jpountz commented on a change in pull request #311:
URL: https://github.com/apache/lucene/pull/311#discussion_r712832329
##########
File path:
lucene/core/src/java/org/apache/lucene/codecs/perfield/PerFieldPostingsFormat.java
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@@ -340,9 +342,15 @@ public FieldsReader(final SegmentReadState readState)
throws IOException {
this.segment = readState.segmentInfo.name;
}
+ private static List<String> buildFieldList(Map<String, FieldsProducer>
fields) {
+ List<String> fieldList = new ArrayList<>(fields.keySet());
+ fieldList.sort(null);
+ return Collections.unmodifiableList(fieldList);
+ }
Review comment:
nit: `buildFieldList` is a bit abstract and if I was reading a call site
of this method I'd need to look at its definition to understand what it does
exactly. Maybe call it `createSortedCopy(Collection<String>)` instead and fix
call sites to pass the keyset to make the code easier to read?
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