1 /* Copyright (c) 2019 AT&T Intellectual Property. #
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3 # Licensed under the Apache License, Version 2.0 (the "License"); #
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4 # you may not use this file except in compliance with the License. #
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5 # You may obtain a copy of the License at #
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7 # http://www.apache.org/licenses/LICENSE-2.0 #
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9 # Unless required by applicable law or agreed to in writing, software #
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10 # distributed under the License is distributed on an "AS IS" BASIS, #
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11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. #
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12 # See the License for the specific language governing permissions and #
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13 # limitations under the License. #
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14 ##############################################################################*/
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17 package org.oran.otf.common.utility.gson;
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19 import com.fasterxml.jackson.core.type.TypeReference;
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20 import com.fasterxml.jackson.databind.DeserializationFeature;
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21 import com.fasterxml.jackson.databind.ObjectMapper;
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22 import com.google.gson.Gson;
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23 import com.google.gson.GsonBuilder;
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24 import com.google.gson.JsonDeserializationContext;
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25 import com.google.gson.JsonDeserializer;
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26 import com.google.gson.JsonElement;
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27 import com.google.gson.JsonParseException;
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28 import com.google.gson.JsonPrimitive;
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29 import com.google.gson.JsonSerializationContext;
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30 import com.google.gson.JsonSerializer;
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31 import com.google.gson.reflect.TypeToken;
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33 import java.io.IOException;
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34 import java.lang.reflect.Type;
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35 import java.util.ArrayList;
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36 import java.util.Arrays;
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37 import java.util.Collection;
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38 import java.util.HashMap;
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39 import java.util.List;
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40 import java.util.Map;
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41 import org.bson.types.ObjectId;
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43 public class Convert {
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45 private static final GsonBuilder gsonBuilder =
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47 .setDateFormat("yyyy-MM-dd'T'HH:mm:ssZ")
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48 .registerTypeAdapter(
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50 new JsonSerializer<ObjectId>() {
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52 public JsonElement serialize(
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53 ObjectId src, Type typeOfSrc, JsonSerializationContext context) {
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54 return new JsonPrimitive(src.toHexString());
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57 .registerTypeAdapter(
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59 new JsonDeserializer<ObjectId>() {
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61 public ObjectId deserialize(
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62 JsonElement json, Type typeOfT, JsonDeserializationContext context)
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63 throws JsonParseException {
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64 return new ObjectId(json.getAsString());
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68 public static Gson getGson() {
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69 return gsonBuilder.create();
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72 public static String mapToJson(Map map) {
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73 if (map.isEmpty()) {
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76 return getGson().toJson(map);
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79 public static String listToJson(List list) {
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80 if (list.isEmpty()) {
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83 return getGson().toJson(list);
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86 public static Map<String, Object> jsonToMap(String json) {
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87 Type type = new TypeToken<HashMap<String, Object>>() {
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89 return getGson().fromJson(json, type);
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92 public static String objectToJson(Object obj) {
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93 return getGson().toJson(obj);
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96 public static <T> T jsonToObject(String json, TypeReference<T> typeReference) throws IOException {
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97 ObjectMapper objectMapper = new ObjectMapper();
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99 .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true);
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100 return objectMapper.readValue(json, typeReference);
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103 public static<T> T mapToObject(Map map, TypeReference<T> typeReference) throws IOException {
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104 return jsonToObject(mapToJson(map), typeReference);
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107 public static<T> T listToObjectList(List list, TypeReference<T> typeReference) throws IOException {
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108 return jsonToObject(listToJson(list), typeReference);
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111 public static List<?> convertObjectToList(Object obj) {
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112 List<?> list = new ArrayList<>();
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113 if (obj.getClass().isArray()) {
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114 list = Arrays.asList((Object[])obj);
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115 } else if (obj instanceof Collection) {
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116 list = new ArrayList<>((Collection<?>)obj);
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