Use Collector to merge multiple JSON objects into onejava/data/merge-json-objectTurn Stream<JsonObject> to single JsonObject

1static Collector<JsonElement, ?, JsonObject> collectAsJsonObject() {
2    return Collector.of(
3            JsonObject::new,
4            (obj, element) -> {
5                if (element.isJsonObject()) {
6                    for (Map.Entry<String, JsonElement> key : element.getAsJsonObject().entrySet()) {
7                        obj.add(key.getKey(), key.getValue());
8                    }
9                }
10            },
11            (obj1, obj2) -> {
12                for (Map.Entry<String, JsonElement> key : obj2.entrySet()) {
13                    obj1.add(key.getKey(), key.getValue());
14                }
15                return obj1;
16            }
17    );
18}