Hibernate version: 3.2.0CR3

I am trying to define filters in a central location and refer to them in several classes. The way i mapped below generating compilation errors.

filters.hbm.xml
=============
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.model">

<filter-def name="hrAdminVisibility" condition="
<MY CONDITION HERE>">
<filter-param type="long" name="rule"/>
</filter-def>

<filter-def name="hierarchicalVisibility" condition="
<MY CONDITION HERE>">
<filter-param type="long" name="hierarchicalGroup"/>
</filter-def>
</hibernate-mapping>
=========================

and refer to these filters in the actual classes like below..

MyClass.hbm.xml
============
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.model.search">

<class name="FeedbackReportsEmployeeSearch" table="VW_CPD_FDBK_EMP_SEARCH_CUSTOM" mutable="false">

<id name="key" type="long">
<column name="EMPLOYEE_SEQNUM" sql-type="number"/>
</id>

<property name="externalEmployeeId" type="string" column="EXT_SYS_EMP_ID"/>
<property name="employeeStatus" type="string" column="EMP_STATUS_ID"/>
<property name="lastName" type="string" column="LAST_NAME"/>
<property name="firstName" type="string" column="FIRST_NAME"/>
<property name="hireDate" type="date" column="HIRE_DATE"/>
<property name="ftptCode" type="string" column="FTPT_CODE"/>


<!-- Filters down all selected persons by their assigned visibility rule. -->
<filter name="hrAdminVisibility"/>
<filter name="hierarchicalVisibility"/>
</class>

</hibernate-mapping>
============================

The errors:
=======
[java] [INFO] ------------------------------------------------------------------------
[java] [ERROR] FATAL ERROR
[java] [INFO] ------------------------------------------------------------------------
[java] [INFO] null
[java] [INFO] ------------------------------------------------------------------------
[java] [INFO] Trace
[java] java.lang.NullPointerException
[java] at org.hibernate.cfg.HbmBinder.parseFilter(HbmBinder.java:2935)
[java] at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2110)
[java] at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2031)
[java] at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:359)
[java] at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:273)
[java] at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:144)
[java] at org.hibernate.cfg.Configuration.add(Configuration.java:424)
[java] at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:437)
[java] at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:268)
[java] at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1039)
[java] at org.codehaus.mojo.hibernate3.configuration.AbstractComponentConfiguration.getConfiguration(AbstractComponentConfiguration.java:38)
[java] at org.codehaus.mojo.hibernate3.HibernateExporterMojo.configureExporter(HibernateExporterMojo.java:186)
[java] at org.codehaus.mojo.hibernate3.exporter.Hbm2JavaGeneratorMojo.configureExporter(Hbm2JavaGeneratorMojo.java:69)
[java] at org.codehaus.mojo.hibernate3.HibernateExporterMojo.doExecute(HibernateExporterMojo.java:241)
[java] at org.codehaus.mojo.hibernate3.HibernateExporterMojo.execute(HibernateExporterMojo.java:140)
[java] at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:443)
[java] at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:539)
[java] at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:480)
[java] at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:459)
[java] at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:311)
[java] at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:278)
[java] at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:143)
[java] at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:334)
[java] at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:125)
[java] at org.apache.maven.cli.MavenCli.main(MavenCli.java:280)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[java] at java.lang.reflect.Method.invoke(Method.java:597)
[java] at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
[java] at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
[java] at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
[java] at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
[java] [INFO] ------------------------------------------------------------------------

Is this possible at all?

Does anybody know the answer, or the question is not clear to people?