diff options
Diffstat (limited to 'framework/src/onos/protocols/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/utils/VersionUtil.java')
-rw-r--r-- | framework/src/onos/protocols/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/utils/VersionUtil.java | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/framework/src/onos/protocols/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/utils/VersionUtil.java b/framework/src/onos/protocols/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/utils/VersionUtil.java new file mode 100644 index 00000000..d05d90ed --- /dev/null +++ b/framework/src/onos/protocols/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/utils/VersionUtil.java @@ -0,0 +1,69 @@ +/* + * Copyright 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.ovsdb.rfc.utils; + +/** + * Version utility class. + */ +public final class VersionUtil { + + /** + * Constructs a VersionUtil object. Utility classes should not have a public + * or default constructor, otherwise IDE will compile unsuccessfully. This + * class should not be instantiated. + */ + private VersionUtil() { + } + + public static final String DEFAULT_VERSION_STRING = "0.0.0"; + private static final String FORMAT = "(\\d+)\\.(\\d+)\\.(\\d+)"; + + /** + * Match version by the format. + * @param version the version String + * @throws IllegalArgumentException this is an illegal argument exception + */ + public static void versionMatch(String version) { + if (!version.matches(FORMAT)) { + throw new IllegalArgumentException("<" + version + + "> does not match format " + FORMAT); + } + } + + /** + * Compare fromVersion and toVersion. + * @param fromVersion the initial version + * @param toVersion the end of the version + * @return an int number + */ + public static int versionCompare(String fromVersion, String toVersion) { + String[] fromArr = fromVersion.split("\\."); + String[] toArr = toVersion.split("\\."); + int fromFirst = Integer.parseInt(fromArr[0]); + int fromMiddle = Integer.parseInt(fromArr[1]); + int fromEnd = Integer.parseInt(fromArr[2]); + int toFirst = Integer.parseInt(toArr[0]); + int toMiddle = Integer.parseInt(toArr[1]); + int toEnd = Integer.parseInt(toArr[2]); + if (fromFirst - toFirst != 0) { + return fromFirst - toFirst; + } else if (fromMiddle - toMiddle != 0) { + return fromMiddle - toMiddle; + } else { + return fromEnd - toEnd; + } + } +} |