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.

    File outputFile = _TestUtil.createTempFile("test", "tmp", TEMP_DIR);
    TFC.store(outputFile, indexReader, taxoReader, iParams);
    
    // Make the taxonomy grow without touching the index
    for (int i = 0; i < 10; i++) {
      taxoWriter.addCategory(new CategoryPath("foo", Integer.toString(i)));
    }
    taxoWriter.commit();
    TaxonomyReader newTaxoReader = TaxonomyReader.openIfChanged(taxoReader);
    assertNotNull(newTaxoReader);
    taxoReader.close();

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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(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 FacetLabel("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(cp[j]);
        }
        tw.close();
        if (closeReader) {
          tr.close();
          tr = new DirectoryTaxonomyReader(dir);

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    int[] topLevelOrdinals = new int[10];
    String[] topLevelStrings = new String[10];
    for (int i = 0; i < 10; i++) {
      topLevelStrings[i] = Integer.valueOf(random.nextInt(30)).toString();
      topLevelOrdinals[i] = taxonomy.addCategory(new CategoryPath(
          topLevelStrings[i]));
    }
    int[] nonTopLevelOrdinals = new int[300];
    for (int i = 0; i < 300; i++) {
      int nComponents = 2 + random.nextInt(10);

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      String[] components = new String[nComponents];
      components[0] = topLevelStrings[i % 10];
      for (int j = 1; j < components.length; j++) {
        components[j] = (Integer.valueOf(random.nextInt(30))).toString();
      }
      nonTopLevelOrdinals[i] = taxonomy.addCategory(new CategoryPath(
          components));
    }
    // check ordinal policy
    OrdinalPolicy ordinalPolicy = new NonTopLevelOrdinalPolicy();
    ordinalPolicy.init(taxonomy);

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    String[] topLevelStrings = new String[10];
    for (int i = 0; i < 10; i++) {
      topLevelStrings[i] = Integer.valueOf(random.nextInt(30)).toString();


      topLevelPaths[i] = new CategoryPath(topLevelStrings[i]);
      taxonomy.addCategory(topLevelPaths[i]);
    }
    CategoryPath[] nonTopLevelPaths = new CategoryPath[300];
    for (int i = 0; i < 300; i++) {
      int nComponents = 2 + random.nextInt(10);
      String[] components = new String[nComponents];

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      components[0] = topLevelStrings[i % 10];
      for (int j = 1; j < components.length; j++) {
        components[j] = (Integer.valueOf(random.nextInt(30))).toString();
      }
      nonTopLevelPaths[i] = new CategoryPath(components);
      taxonomy.addCategory(nonTopLevelPaths[i]);
    }
    // check ordinal policy
    PathPolicy pathPolicy = new NonTopLevelPathPolicy();
    assertFalse("top level path policy should not match root",
        pathPolicy.shouldAdd(new CategoryPath()));

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  @Test
  public void testPartitionSizeWithCategories() throws Exception {
    FacetSearchParams fsp = new FacetSearchParams();
    Directory dir = newDirectory();
    TaxonomyWriter tw = new LuceneTaxonomyWriter(dir);
    tw.addCategory(new CategoryPath("a"));
    tw.commit();
    tw.close();
    TaxonomyReader tr = new LuceneTaxonomyReader(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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