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Adapter Eclipse JSON library com.eclipsesource.minimal-json:minimal-json:jar to easyjson
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/*
 * Copyright 2019 the original author or authors.
 *
 * Licensed under the Apache, 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.gnu.org/licenses/lgpl-3.0.html
 *
 * 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.
 */

package com.eclipsesource.json;

import com.jn.easyjson.core.JsonTreeNode;
import com.jn.easyjson.core.node.*;

import java.util.Map;

public class JsonMapper {

    public static JsonValue fromJsonTreeNode(JsonTreeNode treeNode) {
        return (JsonValue) JsonTreeNodes.toXxxJson(treeNode, new ToXxxJsonMapper() {
            @Override
            public JsonValue mappingNull(JsonNullNode node) {
                return Json.NULL;
            }

            @Override
            public JsonValue mappingPrimitive(JsonPrimitiveNode primitiveNode) {
                if (primitiveNode.isBoolean()) {
                    return primitiveNode.getAsBoolean() ? Json.TRUE : Json.FALSE;
                }
                if (primitiveNode.isString()) {
                    return new JsonString(primitiveNode.getAsString());
                }
                if (primitiveNode.isNumber()) {
                    return new JsonNumber(primitiveNode.getAsString());
                }
                return Json.NULL;
            }

            @Override
            public JsonArray mappingArray(JsonArrayNode arrayNode) {
                JsonArray jsonArray = new JsonArray();
                for (JsonTreeNode node : arrayNode) {
                    jsonArray.add((JsonValue) JsonTreeNodes.toXxxJson(node, this));
                }
                return jsonArray;
            }

            @Override
            public JsonObject mappingObject(JsonObjectNode objectNode) {
                JsonObject jsonObject = new JsonObject();
                for (Map.Entry entry : objectNode.propertySet()) {
                    jsonObject.add(entry.getKey(), (JsonValue) JsonTreeNodes.toXxxJson(entry.getValue(), this));
                }
                return jsonObject;
            }
        });
    }


    public static JsonTreeNode toJsonTreeNode(JsonValue jsonValue) {
        if (isNull(jsonValue)) {
            return JsonNullNode.INSTANCE;
        }

        if (jsonValue instanceof JsonLiteral) {
            return new JsonPrimitiveNode(jsonValue.asBoolean());
        }

        if (jsonValue instanceof JsonString) {
            return new JsonPrimitiveNode(jsonValue.asString());
        }

        if (jsonValue instanceof JsonNumber) {
            return new JsonPrimitiveNode(jsonValue.asDouble());
        }

        if (jsonValue instanceof JsonArray) {
            JsonArray jsonArray = (JsonArray) jsonValue;
            JsonArrayNode arrayNode = new JsonArrayNode(jsonArray.size());
            for (JsonValue item : jsonArray) {
                arrayNode.add(toJsonTreeNode(item));
            }
            return arrayNode;
        }

        if (jsonValue instanceof JsonObject) {
            JsonObject jsonObject = (JsonObject) jsonValue;
            JsonObjectNode objectNode = new JsonObjectNode();
            for (JsonObject.Member member : jsonObject) {
                objectNode.addProperty(member.getName(), toJsonTreeNode(member.getValue()));
            }
            return objectNode;
        }

        return JsonTreeNodes.toJsonTreeNode(jsonValue);
    }

    private static boolean isNull(JsonValue jsonValue) {
        return jsonValue == null || jsonValue.isNull();
    }

}