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HiddenClassCastException
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| package com.example.demo; | |
| import jakarta.persistence.EntityManager; | |
| import org.springframework.boot.CommandLineRunner; | |
| import org.springframework.boot.SpringApplication; | |
| import org.springframework.boot.autoconfigure.SpringBootApplication; | |
| import org.springframework.context.annotation.Bean; | |
| import org.springframework.transaction.support.TransactionTemplate; | |
| @SpringBootApplication | |
| public class DemoApplication { | |
| public static void main(String[] args) { | |
| SpringApplication.run(DemoApplication.class, args); | |
| } | |
| @Bean | |
| CommandLineRunner commandLineRunner(EntityManager em, TransactionTemplate tt) { | |
| return args -> { | |
| tt.executeWithoutResult(it -> { | |
| IdClassExampleDepartment dep1 = new IdClassExampleDepartment(); | |
| dep1.setDepartmentId(1L); | |
| dep1.setName("Dep1"); | |
| IdClassExampleEmployee emp1 = new IdClassExampleEmployee(); | |
| emp1.setEmpId(1L); | |
| emp1.setDepartment(dep1); | |
| em.persist(emp1); | |
| ReferencingIdClassExampleEmployee refEmp1 = new ReferencingIdClassExampleEmployee(); | |
| refEmp1.setId(1L); | |
| refEmp1.setEmployee(emp1); | |
| em.persist(refEmp1); | |
| em.createQuery( | |
| "SELECT r FROM ReferencingIdClassExampleEmployee r LEFT JOIN r.employee e WHERE e.empId = :employeeId") | |
| .setParameter("employeeId", 1L).getResultList(); | |
| }); | |
| }; | |
| } | |
| } |
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| package com.example.demo; | |
| import jakarta.persistence.Entity; | |
| import jakarta.persistence.Id; | |
| @Entity | |
| public class EmbeddedIdExampleDepartment { | |
| private String name; | |
| @Id private Long departmentId; | |
| public String getName() { | |
| return name; | |
| } | |
| public void setName(String name) { | |
| this.name = name; | |
| } | |
| public Long getDepartmentId() { | |
| return departmentId; | |
| } | |
| public void setDepartmentId(Long departmentId) { | |
| this.departmentId = departmentId; | |
| } | |
| @Override | |
| public int hashCode() { | |
| final int prime = 31; | |
| int result = 1; | |
| result = prime * result + (int) (departmentId ^ (departmentId >>> 32)); | |
| result = prime * result + ((name == null) ? 0 : name.hashCode()); | |
| return result; | |
| } | |
| @Override | |
| public boolean equals(Object obj) { | |
| if (this == obj) | |
| return true; | |
| if (obj == null) | |
| return false; | |
| if (getClass() != obj.getClass()) | |
| return false; | |
| EmbeddedIdExampleDepartment other = (EmbeddedIdExampleDepartment) obj; | |
| if (departmentId != other.departmentId) | |
| return false; | |
| if (name == null) { | |
| if (other.name != null) | |
| return false; | |
| } else if (!name.equals(other.name)) | |
| return false; | |
| return true; | |
| } | |
| } |
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| package com.example.demo; | |
| import jakarta.persistence.CascadeType; | |
| import jakarta.persistence.EmbeddedId; | |
| import jakarta.persistence.Entity; | |
| import jakarta.persistence.ManyToOne; | |
| import jakarta.persistence.MapsId; | |
| import org.yaml.snakeyaml.error.Mark; | |
| @Entity | |
| public class EmbeddedIdExampleEmployee { | |
| @EmbeddedId private EmbeddedIdExampleEmployeePK employeePk; | |
| @MapsId("departmentId")// | |
| @ManyToOne(cascade = CascadeType.ALL) private// | |
| EmbeddedIdExampleDepartment department; | |
| private String name; | |
| public EmbeddedIdExampleEmployeePK getEmployeePk() { | |
| return employeePk; | |
| } | |
| public void setEmployeePk(EmbeddedIdExampleEmployeePK employeePk) { | |
| this.employeePk = employeePk; | |
| } | |
| public EmbeddedIdExampleDepartment getDepartment() { | |
| return department; | |
| } | |
| public void setDepartment(EmbeddedIdExampleDepartment department) { | |
| this.department = department; | |
| } | |
| public String getName() { | |
| return name; | |
| } | |
| public void setName(String name) { | |
| this.name = name; | |
| } | |
| } |
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| package com.example.demo; | |
| import jakarta.persistence.Column; | |
| import jakarta.persistence.Embeddable; | |
| import java.io.Serial; | |
| import java.io.Serializable; | |
| @Embeddable | |
| public class EmbeddedIdExampleEmployeePK implements Serializable { | |
