Generating Spark Dataset<Row> from json string

gistfile1.java

  ArrayNode rootNode = (ArrayNode)objectMapper.readTree(input);
  ObjectNode rootObject = (ObjectNode)rootNode.get(0);
  ArrayList<StructField> stfList = new ArrayList<>();
  ArrayList<String> values = new ArrayList<>();
  rootObject.fields().forEachRemaining(e -> {
    stfList.add(new StructField(e.getKey(), DataTypes.StringType, false, Metadata.empty()));
    values.add(e.getValue().asText());
  });
  StructType st = new StructType(stfList.toArray(new StructField[] {}));
  Row r0w = new GenericRow(values.toArray(new String[] {}));
  List<Row> rows = new ArrayList<>();
  rows.add(r0w);
  Dataset<Row> df = spark.createDataFrame(rows, st);
  df.show();