1

I have Optional object 

Optional<Instrument> instrument = instrumentService.findOne(id);

And i have two scenario. First return ResponseEntity.ok if object is present and second is return ResponseEntity.noContent().build(). I have function 

instrument.map(instrument1 -> {
            return ResponseEntity.ok(instrumentMapper.toDto(instrumentRepository.save(instrument1)));
        })
        .//return noContent here;

What i need to write after dot to return necessary part?

Andronicus
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Krazim00da
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  • use `orElseGet(() -> ResponseEntity.no Content().build())` – qutax Mar 26 '20 at 09:53
  • you need to start writing with the API that you want to use `orElse` first and then see what arguments does it accept as values – Naman Mar 26 '20 at 10:02

1 Answers1

1

You can use orElse:

return instrument
    .map(instrument1 -> instrument1 -> { 
        instrument1.setValue(value); 
        return ResponseEntity.ok(instrumentMapper.toDto(instrumentRepository.save(instrument1))); })
    .orElse(ResponseEntity.noContent().build());

And for further building the default value:

return instrument
    .map(instrument1 -> instrument1 -> { 
        instrument1.setValue(value); 
        return ResponseEntity.ok(instrumentMapper.toDto(instrumentRepository.save(instrument1))); })
    .orElseGet(() -> {
        Intrument inst = new Intrument(); 
        inst.setTitle("Not found"); 
        return inst; 
    });
Andronicus
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