Problem with @Embeddable with Jinq

[ext.rickard...@tieto.com]

Hi

Do Jinq support @Embeddable classes for JPA?

I have tried to use them, but can't get it to work, here is the example in question (stripped of all none relevant code)

@Entity

public class Outer implements Serializable {

@Embedded

private Inner inner;

public Inner getInner(){

return inner;

}

}

@Embeddable

public class Inner implements Serializable {

private String sort;

public String getSort(){

return sort;

}

}

streamAll(em, Outer.class).sortedDescendingBy(o -> o.getInner().getSort());

The errors i get is:

java.lang.IllegalArgumentException: Could not analyze lambda code

...

Caused by: org.objectweb.asm.tree.analysis.AnalyzerException: Unknown method package/Inner:getSort()Ljava/lang/String; encountered

...

Doing the query in JPQL works perfectly (SELECT A FROM Outer A ORDER BY A.inner.sort DESC)

I really like the concept of Jinq moving from a C# world with Linq to Java, so i really hope you find the time, and get some support to continue developing Jinq.

[Jinq]

@Embedded is not supported at the moment. Give me a couple of days to figure it out.

[Beniamin Dziurdza]

Does it work nowadays?

[Jinq]

Yes

https://github.com/my2iu/Jinq/blob/f313e34aaf6da4edec2d2d4690ed269c172d64cd/jinq-jpa/test/org/jinq/jpa/JinqJPATypesTest.java#L602

[Beniamin Dziurdza]

Unfortunately, translation of @Embeddable that has nullable field(s) can lead to SQL query containing "field = null" instead of "field is NULL" when using lambdas such:

e -> e.creditCard.equals( creditCardExampleWithSomeNullField )  // <- still great this is greatly supported by Jjinq :)

Any solution? (I know, one can check all attributes of Embeddable instead of using .equals... but it is much more verbose and harder to maintain - refactorings etc.)

Best regards,

Beniamin

W dniu czwartek, 18 października 2018 18:52:42 UTC+2 użytkownik Jinq napisał:

Yes

https://github.com/my2iu/Jinq/blob/f313e34aaf6da4edec2d2d4690ed269c172d64cd/jinq-jpa/test/org/jinq/jpa/JinqJPATypesTest.java#L602

[Beniamin Dziurdza]

Ideally, I would like to query by example of @Embaddable instance... Currently it is not straightforward... Similiar to the above issue is that one cannot pass null to equals:

e -> e.creditCard.equals( nullCreditCardInstance )   // here nullCreditCardInstance == null;

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