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/*
* Copyright 2014-2015 Open Networking Laboratory
*
* 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 org.onosproject.core;
import java.util.Objects;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Strings.isNullOrEmpty;
import static java.lang.Integer.parseInt;
/**
* Representation of the product version.
*/
public final class Version {
public static final String FORMAT_MINIMAL = "%d.%d";
public static final String FORMAT_SHORT = "%d.%d.%s";
public static final String FORMAT_LONG = "%d.%d.%s.%s";
private static final String NEGATIVE = "Version segment cannot be negative";
public static final String TOO_SHORT = "Version must have at least major and minor numbers";
private final int major;
private final int minor;
private final String patch;
private final String build;
private final String format;
// Creates a new version descriptor
private Version(int major, int minor, String patch, String build) {
this.major = major;
this.minor = minor;
this.patch = patch;
this.build = build;
this.format =
isNullOrEmpty(patch) ?
String.format(FORMAT_MINIMAL, major, minor) :
(isNullOrEmpty(build) ?
String.format(FORMAT_SHORT, major, minor, patch) :
String.format(FORMAT_LONG, major, minor, patch, build));
}
/**
* Creates a new version from the specified constituent numbers.
*
* @param major major version number
* @param minor minor version number
* @param patch version patch segment
* @param build optional build string
* @return version descriptor
*/
public static Version version(int major, int minor, String patch, String build) {
checkArgument(major >= 0, NEGATIVE);
checkArgument(minor >= 0, NEGATIVE);
return new Version(major, minor, patch, build);
}
/**
* Creates a new version by parsing the specified string.
*
* @param string version string
* @return version descriptor
*/
public static Version version(String string) {
String[] fields = string.split("[.-]");
checkArgument(fields.length >= 2, TOO_SHORT);
return new Version(parseInt(fields[0]), parseInt(fields[1]),
fields.length >= 3 ? fields[2] : null,
fields.length >= 4 ? fields[3] : null);
}
/**
* Returns the major version number.
*
* @return major version number
*/
public int major() {
return major;
}
/**
* Returns the minor version number.
*
* @return minor version number
*/
public int minor() {
return minor;
}
/**
* Returns the version patch segment.
*
* @return patch number
*/
public String patch() {
return patch;
}
/**
* Returns the version build string.
*
* @return build string
*/
public String build() {
return build;
}
@Override
public String toString() {
return format;
}
@Override
public int hashCode() {
return Objects.hash(format);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof Version) {
final Version other = (Version) obj;
return Objects.equals(this.format, other.format);
}
return false;
}
}
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