| @Embeddable Inheritance [message #724410] |
Mon, 12 September 2011 10:04  |
 Hannes 
Messages: 11
Registered: September 2011 |
Junior Member |
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Hello,
I have an @Embeddable class (let's call it EmbeddableParent). EmbeddableParent is subclassed by another class, also annotated with @Embeddable (let's call this class EmbeddableChild). EmbeddableParent also embeds a third class EmbeddableC. To clear things up, a piece of sample code:
@Embeddable
public class EmbeddableC implements Serializable {
private String stringA;
private String stringB;
...
}
@Embeddable
public class EmbeddableParent implements Serializable {
@Embedded
private EmbeddableC embedded;
...
}
@Embeddable
public class EmbeddableChild extends EmbeddableParent implements Serializable {
...
}
I now used the DescriptorCustomizer and InheritancePolicy to make inheritance for Embeddables work, as suggested by en.wikibooks.org/wiki/Java_Persistence/Embeddables#Inheritance (Apparently I cannot post links, unless I have posted more than 5 messages.).
The code I wrote looks like this:
@Customizer(EmbeddableParent.class)
@Embeddable
public class EmbeddableParent implements Serializable, DescriptorCustomizer {
@Embedded
private EmbeddableC embedded;
...
@Override
public void customize(ClassDescriptor descriptor) throws Exception {
descriptor.getInheritancePolicy().setSingleTableStrategy();
DatabaseField indicatorField = new DatabaseField();
indicatorField.setName("QTYPE");
indicatorField.setLength(20);
indicatorField.setType(java.lang.String.class);
descriptor.getInheritancePolicy().setClassIndicatorField(indicatorField);
descriptor.getInheritancePolicy().useClassNameAsIndicator();
}
}
@Embeddable
@Customizer(EmbeddableChild.class)
public class EmbeddableChild extends EmbeddableParent implements Serializable, DescriptorCustomizer {
...
@Override
public void customize(ClassDescriptor descriptor) {
descriptor.getInheritancePolicy().setParentClass(EmbeddableParent.class);
}
}
Using this code, generation of tables from entities fails with a NullPointerException:
java.lang.NullPointerException
at org.eclipse.persistence.descriptors.InheritancePolicy.updateTables(InheritancePolicy.java:1847)
1847 Vector<DatabaseTable> parentTables = getParentDescriptor().getTables();
java.lang.NullPointerException
at org.eclipse.persistence.descriptors.InheritancePolicy.postInitialize(InheritancePolicy.java:1122)
1121 ClassDescriptor parent = getParentDescriptor();
1122 if (parent.hasPreDeleteMappings()) {
It seems, parentDescriptor is not set correctly. What am I doing wrong? Did I miss something? Or is it a bug? Any help is appreciated.
[Updated on: Tue, 13 September 2011 18:55] Report message to a moderator |
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| (no subject) [message #726320 is a reply to message #725756] |
Sat, 17 September 2011 09:38  |
Hannes 
Messages: 14
Registered: March 2011 |
Junior Member |
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Thank you for looking into this.
Here is the full output of "Generate Tables from Entities", including the stack trace:
[EL Config]: The access type for the persistent class [class test.embeddable.EntityClass] is set to [FIELD].
[EL Config]: The access type for the persistent class [class test.embeddable.EmbeddableChild] is set to [FIELD].
[EL Config]: The alias name for the entity class [class test.embeddable.EntityClass] is being defaulted to: EntityClass.
[EL Config]: The table name for entity [class test.embeddable.EntityClass] is being defaulted to: ENTITYCLASS.
[EL Config]: The column name for element [id] is being defaulted to: ID.
