I've set up a mapping file with a lazy date property (see below). When I try to execute a query that should return objects of this type, however, I get a ClassCastException (see below).
The problem appears to be somewhere around MutableType.java:23:
Code:
return (value==null) ? null : deepCopyNotNull(value);
...which looks like it will call deepCopyNotNull even if the value is a LazyPropertyInitializer. This seems to be fine for ImmutableTypes, but for a MutableType (such as DateType), it ends up trying to cast the LazyPropertyInitializer to a Date (see DateType.java:73):
Code:
return new Date( ( (java.util.Date) value ).getTime() );
Naturally this fails. I've worked around the problem by changing MutableType.java:23 to read as follows:
Code:
if (value == null || value.equals(LazyPropertyInitializer.UNFETCHED_PROPERTY)) return null;
return deepCopyNotNull(value);
Unfortunately since I only started working with Hibernate two days ago I have no idea if this is even a legitimate problem, let alone the right fix in the right place. If anybody can shed some light on whether this is a legitimate bug (which I doubt) or if there's a change that I can make to my config to get around it I'd appreciate it.
Changes I've already made to my mapping include:
* Changing the type from date to timestamp (didn't work; this is what generated the stack trace below)
* Omitting the type attribute altogether (didn't work)
* Commenting out all of the date properties (worked, but obviously isn't a long-term solution)
Hibernate version: 3.0b4
Mapping documents:Code:
<hibernate-mapping
package="com.tribe.om.hibernate">
<class name="Tribe" proxy="Tribe">
<id name="id">
<generator class="uuid.hex"/>
</id>
<property name="categoryId" lazy="true" column="category_id"/>
<property name="name"/>
<property name="description" lazy="true"/>
<property name="local" lazy="true"/>
<property name="membership"/>
<property name="photoId" column="photo_id"/>
<property name="city" lazy="true"/>
<property name="state" lazy="true"/>
<property name="country" lazy="true"/>
<property name="matureContent" column="mature_content"/>
<property name="rss" lazy="true"/>
<property name="regionId" lazy="true" column="region_id"/>
<property name="zip" lazy="true"/>
<property name="isDeleted" column="is_deleted"/>
<property name="userCreated" column="user_created"/>
<property name="dateCreated" column="date_created" type="date"/>
<property name="userModified" lazy="true" column="user_modified"/>
<property name="dateModified" lazy="true" column="date_modified" type="date"/>
</class>
</hibernate-mapping>
Code:
UserPlugin u = getDescriptor();
String userGuid = u.getPersonId();
Query allTribeQ = session.createQuery("from Tribe as tribe " +
"where tribe.name like 'Tribe%'");
allTribes = allTribeQ.list();
Full stack trace of any exception that occurs:Here's the most relevant part:
Code:
Caused by: java.lang.ClassCastException
at org.hibernate.type.TimestampType.deepCopyNotNull(TimestampType.java:63)
at org.hibernate.type.MutableType.deepCopy(MutableType.java:22)
at org.hibernate.type.TypeFactory.deepCopy(TypeFactory.java:238)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:150)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:442)
at org.hibernate.loader.Loader.doQuery(Loader.java:400)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:199)
at org.hibernate.loader.Loader.doList(Loader.java:1417)
at org.hibernate.loader.Loader.list(Loader.java:1400)
at org.hibernate.hql.classic.QueryTranslatorImpl.list(QueryTranslatorImpl.java:876)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:831)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74)
at com.tribe.plugin.tribes.Tribes.getAllItems(Tribes.java:106)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:267)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:203)
... 66 more
And since you asked for it, here's the whole thing:
Code:
java.lang.Exception: Invocation of method 'getAllItems' in class com.tribe.plugin.tribes.Tribes threw exception class java.lang.ClassCastException : null template name was plugin/tribes/Admin.vm: line 7:26
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:242)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:175)
at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:327)
at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:51)
at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:97)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230)
at org.apache.velocity.Template.merge(Template.java:256)
at net.tribe.plugin.PluginProvider.render(PluginProvider.java:360)
at com.tribe.plugin.TribePluginProvider.render(TribePluginProvider.java:187)
at com.tribe.plugin.TribePluginProvider.renderAdmin(TribePluginProvider.java:130)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:267)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:203)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:175)
at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:220)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230)
at org.apache.velocity.Template.merge(Template.java:256)
at org.apache.velocity.app.Velocity.mergeTemplate(Velocity.java:449)
at org.apache.velocity.app.Velocity.mergeTemplate(Velocity.java:418)
at org.apache.turbine.services.velocity.TurbineVelocityService.executeRequest(TurbineVelocityService.java:415)
at org.apache.turbine.services.velocity.TurbineVelocityService.handleRequest(TurbineVelocityService.java:281)
at org.apache.turbine.services.velocity.TurbineVelocity.handleRequest(TurbineVelocity.java:71)
at org.apache.turbine.modules.screens.VelocityScreen.buildTemplate(VelocityScreen.java:119)
at org.apache.turbine.modules.screens.TemplateScreen.doBuild(TemplateScreen.java:101)
at org.apache.turbine.modules.Screen.build(Screen.java:57)
at org.apache.turbine.modules.ScreenLoader.eval(ScreenLoader.java:104)
at org.apache.turbine.modules.layouts.VelocityOnlyLayout.doBuild(VelocityOnlyLayout.java:92)
at org.apache.turbine.modules.Layout.build(Layout.java:53)
at org.apache.turbine.modules.LayoutLoader.exec(LayoutLoader.java:98)
at org.apache.turbine.modules.pages.DefaultPage.doBuild(DefaultPage.java:146)
at org.apache.turbine.modules.Page.build(Page.java:53)
at org.apache.turbine.modules.PageLoader.exec(PageLoader.java:98)
at org.apache.turbine.Turbine.doGet(Turbine.java:752)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:307)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
Caused by: java.lang.ClassCastException
at org.hibernate.type.TimestampType.deepCopyNotNull(TimestampType.java:63)
at org.hibernate.type.MutableType.deepCopy(MutableType.java:22)
at org.hibernate.type.TypeFactory.deepCopy(TypeFactory.java:238)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:150)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:442)
at org.hibernate.loader.Loader.doQuery(Loader.java:400)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:199)
at org.hibernate.loader.Loader.doList(Loader.java:1417)
at org.hibernate.loader.Loader.list(Loader.java:1400)
at org.hibernate.hql.classic.QueryTranslatorImpl.list(QueryTranslatorImpl.java:876)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:831)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74)
at com.tribe.plugin.tribes.Tribes.getAllItems(Tribes.java:106)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:267)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:203)
... 66 more
Name and version of the database you are using:
MySQL 4.0.16
The generated SQL (show_sql=true):
Sorry, I don't have this handy. I did look at the SQL in the debugger, however, and ran the same stuff in my sql client and it looked & worked fine.
Debug level Hibernate log excerpt:
Sorry, I don't have this right now.
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