Thanks for the report! I've made a lot of fixes since the RC1 build but they're not backwards-compatible with the 1.2.6 SDK, so unfortunately I can't release them until the next SDK is out. Your test case works for me with my latest build so this will behave correctly in the next release.
Thanks, Max On Mon, Nov 23, 2009 at 1:56 PM, R. A. <ramanauskas.ado...@gmail.com> wrote: > >> > http://datanucleus-appengine.googlecode.com/files/appengine-orm-1.0.4.RC1.zip > >> This release provides support for inheritance of native datastore types > and embedded classes. > > Can't get inheritance to run. Tested on *-1.0.3 and *-1.0.4.RC1. > Without AbstractEntity, 2 entities with OneToMany relationship works > perfectly. Is it the problem with Key id type? NullPointerException > is thrown when i access child list element: > > public void test() { > List<ParentEntity> parents = tdao.load(); > for (ParentEntity pe : parents) { > List<ChildEntity> childs = pe.getChilds(); > System.out.println(".. childs.size: " + childs.size()); > for(ChildEntity ce : childs) { // <----- NPE > } > } > } > > @Entity > @MappedSuperclass > public abstract class AbstractEntity { > > @Id > @GeneratedValue(strategy = GenerationType.IDENTITY) > private Key id; > > private String name; > ... > } > > @Entity > public class ParentEntity extends AbstractEntity { > > @OneToMany(mappedBy="parent", cascade=CascadeType.ALL) > private List<ChildEntity> childs; > ... > } > > @Entity > public class ChildEntity extends AbstractEntity { > > private Long value; > > @ManyToOne > private ParentEntity parent; > ... > } > > Nov 23, 2009 8:20:34 PM com.google.apphosting.utils.jetty.JettyLogger > warn > WARNING: Nested in > org.springframework.web.util.NestedServletException: Request > processing failed; nested exception is java.lang.NullPointerException: > java.lang.NullPointerException > at > > org.datanucleus.store.mapped.mapping.PersistenceCapableMapping.getObjectForApplicationIdentity > (PersistenceCapableMapping.java:971) > at > org.datanucleus.store.mapped.mapping.PersistenceCapableMapping.getObject > (PersistenceCapableMapping.java:720) > at > org.datanucleus.store.appengine.DatastoreRelationFieldManager.lookupParent > (DatastoreRelationFieldManager.java:309) > at > > org.datanucleus.store.appengine.DatastoreRelationFieldManager.fetchRelationField > (DatastoreRelationFieldManager.java:289) > at > org.datanucleus.store.appengine.DatastoreFieldManager.fetchObjectField > (DatastoreFieldManager.java:271) > at org.datanucleus.state.AbstractStateManager.replacingObjectField > (AbstractStateManager.java:1197) > at gae.test.ChildEntity.jdoReplaceField(ChildEntity.java) > at gae.test.AbstractEntity.jdoReplaceFields(AbstractEntity.java) > at org.datanucleus.state.JDOStateManagerImpl.replaceFields > (JDOStateManagerImpl.java:2772) > at org.datanucleus.state.JDOStateManagerImpl.replaceFields > (JDOStateManagerImpl.java:2791) > at > org.datanucleus.store.appengine.DatastorePersistenceHandler.fetchObject > (DatastorePersistenceHandler.java:443) > at org.datanucleus.store.appengine.query.DatastoreQuery.entityToPojo > (DatastoreQuery.java:433) > at > > org.datanucleus.store.appengine.DatastoreElementContainerStoreSpecialization.getChildren > (DatastoreElementContainerStoreSpecialization.java:103) > at org.datanucleus.store.appengine.DatastoreFKListStore.listIterator > (DatastoreFKListStore.java:47) > at > org.datanucleus.store.mapped.scostore.AbstractListStore.listIterator > (AbstractListStore.java:84) > at org.datanucleus.store.mapped.scostore.AbstractListStore.iterator > (AbstractListStore.java:74) > at org.datanucleus.sco.backed.List.loadFromStore(List.java:241) > at org.datanucleus.sco.backed.List.iterator(List.java:507) > at > java.util.AbstractCollection.toString(AbstractCollection.java:414) > at java.lang.String.valueOf(String.java:2826) > at java.lang.StringBuilder.append(StringBuilder.java:115) > at gae.test.TestServiceImpl.openParentsWithChilds > (TestServiceImpl.java:27) > 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:597) > at > com.google.appengine.tools.development.agent.runtime.Runtime.invoke > (Runtime.java:100) > at > org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection > (AopUtils.java:307) > at > > org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint > (ReflectiveMethodInvocation.java:183) > at > org.springframework.aop.framework.ReflectiveMethodInvocation.proceed > (ReflectiveMethodInvocation.java:150) > at > org.springframework.transaction.interceptor.TransactionInterceptor.invoke > (TransactionInterceptor.java:107) > at > org.springframework.aop.framework.ReflectiveMethodInvocation.proceed > (ReflectiveMethodInvocation.java:172) > at org.springframework.aop.framework.JdkDynamicAopProxy.invoke > (JdkDynamicAopProxy.java:202) > at $Proxy28.openParentsWithChilds(Unknown Source) > at gae.test.TestController.test(TestController.java:17) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at sun.reflect.NativeMethodAccessorImpl.invoke > (NativeMethodAccessorImpl.java:39) > at sun.reflect.DelegatingMethodAccessorImpl.invoke > (DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > com.google.appengine.tools.development.agent.runtime.Runtime.invoke > (Runtime.java:100) > at > > org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod > (HandlerMethodInvoker.java:654) > at > > org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod > (HandlerMethodInvoker.java:160) > at > > org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod > (AnnotationMethodHandlerAdapter.java:378) > at > > org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle > (AnnotationMethodHandlerAdapter.java:366) > at org.springframework.web.servlet.DispatcherServlet.doDispatch > (DispatcherServlet.java:781) > at org.springframework.web.servlet.DispatcherServlet.doService > (DispatcherServlet.java:726) > at org.springframework.web.servlet.FrameworkServlet.processRequest > (FrameworkServlet.java:636) > at org.springframework.web.servlet.FrameworkServlet.doGet > (FrameworkServlet.java:545) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) > at > org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: > 487) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1093) > at > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter > (TransactionCleanupFilter.java:43) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1084) > at com.google.appengine.tools.development.StaticFileFilter.doFilter > (StaticFileFilter.java:121) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1084) > at org.mortbay.jetty.servlet.ServletHandler.handle > (ServletHandler.java:360) > at org.mortbay.jetty.security.SecurityHandler.handle > (SecurityHandler.java:216) > at org.mortbay.jetty.servlet.SessionHandler.handle > (SessionHandler.java:181) > at org.mortbay.jetty.handler.ContextHandler.handle > (ContextHandler.java:712) > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java: > 405) > at > com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle > (DevAppEngineWebAppContext.java:54) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at com.google.appengine.tools.development.JettyContainerService > $ApiProxyHandler.handle(JettyContainerService.java:342) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at org.mortbay.jetty.Server.handle(Server.java:313) > at > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: > 506) > at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete > (HttpConnection.java:830) > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) > at org.mortbay.io.nio.SelectChannelEndPoint.run > (SelectChannelEndPoint.java:396) > at org.mortbay.thread.BoundedThreadPool$PoolThread.run > (BoundedThreadPool.java:442) > Nov 23, 2009 8:20:34 PM 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