Moja metoda przyjmuje datę i porównuję ją w specyfikacji
public static Specification<MovieEntity> getFindPredicate(
final Date fromDate
) {
return (final Root<MovieEntity> root, final CriteriaQuery<?> cq, final CriteriaBuilder cb) -> {
final List<Predicate> predicates = new ArrayList<>();
if (fromDate != null) {
final Join<MovieEntity, MovieReleaseDate> listReleaseDates = root.join(MovieEntity_.releaseDates);
final List<Predicate> orPredicates =
Stream.of(fromDate)
.map(releaseDate -> cb.greaterThanOrEqualTo(listReleaseDates.get(MovieReleaseDate_.date), fromDate))
.collect(Collectors.toList());
predicates.add(cb.or(orPredicates.toArray(new Predicate[orPredicates.size()])));
}
return cb.and(predicates.toArray(new Predicate[predicates.size()]));
};
}
Jednak lambda wyrzuca mi wyjątek (https://zapodaj.net/38349010fb814.png.html) (Z czerwonym tłem debugowany fragment)
java.lang.NullPointerException: null
at org.eclipse.persistence.internal.jpa.querydef.FromImpl.get(FromImpl.java:274) ~[org.eclipse.persistence.jpa-2.7.0.jar:na]
at com.core.jpa.specifications.MovieSpecs.lambda$null$0(MovieSpecs.java:48) ~[classes/:na]
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_144]
at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:419) ~[na:1.8.0_144]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_144]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_144]
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_144]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_144]
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_144]
Czy ta konstrukcja lambdy jest błędna czy o co chodzi?
