1 files changed, 94 insertions, 0 deletions
diff --git a/catalog-model/src/main/java/org/openecomp/sdc/be/model/tosca/VersionUtil.java b/catalog-model/src/main/java/org/openecomp/sdc/be/model/tosca/VersionUtil.java
new file mode 100644
index 0000000000..91d806edd9
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+++ b/catalog-model/src/main/java/org/openecomp/sdc/be/model/tosca/VersionUtil.java
@@ -0,0 +1,94 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.openecomp.sdc.be.model.tosca;
+
+import java.util.regex.Pattern;
+
+import org.openecomp.sdc.be.model.tosca.version.ApplicationVersionException;
+import org.openecomp.sdc.be.model.tosca.version.Version;
+
+public final class VersionUtil {
+
+	/** Utility class should not have public constructor. */
+	private VersionUtil() {
+	}
+
+	/**
+	 * The version must begin with a bloc of numbers, and then it can have one
+	 * or more bloc of numbers separated by '.' and then it can have alpha
+	 * numeric bloc separated by '.' or '-'
+	 */
+	public static final Pattern VERSION_PATTERN = Pattern.compile("\\d+(?:\\.\\d+)*(?:[\\.-]\\p{Alnum}+)*");
+	private static final String SNAPSHOT_IDENTIFIER = "SNAPSHOT";
+
+	/**
+	 * Check if a version is a SNAPSHOT (development) version.
+	 * 
+	 * @param version
+	 *            The actual version string.
+	 * @return True if the version is a SNAPSHOT version, false if not (RELEASE
+	 *         version).
+	 */
+	public static boolean isSnapshot(String version) {
+		return version.toUpperCase().contains(SNAPSHOT_IDENTIFIER);
+	}
+
+	/**
+	 * Check if a version is valid
+	 * 
+	 * @param version
+	 *            version string to parse
+	 * @return true if it's following the defined version pattern
+	 */
+	public static boolean isValid(String version) {
+		return VERSION_PATTERN.matcher(version).matches();
+	}
+
+	/**
+	 * Parse the version's text to produce a comparable version object
+	 * 
+	 * @param version
+	 *            version text to parse
+	 * @return a comparable version object
+	 * @throws ApplicationVersionException
+	 *             if the version text is not following the defined version
+	 *             pattern
+	 */
+	public static Version parseVersion(String version) {
+		if (!isValid(version)) {
+			throw new ApplicationVersionException(
+					"This version is not valid [" + version + "] as it does not match [" + VERSION_PATTERN + "]");
+		} else {
+			return new Version(version);
+		}
+	}
+
+	/**
+	 * Compare 2 versions
+	 * 
+	 * @param versionLeft
+	 * @param versionRight
+	 * @return
+	 */
+	public static int compare(String versionLeft, String versionRight) {
+		return parseVersion(versionLeft).compareTo(parseVersion(versionRight));
+	}
+}