Examples of org.apache.lucene.index.sorter.SortingMergePolicy

org.apache.lucene.index.sorter.SortingMergePolicy
A {@link MergePolicy} that reorders documents according to a {@link Sorter}before merging them. As a consequence, all segments resulting from a merge will be sorted while segments resulting from a flush will be in the order in which documents have been added.
NOTE: Never use this {@link MergePolicy} if you rely on{@link IndexWriter#addDocuments(Iterable,org.apache.lucene.analysis.Analyzer)}to have sequentially-assigned doc IDs, this policy will scatter doc IDs.
NOTE: This {@link MergePolicy} should only be used with idempotent{@link Sorter}s so that the order of segments is predictable. For example, using {@link SortingMergePolicy} with {@link Sorter#REVERSE_DOCS} (which isnot idempotent) will make the order of documents in a segment depend on the number of times the segment has been merged. @lucene.experimental

    iwc.setOpenMode(openMode);


    // This way all merged segments will be sorted at
    // merge time, allow for per-segment early termination
    // when those segments are searched:
    iwc.setMergePolicy(new SortingMergePolicy(iwc.getMergePolicy(), SORT));


    return iwc;
  }

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    iwc.setOpenMode(openMode);


    // This way all merged segments will be sorted at
    // merge time, allow for per-segment early termination
    // when those segments are searched:
    iwc.setMergePolicy(new SortingMergePolicy(iwc.getMergePolicy(), SORT));


    return iwc;
  }

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        // Setup index writer
        IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_48, analyzer);
        config.setRAMBufferSizeMB(ramBufferMB);
        config.setOpenMode(IndexWriterConfig.OpenMode.CREATE_OR_APPEND);
        config.setUseCompoundFile(true);
        config.setMergePolicy(new SortingMergePolicy(config.getMergePolicy(), sort));
        indexWriter = new IndexWriter(directory, config);


        // Setup NRT search
        SearcherFactory searcherFactory = new SearcherFactory()
        {

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