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

org.apache.lucene.store.Directory.createOutput()
Creates a new, empty file in the directory with the given name. Returns a stream writing this file.

    File indexDir = new File(System.getProperty("tempDir"), "otherfiles");
    Directory dir = FSDirectory.open(indexDir);
    try {
      // Create my own random file:


      IndexOutput out = dir.createOutput("myrandomfile");
      out.writeByte((byte) 42);
      out.close();


      new IndexWriter(dir, new WhitespaceAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED).close();

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        String fileNameIn = SegmentInfos.getCurrentSegmentFileName(dir);
        String fileNameOut = IndexFileNames.fileNameFromGeneration(IndexFileNames.SEGMENTS,
                                                                   "",
                                                                   1+gen);
        IndexInput in = dir.openInput(fileNameIn);
        IndexOutput out = dir.createOutput(fileNameOut);
        long length = in.length();
        for(int i=0;i<length-1;i++) {
          out.writeByte(in.readByte());
        }
        in.close();

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        String fileNameIn = SegmentInfos.getCurrentSegmentFileName(dir);
        String fileNameOut = IndexFileNames.fileNameFromGeneration(IndexFileNames.SEGMENTS,
                                                                   "",
                                                                   1+gen);
        IndexInput in = dir.openInput(fileNameIn);
        IndexOutput out = dir.createOutput(fileNameOut);
        long length = in.length();
        for(int i=0;i<length-1;i++) {
          out.writeByte(in.readByte());
        }
        in.close();

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    checkStopNodes(fst, outputs);


    // Make sure it still works after save/load:
    Directory dir = newDirectory();
    IndexOutput out = dir.createOutput("fst");
    fst.save(out);
    out.close();


    IndexInput in = dir.openInput("fst");
    final FST<Long> fst2 = new FST<Long>(in, outputs);

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    long gen = SegmentInfos.getCurrentSegmentGeneration(dir);
    assertTrue("segment generation should be > 0 but got " + gen, gen > 0);


    final String segmentsFileName = SegmentInfos.getCurrentSegmentFileName(dir);
    IndexInput in = dir.openInput(segmentsFileName);
    IndexOutput out = dir.createOutput(IndexFileNames.fileNameFromGeneration(IndexFileNames.SEGMENTS, "", 1+gen));
    out.copyBytes(in, in.length()-1);
    byte b = in.readByte();
    out.writeByte((byte) (1+b));
    out.close();
    in.close();

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          w.close();
          System.out.println("Wrote FST to out.dot");
        }


        Directory dir = FSDirectory.open(new File(dirOut));
        IndexOutput out = dir.createOutput("fst.bin");
        fst.save(out);
        out.close();


        System.out.println("Saved FST to fst.bin.");

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  public void testOtherFiles() throws Throwable {
    Directory dir = newDirectory();
    try {
      // Create my own random file:
      IndexOutput out = dir.createOutput("myrandomfile");
      out.writeByte((byte) 42);
      out.close();


      new IndexWriter(dir, newIndexWriterConfig( TEST_VERSION_CURRENT, new MockAnalyzer(random))).close();

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      Cache cache = cacheManager.getCache();
      Directory dir = DirectoryBuilder.newDirectoryInstance(cache, cache, cache, INDEXNAME).chunkSize(BUFFER_SIZE).create();
      
      String fileName = "SomeText.txt";
      IndexOutput io = dir.createOutput(fileName, IOContext.DEFAULT);
      RepeatableLongByteSequence bytesGenerator = new RepeatableLongByteSequence();
      //It writes repeatable text
      final int REPEATABLE_BUFFER_SIZE = 1501;
      for (int i = 0; i < REPEATABLE_BUFFER_SIZE; i++) {
         io.writeByte(bytesGenerator.nextByte());

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      final int BUFFER_SIZE = 64;


      Cache cache = cacheManager.getCache();
      Directory dir = DirectoryBuilder.newDirectoryInstance(cache, cache, cache, INDEXNAME).chunkSize(BUFFER_SIZE).create();


      IndexOutput io = dir.createOutput("MyNewFile.txt", IOContext.DEFAULT);


      io.writeByte((byte) 66);
      io.writeByte((byte) 69);


      io.flush();

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      ii.close();


      assert new String(new byte[] { 66, 69 }).equals(new String(buf).trim());


      String testText = "This is some rubbish again that will span more than one chunk - one hopes.  Who knows, maybe even three or four chunks.";
      io = dir.createOutput("MyNewFile.txt", IOContext.DEFAULT);
      io.seek(0);
      io.writeBytes(testText.getBytes(), 0, testText.length());
      io.close();
      // now compare.
      byte[] chunk1 = (byte[]) cache.get(new ChunkCacheKey(INDEXNAME, "MyNewFile.txt", 0, BUFFER_SIZE));

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