[jboss-user] [JBoss Tools] - HibernateException: Dialect class not found in HBM2DDL ant task

[Saemmy -]

Saemmy - [https://community.jboss.org/people/saemmy2011] created the discussion

"HibernateException: Dialect class not found in HBM2DDL ant task"

To view the discussion, visit: https://community.jboss.org/message/763934#763934

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Hi,

I am using <hbm2ddl> ant task for exporting DDL schema. My ant script worked fine for Hibernate 3.6 and Hibernate Tools 3.x.

After upgading to Hibernate 4 and Hibernate Tools 4 I get the following exception:

[hibernatetool] 2012-10-09 15:54:32,327 INFO  [Version.<clinit>(15)] : Hibernate Tools 4.0.0
[hibernatetool] 2012-10-09 15:54:32,390 WARN  [ConnectionProviderInitiator.initiateService(143)] : HHH000181: No appropriate connection provider encountered, assuming application will be supplying connections
[hibernatetool] An exception occurred while running exporter #2:hbm2ddl (Generates database schema)
[hibernatetool] To get the full stack trace run ant with -verbose
[hibernatetool] org.hibernate.HibernateException: Dialect class not found: com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect
[hibernatetool] org.hibernate.service.classloading.spi.ClassLoadingException: Unable to load class [com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect]
[hibernatetool] java.lang.ClassNotFoundException: Could not load requested class : com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect
[hibernatetool] A class were not found in the classpath of the Ant task.
[hibernatetool] Ensure that the classpath contains the classes needed for Hibernate and your code are in the classpath.

BUILD FAILED
C:\Projekte\MyProduct\workspace-sts-trunk\MyProductWeb-dev\build.xml:143: org.hibernate.HibernateException: Dialect class not found: com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect
    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.UnknownElement.execute(UnknownElement.java:291)
    at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:392)
    at org.apache.tools.ant.Target.performTasks(Target.java:413)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    at org.eclipse.ant.internal.launching.remote.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
    at org.eclipse.ant.internal.launching.remote.InternalAntRunner.run(InternalAntRunner.java:424)
    at org.eclipse.ant.internal.launching.remote.InternalAntRunner.main(InternalAntRunner.java:138)
Caused by: org.hibernate.HibernateException: Dialect class not found: com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect
    at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:76)
    at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64)
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:174)
    at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
    at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:113)
    at org.hibernate.tool.hbm2x.Hbm2DDLExporter.doStart(Hbm2DDLExporter.java:164)
    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)
    ... 15 more
Caused by: org.hibernate.service.classloading.spi.ClassLoadingException: Unable to load class [com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect]
    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:141)
    at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:73)
    ... 25 more
Caused by: java.lang.ClassNotFoundException: Could not load requested class : com.mycompany.myproduct.integration.dao.hibernate.Oracle10nDialect
    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl$1.findClass(ClassLoaderServiceImpl.java:99)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at org.hibernate.service.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:138)
    ... 26 more

*Here is the part of my ant script:*

<target name="schemaexport" depends="clean, compile">
        <taskdef name="hibernatetool" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="build.classpath" />
        <mkdir dir="${target.dir}/sql"/>

        <hibernatetool destdir="${target.dir}/sql">
            <classpath>
                <path location="${build.dir}"/>
            </classpath>
            <configuration configurationfile="${build.dir}/hibernate.cfg.xml"/>
            <hbm2ddl
                export="false"
                drop="true"
                outputfilename="DB-create.sql"
                delimiter=";"
                format="true"
            />
        </hibernatetool>
    </target>

The build.dir includes all class files, including the Oracle 10 dialect.
Did something change in the configuration of hbm2dll in Hibernate Tools 4? Or is this a bug in Hibernate Tools 4?
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