How to Convert String To Dataset

I am getting a value in Json Format and Assigned it into a String.
In Java, How can i Convert a String Value into a Data Set of Ignition. And
how do i Convert a Json Object to Data Set?

postRequest.addHeader(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.toString());
ObjectMapper mapper = new ObjectMapper();
HttpEntity entity;
entity = new StringEntity(mapper.writeValueAsString(context), ContentType.APPLICATION_JSON);
CloseableHttpResponse httpResponse = null; 
httpResponse = httpClient.execute(postRequest); 
String response = null;
response = EntityUtils.toString(httpResponse.getEntity());
AnalysisData = response;
Dataset dataset = Dataset.class.cast(vAnalysisData);

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