Class SecondPassGroupingCollector<T>

    • Field Detail

      • groups

        protected final java.util.Collection<SearchGroup<T>> groups
      • groupReducer

        protected final GroupReducer<T,​?> groupReducer
      • totalHitCount

        protected int totalHitCount
      • totalGroupedHitCount

        protected int totalGroupedHitCount
    • Constructor Detail

      • SecondPassGroupingCollector

        public SecondPassGroupingCollector​(GroupSelector<T> groupSelector,
                                           java.util.Collection<SearchGroup<T>> groups,
                                           GroupReducer<T,​?> reducer)
        Create a new SecondPassGroupingCollector
        Parameters:
        groupSelector - the GroupSelector that defines groups for this search
        groups - the groups to collect documents for
        reducer - the reducer to apply to each group
    • Method Detail

      • getGroupSelector

        public GroupSelector<T> getGroupSelector()
        Returns:
        the GroupSelector used in this collector
      • scoreMode

        public ScoreMode scoreMode()
        Description copied from interface: Collector
        Indicates what features are required from the scorer.
      • collect

        public void collect​(int doc)
                     throws java.io.IOException
        Description copied from interface: LeafCollector
        Called once for every document matching a query, with the unbased document number.

        Note: The collection of the current segment can be terminated by throwing a CollectionTerminatedException. In this case, the last docs of the current LeafReaderContext will be skipped and IndexSearcher will swallow the exception and continue collection with the next leaf.

        Note: This is called in an inner search loop. For good search performance, implementations of this method should not call IndexSearcher.doc(int) or IndexReader.document(int) on every hit. Doing so can slow searches by an order of magnitude or more.

        Specified by:
        collect in interface LeafCollector
        Specified by:
        collect in class SimpleCollector
        Throws:
        java.io.IOException