Examples of DirectoryTaxonomyWriter

org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter

{@link TaxonomyWriter} which uses a {@link Directory} to store the taxonomyinformation on disk, and keeps an additional in-memory cache of some or all categories.

In addition to the permanently-stored information in the {@link Directory}, efficiency dictates that we also keep an in-memory cache of recently seen or all categories, so that we do not need to go back to disk for every category addition to see which ordinal this category already has, if any. A {@link TaxonomyWriterCache} object determines the specific cachingalgorithm used.

This class offers some hooks for extending classes to control the {@link IndexWriter} instance that is used. See {@link #openIndexWriter}. @lucene.experimental

    
    // create and open an index writer
    RandomIndexWriter iw = new RandomIndexWriter(random(), indexDir, newIndexWriterConfig(
        TEST_VERSION_CURRENT, new MockAnalyzer(random(), MockTokenizer.WHITESPACE, false)));
    // create and open a taxonomy writer
    TaxonomyWriter tw = new DirectoryTaxonomyWriter(taxoDir, OpenMode.CREATE);


    PerDimensionIndexingParams iParams = new PerDimensionIndexingParams(Collections.<CategoryPath, CategoryListParams>emptyMap());


    seedIndex(iw, tw, iParams);


    IndexReader ir = iw.getReader();
    tw.commit();


    // prepare index reader and taxonomy.
    TaxonomyReader tr = new DirectoryTaxonomyReader(taxoDir);


    // prepare searcher to search against

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Examples of DirectoryTaxonomyWriter

Examples of org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter