Lucene searchAfter返回与先前查询相同的结果

Question

我刚刚发现 Lucene 支持使用searchAfter方法进行分页，因此我将其添加到我的实现中。不幸的是，它返回与前一个查询相同的结果，我不明白为什么。

基本上我正在做的是调用我的search方法并存储Query返回的ScoreDoc和最后collector.topDocs()。然后，当用户想要加载下一页时，我会调用searcher.searchAfter(previousResult, previousQuery, MAX_HITS)，但我会收到与运行searcher.search(query, collector)时收到的相同的结果。

请注意，我每页返回15个文档，我的查询有32个匹配，所以我希望它至少有2页。

以下是代码：

private Query previousQuery;
private ScoreDoc previousResult;
private float previousMaxScore;

private ScoreDoc[] search(String query) throws ParseException, IOException {
    Query q = parser.parse(query);
    TopScoreDocCollector collector = TopScoreDocCollector.create(MAX_HITS_PER_PAGE);
    searcher.search(q, collector);
    TopDocs result = collector.topDocs();
    // Let's normalize scores
    for (ScoreDoc scoreDoc : result.scoreDocs) {
        scoreDoc.score /= result.getMaxScore();
    }
    // If the query had some results then we save the last one to support paging
    if (collector.getTotalHits() > 0) {
        previousQuery = q;
        previousResult = result.scoreDocs[result.scoreDocs.length - 1];
        previousMaxScore = result.getMaxScore();
    }        
    return result.scoreDocs;
}

private ScoreDoc[] searchNextPage() throws IOException {
    // previosuResult is CORRECT, it's the last one from the previous query so it's not part of the issue.
    TopDocs result = searcher.searchAfter(previousResult, previousQuery, MAX_HITS_PER_PAGE);        
    // Let's normalize scores        
    for (ScoreDoc scoreDoc : result.scoreDocs) {
        scoreDoc.score /= previousMaxScore;            
    }
    // Let's update previous result with the new one
    if (result.scoreDocs.length > 0) {
        previousResult = result.scoreDocs[result.scoreDocs.length - 1];
    }        
    return result.scoreDocs;
}

我做错了什么？