2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Copyright (C) 2017 Amdocs
8 * =============================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
21 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
22 * ============LICENSE_END=========================================================
26 package org.onap.appc.seqgen.impl;
28 import org.onap.appc.domainmodel.lcm.VNFOperation;
29 import org.onap.appc.exceptions.APPCException;
30 import org.onap.appc.seqgen.SequenceGenerator;
32 public class SequenceGeneratorFactory {
34 private static class ReferenceHolder {
35 private static SequenceGeneratorFactory instance = new SequenceGeneratorFactory();
36 private ReferenceHolder(){
41 private SequenceGeneratorFactory(){
45 public static SequenceGeneratorFactory getInstance(){
46 return ReferenceHolder.instance;
49 public SequenceGenerator createSequenceGenerator(VNFOperation operation) throws APPCException {
52 return new StartSequenceGenerator();
54 return new StopSequenceGenerator();
56 return new RestartSequenceGenerator();
58 throw new APPCException("Sequence Generator does not support operation " + operation.name());