MapJoin.key() produces unusable Path object
Description
I'm using MapJoin like this:
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CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<Data> cq = cb.createQuery(TxData.class);
Root<Data> obj = cq.from(Data.class);
cq.select(obj);
MapJoin<Data, String, OtherClass> mj = obj.joinMap("other");
Path<String> otherKey = mj.key();
Path<OtherClass> otherItem = mj.get("item");
cq.where(cb.and(
cb.equal(otherKey,"key"),
cb.equal(otherItem , "value")));
TypedQuery<Data> tq = em.createQuery(cq);The em.createQuery(cq) call throws a NullPointerException:
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java.lang.NullPointerException
at org.hibernate.jpa.criteria.path.AbstractPathImpl.getPathIdentifier(AbstractPathImpl.java:92)
at org.hibernate.jpa.criteria.path.AbstractPathImpl.render(AbstractPathImpl.java:252)
at org.hibernate.jpa.criteria.predicate.ComparisonPredicate.render(ComparisonPredicate.java:187)
at org.hibernate.jpa.criteria.predicate.AbstractSimplePredicate.render(AbstractSimplePredicate.java:65)
at org.hibernate.jpa.criteria.predicate.CompoundPredicate.render(CompoundPredicate.java:186)
at org.hibernate.jpa.criteria.predicate.CompoundPredicate.render(CompoundPredicate.java:132)
at org.hibernate.jpa.criteria.predicate.CompoundPredicate.render(CompoundPredicate.java:122)
at org.hibernate.jpa.criteria.QueryStructure.render(QueryStructure.java:262)
at org.hibernate.jpa.criteria.CriteriaQueryImpl.interpret(CriteriaQueryImpl.java:312)
at org.hibernate.jpa.criteria.compile.CriteriaCompiler.compile(CriteriaCompiler.java:147)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:736)The same code works fine on EclipseLink.
Seems that the problem is in the MapKeyHelpers.MapKeySource constructor, which calls the super constructor from AbstractPathSource with a null pathSource argument:
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super( criteriaBuilder, javaType, null );This way, the pathSource is initialized to null. Then, AbstractPathSource's getPathIdentifier() will always throw a NPE.
Environment
None
Status
Assignee
Brett Meyer
Reporter
Peter Halicky
Fix versions
Labels
None
backPortable
None
Suitable for new contributors
None
Requires Release Note
None
backportDecision
None
Components
Affects versions
4.3.0.Final
Priority
Major