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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.nest.internal.sdm.dto;
  14
  15 import static org.openhab.binding.nest.internal.sdm.dto.SDMGson.GSON;
  16
  17 import java.io.BufferedReader;
  18 import java.io.FileInputStream;
  19 import java.io.FileNotFoundException;
  20 import java.io.IOException;
  21 import java.io.InputStream;
  22 import java.io.InputStreamReader;
  23 import java.io.Reader;
  24 import java.io.StringWriter;
  25 import java.nio.charset.StandardCharsets;
  26 import java.util.stream.Collectors;
  27
  28 import org.eclipse.jdt.annotation.NonNullByDefault;
  29
  30 import com.google.gson.stream.JsonWriter;
  31
  32 /**
  33  * Utility class for working with Nest SDM test data in unit tests.
  34  *
  35  * @author Wouter Born - Initial contribution
  36  */
  37 @NonNullByDefault
  38 public class SDMDataUtil {
  39
  40     public static Reader openDataReader(String fileName) throws FileNotFoundException {
  41         String packagePath = (SDMDataUtil.class.getPackage().getName()).replaceAll("\\.", "/");
  42         String filePath = "src/test/resources/" + packagePath + "/" + fileName;
  43
  44         InputStream inputStream = new FileInputStream(filePath);
  45         return new InputStreamReader(inputStream, StandardCharsets.UTF_8);
  46     }
  47
  48     public static <T> T fromJson(String fileName, Class<T> dataClass) throws IOException {
  49         try (Reader reader = openDataReader(fileName)) {
  50             return GSON.fromJson(reader, dataClass);
  51         }
  52     }
  53
  54     public static String fromFile(String fileName) throws IOException {
  55         try (Reader reader = openDataReader(fileName)) {
  56             return new BufferedReader(reader).lines().parallel().collect(Collectors.joining("\n"));
  57         }
  58     }
  59
  60     public static String toJson(Object object) {
  61         StringWriter writer = new StringWriter();
  62         JsonWriter jsonWriter = new JsonWriter(writer);
  63         jsonWriter.setIndent("  ");
  64         GSON.toJson(object, object.getClass(), jsonWriter);
  65         return writer.toString();
  66     }
  67 }