| @Serial private static final long serialVersionUID = 1L; | |
| @Column(nullable = false) private Long employeeId; | |
| @Column(nullable = false) private Long departmentId; | |
| public EmbeddedIdExampleEmployeePK() {} | |
| public EmbeddedIdExampleEmployeePK(Long employeeId, Long departmentId) { | |
| this.employeeId = employeeId; | |
| this.departmentId = departmentId; | |
| } | |
| public Long getEmployeeId() { | |
| return this.employeeId; | |
| } | |
| public void setEmployeeId(Long employeeId) { | |
| this.employeeId = employeeId; | |
| } | |
| public Long getDepartmentId() { | |
| return this.departmentId; | |
| } | |
| public void setDepartmentId(Long departmentId) { | |
| this.departmentId = departmentId; | |
| } | |
| @Override | |
| public int hashCode() { | |
| final int prime = 31; | |
| int result = 1; | |
| result = prime * result + (int) (departmentId ^ (departmentId >>> 32)); | |
| result = prime * result + (int) (employeeId ^ (employeeId >>> 32)); | |
| return result; | |
| } | |
| @Override | |
| public boolean equals(Object obj) { | |
| if (this == obj) | |
| return true; | |
| if (obj == null) | |
| return false; | |
| if (getClass() != obj.getClass()) | |
| return false; | |
| EmbeddedIdExampleEmployeePK other = (EmbeddedIdExampleEmployeePK) obj; | |
| if (departmentId != other.departmentId) | |
| return false; | |
| if (employeeId != other.employeeId) | |
| return false; | |
| return true; | |
| } | |
| } |
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| org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private com.example.demo.IdClassExampleDepartment com.example.demo.IdClassExampleEmployee.department] by reflection for persistent property [com.example.demo.IdClassExampleEmployee#department] : com.example.demo.IdClassExampleEmployeePK@3e1 | |
| at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:55) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.metamodel.mapping.internal.AbstractEmbeddableMapping.getValue(AbstractEmbeddableMapping.java:113) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.embeddable.internal.NonAggregatedIdentifierMappingInitializer.resolveInstanceSubInitializers(NonAggregatedIdentifierMappingInitializer.java:327) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.embeddable.internal.NonAggregatedIdentifierMappingInitializer.resolveInstance(NonAggregatedIdentifierMappingInitializer.java:314) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.embeddable.internal.NonAggregatedIdentifierMappingInitializer.resolveInstance(NonAggregatedIdentifierMappingInitializer.java:48) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.Initializer.resolveInstance(Initializer.java:149) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.entity.internal.EntitySelectFetchInitializer.resolveInstance(EntitySelectFetchInitializer.java:188) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.entity.internal.EntitySelectFetchInitializer.resolveInstance(EntitySelectFetchInitializer.java:44) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.Initializer.resolveInstance(Initializer.java:149) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.entity.internal.EntityInitializerImpl.resolveInstanceSubInitializers(EntityInitializerImpl.java:666) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.entity.internal.EntityInitializerImpl.resolveKey(EntityInitializerImpl.java:593) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.entity.internal.EntityInitializerImpl.resolveKey(EntityInitializerImpl.java:457) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.graph.entity.internal.EntityInitializerImpl.resolveKey(EntityInitializerImpl.java:97) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.internal.StandardRowReader.coordinateInitializers(StandardRowReader.java:235) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.internal.StandardRowReader.readRow(StandardRowReader.java:141) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.spi.ListResultsConsumer.read(ListResultsConsumer.java:249) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:201) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:35) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.doExecuteQuery(JdbcSelectExecutorStandardImpl.java:224) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.executeQuery(JdbcSelectExecutorStandardImpl.java:102) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.exec.spi.JdbcSelectExecutor.executeQuery(JdbcSelectExecutor.java:91) