2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2019 Nokia Intellectual Property. All rights
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END============================================
20 * ===================================================================
24 package org.onap.clamp.clds.sdc.controller.installer;
26 import java.util.LinkedList;
27 import java.util.List;
29 import java.util.stream.Collectors;
31 import org.springframework.stereotype.Component;
34 public class ChainGenerator {
39 public List<MicroService> getChainOfMicroServices(Set<MicroService> input) {
40 LinkedList<MicroService> returnList = new LinkedList<>();
41 if (preValidate(input)) {
42 LinkedList<MicroService> theList = new LinkedList<>();
43 for (MicroService ms : input) {
44 insertNodeTemplateIntoChain(ms, theList);
46 if (postValidate(theList)) {
53 private boolean preValidate(Set<MicroService> input) {
54 List<MicroService> noInputs = input.stream().filter(ms -> "".equals(ms.getInputFrom()))
55 .collect(Collectors.toList());
56 return noInputs.size() == 1;
59 private boolean postValidate(LinkedList<MicroService> microServices) {
60 for (int i = 1; i < microServices.size() - 1; i++) {
61 MicroService prev = microServices.get(i - 1);
62 MicroService current = microServices.get(i);
63 if (!current.getInputFrom().equals(prev.getName())) {
70 private void insertNodeTemplateIntoChain(MicroService microServicetoInsert,
71 LinkedList<MicroService> chainOfMicroServices) {
73 for (int i = 0; i < chainOfMicroServices.size(); i++) {
74 MicroService current = chainOfMicroServices.get(i);
75 if (microServicetoInsert.getName().equals(current.getInputFrom())) {
78 } else if (current.getName().equals(microServicetoInsert.getInputFrom())) {
83 chainOfMicroServices.add(insertIndex, microServicetoInsert);