/*
* Copyright 2016 The Apache Software Foundation.
*
* 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.apache.karaf.profile.versioning;
public class VersionUtils {
private static final String SNAPSHOT = "SNAPSHOT";
private static final char DELIM_DASH = '-';
private static final char DELIM_DOT = '.';
private static final String EMPTY_VERSION = "0.0.0";
private VersionUtils() {
}
public static boolean versionEquals(String versionOne, String versionTwo) {
if (isSnapshotVersion(versionOne) && isSnapshotVersion(versionTwo)) {
// If both (and only if both) versions are snapshots, we compare without the snapshot classifier.
// This is done to consider e.g. 1.2.0.SNAPSHOT and 1.2.SNAPSHOT equal.
versionOne = versionWithoutSnapshot(versionOne);
versionTwo = versionWithoutSnapshot(versionTwo);
}
// Create comparable version objects.
final ComparableVersion cvOne = new ComparableVersion(versionOne);
final ComparableVersion cvTwo = new ComparableVersion(versionTwo);
// Use equals of comparable version class.
return cvOne.equals(cvTwo);
}
/**
* Check if a version is a snapshot version.
*
* @param version the version to check
* @return true if {@code version} refers a snapshot version otherwise false
*/
protected static boolean isSnapshotVersion(final String version) {
return version.endsWith(SNAPSHOT);
}
/**
* Remove the snapshot classifier at the end of a version.
*
* @param version the version
* @return the given {@code version} without the snapshot classifier
*/
protected static String versionWithoutSnapshot(final String version) {
int idx;
idx = version.lastIndexOf(SNAPSHOT);
if (idx < 0) {
return version;
} else if (idx == 0) {
return EMPTY_VERSION;
} else {
final char delim = version.charAt(idx - 1);
if (delim == DELIM_DOT || delim == DELIM_DASH) {
--idx;
}
return version.substring(0, idx);
}
}
}