--- /dev/null
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 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=========================================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+
+package org.onap.aai.edges;
+
+/**
+ * Helper class to produce alphabetized keys for EdgeIngestor and EdgeValidator
+ */
+public class TypeAlphabetizer {
+ /**
+ * Builds key for edge rules, where nodetypes are alphabetically sorted
+ * (ignoring dashes).
+ *
+ * @param nodeA - first nodetype
+ * @param nodeB - second nodetype
+ * @return {alphabetically first nodetype}|{alphabetically second nodetype}
+ * ex: buildAlphabetizedKey("l-interface", "logical-link") -> "l-interface|logical-link"
+ * buildAlphabetizedKey("logical-link", "l-interface") -> "l-interface|logical-link"
+ *
+ * This is alphabetical order to normalize the keys, as sometimes there will be multiple
+ * rules for a pair of node types but the from/to value in the json is flipped for some of them.
+ */
+ public String buildAlphabetizedKey(String nodeA, String nodeB) {
+ if (nodeA == null) {
+ nodeA = "";
+ }
+ if (nodeB == null) {
+ nodeB = "";
+ }
+
+ //normalize
+ String normalizedNodeA = nodeA.replace("-", "");
+ String normalizedNodeB = nodeB.replace("-", "");
+ int cmp = normalizedNodeA.compareTo(normalizedNodeB);
+
+ StringBuilder sb = new StringBuilder();
+ if (cmp <= 0) {
+ sb.append(nodeA);
+ sb.append("|");
+ sb.append(nodeB);
+ } else {
+ sb.append(nodeB);
+ sb.append("|");
+ sb.append(nodeA);
+ }
+ return sb.toString();
+ }
+}