StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POIs it necessary to set all the fields of the entity classes when using JPA to persist?
primarykey
Id
11010224
data
AcceptedAnswerId
11022483
AnswerCount
4
ClosedDate
CommentCount
8
CommunityOwnedDate
CreationDate
2012-06-13T07:39:18.137
FavoriteCount
1
LastActivityDate
2012-06-13T20:03:08.450
LastEditDate
2012-06-13T09:09:54.490
LastEditorUserId
1453008
OwnerUserId
1453008
ParentId
0
PostTypeId
1
Score
1
ViewCount
746
LastEditorDisplayName
text
Body
I am trying to insert into a table having 3 columns.The primary key of this table being foreign keys to many table has many one to many and many to many relations.While trying to insert i set all these columns but there were some others set methods which i do not use. When i did em.persist to this class it is throwing nullpointerexception. Any idea why is it doing so? Do i have to set other members of class also? the entity class is as follows <pre><code>/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package objectRelationalMapping; import java.io.Serializable; import java.util.List; import javax.persistence.*; import javax.validation.constraints.NotNull; import javax.validation.constraints.Size; import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.XmlTransient; /** * * @author jai */ @Entity @Table(name = "entitymain") @XmlRootElement @NamedQueries({ @NamedQuery(name = "Entitymain.findAll", query = "SELECT e FROM Entitymain e"), @NamedQuery(name = "Entitymain.findByUuid", query = "SELECT e FROM Entitymain e WHERE e.uuid = :uuid"), @NamedQuery(name = "Entitymain.findByEntityname", query = "SELECT e FROM Entitymain e WHERE e.entityname = :entityname")}) public class Entitymain implements Serializable { private static final long serialVersionUID = 1L; @Id @Basic(optional = false) @NotNull @Column(name = "uuid") private Integer uuid; @Size(max = 100) @Column(name = "entityname") private String entityname; @JoinTable(name = "successor", joinColumns = { @JoinColumn(name = "emmo_id", referencedColumnName = "uuid")}, inverseJoinColumns = { @JoinColumn(name = "successor_id", referencedColumnName = "uuid")}) @ManyToMany private List<Entitymain> entitymainList; @ManyToMany(mappedBy = "entitymainList") private List<Entitymain> entitymainList1; @JoinTable(name = "predecessor", joinColumns = { @JoinColumn(name = "emmo_id", referencedColumnName = "uuid")}, inverseJoinColumns = { @JoinColumn(name = "predecessor_id", referencedColumnName = "uuid")}) @ManyToMany private List<Entitymain> entitymainList2; @ManyToMany(mappedBy = "entitymainList2") private List<Entitymain> entitymainList3; @JoinTable(name = "operation", joinColumns = { @JoinColumn(name = "emmo_id", referencedColumnName = "uuid")}, inverseJoinColumns = { @JoinColumn(name = "operator_id", referencedColumnName = "operator_id")}) @ManyToMany private List<Operators> operatorsList; @JoinTable(name = "nodes", joinColumns = { @JoinColumn(name = "emmo_id", referencedColumnName = "uuid")}, inverseJoinColumns = { @JoinColumn(name = "node_id", referencedColumnName = "uuid")}) @ManyToMany private List<Entitymain> entitymainList4; @ManyToMany(mappedBy = "entitymainList4") private List<Entitymain> entitymainList5; @JoinTable(name = "entitytype", joinColumns = { @JoinColumn(name = "uuid", referencedColumnName = "uuid")}, inverseJoinColumns = { @JoinColumn(name = "oid", referencedColumnName = "uuid")}) @ManyToMany private List<Entitymain> entitymainList6; @ManyToMany(mappedBy = "entitymainList6") private List<Entitymain> entitymainList7; @JoinColumn(name = "entity_kid", referencedColumnName = "entity_kid") @ManyToOne private EntityKind entityKid; @OneToOne(cascade = CascadeType.ALL, mappedBy = "entitymain") private Association association; @OneToMany(cascade = CascadeType.ALL, mappedBy = "targetId") private List<Association> associationList; @OneToMany(cascade = CascadeType.ALL, mappedBy = "sourceId") private List<Association> associationList1; @OneToMany(cascade = CascadeType.ALL, mappedBy = "entitymain") private List<Features> featuresList; @OneToMany(cascade = CascadeType.ALL, mappedBy = "lmpId") private List<Connector> connectorList; @OneToMany(cascade = CascadeType.ALL, mappedBy = "entitymain") private List<Attributes> attributesList; @OneToMany(cascade = CascadeType.ALL, mappedBy = "entitymain1") private List<Attributes> attributesList1; public Entitymain() { } public Entitymain(Integer uuid) { this.uuid = uuid; } public Integer getUuid() { return uuid; } public void setUuid(Integer uuid) { this.uuid = uuid; } public String getEntityname() { return entityname; } public void setEntityname(String entityname) { this.entityname = entityname; } @XmlTransient public List<Entitymain> getEntitymainList() { return entitymainList; } public void setEntitymainList(List<Entitymain> entitymainList) { this.entitymainList = entitymainList; } @XmlTransient public List<Entitymain> getEntitymainList1() { return entitymainList1; } public void setEntitymainList1(List<Entitymain> entitymainList1) { this.entitymainList1 = entitymainList1; } @XmlTransient public List<Entitymain> getEntitymainList2() { return entitymainList2; } public void setEntitymainList2(List<Entitymain> entitymainList2) { this.entitymainList2 = entitymainList2; } @XmlTransient public List<Entitymain> getEntitymainList3() { return entitymainList3; } public void setEntitymainList3(List<Entitymain> entitymainList3) { this.entitymainList3 = entitymainList3; } @XmlTransient public List<Operators> getOperatorsList() { return operatorsList; } public void setOperatorsList(List<Operators> operatorsList) { this.operatorsList = operatorsList; } @XmlTransient public List<Entitymain> getEntitymainList4() { return entitymainList4; } public void setEntitymainList4(List<Entitymain> entitymainList4) { this.entitymainList4 = entitymainList4; } @XmlTransient public List<Entitymain> getEntitymainList5() { return entitymainList5; } public void setEntitymainList5(List<Entitymain> entitymainList5) { this.entitymainList5 = entitymainList5; } @XmlTransient public