So this is driving me just crazy, I'm calling the get function on a map and it always returns null. I have verified that the map indeed contains my key, and that the entry indeed has a non-null value. I also verified that the hashCode and the equals functions are working properly between the entity I try to get as a key, and the entity that is the key.
Here is my test code:
Code:
System.out.println("=============\nTesting Load:");
reset();
UserEntity user = makeUser();
String loginName = user.getUserInfo().getLoginName();
addMeasurementData(user);
MeasurementTypeEntity type = user.getMeasurements().keySet().iterator().next();
Assert.assertTrue("Type is null.",type!=null);
Assert.assertTrue("Type is not a persistent/detached entity.",type.getId()>0);
Date d = user.getMeasurements(type).getMeasurements().keySet().iterator().next();
Assert.assertTrue(user.getId()==null || user.getId()<0);
// type should already be persistent
Assert.assertTrue(type.getId()!=null && type.getId()>=0);
try {
user.save(true);
} catch (ConflictException e) {
Assert.fail("Unexpected exception saving user.");
e.printStackTrace();
}
String email = user.getUserInfo().getEmailAddress();
Long id = user.getId();
user = null;
user = UserEntity.getById(id,true);
Assert.assertTrue("user gotten by id is null: "+(user==null)+", or id does not match: "+
id+"!="+(user==null ? "n/a":user.getId()),user != null && user.getId().equals(id));
// make sure that child data was persisted too.
Assert.assertTrue(user.getId()!=null && user.getId()>=0);
// ===========================
// THIS IS WHERE THE PROBLEM STARTS:
// ===========================
Map<MeasurementTypeEntity,MeasurementsEntity> mmss = user.getMeasurements();
System.out.println("type hash code is "+type.hashCode());
Iterator<MeasurementsEntity> iter = mmss.values().iterator();
int i = 0;
while (iter.hasNext()) {
MeasurementTypeEntity t = iter.next().getType();
System.out.println("\t\t-- value: "+t+", hc="+t.hashCode()+", eq="+t.equals(type)+", contains: "+mmss.containsKey(t));
i++;
}
System.out.println("There were "+i+" values.");
Iterator<MeasurementTypeEntity> iter2 = mmss.keySet().iterator();
int j = 0;
while (iter2.hasNext()) {
MeasurementTypeEntity t = iter2.next();
System.out.println("\t\t-- key: "+t+", hc="+t.hashCode()+", eq="+t.equals(type)+", contains: "+mmss.containsKey(t));
j++;
}
System.out.println("There were "+j+" keys.");
System.out.println(mmss.keySet().contains(type));
MeasurementsEntity measurements = user.getMeasurements(type);
Assert.assertTrue("Measurements returned null for type: "+type.getName(),measurements!=null);
Here is the console output:
Quote:
type hash code is 2017741059
-- value: weight (lb), hc=2017741059, eq=true, contains: false
There were 1 values.
-- key: weight (lb), hc=2017741059, eq=true, contains: false
There were 1 keys.
false
From the console output you can see that the key in my map has the same hashcode as the one I try using to get it, and that the equals function returns true between the key and my argument. You can also see that the map's contains function returns false even for keys taken straight from it! I did not write the PersistentMap class, it's hibernate's, so why on earth is this happening?
Here is the code for the user.getMeasurements(type) function:
Code:
public MeasurementsEntity getMeasurements(MeasurementTypeEntity type) {
if (this.measurements==null)
return null;
if (type == null)
throw new NullPointerException("Must specify a type of measurements to get.");
return measurements.get(type);
}
Here is my junit exception from the last line of the code:
Quote:
junit.framework.AssertionFailedError: Measurements returned null for type: weight (lb)
at junit.framework.Assert.fail(Assert.java:47)
at junit.framework.Assert.assertTrue(Assert.java:20)
at com.knapptech.fitnesstracker.entities.UserEntityTest.testLoad(UserEntityTest.java:203)
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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:35)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:146)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:97)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.maven.surefire.booter.ProviderFactory$ClassLoaderProxy.invoke(ProviderFactory.java:103)
at $Proxy0.invoke(Unknown Source)
at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:145)
at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcess(SurefireStarter.java:87)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:69)
Why is this happening? How can I fix this?
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