Examples of org.apache.lucene.facet.taxonomy.TaxonomyWriter.addCategory()

Package org.apache.lucene.facet.taxonomy

Class org.apache.lucene.facet.taxonomy.TaxonomyWriter

Examples of org.apache.lucene.facet.taxonomy.TaxonomyWriter.addCategory()

org.apache.lucene.facet.taxonomy.TaxonomyWriter.addCategory()
addCategory() adds a category with a given path name to the taxonomy, and returns its ordinal. If the category was already present in the taxonomy, its existing ordinal is returned.
Before adding a category, addCategory() makes sure that all its ancestor categories exist in the taxonomy as well. As result, the ordinal of a category is guaranteed to be smaller then the ordinal of any of its descendants.

    
    try {
      dir = newDirectory();
      
      tw = new DirectoryTaxonomyWriter(dir);
      tw.addCategory(new CategoryPath("a"));
      tw.close();
      
      tr = new DirectoryTaxonomyReader(dir);
      int baseNumCategories = tr.getSize();

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      for (int i=0; i<n; i++) {
        int k = random.nextInt(n);
        tw = new DirectoryTaxonomyWriter(dir, OpenMode.CREATE);
        for (int j=0; j<=k; j++) {
          tw.addCategory(new CategoryPath(cp[j]));
        }
        tw.close();
        if (closeReader) {
          tr.close();
          tr = new DirectoryTaxonomyReader(dir);

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    try {
      dir = newDirectory();
      
      tw = new DirectoryTaxonomyWriter(dir);
      tw.addCategory(new CategoryPath("a"));
      tw.close();
      
      tr = new DirectoryTaxonomyReader(dir);
      int baseNumcategories = tr.getSize();

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      for (int i=0; i<n; i++) {
        int k = random.nextInt(n);
        tw = new DirectoryTaxonomyWriter(dir, OpenMode.CREATE);
        for (int j=0; j<=k; j++) {
          tw.addCategory(new CategoryPath(cp[j]));
        }
        tw.close();
        if (closeReader) {
          tr.close();
          tr = new DirectoryTaxonomyReader(dir);

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  @Test
  public void testPartitionSizeWithCategories() throws Exception {
    FacetSearchParams fsp = new FacetSearchParams();
    Directory dir = newDirectory();
    TaxonomyWriter tw = new DirectoryTaxonomyWriter(dir);
    tw.addCategory(new CategoryPath("a"));
    tw.commit();
    tw.close();
    TaxonomyReader tr = new DirectoryTaxonomyReader(dir);
    assertEquals("unexpected partition offset for 1 categories", 2, PartitionsUtils.partitionOffset(fsp, 1, tr));
    assertEquals("unexpected partition size for 1 categories", 2, PartitionsUtils.partitionSize(fsp,tr));

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