It appears that these two statements work individually but not
together.
@Persistent
private ContactInfo manager;
@Persistent
private List<ContactInfo> staff = new ArrayList<ContactInfo>();
Change either @Persistent to @NotPersistent and the unit test
succeeds.
SDK: appengine-java-sdk-1.2.5
****************** Stack Trace
***************************************************
java.lang.ClassCastException: oid is not instanceof
javax.jdo.identity.ObjectIdentity
at roster.ContactInfo.jdoCopyKeyFieldsFromObjectId(ContactInfo.java)
at
org.datanucleus.store.mapped.mapping.PersistenceCapableMapping.setObjectAsValue
(PersistenceCapableMapping.java:657)
at
org.datanucleus.store.mapped.mapping.PersistenceCapableMapping.setObject
(PersistenceCapableMapping.java:364)
at org.datanucleus.store.appengine.DatastoreRelationFieldManager
$1.setObjectViaMapping(DatastoreRelationFieldManager.java:132)
at org.datanucleus.store.appengine.DatastoreRelationFieldManager
$1.apply(DatastoreRelationFieldManager.java:108)
at
org.datanucleus.store.appengine.DatastoreRelationFieldManager.storeRelations
(DatastoreRelationFieldManager.java:80)
at
org.datanucleus.store.appengine.DatastoreFieldManager.storeRelations
(DatastoreFieldManager.java:795)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertPostProcess
(DatastorePersistenceHandler.java:288)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObjects
(DatastorePersistenceHandler.java:241)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject
(DatastorePersistenceHandler.java:225)
at org.datanucleus.state.JDOStateManagerImpl.internalMakePersistent
(JDOStateManagerImpl.java:3185)
at org.datanucleus.state.JDOStateManagerImpl.makePersistent
(JDOStateManagerImpl.java:3161)
at org.datanucleus.ObjectManagerImpl.persistObjectInternal
(ObjectManagerImpl.java:1298)
at org.datanucleus.ObjectManagerImpl.persistObject
(ObjectManagerImpl.java:1175)
at org.datanucleus.jdo.JDOPersistenceManager.jdoMakePersistent
(JDOPersistenceManager.java:669)
at org.datanucleus.jdo.JDOPersistenceManager.makePersistent
(JDOPersistenceManager.java:694)
at testing.TestContactInfo.testTwoRelationShips(TestContactInfo.java:
75)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run
(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run
(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests
(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests
(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run
(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main
(RemoteTestRunner.java:197)
*************************ContactInfo.java *************************
import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.IdentityType;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;
import com.google.appengine.api.datastore.Key;
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class ContactInfo {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key contactInfoKey;
@Persistent
private String firstName;
@Persistent
private String lastName;
@Persistent
private String phoneNumber;
@Persistent
private String emailAddress;
public ContactInfo(String firstName, String lastName, String
phoneNumbers,
String emailAddresses) {
this.firstName = firstName;
this.lastName = lastName;
this.phoneNumber = phoneNumber;
this.emailAddress = emailAddress;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getPhoneNumber() {
return phoneNumber;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
public Key getContactInfoId(){
return contactInfoKey;
}}
************************* Two Relationship
*******************************
import java.util.ArrayList;
import java.util.List;
import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.IdentityType;
import javax.jdo.annotations.NotPersistent;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class TwoRelationship {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Long id;
@Persistent
private ContactInfo manager;
@Persistent
private List<ContactInfo> staff = new ArrayList<ContactInfo>();
public ContactInfo getManager() {
return manager;
}
public void setManager(ContactInfo manager) {
this.manager = manager;
}
public List<ContactInfo> getStaff() {
return staff;
}
public void setStaff(List<ContactInfo> staff) {
this.staff = staff;
}
}
************************PMF.java ***************************
import javax.jdo.JDOHelper;
import javax.jdo.PersistenceManagerFactory;
public class PMF {
private static final PersistenceManagerFactory pmfInstance =
JDOHelper.getPersistenceManagerFactory("transactions-
optional");
private PMF() {}
public static PersistenceManagerFactory get() {
return pmfInstance;
}
}
************************** unit test **************************
public void testTwoRelationShips(){
ContactInfo boss = new ContactInfo("Walt","Disney", "", "");
ContactInfo worker = new ContactInfo("Mickey","Mouse", "",
"");
TwoRelationship tester = new TwoRelationship();
tester.setManager(boss);
tester.getStaff().add(worker);
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
pm.makePersistent(tester);
}catch(Exception e){
e.printStackTrace();
}
finally {
pm.close();
}
}
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