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authorAndreas Abraham <andreas.abraham@egiz.gv.at>2018-09-06 14:41:09 (GMT)
committerAndreas Abraham <andreas.abraham@egiz.gv.at>2018-09-06 14:41:09 (GMT)
commite7376591b62c80a59ad891e8926e831552f42019 (patch)
treea59c6ed331d9c6bd8adfacd117ae85abb8388aa1
parent9658c99816d7011412c191044565e286d84f57f8 (diff)
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imported version comparator added
-rw-r--r--utils/src/main/java/at/gv/egiz/upater/VersionComparator.java101
1 files changed, 101 insertions, 0 deletions
diff --git a/utils/src/main/java/at/gv/egiz/upater/VersionComparator.java b/utils/src/main/java/at/gv/egiz/upater/VersionComparator.java
new file mode 100644
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+++ b/utils/src/main/java/at/gv/egiz/upater/VersionComparator.java
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+/*
+ * Copyright 2012 by A-SIT, Secure Information Technology Center Austria
+ *
+ * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * http://joinup.ec.europa.eu/software/page/eupl
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ */
+package at.gv.egiz.upater;
+
+// Imports
+import java.util.Comparator;
+
+/**
+ *
+ */
+public class VersionComparator implements Comparator<String> {
+ /* (non-Javadoc)
+ * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
+ */
+ @Override
+ public int compare(String v1, String v2) {
+ String[] v1Parts = v1.split("\\.|-");
+ String[] v2Parts = v2.split("\\.|-");
+
+ int length = Math.max(v1Parts.length, v2Parts.length);
+ for (int i = 0; i < length; ++i) {
+ int v1Part = 0;
+ try {
+ if (i < v1Parts.length)
+ v1Part = Integer.parseInt(v1Parts[i]);
+ } catch (NumberFormatException e) {
+ if (v1Parts[i].equals("SNAPSHOT"))
+ v1Part = Integer.MAX_VALUE;
+ }
+
+ int v2Part = 0;
+ try {
+ if (i < v2Parts.length)
+ v2Part = Integer.parseInt(v2Parts[i]);
+ } catch (NumberFormatException e) {
+ if (v2Parts[i].equals("SNAPSHOT"))
+ v2Part = Integer.MAX_VALUE;
+ }
+
+ if (v1Part < v2Part)
+ return -1;
+ if (v1Part > v2Part)
+ return 1;
+ }
+ return 0;
+ }
+
+ /**
+ * Compare two version strings (static version)
+ * @param v1 version 1
+ * @param v2 version 2
+ * @return -1 if v1 &lt; v2, 0 if v1 = v2, 1 if v1 &gt; v2
+ */
+ public static int compare_s(String v1, String v2) {
+ VersionComparator vc = new VersionComparator();
+ return vc.compare(v1, v2);
+ }
+
+ /**
+ * Check two version strings for equality
+ * @param v1 version 1
+ * @param v2 version 2
+ * @return v1 == v2
+ */
+ public static boolean equals(String v1, String v2) {
+ return compare_s(v1, v2) == 0;
+ }
+
+ /**
+ * Check two version strings for order
+ * @param v1 version 1
+ * @param v2 version 2
+ * @return v1 &lt; v2
+ */
+ public static boolean before(String v1, String v2) {
+ return compare_s(v1, v2) < 0;
+ }
+
+ /**
+ * Check two version strings for order
+ * @param v1 version 1
+ * @param v2 version 2
+ * @return v1 &gt; v2
+ */
+ public static boolean after(String v1, String v2) {
+ return compare_s(v1, v2) > 0;
+ }
+}