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.sql.exec.spi.JdbcSelectExecutor.list(JdbcSelectExecutor.java:165) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.lambda$new$1(ConcreteSqmSelectQueryPlan.java:152) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.withCacheableSqmInterpretation(ConcreteSqmSelectQueryPlan.java:442) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.performList(ConcreteSqmSelectQueryPlan.java:362) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.query.sqm.internal.QuerySqmImpl.doList(QuerySqmImpl.java:380) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.query.spi.AbstractSelectionQuery.list(AbstractSelectionQuery.java:143) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at org.hibernate.query.Query.getResultList(Query.java:120) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| at com.example.demo.DemoApplication.lambda$commandLineRunner$0(DemoApplication.java:41) ~[classes/:na] | |
| at org.springframework.transaction.support.TransactionOperations.lambda$executeWithoutResult$0(TransactionOperations.java:68) ~[spring-tx-6.2.8.jar:6.2.8] | |
| at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140) ~[spring-tx-6.2.8.jar:6.2.8] | |
| at org.springframework.transaction.support.TransactionOperations.executeWithoutResult(TransactionOperations.java:67) ~[spring-tx-6.2.8.jar:6.2.8] | |
| at com.example.demo.DemoApplication.lambda$commandLineRunner$1(DemoApplication.java:23) ~[classes/:na] | |
| at org.springframework.boot.SpringApplication.lambda$callRunner$5(SpringApplication.java:788) ~[spring-boot-3.5.3.jar:3.5.3] | |
| at org.springframework.util.function.ThrowingConsumer$1.acceptWithException(ThrowingConsumer.java:82) ~[spring-core-6.2.8.jar:6.2.8] | |
| at org.springframework.util.function.ThrowingConsumer.accept(ThrowingConsumer.java:60) ~[spring-core-6.2.8.jar:6.2.8] | |
| at org.springframework.util.function.ThrowingConsumer$1.accept(ThrowingConsumer.java:86) ~[spring-core-6.2.8.jar:6.2.8] | |
| at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:796) ~[spring-boot-3.5.3.jar:3.5.3] | |
| at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:787) ~[spring-boot-3.5.3.jar:3.5.3] | |
| at org.springframework.boot.SpringApplication.lambda$callRunners$3(SpringApplication.java:772) ~[spring-boot-3.5.3.jar:3.5.3] | |
| at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[na:na] | |
| at java.base/java.util.stream.SortedOps$SizedRefSortingSink.end(SortedOps.java:357) ~[na:na] | |
| at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:510) ~[na:na] | |
| at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] | |
| at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[na:na] | |
| at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[na:na] | |
| at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] | |
| at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[na:na] | |
| at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:772) ~[spring-boot-3.5.3.jar:3.5.3] | |
| at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) ~[spring-boot-3.5.3.jar:3.5.3] | |
| at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361) ~[spring-boot-3.5.3.jar:3.5.3] | |
| at org.springframework.boot.SpringApplication.run(SpringApplication.java:1350) ~[spring-boot-3.5.3.jar:3.5.3] | |
| at com.example.demo.DemoApplication.main(DemoApplication.java:15) ~[classes/:na] | |
| Caused by: java.lang.IllegalArgumentException: Can not set com.example.demo.IdClassExampleDepartment field com.example.demo.IdClassExampleEmployee.department to com.example.demo.IdClassExampleEmployeePK | |
| at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167) ~[na:na] | |
| at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171) ~[na:na] | |
| at java.base/jdk.internal.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58) ~[na:na] | |
| at java.base/jdk.internal.reflect.UnsafeObjectFieldAccessorImpl.get(UnsafeObjectFieldAccessorImpl.java:36) ~[na:na] | |
| at java.base/java.lang.reflect.Field.get(Field.java:425) ~[na:na] | |
| at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:51) ~[hibernate-core-6.6.18.Final.jar:6.6.18.Final] | |
| ... 52 common frames omitted |
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| package com.example.demo; | |
| import jakarta.persistence.Entity; | |
| import jakarta.persistence.Id; | |
| @Entity | |
| public class IdClassExampleDepartment { | |
| private String name; | |
| @Id private long departmentId; | |
