Hi everyone,

I´m currently working on a gef based Gui builder. The information of this builder should be saved in a database using hibernate. If I try to save the model, the following exception is thrown:


org.hibernate.type.SerializationException: could not serialize
at org.hibernate.util.SerializationHelper.serialize(SerializationHelper.java:158)
at org.hibernate.util.SerializationHelper.serialize(SerializationHelper.java:178)
at org.hibernate.type.SerializableType.toBytes(SerializableType.java:74)
at org.hibernate.type.SerializableType.deepCopyNotNull(SerializableType.java:70)
at org.hibernate.type.MutableType.deepCopy(MutableType.java:25)
at org.hibernate.type.MutableType.replace(MutableType.java:36)
at org.hibernate.type.AbstractType.replace(AbstractType.java:153)
at org.hibernate.type.TypeFactory.replace(TypeFactory.java:453)
at org.hibernate.event.def.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:361)
at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:179)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:123)
at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:687)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:669)
at org.hibernate.engine.CascadingAction$6.cascade(CascadingAction.java:245)
at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268)
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216)
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:296)
at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:242)
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:219)
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
at org.hibernate.engine.Cascade.cascade(Cascade.java:130)
at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:437)
at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:194)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:123)
at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:687)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:669)
at org.hibernate.engine.CascadingAction$6.cascade(CascadingAction.java:245)
at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268)
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216)
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:296)
at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:242)
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:219)
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
at org.hibernate.engine.Cascade.cascade(Cascade.java:130)
at org.hibernate.event.def.DefaultMergeEventListener.cascadeOnMerge(DefaultMergeEventListener.java:390)
at org.hibernate.event.def.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:266)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:120)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:53)
at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:677)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:661)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:665)
at ...modelersuite.persistence.DAOBase.merge(DAOBase.java:62)
at ...modelersuite.ModelEditor.doSave(ModelEditor.java:74)
at ....actions.SetDiagramReadonlyAction.run(SetDiagramReadonlyAction.java:46)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3880)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3473)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
Caused by: java.io.NotSerializableException: ....metamodel.properties.UserInterfaceEventPropertySource
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at java.util.HashSet.writeObject(Unknown Source)
at sun.reflect.GeneratedMethodAccessor50.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at org.hibernate.util.SerializationHelper.serialize(SerializationHelper.java:154)
... 74 more

The "Caused By" class is not mapped. The problem occures if the user draws a EventMappingConnection between a Button and a UserInterfaceEvent and switches to the properties view of the UserInterfaceEvent. If I don´t switch to the properties view - a view in which you can show the properties of a figure i.e x-coordinates, y-coordinates, name etc.. - saving works fine.

The mapping files:

Button:

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

<hibernate-mapping>
<subclass name="....metamodel.guimodel.Button"
extends="....metamodel.guimodel.SimpleComponent">

<many-to-one name="container" column="BUTTON_CONTAINER_FK_ID"
cascade="persist,merge,lock" lazy="false"></many-to-one>

</subclass>
</hibernate-mapping>

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

<hibernate-mapping>
<subclass name="....metamodel.guimodel.SimpleComponent"
extends="....metamodel.DiagramElement" abstract="true">

<set name="eventmappingconnection" cascade="all-delete-orphan"
lazy="false" inverse="true">
<key>
<column name="EVENT_MAPPING_SOURCE_FK_ID" not-null="false"></column>
</key>
<one-to-many class="....metamodel.guimodel.EventMapping" />
</set>
...

EventMapping:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<subclass name="...metamodel.guimodel.EventMapping"
extends="...metamodel.DiagramElement">

<many-to-one name="source" column="EVENT_MAPPING_SOURCE_FK_ID"
cascade="persist,merge,lock"></many-to-one>
<many-to-one name="target" column="EVENT_MAPPING_TARGET_FK_ID"
cascade="persist,merge,lock"></many-to-one>
</subclass>
</hibernate-mapping>

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

<hibernate-mapping>
<subclass name="...metamodel.guimodel.UserInterfaceEvent"
extends="...metamodel.DiagramElement">

<set name="eventmappingconnection" cascade="all-delete-orphan"
lazy="false" inverse="true">
<key>
<column name="EVENT_MAPPING_TARGET_FK_ID" not-null="false"></column>
</key>
<one-to-many class="...metamodel.guimodel.EventMapping" />
</set>

</subclass>
</hibernate-mapping>

I´m pretty much clueless, because there are other modeler with apparently the same functionality but no errors..

Thanks for your help
Best regards

StefanKNeedsHelp

Hello again,
It is really crazy. I know how to solve the Problem but I do not know why that problem occurs.

DiagramElement has an member called propertySource. This member should be transient, which means that in DiagramElement the mapping for that member does not exist.
(I think that's the way to tell hibernate this member is transient isn't it?)

So in the special case of the serializable Exception hibernate want to save the propertySource member, which causes the Exception!
If I set the member to null, everything works fine!

So does anybody know why hibernate wants to save that member?
Other implementations of DiagramElement do not have that problem, just a few...

So I would really appreciate any help!
Thanks in advance!