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/*-
* ============LICENSE_START=======================================================
* ONAP CLAMP
* ================================================================================
* Copyright (C) 2020 AT&T Intellectual Property. 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.
* ============LICENSE_END============================================
* ===================================================================
*
*/
package org.onap.clamp.util;
/**
* This class is the base class for object that requires semantic versioning.
* ... This class supports also a.b.c.d... etc ... as a version.
*/
public class SemanticVersioning {
public static final int BEFORE = -1;
public static final int EQUAL = 0;
public static final int AFTER = 1;
public static final String DEFAULT_VERSION = "1.0.0";
/**
* The compare method that compare arg0 to arg1.
*
* @param arg0 A version in string for semantic versioning (a.b.c.d...)
* @param arg1 A version in string for semantic versioning (a.b.c.d...)
* @return objects (arg0, arg1) given as parameters. It returns the value: 0: if
* (arg0==arg1) -1: if (arg0 < arg1) 1: if (arg0 > arg1)
*/
public static int compare(String arg0, String arg1) {
if (arg0 == null && arg1 == null) {
return EQUAL;
}
if (arg0 == null) {
return BEFORE;
}
if (arg1 == null) {
return AFTER;
}
String[] arg0Array = arg0.split("\\.");
String[] arg1Array = arg1.split("\\.");
int smalestStringLength = Math.min(arg0Array.length, arg1Array.length);
for (int currentVersionIndex =
0; currentVersionIndex < smalestStringLength; ++currentVersionIndex) {
if (Integer.parseInt(arg0Array[currentVersionIndex]) < Integer
.parseInt(arg1Array[currentVersionIndex])) {
return BEFORE;
} else if (Integer.parseInt(arg0Array[currentVersionIndex]) > Integer
.parseInt(arg1Array[currentVersionIndex])) {
return AFTER;
}
// equals, so do not return anything, continue
}
if (arg0Array.length == arg1Array.length) {
return EQUAL;
} else {
return Integer.compare(arg0Array.length, arg1Array.length);
}
}
/**
* Method to increment a version from its current version.
*
* @param currentVersion The current Version
* @return the increment version string
*/
public static String incrementMajorVersion(String currentVersion) {
if (currentVersion == null || currentVersion.isEmpty()) {
return DEFAULT_VERSION;
}
String[] versionArray = currentVersion.split("\\.");
return String.valueOf(Integer.parseInt(versionArray[0]) + 1) + ".0.0";
}
}
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