org.apache.axis2.description.Version Maven / Gradle / Ivy
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Core Parts of Axis2. This includes Axis2 engine, Client API, Addressing support, etc.,
/*
* 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.axis2.description;
import java.io.Serializable;
import java.text.ParseException;
import java.util.Arrays;
/**
* Class representing a version number and implementing a comparison algorithm compatible
* with Maven. This class is primarily used for module versions.
*/
public class Version implements Serializable, Comparable {
private static final String S_SNAPSHOT = "SNAPSHOT";
public static final Version SNAPSHOT = new Version(null, S_SNAPSHOT);
private final int[] components;
private final String qualifier;
/**
* Constructor.
*
* @param components the numeric components of the version; may be null for SNAPSHOT version
* @param qualifier the qualifier
*/
public Version(int[] components, String qualifier) {
this.components = components == null ? null : components.clone();
this.qualifier = qualifier;
}
/**
* Constructor that parses the version from a string. The version must have the
* following format:
*
* integer ( "." integer )* ( "-" qualifier )?
*
*
* @param versionString the string representation of the version
* @throws ParseException if the version is not in the correct format
*/
public Version(String versionString) throws ParseException {
if (versionString.equals(S_SNAPSHOT)) {
components = null;
qualifier = S_SNAPSHOT;
} else {
int dashIndex = versionString.indexOf('-');
if (dashIndex != -1) {
qualifier = versionString.substring(dashIndex + 1);
versionString = versionString.substring(0, dashIndex);
} else {
qualifier = null;
}
String[] componentStrings = versionString.split("\\.");
int l = componentStrings.length;
components = new int[l];
for (int i=0; i0) {
buffer.append('.');
}
buffer.append(components[i]);
}
}
if (qualifier != null) {
if (components != null) {
buffer.append('-');
}
buffer.append(qualifier);
}
return buffer.toString();
}
public int compareTo(Version o) {
// components == null means SNAPSHOT and SNAPSHOT is always
// assumed to be the most recent version
if (components == null && o.components != null) {
return 1;
} else if (components != null && o.components == null) {
return -1;
} else if (components == null && o.components == null) {
return 0;
}
// Now compare version components
int l = Math.min(components.length, o.components.length);
for (int i=0; i