com.huawei.openstack4j.openstack.internal.MicroVersion Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright 2016 ContainX and OpenStack4j
*
* 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.
*******************************************************************************/
package com.huawei.openstack4j.openstack.internal;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Common representation of an API micro version.
*
* @author Daniel Gonzalez Nothnagel
*/
public class MicroVersion implements Comparable {
private final static Pattern VERSION_REGEX = Pattern.compile("^([1-9]\\d*)\\.([1-9]\\d*|0|)$");
private final int majorVersion;
private final int minorVersion;
public MicroVersion(String version) {
Matcher versionMatcher = VERSION_REGEX.matcher(version);
if (!versionMatcher.matches()) {
throw new IllegalArgumentException(String.format(
"Invalid version pattern %s, should be 'X.Y' (Major.Minor)", version));
}
majorVersion = Integer.valueOf(versionMatcher.group(1));
minorVersion = Integer.valueOf(versionMatcher.group(2));
}
public MicroVersion(int majorVersion, int minorVersion) {
this.majorVersion = majorVersion;
this.minorVersion = minorVersion;
}
@Override
public int compareTo(MicroVersion o) {
int majorDifference = majorVersion - o.majorVersion;
if (majorDifference != 0) {
return majorDifference;
}
return minorVersion - o.minorVersion;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof MicroVersion) {
MicroVersion v = (MicroVersion) obj;
return compareTo(v) == 0;
}
return false;
}
@Override
public String toString() {
return String.format("%d.%d", majorVersion, minorVersion);
}
}