[hibernate-issues] [Hibernate-JIRA] Closed: (HHH-128) NullPointerException when using a 'one-to-many bag' in a 'component' inside a 'dynamic-component'

[Steve Ebersole (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-128?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Ebersole closed HHH-128.
------------------------------


Closing stale resolved issues

> NullPointerException when using a 'one-to-many bag' in a 'component' inside a 'dynamic-component'
> -------------------------------------------------------------------------------------------------
>
>                 Key: HHH-128
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-128
>             Project: Hibernate Core
>          Issue Type: Patch
>          Components: core
>    Affects Versions: 3.0 beta 4
>         Environment: Hibernate 3.0 beta 3, HSQLDB, Java 1.4
>            Reporter: Daniel Seiler
>            Assignee: Gavin King
>            Priority: Minor
>             Fix For: 3.0 beta 4
>
>         Attachments: dynamiccomponent-test.zip, dynamiccomponent-test2.zip
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> Problem:
> When I call the method Configuration.addXML(...) with the mapping file showed below I get a NullPointerException (see Stack Trace). The Exception seams only to occur if I try to model a one to many relationship inside a component which is par of a dynamic component.
> Possible Solution:
> I figured out that if I change the code in the method
> bindComponent(...) of the class org.hibernate.cfg.HbmBinder.java
> from:
> ...
> else if ( classNode != null ) {
>   component.setComponentClassName( getClassName( classNode, mappings ) );
> }
> ...
> to:
> ...
> else if ( classNode != null ) {
>   parentClass = getClassName( classNode, mappings );
>   component.setComponentClassName( parentClass );
> }
> ...
> Since the NullPointer was caused by the parentClass that was null. I don't know if my fix is the proper solution to the problem but I tried it out and it worked. Please have a look.
> thanks
> Daniel
> Mapping File:
> <?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 default-lazy="false">
> <class name="ch.truesolutions.hibernate.Artifact" table="ZOO1" entity-name="ZOO1">
> <id name="id" type="long" unsaved-value="0" >
> <generator class="native"/>
> </id>
> <dynamic-component name="groupLists">
> <component name="address" class="ch.truesolutions.hibernate.GroupList">
> <bag name="groups"
> cascade="save-update"
> lazy="false">
> <key column="ZOO1_ID"/>
> <one-to-many entity-name="ADDRESS1"/>
> </bag>
> </component>
> </dynamic-component>
> </class>
> <class name="ch.truesolutions.hibernate.Group" entity-name="ADDRESS1" table="ADDRESS1" >
> <id name="id" type="long" unsaved-value="0" >
> <generator class="native"/>
> </id>
> ...
> </class>
> </hibernate-mapping>
> Full stack trace of any exception that occurs:
> ERROR [main] (Configuration.java:304) - Could not configure datastore from XML
> java.lang.NullPointerException
> at org.hibernate.util.StringHelper.qualify(StringHelper.java:201)
> at org.hibernate.cfg.HbmBinder.bindCollection(HbmBinder.java:914)
> at org.hibernate.cfg.HbmBinder$4.create(HbmBinder.java:2193)
> at org.hibernate.cfg.HbmBinder.bindComponent(HbmBinder.java:1287)
> at org.hibernate.cfg.HbmBinder.bindComponent(HbmBinder.java:1315)
> at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:1490)
> at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:589)
> at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:1848)
> at org.hibernate.cfg.Configuration.add(Configuration.java:344)
> at org.hibernate.cfg.Configuration.addXML(Configuration.java:301)
> at ch.truesolutions.hibernate.HibernateHelper.<init>(HibernateHelper.java:65)
> at ch.truesolutions.hibernate.HibernateHelper.getInstance(HibernateHelper.java:56)
> at ch.truesolutions.hibernate.TestHibernate.main(TestHibernate.java:39)
> ERROR [main] (HibernateHelper.java:77) - Building SessionFactory failed.
> org.hibernate.MappingException: java.lang.NullPointerException
> at org.hibernate.cfg.Configuration.addXML(Configuration.java:305)
> at ch.truesolutions.hibernate.HibernateHelper.<init>(HibernateHelper.java:65)
> at ch.truesolutions.hibernate.HibernateHelper.getInstance(HibernateHelper.java:56)
> at ch.truesolutions.hibernate.TestHibernate.main(TestHibernate.java:39)
> Caused by: java.lang.NullPointerException
> at org.hibernate.util.StringHelper.qualify(StringHelper.java:201)
> at org.hibernate.cfg.HbmBinder.bindCollection(HbmBinder.java:914)
> at org.hibernate.cfg.HbmBinder$4.create(HbmBinder.java:2193)
> at org.hibernate.cfg.HbmBinder.bindComponent(HbmBinder.java:1287)
> at org.hibernate.cfg.HbmBinder.bindComponent(HbmBinder.java:1315)
> at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:1490)
> at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:589)
> at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:1848)
> at org.hibernate.cfg.Configuration.add(Configuration.java:344)
> at org.hibernate.cfg.Configuration.addXML(Configuration.java:301)

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