Cannot convert from Stream<T> to boolean

Question

I'm trying to filter a list of objects say BOLReference based on a key which is present in the inner object of one of the List of Objects of this BOLReference.

List<BOLReference> bolRef = complianceMongoTemplate.find(findQuery, BOLReference.class);

Optional<BOLReference> bref = bolRef.stream().filter(br -> br.getWorkflowExceptions().stream()
                        .filter(bk -> bk.getBusinessKeyValues().get(businessKey)
                        .equalsIgnoreCase("ABCD1234"))).findFirst();

While doing so I'm getting error as :

Cannot convert from Stream<WorkFlowExceptions> to boolean

My BOLReference looks like below:

private String ediTransmissionId;
private List<WorkflowExceptions> workflowExceptions;

And my WorkflowExceptions looks like:

private String category;
private Map<String,String> businessKeyValues;

Answer 1

Optional<BOLReference> bref = bolRef.stream()
    .filter(br -> 
        br.getWorkflowExceptions().stream()
            .anyMatch(bk ->
                bk.getBusinessKeyValues().get(businessKey)
                    .equalsIgnoreCase("ABCD1234")))
    .findFirst();

Failing anyMatch I think.