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("_0.cfs"));
      // optimize created this
      //assertTrue(files.contains("_2.cfs"));
      w.deleteUnusedFiles();


      files = Arrays.asList(dir.listAll());
      // r still holds this file open
      assertTrue(files.contains("_0.cfs"));
      //assertTrue(files.contains("_2.cfs"));


      r.close();

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      //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()));
    String[] files = dir.listAll();


    writer.setInfoStream(VERBOSE ? System.out : null);


    // Creating over empty dir should not create any files,
    // or, at most the write.lock file

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    Document doc = new Document();
    // create as many files as possible
    doc.add(newField("c", "val", Store.YES, Index.ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
    writer.addDocument(doc);
    // Adding just one document does not call flush yet.
    assertEquals("only the stored and term vector files should exist in the directory", 5 + extraFileCount, dir.listAll().length);
    
    doc = new Document();
    doc.add(newField("c", "val", Store.YES, Index.ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
    writer.addDocument(doc);

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    doc = new Document();
    doc.add(newField("c", "val", Store.YES, Index.ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
    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 {
    Directory dir = newDirectory();

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    }


    indexWriter.close();


    assertNoUnreferencedFiles(dir, "no tv files");
    String[] files = dir.listAll();
    for(String file : files) {
      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.addDocument(doc);


    // create first gen of update files
    writer.updateNumericDocValue(new Term("id", "d0"), "f", 2L);
    writer.commit();
    int numFiles = dir.listAll().length;


    DirectoryReader r = DirectoryReader.open(dir);
    assertEquals(2L, r.leaves().get(0).reader().getNumericDocValues("f").get(0));
    r.close();

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