When i try to generate mapping files from annotated classes i get the following error :

[hibernatetool] freemarker.core.InvalidReferenceException: Expression property.getValue().getElement().referencedEntityName is undefined on line 22, column 41 in hbm/bag.hbm.ftl.
[hibernatetool] at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
[hibernatetool] at freemarker.core.Expression.getStringValue(Expression.java:118)
[hibernatetool] at freemarker.core.Expression.getStringValue(Expression.java:93)
[hibernatetool] at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.MixedContent.accept(MixedContent.java:92)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.IfBlock.accept(IfBlock.java:82)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.MixedContent.accept(MixedContent.java:92)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.Environment.include(Environment.java:1375)
[hibernatetool] at freemarker.core.Include.accept(Include.java:155)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:160)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:351)
[hibernatetool] at freemarker.core.IteratorBlock.accept(IteratorBlock.java:95)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.MixedContent.accept(MixedContent.java:92)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.Environment.include(Environment.java:1375)
[hibernatetool] at freemarker.core.Include.accept(Include.java:155)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.MixedContent.accept(MixedContent.java:92)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.Environment.process(Environment.java:176)
[hibernatetool] at freemarker.template.Template.process(Template.java:232)
[hibernatetool] at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelper.java:251)
[hibernatetool] at org.hibernate.tool.hbm2x.TemplateProducer.produceToString(TemplateProducer.java:67)
[hibernatetool] at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.java:28)
[hibernatetool] at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.java:97)
[hibernatetool] at org.hibernate.tool.hbm2x.GenericExporter.exportPOJO(GenericExporter.java:146)
[hibernatetool] at org.hibernate.tool.hbm2x.GenericExporter.exportPersistentClass(GenericExporter.java:135)
[hibernatetool] at org.hibernate.tool.hbm2x.GenericExporter$2.process(GenericExporter.java:41)
[hibernatetool] at org.hibernate.tool.hbm2x.GenericExporter.doStart(GenericExporter.java:126)
[hibernatetool] at org.hibernate.tool.hbm2x.HibernateMappingExporter.doStart(HibernateMappingExporter.java:34)
[hibernatetool] at org.hibernate.tool.hbm2x.AbstractExporter.start(AbstractExporter.java:95)
[hibernatetool] at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:40)
[hibernatetool] at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:186)
[hibernatetool] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
[hibernatetool] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[hibernatetool] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[hibernatetool] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[hibernatetool] at java.lang.reflect.Method.invoke(Method.java:585)
[hibernatetool] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
[hibernatetool] at org.apache.tools.ant.Task.perform(Task.java:348)
[hibernatetool] at org.apache.tools.ant.Target.execute(Target.java:357)
[hibernatetool] at org.apache.tools.ant.Target.performTasks(Target.java:385)
[hibernatetool] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
[hibernatetool] at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
[hibernatetool] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
[hibernatetool] at org.eclipse.ant.internal.ui.antsupport.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
[hibernatetool] at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
[hibernatetool] at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:423)
[hibernatetool] at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137)
[hibernatetool] An exception occurred while running exporter #3:hbm2hbmxml (Generates a set of hbm.xml files)
[hibernatetool] To get the full stack trace run ant with -verbose
[hibernatetool] org.hibernate.tool.hbm2x.ExporterException: Error while processing template hbm/hibernate-mapping.hbm.ftl
[hibernatetool] freemarker.core.InvalidReferenceException: Expression property.getValue().getElement().referencedEntityName is undefined on line 22, column 41 in hbm/bag.hbm.ftl.

--------------------------------
Ant Target
--------------------------------
<hibernatetool destdir="${sql.dir}">
<classpath refid="classpath"/>
<annotationconfiguration configurationfile="${basedir}/hibernate.cfg.xml" />
<hbm2ddl drop="true" create="true" export="true" outputfilename="${schema.name}" delimiter=";" format="true" />
<hbm2hbmxml destdir="${hbm.dir}" />
</hibernatetool>
--------------------------------
any help will be appreciated.

Thankx

1) you are probably using some specific mapping that the hbm.xml generation exporter does not support (yet). Try and locate which mapping is causing it and put it in jira.

2) why do you want to generate hbm.xml from annotations ?

i used 2.x hibernate version, should i generate the hbm for runtime execution ?

thx

i'm sorry - I did not understand that text/question.

I used hibernate 2.0, for this version we have to provide the hbm file in the classpath in order to use the persistence object, is it still the case with the 3.x + annotation 1.5, or the annotation is sufficient to load the objects.

i hope i'am clear ;)

Thx

hibernate 2 hbm.xml has different defaults; hibernate tools for Hibernate 3 does not generate Hibernate 2 compatible mappings..

I had the same problem as posted in: this topic
The problem is in the @CollectionOfElements annotation I use in my entity.

I want a hbm.xml file because this entity is used in a older project which uses hbm.xml files instead of annotations.

I put this issue in Jira