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

org.apache.lucene.store.Directory.fileExists()
Returns true iff a file with the given name exists.

      doc.add(newStringField("id", ""+id, Field.Store.NO));
      doc.add(newTextField("body", sb.toString(), Field.Store.NO));
      w.updateDocument(new Term("id", ""+id), doc);
      docsInSegment.incrementAndGet();
      // TODO: fix this test
      if (dir.fileExists("_0_1.del") || dir.fileExists("_0_1.liv")) {
        if (VERBOSE) {
          System.out.println("TEST: deletes created @ id=" + id);
        }
        break;
      }

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    assertSnapshotExists(dir, sdp, numSnapshots - 1);
    writer.close();


    // but 'snapshot1' files will still exist (need to release snapshot before they can be deleted).
    String segFileName = sdp.getSnapshot("snapshot1").getSegmentsFileName();
    assertTrue("snapshot files should exist in the directory: " + segFileName, dir.fileExists(segFileName));


    dir.close();
  }


  @Test

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      // expected
    }
    assertNull(sdp.getSnapshots().get(snapId));
    writer.deleteUnusedFiles();
    writer.close();
    assertFalse("segments file should not be found in dirctory: " + segFileName, dir.fileExists(segFileName));
    dir.close();
  }


  @Test
  public void testExistingSnapshots() throws Exception {

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    // open a new writer w/ KeepOnlyLastCommit policy, so it will delete "s1"
    // commit.
    new IndexWriter(dir, getConfig(random(), null)).close();
    
    assertFalse("snapshotted commit should not exist", dir.fileExists(ic.getSegmentsFileName()));
    
    // Now reinit SDP from the commits in the index - the snapshot id should not
    // exist anymore.
    sdp = getDeletionPolicy(sdp.getSnapshots());
    new IndexWriter(dir, getConfig(random(), sdp)).close();

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        //  now open reader again & set norm for doc 0 (writes to _0_2.s0)
        reader = IndexReader.open(dir);
        reader.setNorm(0, "content", (float) 2.0);
        reader.close();
        assertFalse("failed to remove first generation norms file on writing second generation",
                    dir.fileExists("_0_1.s0"));
        
        dir.close();
    }

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    } catch (CrashingException e) {
      // expected
    }
    // writes segments_3
    indexWriter.close();
    assertFalse(realDirectory.fileExists("segments_2"));
    crashAfterCreateOutput.close();
  }
    
  /**
   * Attempts to index another 1 document.

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    // currently the test fails above.
    // however, to test the fix, the following lines should pass as well.
    indexWriter.addDocument(getDocument());
    indexWriter.close();
    assertFalse(realDirectory.fileExists("segments_2"));
    realDirectory.close();
  }
    
  /**
   * Run an example search.

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      out.writeByte((byte) 42);
      out.close();
      
      new IndexWriter(dir, newIndexWriterConfig( TEST_VERSION_CURRENT, new MockAnalyzer(random()))).close();
      
      assertTrue(dir.fileExists("myrandomfile"));
    } finally {
      dir.close();
    }
  }

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      out.writeByte((byte) 42);
      out.close();
      
      new IndexWriter(dir, newIndexWriterConfig( TEST_VERSION_CURRENT, new MockAnalyzer(random()))).close();
      
      assertTrue(dir.fileExists("_a.frq"));
      
      IndexWriter iw = new IndexWriter(dir, 
          newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())));
      iw.addDocument(new Document());
      iw.close();

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      IndexWriter iw = new IndexWriter(dir, 
          newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())));
      iw.addDocument(new Document());
      iw.close();
      
      assertFalse(dir.fileExists("_a.frq"));
    } finally {
      dir.close();
    }
  }

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