Hi
I am trying to generate dao's using hbm2dao ant task. I have modified dao generation template little bit by referring some of the posts in this forum.
My problem is while generating dao's ant is showing the following error.
[hibernatetool] 2. task: hbm2java (Generates a set of .java files)
[hibernatetool] 3. task: generic exportertemplate: my-dao-template.ftl
[hibernatetool] (freemarker.runtime 96 )
[hibernatetool] Expression clazz.hasNaturalId is undefined on line 164, column 6 in my-dao-template.ftl.
[hibernatetool] The problematic instruction:
[hibernatetool] ----------
[hibernatetool] ==> if clazz.hasNaturalId() [on line 164, column 1 in my-dao-template.ftl]
[hibernatetool] ----------
[hibernatetool] Java backtrace for programmers:
[hibernatetool] ----------
[hibernatetool] freemarker.core.InvalidReferenceException: Expression clazz.hasNaturalId is undefined on line 164, column 6 in my-dao-template.ftl.
[hibernatetool] at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
[hibernatetool] at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:134)
[hibernatetool] at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:114)
[hibernatetool] at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
[hibernatetool] at freemarker.core.Expression.isTrue(Expression.java:138)
[hibernatetool] at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:77)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.MixedContent.accept(MixedContent.java:92)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.IfBlock.accept(IfBlock.java:82)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.MixedContent.accept(MixedContent.java:92)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:233)
[hibernatetool] at freemarker.core.BlockAssignment.accept(BlockAssignment.java:83)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.MixedContent.accept(MixedContent.java:92)
[hibernatetool] at freemarker.core.Environment.visit(Environment.java:196)
[hibernatetool] at freemarker.core.Environment.process(Environment.java:176)
[hibernatetool] at freemarker.template.Template.process(Template.java:232)
[hibernatetool] at org.hibernate.tool.hbm2x.TemplateHelper.processTemplate(TemplateHelper.java:251)
[hibernatetool] at org.hibernate.tool.hbm2x.TemplateProducer.produceToString(TemplateProducer.java:67)
[hibernatetool] at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.java:28)
[hibernatetool] at org.hibernate.tool.hbm2x.TemplateProducer.produce(TemplateProducer.java:97)
[hibernatetool] at org.hibernate.tool.hbm2x.GenericExporter.exportPOJO(GenericExporter.java:146)
[hibernatetool] at org.hibernate.tool.hbm2x.GenericExporter.exportComponent(GenericExporter.java:131)
[hibernatetool] at org.hibernate.tool.hbm2x.GenericExporter$3.process(GenericExporter.java:61)
[hibernatetool] at org.hibernate.tool.hbm2x.GenericExporter.doStart(GenericExporter.java:126)
[hibernatetool] at org.hibernate.tool.hbm2x.AbstractExporter.start(AbstractExporter.java:95)
[hibernatetool] at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:40)
[hibernatetool] at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:186)
[hibernatetool] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
[hibernatetool] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[hibernatetool] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[hibernatetool] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[hibernatetool] at java.lang.reflect.Method.invoke(Method.java:585)
[hibernatetool] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
[hibernatetool] at org.apache.tools.ant.Task.perform(Task.java:348)
[hibernatetool] at org.apache.tools.ant.Target.execute(Target.java:357)
[hibernatetool] at org.apache.tools.ant.Target.performTasks(Target.java:385)
[hibernatetool] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
[hibernatetool] at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
[hibernatetool] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
[hibernatetool] at org.eclipse.ant.internal.ui.antsupport.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
[hibernatetool] at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
[hibernatetool] at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:423)
[hibernatetool] at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137)
[hibernatetool] An exception occurred while running exporter #4:generic exportertemplate: my-dao-template.ftl
[hibernatetool] To get the full stack trace run ant with -verbose
[hibernatetool] org.hibernate.tool.hbm2x.ExporterException: Error while processing template my-dao-template.ftl
[hibernatetool] freemarker.core.InvalidReferenceException: Expression clazz.hasNaturalId is undefined on line 164, column 6 in my-dao-template.ftl.
