Check if object is equal but compare only keys that defined in both objects

Question

i have this situation:

Map<String, Object> origin = new HashMap<String, Object>();
origin.put("name", "client");
origin.put("website", "https://google.com");
origin.put("settings", new HashMap<String, Object>());

Map<String, Object> other = new HashMap<String, Object>();
other.put("id", "client");
other.put("name", "client");
other.put("website", "https://google.com");
other.put("settings", new HashMap<String, Object>());


if(Objects.equals(origin, other)) {
  System.out.println("TRUE");
} else {
  System.out.println("FALSE");
}

The result is false, because origin does not contain id.

origin is always a subset of other. Both Map can contains nested maps and lists.

Is there a smart java operation which checks if the values in origin are the same in other and give true back? Or do I had to iterate through the maps and compare each key?

You have to do it manually

azro
– azro

2020-06-07 08:28:10 +00:00
Commented Jun 7, 2020 at 8:28 — azro
– azro, Commented Jun 7, 2020 at 8:28

azro · Accepted Answer · 2020-06-07 08:31:01Z

1

You mean something like : is origin is a submap of other, verifying that all mappings from origin are in other but you have missing items but don't care.

So fo each key of origin check if values are same in both Maps

boolean subMap = origin.keySet().stream().allMatch(key -> origin.get(key).equals(other.get(key)));

if (subMap) {
    System.out.println("TRUE");
} else {
    System.out.println("FALSE");
}

answered Jun 7, 2020 at 8:31

azro

54.2k9 gold badges39 silver badges75 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

user4910279 · Accepted Answer · 2020-06-07 09:18:28Z

0

Try this.

boolean result = origin.keySet().stream()
    .allMatch(key -> !other.containsKey(key) || origin.get(key).equals(other.get(key)));

answered Jun 7, 2020 at 9:18

user4910279

Collectives™ on Stack Overflow

Check if object is equal but compare only keys that defined in both objects

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related