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authorliamfallon <liam.fallon@est.tech>2019-04-04 13:26:58 +0000
committerliamfallon <liam.fallon@est.tech>2019-04-04 13:26:58 +0000
commit2128942b95031180c9fab063fb43b8a710d1cdfe (patch)
treedac64e4ed64404ac34f92ab2e0fed7949a1e7a08 /utils/src/main
parent21e6fdea3e207ae7c690158ddc336bd7c0785b15 (diff)
Add semantic version comparable class
Class written by Jim Hahn that implements Comparable for comparing semantic versions. Lifted from policy models pap. Issue-ID: POLICY-1095 Change-Id: Ie8c5f9066c06cb569085e1390b3de3e4aa580267 Signed-off-by: liamfallon <liam.fallon@est.tech>
Diffstat (limited to 'utils/src/main')
-rw-r--r--utils/src/main/java/org/onap/policy/common/utils/validation/Version.java113
1 files changed, 113 insertions, 0 deletions
diff --git a/utils/src/main/java/org/onap/policy/common/utils/validation/Version.java b/utils/src/main/java/org/onap/policy/common/utils/validation/Version.java
new file mode 100644
index 00000000..b5769948
--- /dev/null
+++ b/utils/src/main/java/org/onap/policy/common/utils/validation/Version.java
@@ -0,0 +1,113 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP COMMON
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * Modifications Copyright (C) 2019 Nordix 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.utils.validation;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.RequiredArgsConstructor;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Version of an object within the model. Versions are assumed to be of the form: major or
+ * major.minor.patch, where each component is numeric.
+ */
+@Data
+@RequiredArgsConstructor
+@NoArgsConstructor(force = true)
+public class Version implements Comparable<Version> {
+ private static final Logger logger = LoggerFactory.getLogger(Version.class);
+
+ /**
+ * Pattern to match a version of the form, major or major.minor.patch, where all
+ * components are numeric.
+ */
+ private static final Pattern VERSION_PAT = Pattern.compile("(\\d+)([.](\\d+)[.](\\d+))?");
+
+ private final int major;
+ private final int minor;
+ private final int patch;
+
+
+ /**
+ * Creates a version object.
+ *
+ * @param type type of object with which the version is associated, used when logging
+ * @param name name with which the version is associated, used when logging
+ * @param versionText the version, in textual form
+ * @return a new version, or {@code null} if the version cannot be created from the
+ * key (e.g., the key has a version that does not match the major.minor.patch
+ * form)
+ */
+ public static Version makeVersion(String type, String name, String versionText) {
+ Matcher matcher = VERSION_PAT.matcher(versionText);
+ if (!matcher.matches()) {
+ logger.info("invalid version for {} {}: {}", type, name, versionText);
+ return null;
+ }
+
+ try {
+ if (matcher.group(2) == null) {
+ // form: major
+ return new Version(Integer.parseInt(matcher.group(1)), 0, 0);
+
+ } else {
+ // form: major.minor.patch
+ return new Version(Integer.parseInt(matcher.group(1)), Integer.parseInt(matcher.group(3)),
+ Integer.parseInt(matcher.group(4)));
+ }
+
+ } catch (NumberFormatException e) {
+ logger.info("invalid version for {} {}: {}", type, name, versionText, e);
+ return null;
+ }
+ }
+
+ /**
+ * Generates a new version from the current version.
+ *
+ * @return a new version, of the form major.0.0, where "major" is one more than "this"
+ * version's major number
+ */
+ public Version newVersion() {
+ return new Version(major + 1, 0, 0);
+ }
+
+ @Override
+ public int compareTo(Version other) {
+ int result = Integer.compare(major, other.major);
+ if (result != 0) {
+ return result;
+ }
+ if ((result = Integer.compare(minor, other.minor)) != 0) {
+ return result;
+ }
+ return Integer.compare(patch, other.patch);
+ }
+
+ @Override
+ public String toString() {
+ return major + "." + minor + "." + patch;
+ }
+} \ No newline at end of file