BUILD FAILED
C:\ecs2008\htest\build.xml:61: org.hibernate.tool.hbm2x.ExporterException: Error while processing template my-dao-template.ftl
Here is the template:::::::::::::::::
${pojo.getPackageDeclaration()}
// Generated ${date} by Hibernate Tools ${version}
<#assign classbody>
<#assign declarationName = pojo.importType(pojo.getDeclarationName())>/**
* Home object for domain model class ${declarationName}.
* @see ${pojo.getQualifiedDeclarationName()}
* @author Hibernate Tools
*/
<#if ejb3>
@${pojo.importType("javax.ejb.Stateless")}
</#if>
public class ${declarationName}Home {
private static final ${pojo.importType("org.apache.commons.logging.Log")} log = ${pojo.importType("org.apache.commons.logging.LogFactory")}.getLog(${pojo.getDeclarationName()}Home.class);
<#if ejb3>
@${pojo.importType("javax.persistence.PersistenceContext")} private ${pojo.importType("javax.persistence.EntityManager")} entityManager;
public void persist(${declarationName} transientInstance) {
log.debug("persisting ${declarationName} instance");
try {
entityManager.persist(transientInstance);
log.debug("persist successful");
}
catch (RuntimeException re) {
log.error("persist failed", re);
throw re;
}
}
public void remove(${declarationName} persistentInstance) {
log.debug("removing ${declarationName} instance");
try {
entityManager.remove(persistentInstance);
log.debug("remove successful");
}
catch (RuntimeException re) {
log.error("remove failed", re);
throw re;
}
}
public ${declarationName} merge(${declarationName} detachedInstance) {
log.debug("merging ${declarationName} instance");
try {
${declarationName} result = entityManager.merge(detachedInstance);
log.debug("merge successful");
return result;
}
catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
<#if clazz.identifierProperty?has_content>
public ${declarationName} findById( ${pojo.getJavaTypeName(clazz.identifierProperty, jdk5)} id) {
log.debug("getting ${declarationName} instance with id: " + id);
try {
${declarationName} instance = entityManager.find(${pojo.getDeclarationName()}.class, id);
log.debug("get successful");
return instance;
}
catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
</#if>
<#else>
private final ${pojo.importType("org.hibernate.SessionFactory")} sessionFactory;
/**
* Dependency injection constructor
*/
public ${declarationName}Home(final ${pojo.importType("org.hibernate.SessionFactory")} sessionFactory){
super();
this.sessionFactory = sessionFactory;
}
public void persist(${declarationName} transientInstance) {
log.debug("persisting ${declarationName} instance");
try {
sessionFactory.getCurrentSession().persist(transientInstance);
log.debug("persist successful");
}
catch (RuntimeException re) {
log.error("persist failed", re);
throw re;
}
}
public void attachDirty(${declarationName} instance) {
log.debug("attaching dirty ${declarationName} instance");
try {
sessionFactory.getCurrentSession().saveOrUpdate(instance);
log.debug("attach successful");
}
catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
public void attachClean(${declarationName} instance) {
log.debug("attaching clean ${declarationName} instance");
try {
sessionFactory.getCurrentSession().lock(instance, ${pojo.importType("org.hibernate.LockMode")}.NONE);
log.debug("attach successful");
}
catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
public void delete(${declarationName} persistentInstance) {
log.debug("deleting ${declarationName} instance");
try {
sessionFactory.getCurrentSession().delete(persistentInstance);
log.debug("delete successful");
}
catch (RuntimeException re) {
log.error("delete failed", re);
throw re;
}
}
public ${declarationName} merge(${declarationName} detachedInstance) {
log.debug("merging ${declarationName} instance");
try {
${declarationName} result = (${declarationName}) sessionFactory.getCurrentSession()