List<Entitymain> getEntitymainList6() { return entitymainList6; } public void setEntitymainList6(List<Entitymain> entitymainList6) { this.entitymainList6 = entitymainList6; } @XmlTransient public List<Entitymain> getEntitymainList7() { return entitymainList7; } public void setEntitymainList7(List<Entitymain> entitymainList7) { this.entitymainList7 = entitymainList7; } public EntityKind getEntityKid() { return entityKid; } public void setEntityKid(EntityKind entityKid) { this.entityKid = entityKid; } public Association getAssociation() { return association; } public void setAssociation(Association association) { this.association = association; } @XmlTransient public List<Association> getAssociationList() { return associationList; } public void setAssociationList(List<Association> associationList) { this.associationList = associationList; } @XmlTransient public List<Association> getAssociationList1() { return associationList1; } public void setAssociationList1(List<Association> associationList1) { this.associationList1 = associationList1; } @XmlTransient public List<Features> getFeaturesList() { return featuresList; } public void setFeaturesList(List<Features> featuresList) { this.featuresList = featuresList; } @XmlTransient public List<Connector> getConnectorList() { return connectorList; } public void setConnectorList(List<Connector> connectorList) { this.connectorList = connectorList; } @XmlTransient public List<Attributes> getAttributesList() { return attributesList; } public void setAttributesList(List<Attributes> attributesList) { this.attributesList = attributesList; } @XmlTransient public List<Attributes> getAttributesList1() { return attributesList1; } public void setAttributesList1(List<Attributes> attributesList1) { this.attributesList1 = attributesList1; } @Override public int hashCode() { int hash = 0; hash += (uuid != null ? uuid.hashCode() : 0); return hash; } @Override public boolean equals(Object object) { // TODO: Warning - this method won't work in the case the id fields are not set if (!(object instanceof Entitymain)) { return false; } Entitymain other = (Entitymain) object; if ((this.uuid == null && other.uuid != null) || (this.uuid != null && !this.uuid.equals(other.uuid))) { return false; } return true; } @Override public String toString() { return "objectRelationalMapping.Entitymain[ uuid=" + uuid + " ]"; } } </code></pre> for persisting i am doing this in a function.I have created objects for each and there is no compilation error.Also these variables are getting set . public class MapOntology { <pre><code>@PersistenceContext(unitName = "mmdb-ejbPU") private EntityManager em; Entitymain entitymain = new Entitymain(); EntityKind entitykind = new EntityKind(); EntityKindFacade ekf; public void persistOntology(EntityOntologyBeans objOntology) { //Integer uuid = new Integer(objEntityOntologyBeans.getUuid().getUuid()); // entitykind.setEntityKid(ekf.getkindId(objOntology.getEntitykind())); // em.flush(); entitymain.setUuid(1); entitykind.setEntityKid(2); entitymain.setEntityname(objOntology.getEntityname()); entitymain.setEntityKid(entitykind); em.getTransaction().begin(); em.persist(entitymain); em.getTransaction().commit(); } </code></pre> it is giving null pointer exception at the last line of the above function. Please help Stack trace is as follows <pre><code>WARNING: EJB5184:A system exception occurred during an invocation on EJB InsertTransaction, method: public java.lang.String transactions.InsertTransaction.insertOntology() WARNING: javax.ejb.EJBException at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5215) at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5113) at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4901) at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045) at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994) at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222) at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88) at $Proxy445.insertOntology(Unknown Source) at transactions.__EJB31_Generated__InsertTransaction__Intf____Bean__.insertOntology(Unknown Source) at servlet.NewServlet.processRequest(NewServlet.java:63) at servlet.NewServlet.doPost(NewServlet.java:101) at javax.servlet.http.HttpServlet.service(HttpServlet.java:688) at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) at com.sun.grizzly.ContextTask.run(ContextTask.java:71) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) at java.lang.Thread.run(Thread.java:722) Caused by: java.lang.NullPointerException at mappingProcess.MapOntology.persistOntology(MapOntology.java:69) at transactions.InsertTransaction.insertOntology(InsertTransaction.java:49) 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.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052) at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124) at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5388) at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571) at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162) at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144) at sun.reflect.GeneratedMethodAccessor159.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:861) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:370) at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5360) at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348) at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214) ... 31 more SEVERE: javax.ejb.EJBException at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5215) at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5113) at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4901) at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045) at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994) at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222) at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88) at $Proxy445.insertOntology(Unknown Source) at transactions.