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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-10455" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-25ce98b4-b5db-4267-a0ee-4a91043db2d5" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-10455" style="color: #3b73af; text-decoration: none">HHH-10455</a> </td>
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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-10455" style="color: #3b73af; text-decoration: none">MapJoin results in NPE when using key()</a> </span> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Change By:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="thall" id="email_thall" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=thall" style="color:#6c797f;; color: #3b73af; text-decoration: none">thall</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <span class="diffcontext">The setup:<br><br>{code:java}<br>@Entity<br>@Table(name = "batch")<br>@SequenceGenerator(name = "BatchGen", sequenceName = "seq_batch", allocationSize = 1)<br>public class Batch implements Serializable {<br> ...<br> <br> @ElementCollection<br> @CollectionTable(<br> name = "batch_node",<br> //uniqueConstraints = @UniqueConstraint(columnNames = {"batch_id", "node_id"}),<br> //foreignKey = @ForeignKey,<br> joinColumns = @JoinColumn(name = "batch_id", nullable = false))<br> @MapKeyJoinColumn(name = "node_id")<br> private Map<Node, BatchNodeMetadata> batchNodeMetadata = new HashMap<>();<br> <br> ...<br>}<br><br>@Entity<br>@Table(name= "node")<br>@SequenceGenerator(name="NodeGen", sequenceName="seq_node", allocationSize=1)<br>public class Node implements Serializable {<br> ...<br>}<br><br>@Embeddable<br>public class BatchNodeMetadata implements Serializable {<br><br> @Column(nullable = false)<br> @Enumerated(EnumType.STRING)<br> private NodeMigration migrering = NodeMigration.TOTAL;<br><br> public NodeMigration getMigrering() {<br> return migrering;<br> }<br><br> public void setMigrering(NodeMigration migrering) {<br> this.migrering = migrering;<br> }<br>}<br>{code}<br><br>Testcase<br>{code:java}<br>class Test {<br><br> @Test<br> public void testGetNodesInBatch() {<br> Node n = new Node();<br> n.setName("Test");<br> nodeDAO.create(n);<br><br> Batch b = new Batch();<br> b.setName("Test");<br> b.getBatchNodeMetadata().put(n, new BatchNodeMetadata());<br> batchDAO.create(b);<br> <br> Collection<String> actual = batchDAO.getNodesInBatch(b);<br> Assert.assertEquals(1, actual.size());<br> }<br>}<br><br>class Dao {<br> public Collection<Node> getNodesInBatch(Batch batch) {<br> CriteriaBuilder cb = em.getCriteriaBuilder();<br> CriteriaQuery<Node> query = cb.createQuery(Node.class);<br> Root<Batch> root = query.from(Batch.class);<br><br> MapJoin<Batch, Node, BatchNodeMetadata> nodes = root.join(Batch_.batchNodeMetadata);<br><br> query.select(nodes.key());<br> query.where(cb.equal(root, batch));<br><br> return em.createQuery(query).getResultList();<br> }<br>}<br>{code}<br><br>*Output*<br>Everything from the setup seems to be correct<br><br></span> <span class="diffaddedchars" style="background-color:#ddfade;">{noformat}<br></span> <span class="diffcontext">Hibernate: create table batch (id integer not null, current_activity varchar(255), name varchar(255) not null, pretty_current_activity varchar(255), visas_utanför_fabriken boolean, primary key (id))<br>Hibernate: create table batch_node (batch_id integer not null, migrering varchar(255) not null, node_id integer not null, primary key (batch_id, node_id))<br>Hibernate: create table node (id integer not null, edgar_complexity varchar(255), long_name varchar(255), municipal_area varchar(255), "name" varchar(255) not null, primary key (id))<br>Hibernate: alter table batch add constraint UK_ea6wjj8co7qtkcek0at693sh5 unique (name)<br>Hibernate: alter table node add constraint UK_fwigxdmj6bsrpcmhcgpmlsirh unique ("name")<br>Hibernate: alter table batch_node add constraint FK_hp7ye0ce3g9xb2h9newetnar5 foreign key (node_id) references node<br>Hibernate: alter table batch_node add constraint FK_cdi1tq0y36ylqqm4dbvghaxk foreign key (batch_id) references batch<br>Hibernate: call next value for seq_node<br>Hibernate: insert into node (edgar_complexity, long_name, municipal_area, "name", id) values (?, ?, ?, ?, ?)<br>Hibernate: call next value for seq_batch<br>Hibernate: insert into batch (current_activity, name, pretty_current_activity, visas_utanför_fabriken, id) values (?, ?, ?, ?, ?)<br>Hibernate: insert into batch_node (batch_id, node_id, migrering) values (?, ?, ?)<br></span> <span class="diffaddedchars" style="background-color:#ddfade;">{noformat}</span> <span class="diffcontext"><br></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br></span> <span class="diffcontext">NPE when executing the criteria<br>{code:java}<br>java.lang.NullPointerException: null<br> at org.hibernate.hql.internal.ast.HqlSqlWalker.lookupProperty(HqlSqlWalker.java:592)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.addrExpr(HqlSqlBaseWalker.java:4980)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.expr(HqlSqlBaseWalker.java:1263)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.exprOrSubquery(HqlSqlBaseWalker.java:4686)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.arithmeticExpr(HqlSqlBaseWalker.java:3215)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectExpr(HqlSqlBaseWalker.java:2382)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectExprList(HqlSqlBaseWalker.java:2194)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectClause(HqlSqlBaseWalker.java:1476)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:573)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:301)<br> at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:249)<br> at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:278)<br> at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:206)<br> at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:158)<br> at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:131)<br> at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:93)<br> at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:167)<br> at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:301)<br> at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236)<br> at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1800)<br> at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:568)<br> at org.hibernate.jpa.criteria.CriteriaQueryImpl$1.buildCompiledQuery(CriteriaQueryImpl.java:336)<br> at org.hibernate.jpa.criteria.compile.CriteriaCompiler.compile(CriteriaCompiler.java:147)<br> at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:736)<br> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)<br> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)<br> at java.lang.reflect.Method.invoke(Method.java:497)<br> at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:262)<br> at com.sun.proxy.$Proxy47.createQuery(Unknown Source)<br> at com.dbmodel.dao.BatchDAO.getNodesInBatchStr(BatchDAO.java:132)<br> at com.dbmodel.dao.BatchDAO$$FastClassBySpringCGLIB$$b9d5b01c.invoke(<generated>)<br> at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)<br> at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:708)<br> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)<br> at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)<br> at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)<br> at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)<br> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)<br> at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)<br> at com.dbmodel.dao.BatchDAO$$EnhancerBySpringCGLIB$$4e2a04ba.getNodesInBatchStr(<generated>)<br> at com.dbmodel.dao.BatchDAOIT.testGetNodesInBatch(BatchDAOIT.java:79)<br>{code}</span> </td>
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