/* Copyright 2013 The jeo project. All rights reserved.
*
* 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 io.jeo.util;
import java.io.Serializable;
import java.util.Locale;
/**
* A major, minor, patch version number.
*
* @author Justin Deoliveira, Boundless
*/
public class Version implements Serializable, Comparable<Version> {
/** serialVersionUID */
private static final long serialVersionUID = 1L;
Integer major, minor, patch;
/**
* Creates a new version object parsing a version string of the format
* <major>[.<minor>[.<patch>]].
* <p>
* Each component must be parsable as an integer. The minor and patch components are optional.
* </p>
* @param version The version string.
*
* @throws IllegalArgumentException If the version string has more than 3 components.
* @throws NumberFormatException If any of the components is not parsable as an integer.
*/
public Version(String version) {
String[] split = version.split("\\.");
if (split.length > 3) {
throw new IllegalArgumentException(
"Unsupported versoin format, must be <major>[.<minor>[.<patch>]]");
}
this.major = Integer.parseInt(split[0]);
this.minor = split.length > 1 ? Integer.parseInt(split[1]) : 0;
this.patch = split.length > 2 ? Integer.parseInt(split[2]) : 0;
}
/**
* Creates a new version object.
*
* @param major The major number.
* @param minor The minor number, may be <code>null</code> to signify 0.
* @param patch The patch number, may be <code>null</code> to signify 0.
*/
public Version(Integer major, Integer minor, Integer patch) {
this.major = major != null ? major : 0;
this.minor = minor != null ? minor : 0;
this.patch = patch != null ? patch : 0;
}
/**
* The major number component of the version.
*/
public Integer major() {
return major;
}
/**
* The minor number component of the version.
*/
public Integer minor() {
return minor;
}
/**
* The pach number component of the version.
*/
public Integer patch() {
return patch;
}
@Override
public int compareTo(Version v) {
if (v == null) {
throw new IllegalArgumentException("Unable to compare to null version");
}
int i = major.compareTo(v.major);
if (i > 0) {
return 1;
}
else if (i < 0) {
return -1;
}
else {
int j = minor.compareTo(v.minor);
if (j > 0) {
return 1;
}
else if (j < 0) {
return -1;
}
else {
int k = patch.compareTo(v.patch);
if (k > 0) {
return 1;
}
else if (k < 0) {
return -1;
}
else {
return 0;
}
}
}
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((major == null) ? 0 : major.hashCode());
result = prime * result + ((minor == null) ? 0 : minor.hashCode());
result = prime * result + ((patch == null) ? 0 : patch.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Version other = (Version) obj;
if (major == null) {
if (other.major != null)
return false;
} else if (!major.equals(other.major))
return false;
if (minor == null) {
if (other.minor != null)
return false;
} else if (!minor.equals(other.minor))
return false;
if (patch == null) {
if (other.patch != null)
return false;
} else if (!patch.equals(other.patch))
return false;
return true;
}
@Override
public String toString() {
return String.format(Locale.ROOT,"%d.%d.%d", major, minor, patch);
}
}