def.AbstractFlushingEventListener - Flushing entities and processing referenced collections
3235 [main] DEBUG org.hibernate.event.def.AbstractFlushingEventListener - Flushing entities and processing referenced collections
2006-01-02 12:38:57,162 [main] DEBUG org.hibernate.transaction.JDBCTransaction - rollback
3245 [main] DEBUG org.hibernate.transaction.JDBCTransaction - rollback
2006-01-02 12:38:57,162 [main] DEBUG org.hibernate.transaction.JDBCTransaction - rolled back JDBC Connection
3245 [main] DEBUG org.hibernate.transaction.JDBCTransaction - rolled back JDBC Connection
2006-01-02 12:38:57,162 [main] DEBUG org.hibernate.jdbc.JDBCContext - after transaction completion
3245 [main] DEBUG org.hibernate.jdbc.JDBCContext - after transaction completion
2006-01-02 12:38:57,162 [main] DEBUG org.hibernate.jdbc.ConnectionManager - aggressively releasing JDBC connection
3245 [main] DEBUG org.hibernate.jdbc.ConnectionManager - aggressively releasing JDBC connection
2006-01-02 12:38:57,162 [main] DEBUG org.hibernate.jdbc.ConnectionManager - closing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)]
3245 [main] DEBUG org.hibernate.jdbc.ConnectionManager - closing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)]
2006-01-02 12:38:57,162 [main] DEBUG org.hibernate.connection.DriverManagerConnectionProvider - returning connection to pool, pool size: 1
3245 [main] DEBUG org.hibernate.connection.DriverManagerConnectionProvider - returning connection to pool, pool size: 1
2006-01-02 12:38:57,162 [main] DEBUG org.hibernate.impl.SessionImpl - after transaction completion
3245 [main] DEBUG org.hibernate.impl.SessionImpl - after transaction completion
2006-01-02 12:38:57,172 [main] DEBUG org.hibernate.impl.SessionImpl - closing session
3255 [main] DEBUG org.hibernate.impl.SessionImpl - closing session
2006-01-02 12:38:57,172 [main] DEBUG org.hibernate.jdbc.ConnectionManager - connection already null in cleanup : no action
3255 [main] DEBUG org.hibernate.jdbc.ConnectionManager - connection already null in cleanup : no action