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https://issues.apache.org/jira/browse/TORQUE-312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14120322#comment-14120322
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Thomas Fox commented on TORQUE-312:
-----------------------------------
The supposed reason has been confirmed.
> NPE in generation process
> -------------------------
>
> Key: TORQUE-312
> URL: https://issues.apache.org/jira/browse/TORQUE-312
> Project: Torque
> Issue Type: Bug
> Components: Generator, Templates
> Affects Versions: 4.0
> Reporter: Thomas Fox
> Assignee: Thomas Fox
> Fix For: 4.1
>
>
> In a generation process, the following NPE appeared. Supposed reason is that
> a foreign key does not have a corresponding local column
> java.lang.NullPointerException
> at
> org.apache.torque.generator.source.SourceElement$ChildList.add(SourceElement.java:691)
> at
> org.apache.torque.generator.source.SourceElement$ChildList.add(SourceElement.java:642)
> at java.util.AbstractList.add(AbstractList.java:108)
> at
> org.apache.torque.templates.transformer.om.OMForeignKeyTransformer.createLocalElementForReference(OMForeignKeyTransformer.java:776)
> at
> org.apache.torque.templates.transformer.om.OMForeignKeyTransformer.transform(OMForeignKeyTransformer.java:91)
> at
> org.apache.torque.templates.transformer.om.OMTransformer.transform(OMTransformer.java:168)
> at
> org.apache.torque.generator.control.Controller.transformSource(Controller.java:547)
> at
> org.apache.torque.generator.control.Controller.processSourceInOutput(Controller.java:260)
> at
> org.apache.torque.generator.control.Controller.processOutput(Controller.java:228)
> at
> org.apache.torque.generator.control.Controller.processGenerationUnit(Controller.java:181)
> at
> org.apache.torque.generator.control.Controller.run(Controller.java:111)
> at
> org.apache.torque.generator.maven.TorqueGeneratorMojo.execute(TorqueGeneratorMojo.java:678)
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
> at
> org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
> at
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
> at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
> at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:601)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
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