本文整理汇总了Java中org.apache.lucene.search.grouping.AbstractAllGroupHeadsCollector.retrieveGroupHeads方法的典型用法代码示例。如果您正苦于以下问题：Java AbstractAllGroupHeadsCollector.retrieveGroupHeads方法的具体用法？Java AbstractAllGroupHeadsCollector.retrieveGroupHeads怎么用？Java AbstractAllGroupHeadsCollector.retrieveGroupHeads使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.lucene.search.grouping.AbstractAllGroupHeadsCollector的用法示例。
在下文中一共展示了AbstractAllGroupHeadsCollector.retrieveGroupHeads方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: testTermAllGroupHeadsCollector
import org.apache.lucene.search.grouping.AbstractAllGroupHeadsCollector; //导入方法依赖的package包/类
@Test
public void testTermAllGroupHeadsCollector() throws Exception {
String groupField = "title";
Sort sortWithinGroup = new Sort();
searcherManager.maybeRefresh();
IndexSearcher searcher = searcherManager.acquire();
// Render groupsResult... Note that the groupValue of each GroupDocs will be null, so if you need to present this value you'll have to separately retrieve it (for example using stored fields, FieldCache, etc.).
//Another collector is the TermAllGroupHeadsCollector that can be used to retrieve all most relevant documents per group. Also known as group heads. This can be useful in situations when one wants to compute group based facets / statistics on the complete query result. The collector can be executed during the first or second phase. This collector can also be used with the GroupingSearch convenience utility, but when if one only wants to compute the most relevant documents per group it is better to just use the collector as done here below.
AbstractAllGroupHeadsCollector collector = TermAllGroupHeadsCollector.create(groupField, sortWithinGroup);
searcher.search(new TermQuery(new Term("title", "Lucene")), collector);
// Return all group heads as int array
int[] groupHeadsArray = collector.retrieveGroupHeads();
// Return all group heads as FixedBitSet.
int maxDoc = searcher.getIndexReader().maxDoc();
FixedBitSet groupHeadsBitSet = collector.retrieveGroupHeads(maxDoc);
}
示例2: computeGroupedDocSet
import org.apache.lucene.search.grouping.AbstractAllGroupHeadsCollector; //导入方法依赖的package包/类
private DocSet computeGroupedDocSet(Query query, ProcessedFilter filter, List<Collector> collectors) throws IOException {
Command firstCommand = commands.get(0);
AbstractAllGroupHeadsCollector termAllGroupHeadsCollector =
TermAllGroupHeadsCollector.create(firstCommand.getKey(), firstCommand.getSortWithinGroup());
if (collectors.isEmpty()) {
searchWithTimeLimiter(query, filter, termAllGroupHeadsCollector);
} else {
collectors.add(termAllGroupHeadsCollector);
searchWithTimeLimiter(query, filter, MultiCollector.wrap(collectors.toArray(new Collector[collectors.size()])));
}
return new BitDocSet(termAllGroupHeadsCollector.retrieveGroupHeads(searcher.maxDoc()));
}