[hibernate-issues] [Hibernate-JIRA] Created: (HBX-1094) IllegalArgumentException: To cannot be null in DocFileManager.getRef

[Gérald Quintana (JIRA)]

IllegalArgumentException: To cannot be null in DocFileManager.getRef
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                 Key: HBX-1094
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HBX-1094
             Project: Hibernate Tools
          Issue Type: Bug
          Components: hbm2doc
    Affects Versions: 3.2.4 Beta1
         Environment: Windows, Java 1.6.0_10, Oracle 10.2, Hibernate 3.2.6
            Reporter: Gérald Quintana


Running Hbm2Doc on a bunch of JPA annotated Entities, I get and IllegalArgumentException: To cannot be null in DocFileManager.getRef (see stack trace below). 

Some HTML files (\hbm2doc\tables\default\MY_TABLE.html) gets created before Hbm2Doc ends with this exception. There might be something in one entity code making the table.ftl FreeMarker template fail. Improving error log could help (which table has a problem?).

Stack trace
hbm2doc:
[hibernatetool] Executing Hibernate Tool with a Hibernate Annotation/EJB3 Configuration
[hibernatetool] 1. task: hbm2doc (Generates html schema documentation)
[hibernatetool] log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
[hibernatetool] log4j:WARN Please initialize the log4j system properly.
[hibernatetool] An exception occurred while running exporter #2:hbm2doc (Generates html schema documentation)
[hibernatetool] To get the full stack trace run ant with -verbose
[hibernatetool] org.hibernate.tool.hbm2x.ExporterException: Error while processing Unknown context with template doc/tables/table.ftl
[hibernatetool] freemarker.template.TemplateModelException: Method public java.lang.String org.hibernate.tool.hbm2x.doc.DocFileManager.getRef(org.hibernate.tool.hbm2x.doc.DocFile,org.hibernate.tool.hbm2x.doc.DocFile) threw an exception when invoked on org.hibernate.tool.hbm2x.doc.DocFileManager at 4310d0
[hibernatetool] java.lang.IllegalArgumentException: To cannot be null.

BUILD FAILED
org.hibernate.tool.hbm2x.ExporterException: Error while processing Unknown context with template doc/tables/table.ftl
   at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelper.java:261)
   at org.hibernate.tool.hbm2x.TemplateProducer.produceToString(TemplateProducer.java:67)
   at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.java:28)
   at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.java:97)
   at org.hibernate.tool.hbm2x.DocExporter.processTemplate(DocExporter.java:614)
   at org.hibernate.tool.hbm2x.DocExporter.generateTablesDetails(DocExporter.java:415)
   at org.hibernate.tool.hbm2x.DocExporter.doStart(DocExporter.java:154)
   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.java:186)
   at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
   (...)
   at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: freemarker.template.TemplateModelException: Method public java.lang.String org.hibernate.tool.hbm2x.doc.DocFileManager.getRef(org.hibernate.tool.hbm2x.doc.DocFile,org.hibernate.tool.hbm2x.doc.DocFile) threw an exception when invoked on org.hibernate.tool.hbm2x.doc.DocFileManager at 4310d0
   at freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:136)
   (...)
   at freemarker.template.Template.process(Template.java:232)
   at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelper.java:255)
   ... 26 more
Caused by: java.lang.IllegalArgumentException: To cannot be null.
   at org.hibernate.tool.hbm2x.doc.DocFileManager.getRef(DocFileManager.java:466)
   (...)
   at freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:616)
   at freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:113)
   ... 46 more


Ant:
   <target name="hbm2doc">
      <taskdef name="hibernatetool"
            classname="org.hibernate.tool.ant.HibernateToolTask"
            classpathref="hibernate.class.path" />
      <hibernatetool destdir="target/hibernate3/hbm2doc">
         <classpath>(...)</classpath>
         <annotationconfiguration configurationfile="hibernateConfig.xml"/>
         <hbm2doc/>
      </hibernatetool>
   </target> 

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