.merge(detachedInstance);
log.debug("merge successful");
return result;
}
catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
<#if clazz.identifierProperty?has_content>
public ${declarationName} findById( ${c2j.getJavaTypeName(clazz.identifierProperty, jdk5)} id) {
log.debug("getting ${declarationName} instance with id: " + id);
try {
${declarationName} instance = (${declarationName}) sessionFactory.getCurrentSession()
.get("${clazz.entityName}", id);
if (instance==null) {
log.debug("get successful, no instance found");
}
else {
log.debug("get successful, instance found");
}
return instance;
}
catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
</#if>
<#if clazz.hasNaturalId()>
public ${declarationName} findByNaturalId(${c2j.asNaturalIdParameterList(clazz)}) {
log.debug("getting ${declarationName} instance by natural id");
try {
${declarationName} instance = (${declarationName}) sessionFactory.getCurrentSession()
.createCriteria("${clazz.entityName}")
<#if jdk5>
.add( ${pojo.staticImport("org.hibernate.criterion.Restrictions", "naturalId")}()
<#else>
.add( ${pojo.importType("org.hibernate.criterion.Restrictions")}.naturalId()
</#if>
<#foreach property in pojo.getAllPropertiesIterator()>
<#if property.isNaturalIdentifier()>
.set("${property.name}", ${property.name})
</#if>
</#foreach>
)
.uniqueResult();
if (instance==null) {
log.debug("get successful, no instance found");
}
else {
log.debug("get successful, instance found");
}
return instance;
}
catch (RuntimeException re) {
log.error("query failed", re);
throw re;
}
}
</#if>
<#if jdk5>
public ${pojo.importType("java.util.List")}<${declarationName}> findByExample(${declarationName} instance) {
<#else>
public ${pojo.importType("java.util.List")} findByExample(${declarationName} instance) {
</#if>
log.debug("finding ${declarationName} instance by example");
try {
<#if jdk5>
${pojo.importType("java.util.List")}<${declarationName}> results = (List<${declarationName}>) sessionFactory.getCurrentSession()
<#else>
${pojo.importType("java.util.List")} results = sessionFactory.getCurrentSession()
</#if>
.createCriteria("${clazz.entityName}")
<#if jdk5>
.add( ${pojo.staticImport("org.hibernate.criterion.Example", "create")}(instance) )
<#else>
.add(${pojo.importType("org.hibernate.criterion.Example")}.create(instance))
</#if>
.list();
log.debug("find by example successful, result size: " + results.size());
return results;
}
catch (RuntimeException re) {
log.error("find by example failed", re);
throw re;
}
}
<#foreach queryName in cfg.namedQueries.keySet()>
<#if queryName.startsWith(clazz.entityName + ".")>
<#assign methname = c2j.unqualify(queryName)>
<#assign params = cfg.namedQueries.get(queryName).parameterTypes><#assign argList = c2j.asFinderArgumentList(params, pojo)>
<#if jdk5 && methname.startsWith("find")>
public ${pojo.importType("java.util.List")}<${declarationName}> ${methname}(${argList}) {
<#elseif methname.startsWith("count")>
public int ${methname}(${argList}) {
<#else>
public ${pojo.importType("java.util.List")} ${methname}(${argList}) {
</#if>
${pojo.importType("org.hibernate.Query")} query = sessionFactory.getCurrentSession()
.getNamedQuery("${queryName}");
<#foreach param in params.keySet()>
<#if param.equals("maxResults")>
query.setMaxResults(maxResults);
<#elseif param.equals("firstResult")>
query.setFirstResult(firstResult);
<#else>
query.setParameter("${param}", ${param});
</#if>
</#foreach>
<#if jdk5 && methname.startsWith("find")>
return (List<${declarationName}>) query.list();
<#elseif methname.startsWith("count")>
return ( (Integer) query.uniqueResult() ).intValue();
<#else>
return query.list();
</#if>
}
</#if>
</#foreach></#if>
}
</#assign>
${pojo.generateImports()}
${classbody}
Here are the classes and generated hbm files by hbm2java and jdbcconfiguration.
