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From "Michael Dick (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-1141) NPE at org.apache.openjpa.jdbc.meta.MappingInfo.mergeJoinColumn(MappingInfo.java:1400)
Date Tue, 07 Jul 2009 17:16:14 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-1141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12728200#action_12728200
] 

Michael Dick commented on OPENJPA-1141:
---------------------------------------

The entities contain comments indicating that they were generated. Did you use the OpenJPA
ReverseMappingTool, or something else (ie Dali)? 

If you used the OpenJPAReverseMappingTool then would it be possible to see the table ddl that
resulted in these entities? It looks like some annotations need to be added to complete the
mappings. 

> NPE  at org.apache.openjpa.jdbc.meta.MappingInfo.mergeJoinColumn(MappingInfo.java:1400)
> ---------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-1141
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1141
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jdbc
>    Affects Versions: 1.2.0
>            Reporter: Yann
>             Fix For: 1.2.2
>
>         Attachments: TestMappingProblem.zip
>
>
> We have the NPE shown below in a reproducible testcase (ZIP attached to JIRA ...).
> We've reduced our complex intended target domain model (about 200+ Entities) to a simpler
model with only 3 classes which illustrate the problem: You'll find attached a test project
with a first entity which has a a OneToMany (with an ElementJoinColumns, but that shouldn't
matter?) to a second entity has a ManyToOne to a third entity. The middle entity has a Composite
ID Class including a ManyToOne as a key, which according to http://openjpa.apache.org/builds/1.2.0/apache-openjpa-1.2.0/docs/manual/ref_guide_pc_oid.html#ref_guide_pc_oid_entitypk
is supported, so this seems a bug in OpenJPA's mapping algos, somehow?
> <openjpa-1.2.1-r752877:753278 nonfatal general error> org.apache.openjpa.persistence.PersistenceException:
null
>         at org.apache.openjpa.kernel.QueryImpl.compileForCompilation(QueryImpl.java:610)
>         at org.apache.openjpa.kernel.QueryImpl.compileForExecutor(QueryImpl.java:667)
>         at org.apache.openjpa.kernel.QueryImpl.getOperation(QueryImpl.java:1492)
>         at org.apache.openjpa.kernel.DelegatingQuery.getOperation(DelegatingQuery.java:123)
>         at org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:243)
>         at org.apache.openjpa.persistence.QueryImpl.getResultList(QueryImpl.java:294)
>         at testcase.TestMappingProblem.doTest(TestMappingProblem.java:42)
>         at testcase.TestMappingProblem.testIt(TestMappingProblem.java:20)
>         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 junit.framework.TestCase.runTest(TestCase.java:154)
>         at junit.framework.TestCase.runBare(TestCase.java:127)
>         at junit.framework.TestResult$1.protect(TestResult.java:106)
>         at junit.framework.TestResult.runProtected(TestResult.java:124)
>         at junit.framework.TestResult.run(TestResult.java:109)
>         at junit.framework.TestCase.run(TestCase.java:118)
>         at junit.framework.TestSuite.runTest(TestSuite.java:208)
>         at junit.framework.TestSuite.run(TestSuite.java:203)
>         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 org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213)
>         at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
>         at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
>         at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
>         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 org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:345)
>         at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1009)
> Caused by: java.lang.NullPointerException
>         at org.apache.openjpa.jdbc.meta.MappingInfo.mergeJoinColumn(MappingInfo.java:1400)
>         at org.apache.openjpa.jdbc.meta.MappingInfo.createJoins(MappingInfo.java:1206)
>         at org.apache.openjpa.jdbc.meta.MappingInfo.createForeignKey(MappingInfo.java:968)
>         at org.apache.openjpa.jdbc.meta.ValueMappingInfo.getTypeJoin(ValueMappingInfo.java:104)
>         at org.apache.openjpa.jdbc.meta.strats.RelationFieldStrategy.map(RelationFieldStrategy.java:157)
>         at org.apache.openjpa.jdbc.meta.FieldMapping.setStrategy(FieldMapping.java:121)
>         at org.apache.openjpa.jdbc.meta.RuntimeStrategyInstaller.installStrategy(RuntimeStrategyInstaller.java:80)
>         at org.apache.openjpa.jdbc.meta.FieldMapping.resolveMapping(FieldMapping.java:454)
>         at org.apache.openjpa.jdbc.meta.FieldMapping.resolve(FieldMapping.java:419)
>         at org.apache.openjpa.jdbc.meta.ClassMapping.resolveNonRelationMappings(ClassMapping.java:869)
>         at org.apache.openjpa.jdbc.meta.MappingRepository.prepareMapping(MappingRepository.java:339)
>         at org.apache.openjpa.meta.MetaDataRepository.preMapping(MetaDataRepository.java:662)
>         at org.apache.openjpa.meta.MetaDataRepository.resolve(MetaDataRepository.java:549)
>         at org.apache.openjpa.meta.MetaDataRepository.getMetaData(MetaDataRepository.java:308)
>         at org.apache.openjpa.meta.MetaDataRepository.getMetaData(MetaDataRepository.java:363)
>         at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getClassMetaData(JPQLExpressionBuilder.java:159)
>         at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.resolveClassMetaData(JPQLExpressionBuilder.java:139)
>         at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:225)
>         at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:195)
>         at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateType(JPQLExpressionBuilder.java:188)
>         at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.access$600(JPQLExpressionBuilder.java:69)
>         at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder$ParsedJPQL.populate(JPQLExpressionBuilder.java:1756)
>         at org.apache.openjpa.kernel.jpql.JPQLParser.populate(JPQLParser.java:56)
>         at org.apache.openjpa.kernel.ExpressionStoreQuery.populateFromCompilation(ExpressionStoreQuery.java:153)
>         at org.apache.openjpa.kernel.QueryImpl.newCompilation(QueryImpl.java:658)
>         at org.apache.openjpa.kernel.QueryImpl.compilationFromCache(QueryImpl.java:639)
>         at org.apache.openjpa.kernel.QueryImpl.compileForCompilation(QueryImpl.java:605)
>         ... 33 more

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