middlegen r.5 classdefnotfound err.

smoothop · **Joined:** Thu Aug 12, 2004 2:43 am **Posts:** 2

Hibernate version:

Mapping documents:

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

Name and version of the database you are using:

Debug level Hibernate log excerpt:

after ant in the directory of middlegen i get related hbm.xml s then i use ant hbm2java but i get error

C:\Documents and Settings\pte\Desktop\Middlegen-Hibernate-r5\build.xml:219: Caus
ed by:
Caused by:
java.lang.NoClassDefFoundError: net/sf/hibernate/MappingException
at net.sf.hibernate.tool.hbm2java.Hbm2JavaTask.processFile(Hbm2JavaTask.
java:145)
at net.sf.hibernate.tool.hbm2java.Hbm2JavaTask.execute(Hbm2JavaTask.java
:95)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:269)
at org.apache.tools.ant.Task.perform(Task.java:364)
at org.apache.tools.ant.Target.execute(Target.java:301)
at org.apache.tools.ant.Target.performTasks(Target.java:328)
at org.apache.tools.ant.Project.executeTarget(Project.java:1215)
at org.apache.tools.ant.Project.executeTargets(Project.java:1063)
at org.apache.tools.ant.Main.runBuild(Main.java:632)
at org.apache.tools.ant.Main.startAnt(Main.java:183)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:197)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:56)

at net.sf.hibernate.tool.hbm2java.Hbm2JavaTask.processFile(Hbm2JavaTask.
java:149)
at net.sf.hibernate.tool.hbm2java.Hbm2JavaTask.execute(Hbm2JavaTask.java
:95)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:269)
at org.apache.tools.ant.Task.perform(Task.java:364)
at org.apache.tools.ant.Target.execute(Target.java:301)
at org.apache.tools.ant.Target.performTasks(Target.java:328)
at org.apache.tools.ant.Project.executeTarget(Project.java:1215)
at org.apache.tools.ant.Project.executeTargets(Project.java:1063)
at org.apache.tools.ant.Main.runBuild(Main.java:632)
at org.apache.tools.ant.Main.startAnt(Main.java:183)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:197)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:56)

Total time: 3 seconds
C:\Documents and Settings\pte\Desktop\Middlegen-Hibernate-r5>

I add hibernate-tools and jdom jars to middle-gen lib dir after unzip middlegen.so they dont lead problem i guess what cause of this error?

smoothop · **Joined:** Thu Aug 12, 2004 2:43 am **Posts:** 2

but it takes time to find out

subich · **Joined:** Fri Nov 21, 2003 5:55 am **Posts:** 155

I think it's only a classpath problem in your hbm2java ant task...

sameet · **Joined:** Fri Aug 13, 2004 3:07 pm **Posts:** 44

I am getting the same error even after I put in the classpath entry for the hbm2java task. I am not using middlegen however, I am just using plain hibernate

subich · **Joined:** Fri Nov 21, 2003 5:55 am **Posts:** 155

Look carefully your build.xml line 219, what is writing on this line?
I think ant is not be able to find your hibernate.jar
Show your file build.xml

sameet · **Joined:** Fri Aug 13, 2004 3:07 pm **Posts:** 44

I think you are correct in thinking that ant is not able to find the hibernate.jar in the classpath but I get this error even after putting a classpath refid line as

Code:

. I did an echo on the reference and it shows the hibernate.jar in the classpath. So I am unable to understand why the hbm2java task is not able to find it in its classpath. Here is my piece of code from the build.xml

Code:

<!-- Teach Ant how to use Hibernate's code generation tool -->
   <taskdef name="hbm2java"
            classname="net.sf.hibernate.tool.hbm2java.Hbm2JavaTask"
            classpathref="project.class.path" />

   <!-- Generate the java code for all mapping files in our source tree -->
   <target name="codegen"
           description="Generate Java source from the O/R mapping files">
      <property name="out.path" refid="project.class.path" />
      <echo message="Classpath : \n${out.path}" />
      <hbm2java output="${source.root}">
         <fileset dir="${source.root}">
            <include name="**/*.hbm.xml" />
         </fileset>
         <classpath refid="project.class.path" />
      </hbm2java>
   </target>

subich · **Joined:** Fri Nov 21, 2003 5:55 am **Posts:** 155

And you have these lines on your build file?

<path id="project.class.path">
<fileset dir="${lib.dir}">
<include name="*.jar"/>
</fileset>
</path>

sameet · **Joined:** Fri Aug 13, 2004 3:07 pm **Posts:** 44

Here is the definition from the build.xml

Code:

   <property name="source.root" value="src" />
   <property name="class.root" value="classes" />
   <property name="lib.dir" value="lib" />
   <property name="data.dir" value="data" />

   <!-- Set up the class path for compilation and execution -->
   <path id="project.class.path">
      <!-- Include our own classes, of course -->
      <pathelement location="${class.root}" />
      <!-- Include jars in the project library directory -->
      <fileset dir="${lib.dir}">
         <include name="*.jar" />
      </fileset>
   </path>

[/code]

sameet · **Joined:** Fri Aug 13, 2004 3:07 pm **Posts:** 44

I finally figured it out. I had the hibernate-tools.jar in the locations defined by classpath ref for the taskdef

Code:

   <!-- Teach Ant how to use Hibernate's code generation tool -->
   <taskdef name="hbm2java"
            classname="net.sf.hibernate.tool.hbm2java.Hbm2JavaTask"
            classpathref="project.class.path" />

as well as in the ant \lib directory. I believe any was setting the classpath for the task as its lib dorectory since it found the class there first. Hence eveything in the classpathref was missing. I removed the jar from the ant\lib directory and the task ran fine.

sarahs · **Joined:** Fri Mar 25, 2005 1:45 pm **Posts:** 10

and where is this hibernate-tools.jar ?

sarahs · **Joined:** Fri Mar 25, 2005 1:45 pm **Posts:** 10

now that I found this jar file I was following these instructions where. I put in the same as posted earlier and also removed the jar file from ant_home/lib so it is only in the lib directory.

eclipse still prints it yellow and pretends it wouldnt find it :-( :-( :-( :-(

<path id="project.class.path">
<pathelement location="${class.root}" />
<fileset dir="${lib.dir}">
<include name="*.jar" />
</fileset>
</path>




<taskdef name="hbm2java"
classname="net.sf.hibernate.tool.hbm2java.Hbm2JavaTask"
classpathref="project.class.path" />


<target name="codegen"
description="Generate Java source from the O/R mapping files">
<property name="out.path" refid="project.class.path" />
<echo message="Classpath : \n${out.path}" />
<hbm2java output="${source.root}">
<fileset dir="${source.root}">
<include name="**/*.hbm.xml" />
</fileset>
<classpath refid="project.class.path" />
</hbm2java>
</target>

sarahs · **Joined:** Fri Mar 25, 2005 1:45 pm **Posts:** 10

Solution: org.hibernate.tool.hbm2java.classic.Hbm2JavaTask

max · **Posted:** Fri Mar 25, 2005 5:07 pm

dont use that classic.hbm2javatask....it has been removed in the latest cvs version of hibernate tools.

there is a new ant task for this stuff.