Hey guys,

I am using the hbm2hbmxml tools to produce hbm.xml mapping files from my annotated entities. This has worked in the past but I am now getting a very strange error after making several changes to my entities.

Hibernate version: 3.2
Hibernate Tools version:[b] 3.2.0 beta9a

[b]Mapping documents:Annotated Mappings

Full stack trace of any exception that occurs:

BUILD FAILED
C:\myprojects\sve\build.xml:150: org.hibernate.tool.hbm2x.Export
erException: Error while processing template hbm/hibernate-mapping.hbm.ftl
at org.hibernate.tool.ant.HibernateToolTask.reportException(HibernateToo
lTask.java:223)
at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.ja
va:186)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:105)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExe
cutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.apache.tools.ant.Main.runBuild(Main.java:698)
at org.apache.tools.ant.Main.startAnt(Main.java:199)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: org.hibernate.tool.hbm2x.ExporterException: Error while processing te
mplate hbm/hibernate-mapping.hbm.ftl
at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelpe
r.java:253)
at org.hibernate.tool.hbm2x.TemplateProducer.produceToString(TemplatePro
ducer.java:67)
at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.ja
va:28)
at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.ja
va:97)
at org.hibernate.tool.hbm2x.GenericExporter.exportPOJO(GenericExporter.j
ava:146)
at org.hibernate.tool.hbm2x.GenericExporter.exportPersistentClass(Generi
cExporter.java:135)
at org.hibernate.tool.hbm2x.GenericExporter$2.process(GenericExporter.ja
va:41)
at org.hibernate.tool.hbm2x.GenericExporter.doStart(GenericExporter.java
:126)
at org.hibernate.tool.hbm2x.HibernateMappingExporter.doStart(HibernateMa
ppingExporter.java:34)
at org.hibernate.tool.hbm2x.AbstractExporter.start(AbstractExporter.java
:95)
at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:40)
at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.ja
va:183)
... 16 more
Caused by: freemarker.template.TemplateException: Error reading included file hb
m/one-to-one.hbm.ftl
at freemarker.core.Include.accept(Include.java:153)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:160)

at freemarker.core.Environment.visit(Environment.java:351)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:95)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.Environment.include(Environment.java:1378)
at freemarker.core.Include.accept(Include.java:155)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.Environment.process(Environment.java:176)
at freemarker.template.Template.process(Template.java:232)
at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelpe
r.java:247)
... 27 more
Caused by: java.io.FileNotFoundException: Template hbm/one-to-one.hbm.ftl not fo
und.
at freemarker.template.Configuration.getTemplate(Configuration.java:489)

at freemarker.core.Environment.getTemplateForInclusion(Environment.java:
1360)
at freemarker.core.Include.accept(Include.java:143)
... 44 more
--- Nested Exception ---
org.hibernate.tool.hbm2x.ExporterException: Error while processing template hbm/
hibernate-mapping.hbm.ftl
at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelpe
r.java:253)
at org.hibernate.tool.hbm2x.TemplateProducer.produceToString(TemplatePro
ducer.java:67)
at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.ja
va:28)
at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.ja
va:97)
at org.hibernate.tool.hbm2x.GenericExporter.exportPOJO(GenericExporter.j
ava:146)
at org.hibernate.tool.hbm2x.GenericExporter.exportPersistentClass(Generi
cExporter.java:135)
at org.hibernate.tool.hbm2x.GenericExporter$2.process(GenericExporter.ja
va:41)
at org.hibernate.tool.hbm2x.GenericExporter.doStart(GenericExporter.java
:126)
at org.hibernate.tool.hbm2x.HibernateMappingExporter.doStart(HibernateMa
ppingExporter.java:34)
at org.hibernate.tool.hbm2x.AbstractExporter.start(AbstractExporter.java
:95)
at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:40)
at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.ja
va:183)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:105)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExe
cutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at org.apache.tools.ant.Main.runBuild(Main.java:698)
at org.apache.tools.ant.Main.startAnt(Main.java:199)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: freemarker.template.TemplateException: Error reading included file hb
m/one-to-one.hbm.ftl
at freemarker.core.Include.accept(Include.java:153)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:160)

at freemarker.core.Environment.visit(Environment.java:351)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:95)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.Environment.include(Environment.java:1378)
at freemarker.core.Include.accept(Include.java:155)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.MixedContent.accept(MixedContent.java:92)
at freemarker.core.Environment.visit(Environment.java:196)
at freemarker.core.Environment.process(Environment.java:176)
at freemarker.template.Template.process(Template.java:232)
at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelpe
r.java:247)
... 27 more
Caused by: java.io.FileNotFoundException: Template hbm/one-to-one.hbm.ftl not fo
und.
at freemarker.template.Configuration.getTemplate(Configuration.java:489)

at freemarker.core.Environment.getTemplateForInclusion(Environment.java:
1360)
at freemarker.core.Include.accept(Include.java:143)
... 44 more


Any assistence would be greatly appreciated.

thanks
Stinky

1) the reason for the failure is that one-to-one transformation is not implemented.

2) why are you dependent on converting annotations to hbm.xml on a regular basis ?

There is at least one application: a modeler/designer could transform Hibernate3 annotated classes to Hibernate3 hbm files to be converted, in its turn, to Hibernate2 hbm file...
I applied this approach when I had to model/design entity classes by using Hibernate3 annotations before to submit the mapping files to an external software factory should use a Hibernate2-based architecture.

there a big differencees in the semantics between h2 and h3 mapping files. I don't hope you just blindly generated these files and used them in production....

Well, indeed, we had to make that work for us...
First of all, we had to create a converter from Hibernate3 to Hibernate2 hbm format.
It was not so hard due to the high similarity between these formats.
One important aspect is that DDL script was generated by using Hibernate3 mapping directly. So, some physical information hadn't to be generated.
Only two limitations we faced and solved:
- Hibernate tools wasn't able to generate component details in Hibernate3's hbm format. We had to implement this feature in our specific context.
- We had to inject unsaved-value information into the generated hbm files, because this is not present in Hibernate3 annotation schema.

what does that mean ?

There is a specific topic for that hibernatetools' limitation intitled "hbm2hbmxml doesn't export components":

http://forum.hibernate.org/viewtopic.php?t=985523&start=0&postdays=0&postorder=asc&highlight=

That still does not make any sense. hbm2hbmxml works fine with components, no extra steps are needed.

Are you sure you are talking about hbm2hbmxml ?

I struggled with this error as well for quite some time before finding this post. A huge improvement would be an error message telling the user that one-to-one is not implemented instead of the cryptic "error reading file". Would have saved me and probably other people some time...

I solved this problem by adding a more recent version of hibernate-tools to the plugin's dependencies

<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-tools</artifactId>
<version>3.2.4.GA</version>
</dependency>

This version of hibernate tools has the one-to-one mapping template.
By default version 2.2 of the hibernate3-maven-plugin uses hibernate-tools 3.2.3, you need to override that version.