'Kotlin : Type mismatch when class implement Serializable

I have a project that was written in both Java & Kotlin (forgive my very newbie kotlin understanding)

The class I would like to serialize has implemented the Serializable interface.

Error Message:

Type mismatch: inferred type is EntityRelationship but Serializable! was expected

public class EntityRelationship implements Serializable {
    @NonNull
    private Relationship relationship;
    @Builder.Default
    private List<Relationship> childRelationship = new ArrayList<>();
}

When I tried to serialize it

val entityRelationship: EntityRelationship = relationshipList.get(0)

val serializedResponse = SerializationUtils.serialize(entityRelationship) //<--Trouble in this line

I do not understand why type mismatch happen here, because entityRelationship already implement serializable interface. Even if I enforce

val entityRelationship: Serializable = relationshipList.get(0)

p.s: relationshipList is a List

I still get the same error. My zero understanding regards to kotlin forbid me to ping the issue. Any pointer is appreciated.

kotlin type-mismatch

Solution 1:^[1]

First of all "Relationship" class should be implemented Serializable as well. And you may need to make your serialize function generic and cast your class in SerializationUtils.

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Solution	Source
Solution 1	Berkay Kireçci

'Kotlin : Type mismatch when class implement Serializable

Solution 1:[1]

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Related Questions

Solution 1:^[1]