java-utilities/src/main/java/com/gmgauthier/JsonUtils.java

package com.gmgauthier;

import com.google.gson.Gson;
import com.google.gson.JsonObject;
import io.cucumber.datatable.DataTable;
import kong.unirest.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class JsonUtils {
    public static JSONObject getJsonFromGson(JsonObject gJsonObject) {
        return new JSONObject(gJsonObject.toString());
    }

    public static JSONObject getJsonFromDataTable(DataTable dataTable) {
        List<Map<String, String>> tableDetails =
                dataTable.transpose().asMaps(String.class, String.class);
        String bodyString = new Gson().toJson(tableDetails.get(0)); //root element
        return new JSONObject(bodyString);
    }

    public static JsonObject getFixtureDataFrom(String filename) throws IOException {
        String json = getJsonAsString(filename);
        return new Gson().fromJson(json, JsonObject.class);
    }

    private static String getJsonAsString(String filename) throws IOException {
        InputStream inputStream =
                JsonUtils.class
                        .getResourceAsStream(
                                String.format("/com/gmgauthier/fixtures/%s.json",filename));
        if (inputStream != null)
            return new BufferedReader(new InputStreamReader(inputStream))
                    .lines().collect(Collectors.joining(System.lineSeparator()));
        else throw new IOException("%s.json not found, or has no content.");
    }
}