[EL Info]: EclipseLink, version: Eclipse Persistence Services - 2.3.0.v20110604-r9504
[EL Fine]: Detected Vendor platform: org.eclipse.persistence.platform.database.JavaDBPlatform
[EL Config]: Connection(1309828059)--connecting(DatabaseLogin(
platform=>JavaDBPlatform
user name=> ""
datasource URL=> "jdbc:derby:/Users/hannesweisbach/TestDB;create=true"
))
[EL Config]: Connection(123234458)--Connected: jdbc:derby:/Users/hannesweisbach/TestDB
User: APP
Database: Apache Derby Version: 10.8.1.2 - (1095077)
Driver: Apache Derby Embedded JDBC Driver Version: 10.8.1.2 - (1095077)
[EL Config]: Connection(1027299898)--connecting(DatabaseLogin(
platform=>JavaDBPlatform
user name=> ""
datasource URL=> "jdbc:derby:/Users/hannesweisbach/TestDB;create=true"
))
[EL Config]: Connection(1594820133)--Connected: jdbc:derby:/Users/hannesweisbach/TestDB
User: APP
Database: Apache Derby Version: 10.8.1.2 - (1095077)
Driver: Apache Derby Embedded JDBC Driver Version: 10.8.1.2 - (1095077)
[EL Severe]: Local Exception Stack:
Exception [EclipseLink-0] (Eclipse Persistence Services - 2.3.0.v20110604-r9504): org.eclipse.persistence.exceptions.IntegrityException
Descriptor Exceptions:
---------------------------------------------------------
Runtime Exceptions:
---------------------------------------------------------
java.lang.NullPointerException
java.lang.NullPointerException
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:535)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:476)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:435)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:673)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:618)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:206)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:472)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:290)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:268)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:86)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:77)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:64)
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.3.0.v20110604-r9504): org.eclipse.persistence.exceptions.IntegrityException
Descriptor Exceptions:
---------------------------------------------------------
Runtime Exceptions:
---------------------------------------------------------
java.lang.NullPointerException
java.lang.NullPointerException
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:501)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:290)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:268)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:86)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:77)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:64)
Caused by: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.3.0.v20110604-r9504): org.eclipse.persistence.exceptions.IntegrityException
Descriptor Exceptions:
---------------------------------------------------------
Runtime Exceptions:
---------------------------------------------------------
java.lang.NullPointerException
java.lang.NullPointerException
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:535)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:476)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:435)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:673)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:618)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:206)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:472)
... 7 more
Descriptor Exceptions:
---------------------------------------------------------
Runtime Exceptions:
---------------------------------------------------------
java.lang.NullPointerException
at org.eclipse.persistence.descriptors.InheritancePolicy.updateTables(InheritancePolicy.java:1847)
at org.eclipse.persistence.descriptors.InheritancePolicy.preInitialize(InheritancePolicy.java:1155)
at org.eclipse.persistence.descriptors.ClassDescriptor.preInitialize(ClassDescriptor.java:3616)
at org.eclipse.persistence.mappings.AggregateObjectMapping.initialize(AggregateObjectMapping.java:1156)
at org.eclipse.persistence.descriptors.ClassDescriptor.initialize(ClassDescriptor.java:2803)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:512)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:476)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:435)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:673)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:618)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:206)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:472)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:290)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:268)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:86)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:77)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:64)
java.lang.NullPointerException
at org.eclipse.persistence.descriptors.InheritancePolicy.postInitialize(InheritancePolicy.java:1122)
at org.eclipse.persistence.descriptors.ClassDescriptor.postInitialize(ClassDescriptor.java:3461)
at org.eclipse.persistence.mappings.AggregateObjectMapping.postInitialize(AggregateObjectMapping.java:1357)
at org.eclipse.persistence.descriptors.ClassDescriptor.postInitialize(ClassDescriptor.java:3430)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:526)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:476)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:435)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:673)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:618)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:206)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:472)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:290)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:268)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:86)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:77)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:64)
[EL Severe]: Local Exception Stack:
Exception [EclipseLink-0] (Eclipse Persistence Services - 2.3.0.v20110604-r9504): org.eclipse.persistence.exceptions.IntegrityException
Descriptor Exceptions:
---------------------------------------------------------
Runtime Exceptions:
---------------------------------------------------------
java.lang.NullPointerException
java.lang.NullPointerException
