[hibernate-issues] [Hibernate-JIRA] Updated: (ANN-630) @ManyToMany and @Index

@ManyToMany and @Index ---------------------- Key: ANN-630 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-630 Project: Hibernate Annotations Issue Type: Bug Components: binder Affects Versions: 3.3.0.ga Environment: Windows Vista java version "1.5.0_11" Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_11-b03) Java HotSpot(TM) Client VM (build 1.5.0_11-b03, mixed mode) Reporter: Peter K. Guldbæk I have trouble adding an index to a column of a table which is part of a many-to-many property mapping. The following example causes a NullPointerException when generating the DDL (the exception can be seen at the end of my post): @Entity @Table(name="usr") public class User implements Serializable { @Id @GeneratedValue(strategy=GenerationType.AUTO) public Integer id; @ManyToMany(targetEntity=Target.class, cascade={}) @Index(name="fkey_usr_target", columnNames="usr_id") @JoinTable(name="usr_target", joinColumns=@JoinColumn(name="usr_id"), inverseJoinColumns=@JoinColumn(name="target_id")) public Collection<Target> targets; } @Entity @Table(name="target") public class Target implements Serializable { @Id @GeneratedValue(strategy=GenerationType.AUTO) public Integer id; @Basic public String myValue; } NullPointerException thrown when an @Index annotation is used with a @ManyToMany: java.lang.NullPointerException at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:1594) at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:733) at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:498) at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:277) at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1115) at org.hibernate.tool.ant.ConfigurationTask.getConfiguration(ConfigurationTask.java:56) at org.hibernate.tool.ant.HibernateToolTask.getConfiguration(HibernateToolTask.java:299) at org.hibernate.tool.ant.Hbm2DDLExporterTask.execute(Hbm2DDLExporterTask.java:45) at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:183) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:357) at org.apache.tools.ant.Target.performTasks(Target.java:385) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329) at org.apache.tools.ant.Project.executeTarget(Project.java:1298) at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) at org.apache.tools.ant.Project.executeTargets(Project.java:1181) at org.apache.tools.ant.Main.runBuild(Main.java:698) at org.apache.tools.ant.Main.startAnt(Main.java:199) at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257) at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)