Examples of org.apache.lucene.store.Directory.listAll()

org.apache.lucene.store.Directory.listAll()
Returns an array of strings, one for each file in the directory. @throws IOException

      //assertTrue(files.contains("_2.cfs"));


      r.close();
      if (iter == 0) {
        // on closing NRT reader, it calls writer.deleteUnusedFiles
        files = Arrays.asList(dir.listAll());
        assertFalse(files.contains("_0.cfs"));
      } else {
        // now writer can remove it
        w.deleteUnusedFiles();
        files = Arrays.asList(dir.listAll());

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        files = Arrays.asList(dir.listAll());
        assertFalse(files.contains("_0.cfs"));
      } else {
        // now writer can remove it
        w.deleteUnusedFiles();
        files = Arrays.asList(dir.listAll());
        assertFalse(files.contains("_0.cfs"));
      }
      //assertTrue(files.contains("_2.cfs"));


      w.close();

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    // files are left in the Directory.
    Directory dir = newDirectory();
    IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(
        TEST_VERSION_CURRENT, new MockAnalyzer(random()))
                                         .setMaxBufferedDocs(2).setMergePolicy(newLogMergePolicy()).setUseCompoundFile(false));
    String[] files = dir.listAll();


    // Creating over empty dir should not create any files,
    // or, at most the write.lock file
    final int extraFileCount;
    if (files.length == 1) {

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    // create as many files as possible
    doc.add(newField("c", "val", customType));
    writer.addDocument(doc);
    // Adding just one document does not call flush yet.
    int computedExtraFileCount = 0;
    for (String file : dir.listAll()) {
      if (file.lastIndexOf('.') < 0
          // don't count stored fields and term vectors in
          || !Arrays.asList("fdx", "fdt", "tvx", "tvd", "tvf").contains(file.substring(file.lastIndexOf('.') + 1))) {
        ++computedExtraFileCount;
      }

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    doc = new Document();
    doc.add(newField("c", "val", customType));
    writer.addDocument(doc);


    // The second document should cause a flush.
    assertTrue("flush should have occurred and files should have been created", dir.listAll().length > 5 + extraFileCount);


    // After rollback, IW should remove all files
    writer.rollback();
    assertEquals("no files should exist in the directory after rollback", 0, dir.listAll().length);

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    // The second document should cause a flush.
    assertTrue("flush should have occurred and files should have been created", dir.listAll().length > 5 + extraFileCount);


    // After rollback, IW should remove all files
    writer.rollback();
    assertEquals("no files should exist in the directory after rollback", 0, dir.listAll().length);


    // Since we rolled-back above, that close should be a no-op
    writer.close();
    assertEquals("expected a no-op close after IW.rollback()", 0, dir.listAll().length);
    dir.close();

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    writer.rollback();
    assertEquals("no files should exist in the directory after rollback", 0, dir.listAll().length);


    // Since we rolled-back above, that close should be a no-op
    writer.close();
    assertEquals("expected a no-op close after IW.rollback()", 0, dir.listAll().length);
    dir.close();
  }


  public void testNoSegmentFile() throws IOException {
    BaseDirectoryWrapper dir = newDirectory();

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      w.deleteAll();
      w.commit();
      // Make sure we accumulate no files except for empty
      // segments_N and segments.gen:
      assertTrue(d.listAll().length <= 2);
    }


    w.close();
    d.close();
  }

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                                                  "_0_1.liv",
                                                  "_0.si",
                                                  "segments_2",
                                                  "segments.gen"};


      String[] actual = dir.listAll();
      Arrays.sort(expected);
      Arrays.sort(expectedSimpleText);
      Arrays.sort(actual);
      if (!Arrays.equals(expected, actual) && !Arrays.equals(expectedSimpleText, actual)) {
        fail("incorrect filenames in index: expected:\n    " + asString(expected)

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    for (int i = 0; i < size; i++) {
      assertEquals(i + 1, readers[i].numDocs());
      checkReader(readers[i], i);
    }


    String[] listAll = directory.listAll();


    for (int i = 0; i < size - 1; i++) {
      readers[i].close();
    }

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