?? segmentmergequeue.java
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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;import org.apache.lucene.util.PriorityQueue;final class SegmentMergeQueue extends PriorityQueue { SegmentMergeQueue(int size) { initialize(size); } protected final boolean lessThan(Object a, Object b) { SegmentMergeInfo stiA = (SegmentMergeInfo)a; SegmentMergeInfo stiB = (SegmentMergeInfo)b; int comparison = stiA.term.compareTo(stiB.term); if (comparison == 0) return stiA.base < stiB.base; else return comparison < 0; } final void close() throws IOException { while (top() != null) ((SegmentMergeInfo)pop()).close(); }}
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