__EJB31_Generated__InsertTransaction__Intf____Bean__.insertOntology(Unknown Source) at servlet.NewServlet.processRequest(NewServlet.java:63) at servlet.NewServlet.doPost(NewServlet.java:101) at javax.servlet.http.HttpServlet.service(HttpServlet.java:688) at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) at com.sun.grizzly.ContextTask.run(ContextTask.java:71) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) at java.lang.Thread.run(Thread.java:722) Caused by: java.lang.NullPointerException at mappingProcess.MapOntology.persistOntology(MapOntology.java:69) at transactions.InsertTransaction.insertOntology(InsertTransaction.java:49) 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.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052) at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124) at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5388) at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571) at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162) at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144) at sun.reflect.GeneratedMethodAccessor159.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:861) at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:370) at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5360) at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348) at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214) ... 31 more SEVERE: at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5215) SEVERE: at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5113) SEVERE: at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4901) SEVERE: at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045) SEVERE: at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994) SEVERE: at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222) SEVERE: at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88) SEVERE: at $Proxy445.insertOntology(Unknown Source) SEVERE: at transactions.__EJB31_Generated__InsertTransaction__Intf____Bean__.insertOntology(Unknown Source) SEVERE: at servlet.NewServlet.processRequest(NewServlet.java:63) SEVERE: at servlet.NewServlet.doPost(NewServlet.java:101) SEVERE: at javax.servlet.http.HttpServlet.service(HttpServlet.java:688) SEVERE: at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) SEVERE: at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542) SEVERE: at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) SEVERE: at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) SEVERE: at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) SEVERE: at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) SEVERE: at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) SEVERE: at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) SEVERE: at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) SEVERE: at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) SEVERE: at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) SEVERE: at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849) SEVERE: at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746) SEVERE: at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045) SEVERE: at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228) SEVERE: at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) SEVERE: at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) SEVERE: at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) SEVERE: at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) SEVERE: at com.sun.grizzly.ContextTask.run(ContextTask.java:71) SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) SEVERE: at java.lang.Thread.run(Thread.java:722) SEVERE: Caused by: java.lang.NullPointerException SEVERE: at mappingProcess.MapOntology.persistOntology(MapOntology.java:69) SEVERE: at transactions.InsertTransaction.insertOntology(InsertTransaction.java:49) SEVERE: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) SEVERE: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) SEVERE: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) SEVERE: at java.lang.reflect.Method.invoke(Method.java:601) SEVERE: at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052) SEVERE: at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124) SEVERE: at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5388) SEVERE: at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619) SEVERE: at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) SEVERE: at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571) SEVERE: at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162) SEVERE: at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144) SEVERE: at sun.reflect.GeneratedMethodAccessor159.invoke(Unknown Source) SEVERE: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) SEVERE: at java.lang.reflect.Method.invoke(Method.java:601) SEVERE: at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:861) SEVERE: at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) SEVERE: at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:370) SEVERE: at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5360) SEVERE: at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348) SEVERE: at com.sun.ejb.containers.EJB </code></pre> LocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214) SEVERE: ... 31 more
Tags
<java><jpa><insert><nullpointerexception><persist>
Title
Is it necessary to set all the fields of the entity classes when using JPA to persist?
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USjairaj
UserOwnerUserId
1. USjairaj
plurals
PostLinksPostIdRelatedPostId
1. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
3. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 POIs it necessary to set all the fields of the entity classes when using JPA to persist?
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 POIs it necessary to set all the fields of the entity classes when using JPA to persist?
 UserUserId
 USPetar Minchev
 VoteTypeVoteTypeId
 VTFavorite
3. VO
 singulars
 PostPostId
 POIs it necessary to set all the fields of the entity classes when using JPA to persist?
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.