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Lucene example source code file (SegmentMergeInfo.java)

This example Lucene source code file (SegmentMergeInfo.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

dirpayloadprocessor, indexreader, indexreader, io, ioexception, ioexception, multireader, segmentmergeinfo, segmentmergeinfo, term, termenum, termpositions, termpositions

The Lucene SegmentMergeInfo.java source code

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,
 * 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)) {
            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 {
    } finally {
      if (postings != null) {

Other Lucene examples (source code examples)

Here is a short list of links related to this Lucene SegmentMergeInfo.java source code file:

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