hadoop IndexedSorter 源码
haddop IndexedSorter 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/IndexedSorter.java
/*
* 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.
*/
package org.apache.hadoop.util;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* Interface for sort algorithms accepting {@link IndexedSortable} items.
*
* A sort algorithm implementing this interface may only
* {@link IndexedSortable#compare} and {@link IndexedSortable#swap} items
* for a range of indices to effect a sort across that range.
*/
@InterfaceAudience.LimitedPrivate({"MapReduce"})
@InterfaceStability.Unstable
public interface IndexedSorter {
/**
* Sort the items accessed through the given IndexedSortable over the given
* range of logical indices. From the perspective of the sort algorithm,
* each index between l (inclusive) and r (exclusive) is an addressable
* entry.
* @see IndexedSortable#compare
* @see IndexedSortable#swap
*
* @param r r.
* @param l l.
* @param s s.
*/
void sort(IndexedSortable s, int l, int r);
/**
* Same as {@link #sort(IndexedSortable,int,int)}, but indicate progress
* periodically.
* @see #sort(IndexedSortable,int,int)
* @param s s.
* @param l l.
* @param r r.
* @param rep rep.
*/
void sort(IndexedSortable s, int l, int r, Progressable rep);
}
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