| public String getName() { | |
| return name; | |
| } | |
| public void setName(String name) { | |
| this.name = name; | |
| } | |
| public long getDepartmentId() { | |
| return departmentId; | |
| } | |
| public void setDepartmentId(long departmentId) { | |
| this.departmentId = departmentId; | |
| } | |
| @Override | |
| public int hashCode() { | |
| final int prime = 31; | |
| int result = 1; | |
| result = prime * result + (int) (departmentId ^ (departmentId >>> 32)); | |
| result = prime * result + ((name == null) ? 0 : name.hashCode()); | |
| return result; | |
| } | |
| @Override | |
| public boolean equals(Object obj) { | |
| if (this == obj) | |
| return true; | |
| if (obj == null) | |
| return false; | |
| if (getClass() != obj.getClass()) | |
| return false; | |
| IdClassExampleDepartment other = (IdClassExampleDepartment) obj; | |
| if (departmentId != other.departmentId) | |
| return false; | |
| if (name == null) { | |
| if (other.name != null) | |
| return false; | |
| } else if (!name.equals(other.name)) | |
| return false; | |
| return true; | |
| } | |
| } |
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| package com.example.demo; | |
| import jakarta.persistence.CascadeType; | |
| import jakarta.persistence.Entity; | |
| import jakarta.persistence.Id; | |
| import jakarta.persistence.IdClass; | |
| import jakarta.persistence.ManyToOne; | |
| import org.yaml.snakeyaml.error.Mark; | |
| @IdClass(IdClassExampleEmployeePK.class) | |
| @Entity | |
| public class IdClassExampleEmployee { | |
| @Id private long empId; | |
| @Id @ManyToOne(cascade = CascadeType.ALL) private IdClassExampleDepartment department; | |
| private String name; | |
| public long getEmpId() { | |
| return empId; | |
| } | |
| public void setEmpId(long empId) { | |
| this.empId = empId; | |
| } | |
| public IdClassExampleDepartment getDepartment() { | |
| return department; | |
| } | |
| public void setDepartment(IdClassExampleDepartment department) { | |
| this.department = department; | |
| } | |
| public String getName() { | |
| return name; | |
| } | |
| public void setName(String name) { | |
| this.name = name; | |
| } | |
| } |
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| package com.example.demo; | |
| import java.io.Serial; | |
| import java.io.Serializable; | |
| public class IdClassExampleEmployeePK implements Serializable { | |
| @Serial private static final long serialVersionUID = 1L; | |
| private long empId; | |
| private long department; | |
| public IdClassExampleEmployeePK() {} | |
| public IdClassExampleEmployeePK(long empId, long department) { | |
| this.empId = empId; | |
| this.department = department; | |
| } | |
| public long getEmpId() { | |
| return this.empId; | |
| } | |
| public void setEmpId(long empId) { | |
| this.empId = empId; | |
| } | |
| public long getDepartment() { | |
| return this.department; | |
| } | |
| public void setDepartment(long department) { | |
| this.department = department; | |
| } | |
| @Override | |
| public int hashCode() { | |
| final int prime = 31; | |
| int result = 1; | |
| result = prime * result + (int) (department ^ (department >>> 32)); | |
| result = prime * result + (int) (empId ^ (empId >>> 32)); | |
| return result; | |
| } | |
| @Override | |
| public boolean equals(Object obj) { | |
| if (this == obj) { | |
| return true; | |
| } | |
| if (obj == null) { | |
| return false; | |
| } | |
| if (getClass() != obj.getClass()) { | |
| return false; | |
| } | |
| IdClassExampleEmployeePK other = (IdClassExampleEmployeePK) obj; | |
| if (department != other.department) { | |
| return false; | |
| } | |
| if (empId != other.empId) { | |
| return false; | |
| } | |
| return true; | |
| } | |
| } |
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| package com.example.demo; | |
| import jakarta.persistence.Entity; | |
| import jakarta.persistence.Id; | |
| import jakarta.persistence.ManyToOne; | |
| @Entity | |
| public class ReferencingIdClassExampleEmployee { | |
| @Id private long id; | |
| @ManyToOne public IdClassExampleEmployee employee; | |
| public long getId() { | |
| return id; | |
| } | |
| public void setId(long id) { | |
| this.id = id; | |
| } | |
| public IdClassExampleEmployee getEmployee() { | |
| return employee; | |
| } | |
| public void setEmployee(IdClassExampleEmployee employee) { | |
| this.employee = employee; | |
| } | |
| } |
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