package org.apache.lucene.index;
/**
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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;
final class SegmentMergeInfo {
Term term;
int base;
TermEnum termEnum;
IndexReader reader;
private TermPositions postings; // use getPositions()
private int[] docMap; // use getDocMap()
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) {
// 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 {
termEnum.close();
if (postings != null) {
postings.close();
}
}
}
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