jaegonkim | dcf7c82 | 2019-02-06 15:00:14 +0900 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2019-present Open Networking Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.ofoverlay.impl.util; |
| 17 | |
| 18 | import org.slf4j.Logger; |
| 19 | import org.slf4j.LoggerFactory; |
| 20 | |
| 21 | import java.util.regex.Matcher; |
| 22 | import java.util.regex.Pattern; |
| 23 | |
| 24 | /** |
| 25 | * Class for OVS Version. |
| 26 | */ |
| 27 | public final class OvsVersion { |
| 28 | protected static final Logger log = LoggerFactory.getLogger(OvsVersion.class); |
| 29 | |
| 30 | private int[] versionElements = new int[] {0, 0, 0, Integer.MAX_VALUE}; |
| 31 | private int depth = 0; |
| 32 | |
| 33 | /** |
| 34 | * Constructor for OvsVersion. |
| 35 | * @param ovsVerStr OVS version string |
| 36 | */ |
| 37 | private OvsVersion(String ovsVerStr) { |
| 38 | |
| 39 | // Supporting |
| 40 | // 1.2.3 (depth = 3, public release) |
| 41 | // 1.2.3.4 (depth = 4, beta release) |
| 42 | Matcher m = Pattern.compile("(\\d+)\\.(\\d+)\\.(\\d+)(\\.(\\d+))?").matcher(ovsVerStr); |
| 43 | |
| 44 | if (!m.matches()) { |
| 45 | throw new IllegalArgumentException("Malformed OVS version"); |
| 46 | } |
| 47 | |
| 48 | versionElements[0] = Integer.parseInt(m.group(1)); |
| 49 | versionElements[1] = Integer.parseInt(m.group(2)); |
| 50 | versionElements[2] = Integer.parseInt(m.group(3)); |
| 51 | |
| 52 | if (m.group(4) == null) { |
| 53 | depth = 3; |
| 54 | return; |
| 55 | } |
| 56 | |
| 57 | versionElements[3] = Integer.parseInt(m.group(5)); |
| 58 | depth = 4; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Builder for OvsVersion. |
| 63 | * @param ovsVersionStr OVS version string |
| 64 | * @return ovs version |
| 65 | */ |
| 66 | public static OvsVersion build(String ovsVersionStr) { |
| 67 | try { |
| 68 | return new OvsVersion(ovsVersionStr); |
| 69 | } catch (IllegalArgumentException e) { |
| 70 | log.error("Exception Occurred {}", e); |
| 71 | return null; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | private int get(int level) { |
| 76 | return versionElements[level]; |
| 77 | } |
| 78 | |
| 79 | private int compare(OvsVersion tgt) { |
| 80 | //Comparison example |
| 81 | // 2.7.0 < 2.7.2 |
| 82 | // 2.7.0 > 2.6.9.12 |
| 83 | // 2.7.0 > 2.7.0.0 (because 2.7.0 is public release) |
| 84 | for (int i = 0; i < versionElements.length; i++) { |
| 85 | if (versionElements[i] == tgt.get(i)) { |
| 86 | continue; |
| 87 | } else if (versionElements[i] < tgt.get(i)) { |
| 88 | return (i + 1) * -1; |
| 89 | } else { |
| 90 | return (i + 1); |
| 91 | } |
| 92 | } |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Returns whether this OVS version is equal to the target OVS version. |
| 98 | * @param tgt taret OVS version |
| 99 | * @return whether this OVS version is equal to the target OVS version |
| 100 | */ |
| 101 | public boolean isEqOf(OvsVersion tgt) { |
| 102 | return (compare(tgt) == 0); |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Returns whether this OVS version is prior to the target OVS version. |
| 107 | * @param tgt taret OVS version |
| 108 | * @return whether this OVS version is prior to the target OVS version |
| 109 | */ |
| 110 | public boolean isPriorOf(OvsVersion tgt) { |
| 111 | return (compare(tgt) < 0); |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Returns whether this OVS version is prior or equal to the target OVS version. |
| 116 | * @param tgt taret OVS version |
| 117 | * @return whether this OVS version is prior or equal to the target OVS version |
| 118 | */ |
| 119 | public boolean isPriorOrEqOf(OvsVersion tgt) { |
| 120 | return (compare(tgt) <= 0); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Returns whether this OVS version is later to the target OVS version. |
| 125 | * @param tgt taret OVS version |
| 126 | * @return whether this OVS version is later to the target OVS version |
| 127 | */ |
| 128 | public boolean isLaterOf(OvsVersion tgt) { |
| 129 | return (compare(tgt) > 0); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Returns whether this OVS version is later or equal to the target OVS version. |
| 134 | * @param tgt taret OVS version |
| 135 | * @return whether this OVS version is later or equal to the target OVS version |
| 136 | */ |
| 137 | public boolean isLaterOrEqOf(OvsVersion tgt) { |
| 138 | return (compare(tgt) >= 0); |
| 139 | } |
| 140 | |
| 141 | @Override |
| 142 | public String toString() { |
| 143 | |
| 144 | StringBuilder strbuild = new StringBuilder(); |
| 145 | strbuild.append(versionElements[0]); |
| 146 | |
| 147 | for (int i = 1; i < depth; i++) { |
| 148 | strbuild.append("."); |
| 149 | strbuild.append(versionElements[i]); |
| 150 | } |
| 151 | return strbuild.toString(); |
| 152 | } |
| 153 | |
| 154 | } |