[hibernate-issues] [Hibernate-JIRA] Created: (HBX-1059) generating with generic hbmtemplate and maven 1.1

Nicolas Andres (JIRA) noreply at atlassian.com
Tue May 6 10:20:33 EDT 2008 

generating with generic hbmtemplate and maven 1.1 
--------------------------------------------------

                 Key: HBX-1059
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HBX-1059
             Project: Hibernate Tools
          Issue Type: Improvement
          Components: datagen
    Affects Versions: 3.2.beta11
         Environment: hibernate 3.2.6, maven 1.1, ant 1.6.5
            Reporter: Nicolas Andres
            Priority: Blocker


There is a problem referencing the freemarker templates when using maven 1.1. The hibernate-tools.jar and freemarker.jar have to be referenced in the POM file with the tag <classloader>root</classloader> otherwise the classes are not found when executing the hbmtemplate task. The defined classpath (<ant:classpath>....) will be loaded by a different classloader (AntClassLoader) which has the root classloader as parent classloader.  So, I do not see a way to reference the ftl templates in the ant:classpath.

Unfortunately, the freemarker templates can only be referenced relative to the classpath and not as absolute file names. Because maven does not support to load resources on the root classpath (unlike jars) it is not possible to use hibernate tools as shown below. 

from project.xml:
<dependency>
	<groupId>lgpl</groupId>
	<artifactId>hibernate-tools</artifactId>
	<version>3.2.0b11</version>
	<type>jar</type>
	<properties>
	    <classloader>root</classloader> 
		<ejb.manifest.classpath>false</ejb.manifest.classpath>
	</properties>
</dependency>

from maven.mxl:
<ant:taskdef name="hibernatetool" 
	classname="org.hibernate.tool.ant.HibernateToolTask" 
/>

<ant:hibernatetool destdir="${hibernate.gen.destdir}">
	<ant:configuration configurationfile="${hibernate.cfg}" />
	<ant:hbmtemplate template="hibernateDao.ftl" filepattern="{package-name}/{class-name}HibernateDao.java" />
	<ant:classpath>
		<ant:pathelement path="${basedir}/../src/main/resources"/>	
	</ant:classpath>
</ant:hibernatetool>

console:
Exception stack traces :
org.apache.maven.werkz.UnattainableGoalException: Unable to obtain goal [generate]
	at org.apache.maven.werkz.Goal.fire(Goal.java:698)
	at org.apache.maven.werkz.Goal.attain(Goal.java:623)
	at org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:712)
	at org.apache.maven.MavenSession.attainGoals(MavenSession.java:265)
	at org.apache.maven.cli.App.doMain(App.java:307)
	at org.apache.maven.cli.App.main(App.java:217)
	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 com.werken.forehead.Forehead.run(Forehead.java:551)
	at com.werken.forehead.Forehead.main(Forehead.java:581)
Caused by: org.apache.commons.jelly.JellyTagException: file:/C:/Documents and Settings/s74342/IBM/rationalsdp7.0/workspace/eum-ejb/maven/maven.xml:57:56: <ant:hibernatetool> org.hibernate.tool.hbm2x.ExporterException: Error while processing template hibernateDao.ftl
	at org.apache.commons.jelly.impl.TagScript.handleException(TagScript.java:681)
	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:262)
	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
	at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:83)
	at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:116)
	at org.apache.maven.werkz.Goal.fire(Goal.java:691)
	at org.apache.maven.werkz.Goal.attain(Goal.java:623)
	at org.apache.maven.werkz.WerkzProject.attainGoal(WerkzProject.java:209)
	at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:115)
	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:250)
	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
	at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:83)
	at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:116)
	at org.apache.maven.werkz.Goal.fire(Goal.java:691)
	... 11 more
Caused by: org.hibernate.tool.hbm2x.ExporterException: Error while processing template hibernateDao.ftl
	at org.hibernate.tool.ant.HibernateToolTask.reportException(HibernateToolTask.java:226)
	at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:189)
	at org.apache.tools.ant.Task.perform(Task.java:364)
	at org.apache.commons.jelly.tags.ant.AntTag.doTag(AntTag.java:195)
	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:250)
	... 23 more
Caused by: org.hibernate.tool.hbm2x.ExporterException: Error while processing template hibernateDao.ftl
	at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelper.java:254)
	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.GenericExporter.exportPOJO(GenericExporter.java:146)
	at org.hibernate.tool.hbm2x.GenericExporter.exportPersistentClass(GenericExporter.java:135)
	at org.hibernate.tool.hbm2x.GenericExporter$2.process(GenericExporter.java:41)
	at org.hibernate.tool.hbm2x.GenericExporter.doStart(GenericExporter.java:126)
	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)
	... 26 more
Caused by: java.io.FileNotFoundException: Template hibernateDao.ftl not found.
	at freemarker.template.Configuration.getTemplate(Configuration.java:489)
	at freemarker.template.Configuration.getTemplate(Configuration.java:452)
	at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelper.java:250)
	... 36 more





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