Package org.apache.lucene.facet.taxonomy.directory

Examples of org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter.addCategory()

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    TaxonomyWriter tw = new DirectoryTaxonomyWriter(indexDir);
    tw.commit();
    TaxonomyReader tr = new DirectoryTaxonomyReader(indexDir);

    assertEquals(1, tr.getSize()); // the empty taxonomy has size 1 (the root)
    tw.addCategory(new CategoryPath("Author"));
    assertEquals(1, tr.getSize()); // still root only...
    assertNull(TaxonomyReader.openIfChanged(tr)); // this is not enough, because tw.commit() hasn't been done yet
    assertEquals(1, tr.getSize()); // still root only...
    tw.commit();
    assertEquals(1, tr.getSize()); // still root only...
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    // now, add another category, and verify that after commit and refresh
    // the parent of this category is correct (this requires the reader
    // to correctly update its prefetched parent vector), and that the
    // old information also wasn't ruined:
    tw.addCategory(new CategoryPath("Author", "Richard Dawkins"));
    int dawkins = 2;
    tw.commit();
    newTaxoReader = TaxonomyReader.openIfChanged(tr);
    assertNotNull(newTaxoReader);
    tr.close();
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    // Test getOrdinal():
    CategoryPath author = new CategoryPath("Author");

    assertEquals(1, tr.getSize()); // the empty taxonomy has size 1 (the root)
    assertEquals(TaxonomyReader.INVALID_ORDINAL, tr.getOrdinal(author));
    tw.addCategory(author);
    // before commit and refresh, no change:
    assertEquals(TaxonomyReader.INVALID_ORDINAL, tr.getOrdinal(author));
    assertEquals(1, tr.getSize()); // still root only...
    assertNull(TaxonomyReader.openIfChanged(tr)); // this is not enough, because tw.commit() hasn't been done yet
    assertEquals(TaxonomyReader.INVALID_ORDINAL, tr.getOrdinal(author));
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  @Test
  public void testWriterLock() throws Exception {
    // native fslock impl gets angry if we use it, so use RAMDirectory explicitly.
    Directory indexDir = new RAMDirectory();
    TaxonomyWriter tw = new DirectoryTaxonomyWriter(indexDir);
    tw.addCategory(new CategoryPath("hi", "there"));
    tw.commit();
    // we deliberately not close the write now, and keep it open and
    // locked.
    // Verify that the writer worked:
    TaxonomyReader tr = new DirectoryTaxonomyReader(indexDir);
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    }
    // Remove the lock, and now the open should succeed, and we can
    // write to the new writer.
    DirectoryTaxonomyWriter.unlock(indexDir);
    TaxonomyWriter tw2 = new DirectoryTaxonomyWriter(indexDir);
    tw2.addCategory(new CategoryPath("hey"));
    tw2.close();
    // See that the writer indeed wrote:
    TaxonomyReader newtr = TaxonomyReader.openIfChanged(tr);
    assertNotNull(newtr);
    tr.close();
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    Directory dir = newDirectory();
    DirectoryTaxonomyWriter writer = new DirectoryTaxonomyWriter(dir);
    TaxonomyReader reader = new DirectoryTaxonomyReader(writer);
   
    CategoryPath cp = new CategoryPath("a");
    writer.addCategory(cp);
    TaxonomyReader newReader = TaxonomyReader.openIfChanged(reader);
    assertNotNull("expected a new instance", newReader);
    assertEquals(2, newReader.getSize());
    assertNotSame(TaxonomyReader.INVALID_ORDINAL, newReader.getOrdinal(cp));
    reader.close();
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    // the reader, but forgot that it did (because it didn't set the reader
    // reference to null).
    tw = new DirectoryTaxonomyWriter(indexDir);
    fillTaxonomy(tw);
    // Add one new category, just to make commit() do something:
    tw.addCategory(new CategoryPath("hi"));
    // Do a commit(). Here was a bug - if tw had a reader open, it should
    // be reopened after the commit. However, in our case the reader should
    // not be open (as explained above) but because it was not set to null,
    // we forgot that, tried to reopen it, and got an AlreadyClosedException.
    tw.commit();
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  public void testWriterSimpler() throws Exception {
    Directory indexDir = newDirectory();
    TaxonomyWriter tw = new DirectoryTaxonomyWriter(indexDir);
    assertEquals(1, tw.getSize()); // the root only
    // Test that adding a new top-level category works
    assertEquals(1, tw.addCategory(new CategoryPath("a")));
    assertEquals(2, tw.getSize());
    // Test that adding the same category again is noticed, and the
    // same ordinal (and not a new one) is returned.
    assertEquals(1, tw.addCategory(new CategoryPath("a")));
    assertEquals(2, tw.getSize());
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    // Test that adding a new top-level category works
    assertEquals(1, tw.addCategory(new CategoryPath("a")));
    assertEquals(2, tw.getSize());
    // Test that adding the same category again is noticed, and the
    // same ordinal (and not a new one) is returned.
    assertEquals(1, tw.addCategory(new CategoryPath("a")));
    assertEquals(2, tw.getSize());
    // Test that adding another top-level category returns a new ordinal,
    // not the same one
    assertEquals(2, tw.addCategory(new CategoryPath("b")));
    assertEquals(3, tw.getSize());
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    // same ordinal (and not a new one) is returned.
    assertEquals(1, tw.addCategory(new CategoryPath("a")));
    assertEquals(2, tw.getSize());
    // Test that adding another top-level category returns a new ordinal,
    // not the same one
    assertEquals(2, tw.addCategory(new CategoryPath("b")));
    assertEquals(3, tw.getSize());
    // Test that adding a category inside one of the above adds just one
    // new ordinal:
    assertEquals(3, tw.addCategory(new CategoryPath("a","c")));
    assertEquals(4, tw.getSize());
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