kafka VersionRange 源码
kafka VersionRange 代码
文件路径：/metadata/src/main/java/org/apache/kafka/metadata/VersionRange.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.kafka.metadata;
import java.util.Objects;
/**
* An immutable class which represents version ranges.
*/
public class VersionRange {
public final static VersionRange ALL = of((short) 0, Short.MAX_VALUE);
private final short min;
private final short max;
private VersionRange(short min, short max) {
this.min = min;
this.max = max;
}
public static VersionRange of(short min, short max) {
return new VersionRange(min, max);
}
public static VersionRange of(int min, int max) {
return new VersionRange((short) min, (short) max);
}
public short min() {
return min;
}
public short max() {
return max;
}
/**
* Check if a given version is fully contained within this range
*/
public boolean contains(short version) {
return version >= min && version <= max;
}
/**
* Check if a given version range has overlap with this one
*/
public boolean intersects(VersionRange other) {
return other.min <= max && other.max >= min;
}
@Override
public int hashCode() {
return Objects.hash(min, max);
}
@Override
public boolean equals(Object o) {
if (!(o instanceof VersionRange)) return false;
VersionRange other = (VersionRange) o;
return other.min == min && other.max == max;
}
@Override
public String toString() {
if (min == max) {
return String.valueOf(min);
} else if (max == Short.MAX_VALUE) {
return String.valueOf(min) + "+";
} else {
return String.valueOf(min) + "-" + String.valueOf(max);
}
}
}
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