SegmentMergeInfo.cs :  » Search-Engines » NLucene » DotnetPark » NLucene » Index » C# / CSharp Open Source

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 * The Apache Software License, Version 1.1
 *
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 * reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
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 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 */

using System;
using System.Collections;

using DotnetPark.NLucene.Util; 

namespace DotnetPark.NLucene.Index{
  internal class SegmentMergeInfo 
  {
    Term term;
    int bs;
    SegmentTermEnum termEnum;
    SegmentReader reader;
    SegmentTermPositions postings;
    int[] docMap = null;          // maps around deleted docs

    internal SegmentMergeInfo(int b, SegmentTermEnum te, SegmentReader r) 
    {
      bs = b;
      reader = r;
      termEnum = te;
      term = te.Term();
      postings = new SegmentTermPositions(r);

      if (reader.DeletedDocs != null) 
      {
        // build array which maps document numbers around deletions 
        BitVector deletedDocs = reader.DeletedDocs;
        int maxDoc = reader.MaxDoc();
        docMap = new int[maxDoc];
        int j = 0;
        for (int i = 0; i < maxDoc; i++) 
        {
          if (deletedDocs.Get(i))
            docMap[i] = -1;
          else
            docMap[i] = j++;
        }
      }
    }

    internal bool Next() 
    {
      if (termEnum.Next()) 
      {
        term = termEnum.Term();
        return true;
      } 
      else 
      {
        term = null;
        return false;
      }
    }

    internal void Close() 
    {
      termEnum.Close();
      postings.Close();
    }

    internal Term Term
    {
      get
      {
        return term;
      }
      set
      {
        term = value;
      }
    }
    internal int Base
    {
      get
      {
        return bs;
      }
      set
      {
        bs = value;
      }
    }
    internal SegmentTermPositions Postings
    {
      get
      {
        return postings;
      }
      set
      {
        postings = value;
      }
    }

    internal int[] DocMap
    {
      get
      {
        return docMap;
      }
      set
      {
        docMap = value;
      }
    }

    internal SegmentTermEnum TermEnum
    {
      get
      {
        return termEnum;
      }
      set
      {
        termEnum = value;
      }
    }
  }
}