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

org.apache.lucene.store.Directory.openInput()
Returns a stream reading an existing file.

        long normSeek;


        if (singleNormFile) {
          normSeek = nextNormSeek;
          if (singleNormStream == null) {
            singleNormStream = d.openInput(fileName, readBufferSize);
            singleNormRef = new Ref();
          } else {
            singleNormRef.incRef();
          }
          // All norms in the .nrm file can share a single IndexInput since

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          // they are only used in a synchronized context.
          // If this were to change in the future, a clone could be done here.
          normInput = singleNormStream;
        } else {
          normSeek = 0;
          normInput = d.openInput(fileName);
        }


        norms.put(fi.name, new Norm(normInput, fi.number, normSeek));
        nextNormSeek += maxDoc; // increment also if some norms are separate
      }

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      LOG.info("Context [{0}] index closed", context);
      return;
    }
    long length = endingPosition - startingPosition;
    final long totalLength = length;
    IndexInput input = new ThrottledIndexInput(dir.openInput(fileName, IOContext.READ), _maxBytesPerSec);
    try {
      input.seek(startingPosition);
      byte[] buf = new byte[8192];
      long start = System.nanoTime();
      long bytesReadPerPass = 0;

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      }
      IndexTracer tracer = new IndexTracer((TraceableDirectory) directory, _maxSampleSize);
      String fileName = getSampleFileName(segmentReader.getSegmentName());
      List<IndexTracerResult> segmentTraces = new ArrayList<IndexTracerResult>();
      if (directory.fileExists(fileName)) {
        IndexInput input = directory.openInput(fileName, IOContext.READONCE);
        segmentTraces = read(input);
        input.close();
      } else {
        Fields fields = atomicReader.fields();
        for (String field : fields) {

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        long normSeek;


        if (singleNormFile) {
          normSeek = nextNormSeek;
          if (singleNormStream == null) {
            singleNormStream = d.openInput(fileName, readBufferSize);
            singleNormRef = new AtomicInteger(1);
          } else {
            singleNormRef.incrementAndGet();
          }
          // All norms in the .nrm file can share a single IndexInput since

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          // All norms in the .nrm file can share a single IndexInput since
          // they are only used in a synchronized context.
          // If this were to change in the future, a clone could be done here.
          normInput = singleNormStream;
        } else {
          normInput = d.openInput(fileName);
          // if the segment was created in 3.2 or after, we wrote the header for sure,
          // and don't need to do the sketchy file size check. otherwise, we check 
          // if the size is exactly equal to maxDoc to detect a headerless file.
          // NOTE: remove this check in Lucene 5.0!
          String version = si.getVersion();

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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();

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    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);
    checkStopNodes(fst2, outputs);
    in.close();
    dir.close();
  }

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            start = new Date();


            for (int i = 0; i < count; i++) {
                String name = i + ".dat";
                int length = gen.nextInt() & LENGTH_MASK;
                IndexInput file = store.openInput(name);


                if (file.length() != length)
                    throw new Exception("length incorrect");


                for (int j = 0; j < length; j++) {

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            for (int i = 0; i < count; i++) {
                int length = gen.nextInt() & LENGTH_MASK;


                if (i % 2 != 0) {
                    String name = i + ".dat";
                    IndexInput file = store.openInput(name);
                    if (file.length() != length)
                        throw new Exception("length incorrect");


                    for (int j = 0; j < length; j++) {
                        byte b = (byte) (gen.nextInt() & 0x7F);

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