2 * ========================LICENSE_START=================================
5 * Copyright (C) 2019 Nordix Foundation
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ========================LICENSE_END===================================
21 package org.oransc.policyagent.clients;
23 import com.google.gson.FieldNamingPolicy;
24 import com.google.gson.Gson;
25 import com.google.gson.GsonBuilder;
26 import java.util.ArrayList;
27 import java.util.List;
28 import org.json.JSONArray;
29 import org.json.JSONException;
30 import org.json.JSONObject;
31 import reactor.core.publisher.Flux;
32 import reactor.core.publisher.Mono;
34 public class JsonHelper {
35 private static Gson gson = new GsonBuilder() //
36 .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_DASHES) //
39 private JsonHelper() {
43 public static Flux<String> parseJsonArrayOfString(String inputString) {
45 List<String> arrayList = new ArrayList<>();
46 if (!inputString.isEmpty()) {
47 JSONArray jsonArray = new JSONArray(inputString);
48 for (int i = 0; i < jsonArray.length(); i++) {
49 arrayList.add(jsonArray.getString(i));
52 return Flux.fromIterable(arrayList);
53 } catch (JSONException ex) { // invalid json
54 return Flux.error(ex);
58 public static <T> String createInputJsonString(T params) {
59 JSONObject inputJson = new JSONObject();
60 inputJson.put("input", gson.toJson(params));
61 return inputJson.toString();
64 public static Mono<String> getValueFromResponse(String response, String key) {
66 JSONObject outputJson = new JSONObject(response);
67 JSONObject responseParams = outputJson.getJSONObject("output");
68 if (!responseParams.has(key)) {
71 String value = responseParams.get(key).toString();
72 return Mono.just(value);
73 } catch (JSONException ex) { // invalid json
74 return Mono.error(ex);
78 public static Mono<String> extractPolicySchema(String inputString) {
80 JSONObject jsonObject = new JSONObject(inputString);
81 JSONObject schemaObject = jsonObject.getJSONObject("policySchema");
82 String schemaString = schemaObject.toString();
83 return Mono.just(schemaString);
84 } catch (JSONException ex) { // invalid json
85 return Mono.error(ex);
89 public static Mono<String> validateJson(String inputString) {
91 new JSONObject(inputString);
92 return Mono.just(inputString);
93 } catch (JSONException ex) { // invalid json
94 return Mono.error(ex);