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

    r.close();
    
    // create second gen of update files, first gen should be deleted
    writer.updateNumericDocValue(new Term("id", "d0"), "f", 5L);
    writer.commit();
    assertEquals(numFiles, dir.listAll().length);


    r = DirectoryReader.open(dir);
    assertEquals(5L, r.leaves().get(0).reader().getNumericDocValues("f").get(0));
    r.close();

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          dir,
          newIndexWriterConfig( TEST_VERSION_CURRENT, new MockAnalyzer(random())).
              setRAMBufferSizeMB(0.000001).
              setMergePolicy(newLogMergePolicy(10))
      );
      int lastNumFile = dir.listAll().length;
      for(int j=0;j<9;j++) {
        Document doc = new Document();
        doc.add(newField("field", "aaa" + j, storedTextType));
        writer.addDocument(doc);
        int numFile = dir.listAll().length;

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      int lastNumFile = dir.listAll().length;
      for(int j=0;j<9;j++) {
        Document doc = new Document();
        doc.add(newField("field", "aaa" + j, storedTextType));
        writer.addDocument(doc);
        int numFile = dir.listAll().length;
        // Verify that with a tiny RAM buffer we see new
        // segment after every doc
        assertTrue(numFile > lastNumFile);
        lastNumFile = numFile;
      }

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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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          IOUtils.close(writer, reader);
        } else {
          IOUtils.closeWhileHandlingException(writer, reader);
        }
      } finally {
        for(String file : dir.listAll()) {
          File path = new File(tempIndexPath, file);
          if (path.delete() == false) {
            throw new IllegalStateException("failed to remove " + path);
          }
        }

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    indexWriter.close();


    _TestUtil.checkIndex(dir);


    assertNoUnreferencedFiles(dir, "no tv files");
    String[] files = dir.listAll();
    for(int idx=0;idx<files.length;idx++) {
      String file = files[idx];
      assertTrue(!file.endsWith(IndexFileNames.VECTORS_FIELDS_EXTENSION));
      assertTrue(!file.endsWith(IndexFileNames.VECTORS_INDEX_EXTENSION));
      assertTrue(!file.endsWith(IndexFileNames.VECTORS_DOCUMENTS_EXTENSION));

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        writer.close();


        long gen = SegmentInfos.getCurrentSegmentGeneration(dir);
        assertTrue("segment generation should be > 1 but got " + gen, gen > 1);


        String[] files = dir.listAll();
        for(int i=0;i<files.length;i++) {
          if (files[i].endsWith(".cfs")) {
            dir.deleteFile(files[i]);
            break;
          }

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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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        if (gen > 0) {
          // Now that we've removed a commit point, which
          // should have orphan'd at least one index file.
          // Open & close a writer and assert that it
          // actually removed something:
          int preCount = dir.listAll().length;
          writer = new IndexWriter(dir, newIndexWriterConfig(
              TEST_VERSION_CURRENT,
              new MockAnalyzer(random())).setOpenMode(
              OpenMode.APPEND).setIndexDeletionPolicy(policy));
          writer.close();

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          writer = new IndexWriter(dir, newIndexWriterConfig(
              TEST_VERSION_CURRENT,
              new MockAnalyzer(random())).setOpenMode(
              OpenMode.APPEND).setIndexDeletionPolicy(policy));
          writer.close();
          int postCount = dir.listAll().length;
          assertTrue(postCount < preCount);
        }
      }


      dir.close();

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