--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APP-C
+ * ================================================================================
+ * 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.appc.seqgen.impl;
+
+import org.openecomp.appc.domainmodel.lcm.VNFOperation;
+import org.openecomp.appc.exceptions.APPCException;
+import org.openecomp.appc.seqgen.SequenceGenerator;
+
+public class SequenceGeneratorFactory {
+
+ private static class ReferenceHolder {
+ private static SequenceGeneratorFactory instance = new SequenceGeneratorFactory();
+ private ReferenceHolder(){
+
+ }
+ }
+
+ private SequenceGeneratorFactory(){
+
+ }
+
+ public static SequenceGeneratorFactory getInstance(){
+ return ReferenceHolder.instance;
+ }
+
+ public SequenceGenerator createSequenceGenerator(VNFOperation operation) throws APPCException {
+ switch (operation){
+ case Start:
+ return new StartSequenceGenerator();
+ case Stop:
+ return new StopSequenceGenerator();
+ default:
+ throw new APPCException("Sequence Generator does not support operation " + operation.name());
+ }
+ }
+}