CODEWITHSUNDEEP
javajava-stream
gamerounet
gamerounet

Reputation: 299

Check if a List<String> contains all element from a List<Object> using stream

I have 2 lists:

List<String> authorizedList ; // ["11","22","33"]
List<MySerial> serials; // [Myserial1,Myserial2,Myserial3] =>

MySerial are object with 2 parameters, Myserial(String serial, String name)

I want to check if all serial from serials are in authorizedList using stream but I'm new using it.

if (!serials.stream().map(MySerial::getSerial).anyMatch(authorizedList::equals)) {
    throw new UnauthorizedException();
}

But it always throw exception.

Upvotes: 0

Views: 1011

Answers (1)

Evdzhan Mustafa
Evdzhan Mustafa

Reputation: 3735

Change authorizedList::equals to authorizedList::contains.

Also you can invert the if statement from anyMatch to allMatch.

E.g. after the suggestions you should have:

if (!serials.stream().map(MySerial::getSerial).allMatch(authorizedList::contains)) {
    throw new UnauthorizedException();
}

Upvotes: 5

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