Review

finding-9

/mubench/checkouts/lucene/1918/build/src/java/org/apache/lucene/index/DirectoryReader.java

DirectoryReader(Directory, SegmentInfos, IndexDeletionPolicy, boolean, int)

class DirectoryReader {
  /** Construct reading the named set of readers. */
  DirectoryReader(Directory directory, SegmentInfos sis, IndexDeletionPolicy deletionPolicy, boolean readOnly, int termInfosIndexDivisor) throws IOException {
    this.directory = directory;
    this.readOnly = readOnly;
    this.segmentInfos = sis;
    this.deletionPolicy = deletionPolicy;
    this.termInfosIndexDivisor = termInfosIndexDivisor;

    if (!readOnly) {
      // We assume that this segments_N was previously
      // properly sync'd:
      synced.addAll(sis.files(directory, true));
    }

    // To reduce the chance of hitting FileNotFound
    // (and having to retry), we open segments in
    // reverse because IndexWriter merges & deletes
    // the newest segments first.

    SegmentReader[] readers = new SegmentReader[sis.size()];
    for (int i = sis.size()-1; i >= 0; i--) {
      boolean success = false;
      try {
        readers[i] = SegmentReader.get(readOnly, sis.info(i), termInfosIndexDivisor);
        success = true;
      } finally {
        if (!success) {
          // Close all readers we had opened:
          for(i++;i<sis.size();i++) {
            try {
              readers[i].close();
            } catch (Throwable ignore) {
              // keep going - we want to clean up as much as possible
            }
          }
        }
      }
    }

    initialize(readers);
  }

}