hadoop OffsetRange 源码
haddop OffsetRange 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/OffsetRange.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.hdfs.nfs.nfs3;
import java.util.Comparator;
import org.apache.hadoop.util.Preconditions;
/**
* OffsetRange is the range of read/write request. A single point (e.g.,[5,5])
* is not a valid range.
*/
public class OffsetRange {
public static final Comparator<OffsetRange> ReverseComparatorOnMin =
new Comparator<OffsetRange>() {
@Override
public int compare(OffsetRange o1, OffsetRange o2) {
if (o1.getMin() == o2.getMin()) {
return o1.getMax() < o2.getMax() ?
1 : (o1.getMax() > o2.getMax() ? -1 : 0);
} else {
return o1.getMin() < o2.getMin() ? 1 : -1;
}
}
};
private final long min;
private final long max;
OffsetRange(long min, long max) {
Preconditions.checkArgument(min >= 0 && max >= 0 && min < max);
this.min = min;
this.max = max;
}
long getMin() {
return min;
}
long getMax() {
return max;
}
@Override
public int hashCode() {
return (int) (min ^ max);
}
@Override
public boolean equals(Object o) {
if (o instanceof OffsetRange) {
OffsetRange range = (OffsetRange) o;
return (min == range.getMin()) && (max == range.getMax());
}
return false;
}
public String toString() {
return "[" + getMin() + ", " + getMax() + ")";
}
}
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