| @Embeddable Inheritance [message #724410] |
Mon, 12 September 2011 06:04  |
Eclipse User |
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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 14:55] by Moderator |
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| (no subject) [message #726320 is a reply to message #725756] |
Sat, 17 September 2011 05:38  |
| Eclipse User |
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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 #731257 is a reply to message #727280] |
Fri, 30 September 2011 08:05 |
| Eclipse User |
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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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