Does stream api follow chain of responsibilities or decorator pattern in Java?

Asked Dec 15 '20 at 21:09

Active Dec 18 '20 at 16:39

Viewed 277 times

so the question is does stream api follow Chain of responsibilities or Decorator pattern in Java? Foe example

IntStream stream = IntStream.range(0, 100).filter(i -> i % 2 == 0).boxed();

Are we decorating IntStream with new functionallity thus creating decorated IntStream? If this is the case then is it an example of Decorator pattern? Or do we perform chain of responsibilities when collecting it to list when calling

strem.collect(Collectors.toList());

edited Dec 18 '20 at 16:39

Mark Rotteveel

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asked Dec 15 '20 at 21:09

Blogger 2015

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May I ask, why do you even care for the terminology here? It is not always meaningful to force terminology on something. – Zabuzard Dec 15 '20 at 21:21
I ask because I want to understand things – Blogger 2015 Dec 15 '20 at 21:36
Neither. Streams implement the _Iterator_ design pattern. – jaco0646 Dec 16 '20 at 21:44
Does this answer your question? [Are Java Streams implementations of Iterator Design Pattern?](https://stackoverflow.com/questions/61957343/are-java-streams-implementations-of-iterator-design-pattern) – jaco0646 Dec 16 '20 at 21:45
@jaco0646, no it doesn't – Blogger 2015 Dec 17 '20 at 13:40

Does stream api follow chain of responsibilities or decorator pattern in Java?

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