nfsantos commented on code in PR #2113:
URL: https://github.com/apache/jackrabbit-oak/pull/2113#discussion_r1975195679
##########
oak-search/src/main/java/org/apache/jackrabbit/oak/plugins/index/search/Aggregate.java:
##########
@@ -588,37 +588,36 @@ public Matcher match(String name, NodeState nodeState) {
}
}
- public Collection<Matcher> nextSet() {
+ public List<Matcher> nextSet() {
checkArgument(status != Status.FAIL);
- if (status == Status.MATCH_FOUND){
+ if (status == Status.MATCH_FOUND) {
Aggregate nextAgg =
currentInclude.getAggregate(matchedNodeState);
- if (nextAgg != null){
+ if (nextAgg != null) {
int recursionLevel = aggregateStack.size() + 1;
- if (recursionLevel >=
rootState.rootAggregate.reAggregationLimit){
- return Collections.emptyList();
+ if (recursionLevel >=
rootState.rootAggregate.reAggregationLimit) {
+ return List.of();
}
List<Matcher> result = new
ArrayList<>(nextAgg.includes.size());
- for (Include i : nextAgg.includes){
- result.add(new Matcher(this, i, currentPath));
+ for (Include i : nextAgg.includes) {
+ result.add(new Matcher(this, i, currentPath));
}
return result;
}
- return Collections.emptyList();
+ return List.of();
Review Comment:
The readable improvement is mainly to use a uniform way of creating
immutable lists. I think this is nicer:
```
List.of()
List.of("a")
List.of(1,2,3)
```
than
```
Collections.emptyList()
List.of("a")
List.of(1,2,3)
```
The performance improvements of bimorphic vs polimorphic calls will likely
not be measurable in this case. However, as using `List.of` everywhere arguably
makes the code more consistent and simpler, any minor gains are just a welcome
extra.
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