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Java > Open Source Codes > org > apache > lucene > index > SegmentMergeQueue


1 package org.apache.lucene.index;
2
3 /**
4  * Copyright 2004 The Apache Software Foundation
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */

18
19 import java.io.IOException JavaDoc;
20 import org.apache.lucene.util.PriorityQueue;
21
22 final class SegmentMergeQueue extends PriorityQueue {
23   SegmentMergeQueue(int size) {
24     initialize(size);
25   }
26
27   protected final boolean lessThan(Object JavaDoc a, Object JavaDoc b) {
28     SegmentMergeInfo stiA = (SegmentMergeInfo)a;
29     SegmentMergeInfo stiB = (SegmentMergeInfo)b;
30     int comparison = stiA.term.compareTo(stiB.term);
31     if (comparison == 0)
32       return stiA.base < stiB.base;
33     else
34       return comparison < 0;
35   }
36
37   final void close() throws IOException JavaDoc {
38     while (top() != null)
39       ((SegmentMergeInfo)pop()).close();
40   }
41
42 }
43
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