Here is my build.xml file. It can generate a 'classes' folder with the .class and .hbm.xml file in it but the schema export still cannot find the persistent class. I have read all the posts on classpath and now I'm getting a little irritated on why my build.xml file won't run Schema Export. As of right now my build file if I have sql code manually on a txt file, it can create the tables if i do "ant create-tables" . However I still need to get my Schema-Export tool working to create the sql script to even create the tables.

Here is my build.xml file:

<?xml version="1.0"?>

<project name="test" default="compile" basedir=".">
<!-- Set up properties containing important project directories -->
<property name="source.root" value="src"/>
<property name="class.root" value="classes"/>
<property name="lib.dir" value="lib"/>

<property name="data.dir" value="data"/>
<property name="src.java.dir" location="${source.root}/java"/>

<property name="blah" value="airline"/>
<property name="database.userid" value="root"/>
<property name="database.password" value="password"/>
<property name="database.url" value="jdbc:mysql://localhost/test"/>
<property name="database.driver" value="com.mysql.jdbc.Driver"/>
<property name="database.driver.file" value="${lib.dir}/mysql-connector-java-3.0.14-production-bin.jar"/>
<property name="database.driver.classpath" value="${database.driver.file}"/>
<property name="database.schema" value=""/>
<property name="database.catalog" value=""/>
<property name="database.script.file" value="${source.root}/sql/${blah}-mysql.sql"/>

<property environment="env" />


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

<pathelement location="${env.CLASSPATH}"/>
</path>




<!-- 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">
<hbm2java output="${source.root}">
<fileset dir="${source.root}">
<include name="**/*.hbm.xml"/>
</fileset>
</hbm2java>
</target>


<!-- Create our runtime subdirectories and copy resources into them -->
<target name="prepare" description="Sets up build structures">
<mkdir dir="${class.root}"/>

<!-- Copy our property files and O/R mappings for use at runtime -->
<copy todir="${class.root}" >
<fileset dir="${source.root}" >
<include name="**/*.properties"/>
<include name="**/*.hbm.xml"/>
</fileset>
</copy>
</target>

<!-- Compile the java source of the project -->
<target name="compile" depends="prepare"
description="Compiles all Java classes">
<javac srcdir="${source.root}"
destdir="${class.root}"
debug="on"
optimize="off"
deprecation="on"
classpathref="project.class.path">
<classpath>
<path refid="project.class.path"/>
<pathelement location="${class.root}"/>
</classpath>
</javac>
</target>


<target
name="create-tables"
description="Create tables"
>
<echo>Creating tables using URL ${database.url}</echo>
<sql
classpath="${database.driver.classpath}"
driver="${database.driver}"
url="${database.url}"
userid="${database.userid}"
password="${database.password}"
src="${database.script.file}"
/>
</target>

<target name="schema" depends="compile"
description="Generate DB schema from the O/R mapping files">
<!-- Teach Ant how to use Hibernate's schema generation tool -->
<taskdef name="schemaexport"
classname="net.sf.hibernate.tool.hbm2ddl.SchemaExportTask">
<classpath>
<path refid="project.class.path"/>
<pathelement location="${class.root}"/>
</classpath>
</taskdef>
<schemaexport properties="${class.root}/hibernate.properties"
quiet="no" text="no" drop="no" delimiter=";" output="schema-export.sql">
<fileset dir="${class.root}">
<include name="**/*.hbm.xml"/>
</fileset>
</schemaexport>
</target>


</project>



I get the error:

MappingExceptionError: no persistent class found.

Why is that? When I run 'codegen' it will create a java file based off it's respective hbm.xml file. However when I run 'schema' I get that error.
What could be the soln or any suggestions?

I am having the same problem.

Here is my definition for the SchemaExportTask.



I've tried the following, with no success.

1. Including the compiled classes in the classpath definition within the taskdef.
2. Added a "path" element defining "project.class.path" within my properties settings, then using that value in the taskdef under attribute "classpathref".

Here is the actual error:



The ExceptionLog class is definitely there, as is it's cute little .hbm.xml file.

Any help would be appreciated.

Lukas

This is a cross-post, please forgive.

Okay, I finally got it to work, and I think the reason it wasn't working is pretty crappy.

My task was defined as such. Before, I was trying to define classpaths within the task using filesets, but nothing worked. So, because everyone else was doing it, I switched to using the "classpathred" attribute in the taskdef element.



Before, when things were not working, my path definition looked like this. It found the jar files wonderfully, but not the classes or the properties file.



When a "pathelement" variable was added to the path, everything works dandy now.



And I feel strangely... unsatisfied.

Lukas