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:535)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:476)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:435)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:673)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:618)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:206)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:472)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:290)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:268)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:86)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:77)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:64)
Descriptor Exceptions:
---------------------------------------------------------
Runtime Exceptions:
---------------------------------------------------------
java.lang.NullPointerException
at org.eclipse.persistence.descriptors.InheritancePolicy.updateTables(InheritancePolicy.java:1847)
at org.eclipse.persistence.descriptors.InheritancePolicy.preInitialize(InheritancePolicy.java:1155)
at org.eclipse.persistence.descriptors.ClassDescriptor.preInitialize(ClassDescriptor.java:3616)
at org.eclipse.persistence.mappings.AggregateObjectMapping.initialize(AggregateObjectMapping.java:1156)
at org.eclipse.persistence.descriptors.ClassDescriptor.initialize(ClassDescriptor.java:2803)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:512)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:476)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:435)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:673)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:618)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:206)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:472)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:290)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:268)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:86)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:77)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:64)
java.lang.NullPointerException
at org.eclipse.persistence.descriptors.InheritancePolicy.postInitialize(InheritancePolicy.java:1122)
at org.eclipse.persistence.descriptors.ClassDescriptor.postInitialize(ClassDescriptor.java:3461)
at org.eclipse.persistence.mappings.AggregateObjectMapping.postInitialize(AggregateObjectMapping.java:1357)
at org.eclipse.persistence.descriptors.ClassDescriptor.postInitialize(ClassDescriptor.java:3430)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:526)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:476)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:435)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:673)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:618)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:206)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:472)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:290)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:268)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:86)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:77)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:64)
Actually, at this point I really am trying to get the minimal example running, I posted earlier. I have attached a tarball containing the sources for the minimal example and the persistence.xml (without database configuration).
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end
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| Re: (no subject) [message #726865 is a reply to message #726316] |
Mon, 19 September 2011 18:28 |
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I believe that the issue is that the since the EmbeddableParent is never referenced by any Entity it is not processed, so their is no descriptor for it.
Does it work if you reference the parent instead of the child, or both?
You may be able to define a RelationalDescriptor for the parent in a SessionCustomizer.
This may have been resolved, so you may wish to try the latest build. Otherwise log a bug and vote for it. The ideal fix would be to just support inheritance with embeddables in EclipseLink's JPA annotation processing.
James : Wiki : Book : Blog : Twitter
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| Re: (no subject) [message #731257 is a reply to message #727280] |
Fri, 30 September 2011 12:05 |
Hannes
Messages: 11
Registered: September 2011 |
Junior Member |
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Using a SessionCustomizer, i set the parent and child descriptors, respectively. The NullpointerException is gone, but the generated table is empty:
[EL Fine]: Connection(1237941458)--CREATE TABLE ENTITYCLASS (ID BIGINT NOT NULL, PRIMARY KEY (ID))
The code for the SessionCustomizer is as follows:
...
@Override
public void customize(Session session) throws Exception {
ClassDescriptor parent = session
.getClassDescriptor(EmbeddableParent.class);
ClassDescriptor child = session
.getClassDescriptor(EmbeddableChild.class);
child.getInheritancePolicy().setParentDescriptor(parent);
parent.getInheritancePolicy().addChildDescriptor(child);
}
...
I suppose, the empty table has something to do with EmbeddableParent no being referenced, so I added another entity, which embeds an EmbeddableParent object:
@Entity
public class OtherEntity {
@Id
@GeneratedValue
private long id;
@Embedded
EmbeddableParent z;
}
Now, when generating tables, the following NullpointerException occurs:
[EL Config]: The access type for the persistent class [class test.embeddable.OtherEntity] is set to [FIELD].
[EL Config]: The access type for the persistent class [class test.embeddable.EntityClass] is set to [FIELD].
[EL Config]: The access type for the persistent class [class test.embeddable.EmbeddableParent] is set to [FIELD].
[EL Config]: The access type for the persistent class [class test.embeddable.EmbeddableA] is set to [FIELD].
[EL Config]: The access type for the persistent class [class test.embeddable.EmbeddableChild] is set to [FIELD].
[EL Config]: The alias name for the entity class [class test.embeddable.OtherEntity] is being defaulted to: OtherEntity.
[EL Config]: The table name for entity [class test.embeddable.OtherEntity] is being defaulted to: OTHERENTITY.
[EL Config]: The column name for element [id] is being defaulted to: ID.
[EL Config]: The column name for element [b] is being defaulted to: B.
[EL Config]: The column name for element [a] is being defaulted to: A.
