I have a trimmed down version of my code to illustrate the issue. Here’s the compilation error I’m getting: My code: How would you fix the code to remove the error? Thank you! Answer The fact that you have applied instanceof check in the filter() doesn’t change the type of the stream, it rem…
Tag: predicate
Unable to get my head around Predicate isEqual method
In Java docs it is given – In https://www.geeksforgeeks.org/java-8-predicate-with-examples/ it is given – isEqual(Object targetRef) : Returns a predicate that tests if two arguments are equal according to Objects.equals(Object, Object). static Predicate isEqual(Object targetRef) Returns a predicat…
Java – How do I create Predicates as Arrays.asList() arguments?
I have a few predicates that I want to put in a list so I can then call stream().noneMatch() on my list. I successfully did this by creating named Predicates but how can I create them within an Arrays.asList()’s argument list? Here’s the working code that I’d like to convert: I’d expec…
Java Predicates with distributive law
I have a boolean Java statement that is structured like follows: return A AND (B OR C OR D) In Java: I wanted to reformulate this by using chained predicates, but it seems like I have to use the distributive law of Boolean algebra in order to make it work: (A AND B) OR (A AND C) OR (A AND
How to join 3 table using hibernate criteria?
I have three tables. parent parent_child_mapping child I want to join the 3 tables & filter by child name using ‘CriteriaBuilder’ & ‘Predicate’. How can i implement the below sql query using ‘CriteriaBuilder’ & ‘Predicate’. Parent entity Parent child…
Spring Boot Jpa specification Set Enums IN Set Enums
Hi I want filter restaurant by type using Specification, but I get error: Parameter value [SUSHI] did not match expected type [java.util.Set (n/a)] How Can I comare List enums to list enums ? :/ My specification file: Restaurant model: Restaurant category: Answer Had the same problem and this question helped …