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Jan 15, 2008 10:00:09 AM by Hibernate Tools 3.2.0.CR1 -->
<hibernate-mapping>
<class name="persistance.Flights" table="flights" catalog="hibernate">
<id name="flightId" type="int">
<column name="flight_id" />
<generator class="assigned" />
</id>
<property name="name" type="string">
<column name="name" length="32" not-null="true" />
</property>
<property name="departureUtc" type="timestamp">
<column name="departure_utc" length="0" not-null="true" />
</property>
<property name="arrivalUtc" type="timestamp">
<column name="arrival_utc" length="0" not-null="true" />
</property>
<set name="reservationses" inverse="true">
<key>
<column name="flight_id_fk" not-null="true" />
</key>
<one-to-many class="persistance.Reservations" />
</set>
</class>
</hibernate-mapping>
Ant target:
<target name="generateall" depends="clean">
<taskdef name="hibernatetool" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="lib.class.path"/>
<hibernatetool destdir="${src.dir}" >
<jdbcconfiguration configurationfile="${src.dir}/hibernate.cfg.xml" packagename="persistance"/>
<hbm2hbmxml destdir="${build.gen-src.dir}/persistance"/>
<hbm2java jdk5="true"/>
<property key="ejb3" value="false"/>
<property key="jdk5" value="true"/>
<hbmtemplate templatepath="${src.dir}/template" template="my-dao-template.ftl"
filepattern="{package-name}/{class-name}Home.java"/>
</hibernatetool>
</target>
hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/hibernate</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">*****</property>
</session-factory>
</hibernate-configuration>
Even though it is generating FilghtsHome.java why ant is throwing that error?
Here is the generated java file
package persistance;
// Generated Jan 15, 2008 10:00:11 AM by Hibernate Tools 3.2.0.CR1
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.SessionFactory;
import static org.hibernate.criterion.Example.create;
/**
* Home object for domain model class Flights.
* @see persistance.Flights
* @author Hibernate Tools
*/
public class FlightsHome {
private static final Log log = LogFactory.getLog(FlightsHome.class);
private final SessionFactory sessionFactory;
/**
* Dependency injection constructor
*/
public FlightsHome(final SessionFactory sessionFactory){
super();
this.sessionFactory = sessionFactory;
}
public void persist(Flights transientInstance) {
log.debug("persisting Flights instance");
try {
sessionFactory.getCurrentSession().persist(transientInstance);
log.debug("persist successful");
}
catch (RuntimeException re) {
log.error("persist failed", re);
throw re;
}
}
public void attachDirty(Flights instance) {
log.debug("attaching dirty Flights instance");
try {
sessionFactory.getCurrentSession().saveOrUpdate(instance);
log.debug("attach successful");
}
catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
public void attachClean(Flights instance) {
log.debug("attaching clean Flights instance");
try {
sessionFactory.getCurrentSession().lock(instance, LockMode.NONE);
log.debug("attach successful");
}
catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
public void delete(Flights persistentInstance) {
log.debug("deleting Flights instance");
try {
sessionFactory.getCurrentSession().delete(persistentInstance);
log.debug("delete successful");
}
catch (RuntimeException re) {
log.error("delete failed", re);
throw re;
}
}
public Flights merge(Flights detachedInstance) {
log.debug("merging Flights instance");
try {
Flights result = (Flights) sessionFactory.getCurrentSession()
.merge(detachedInstance);
log.debug("merge successful");
return result;
}
catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
public Flights findById( int id) {
log.debug("getting Flights instance with id: " + id);
try {
Flights instance = (Flights) sessionFactory.getCurrentSession()
.get("persistance.Flights", id);
if (instance==null) {
log.debug("get successful, no instance found");
}
else {
log.debug("get successful, instance found");
}
return instance;
}
catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
public List<Flights> findByExample(Flights instance) {
log.debug("finding Flights instance by example");
try {
List<Flights> results = (List<Flights>) sessionFactory.getCurrentSession()
.createCriteria("persistance.Flights")
.add( create(instance) )
.list();
log.debug("find by example successful, result size: " + results.size());
return results;
}
catch (RuntimeException re) {
log.error("find by example failed", re);
throw re;
}
}
}
Thanks in advance....
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