[EL Config]: The column name for element [c] is being defaulted to: C.
[EL Config]: The alias name for the entity class [class test.embeddable.EntityClass] is being defaulted to: EntityClass.
[EL Config]: The table name for entity [class test.embeddable.EntityClass] is being defaulted to: ENTITYCLASS.
[EL Config]: The column name for element [id] is being defaulted to: ID.
[EL Info]: EclipseLink, version: Eclipse Persistence Services - 2.3.0.v20110604-r9504
[EL Fine]: Detected Vendor platform: org.eclipse.persistence.platform.database.JavaDBPlatform
[EL Config]: Connection(1846341136)--connecting(DatabaseLogin(
platform=>JavaDBPlatform
user name=> ""
datasource URL=> "jdbc:derby:/Users/hannesweisbach/TestDB;create=true"
))
[EL Config]: Connection(1292981053)--Connected: jdbc:derby:/Users/hannesweisbach/TestDB
User: APP
Database: Apache Derby Version: 10.8.1.2 - (1095077)
Driver: Apache Derby Embedded JDBC Driver Version: 10.8.1.2 - (1095077)
[EL Config]: Connection(745533778)--connecting(DatabaseLogin(
platform=>JavaDBPlatform
user name=> ""
datasource URL=> "jdbc:derby:/Users/hannesweisbach/TestDB;create=true"
))
[EL Config]: Connection(1359545169)--Connected: jdbc:derby:/Users/hannesweisbach/TestDB
User: APP
Database: Apache Derby Version: 10.8.1.2 - (1095077)
Driver: Apache Derby Embedded JDBC Driver Version: 10.8.1.2 - (1095077)
[EL Info]: file:/Users/hannesweisbach/Documents/uni/master/salespoint/implementation/kp-salespoint/Embeddable_test/bin/_Embeddable_test_url=jdbc:derby:/Users/hannesweisbach/TestDB;create=true login successful
[EL Severe]: java.lang.NullPointerException
at org.eclipse.persistence.internal.helper.DatabaseField.getTableName(DatabaseField.java:312)
at org.eclipse.persistence.tools.schemaframework.DefaultTableGenerator.initTableSchema(DefaultTableGenerator.java:303)
at org.eclipse.persistence.tools.schemaframework.DefaultTableGenerator.generateDefaultTableCreator(DefaultTableGenerator.java:175)
at org.eclipse.persistence.tools.schemaframework.SchemaManager.getDefaultTableCreator(SchemaManager.java:902)
at org.eclipse.persistence.tools.schemaframework.SchemaManager.replaceDefaultTables(SchemaManager.java:953)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.createOrReplaceDefaultTables(EntityManagerFactoryProvider.java:90)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.writeDDLToDatabase(EntityManagerFactoryProvider.java:365)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.generateDDL(EntityManagerSetupImpl.java:2787)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:477)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:290)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:268)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:86)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:77)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:64)
Exception in thread "main" javax.persistence.PersistenceException: java.lang.NullPointerException
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:501)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:188)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:277)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:290)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:268)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:86)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:77)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:64)
Caused by: java.lang.NullPointerException
at org.eclipse.persistence.internal.helper.DatabaseField.getTableName(DatabaseField.java:312)
at org.eclipse.persistence.tools.schemaframework.DefaultTableGenerator.initTableSchema(DefaultTableGenerator.java:303)
at org.eclipse.persistence.tools.schemaframework.DefaultTableGenerator.generateDefaultTableCreator(DefaultTableGenerator.java:175)
at org.eclipse.persistence.tools.schemaframework.SchemaManager.getDefaultTableCreator(SchemaManager.java:902)
at org.eclipse.persistence.tools.schemaframework.SchemaManager.replaceDefaultTables(SchemaManager.java:953)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.createOrReplaceDefaultTables(EntityManagerFactoryProvider.java:90)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.writeDDLToDatabase(EntityManagerFactoryProvider.java:365)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.generateDDL(EntityManagerSetupImpl.java:2787)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:477)
... 7 more
Debugging showed, that the NullpointerException occurs, when the table for OtherEntity is created. For a field in EmbeddableParent, namely "String c", a DatabasField object is generated which does not have a table set.
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