content: package org.apache.lucene.index;
  
  /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import java.io.IOException;
  
  import org.apache.lucene.index.PayloadProcessorProvider.DirPayloadProcessor;
  
  final class SegmentMergeInfo {
    Term term;
    int base;
    int ord;  // the position of the segment in a MultiReader
    TermEnum termEnum;
    IndexReader reader;
    int delCount;
    private TermPositions postings;  // use getPositions()
    private int[] docMap;  // use getDocMap()
    DirPayloadProcessor dirPayloadProcessor;
    
    SegmentMergeInfo(int b, TermEnum te, IndexReader r)
      throws IOException {
      base = b;
      reader = r;
      termEnum = te;
      term = te.term();
    }
  
    // maps around deleted docs
    int[] getDocMap() {
      if (docMap == null) {
        delCount = 0;
        // build array which maps document numbers around deletions 
        if (reader.hasDeletions()) {
          int maxDoc = reader.maxDoc();
          docMap = new int[maxDoc];
          int j = 0;
          for (int i = 0; i < maxDoc; i++) {
            if (reader.isDeleted(i)) {
              delCount++;
              docMap[i] = -1;
            } else
              docMap[i] = j++;
          }
        }
      }
      return docMap;
    }
  
    TermPositions getPositions() throws IOException {
      if (postings == null) {
        postings = reader.termPositions();
      }
      return postings;
    }
  
    final boolean next() throws IOException {
      if (termEnum.next()) {
        term = termEnum.term();
        return true;
      } else {
        term = null;
        return false;
      }
    }
  
    final void close() throws IOException {
      try {
        termEnum.close();
      } finally {
        if (postings != null) {
          postings.close();
        }
      }
    }
  }
  
  