# Stored fields and SearchResponse **URL:** \ **Category:** Elasticsearch\ **Tags:** language-clients\ **Created:** [August 31, 2023, 2:40pm UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062 "2023-08-31T14:40:35Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![toddcarv](https://avatars.discourse-cdn.com/v4/letter/t/779978/32.png) [@toddcarv](https://discuss.elastic.co/u/toddcarv)\ **Post date:** [August 31, 2023, 2:40pm UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062/1 "2023-08-31T14:40:35Z")
Example: ```auto SearchResponse searchResponse = elasticsearchClient.search(searchRequest, ObjectNode.class); Hit hit = searchResponse.hits().hits().get(0); Map fields = hit.fields(); JsonData data = fields.get("somefield"); ``` What is the correct way to turn 'data' into a json string for further processing? ---
**Author:** ![carly.richmond](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/carly.richmond/32/104935_2.png) [@carly.richmond](https://discuss.elastic.co/u/carly.richmond)\ **Post date:** [September 1, 2023, 9:53am UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062/2 "2023-09-01T09:53:52Z")
Hi @toddcarv, Per chance are you using the [Elasticsearch Java client](https://artifacts.elastic.co/javadoc/co/elastic/clients/elasticsearch-java/8.1.0/co/elastic/clients/json/JsonData.html)? Have you tried looking at the [`JsonpMapper`](https://artifacts.elastic.co/javadoc/co/elastic/clients/elasticsearch-java/8.1.0/co/elastic/clients/json/JsonpMapper.html) to convert `data` into an object for further processing [as suggested in the documentation](https://artifacts.elastic.co/javadoc/co/elastic/clients/elasticsearch-java/8.1.0/co/elastic/clients/json/JsonData.html)? > A raw JSON value. It can be converted to a JSON node tree or to an arbitrary object using a [`JsonpMapper`](https://artifacts.elastic.co/javadoc/co/elastic/clients/elasticsearch-java/8.1.0/co/elastic/clients/json/JsonpMapper.html). ---
**Author:** ![toddcarv](https://avatars.discourse-cdn.com/v4/letter/t/779978/32.png) [@toddcarv](https://discuss.elastic.co/u/toddcarv)\ **Post date:** [September 5, 2023, 2:39pm UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062/3 "2023-09-05T14:39:39Z")
Thanks. Yes I'm using the Java client. And yes I read the doc. It also says " Instances of this class returned by API clients keep a reference to the client's [`JsonpMapper`](https://artifacts.elastic.co/javadoc/co/elastic/clients/elasticsearch-java/8.1.0/co/elastic/clients/json/JsonpMapper.html) and can be converted to arbitrary types using [`to(Class)`](https://artifacts.elastic.co/javadoc/co/elastic/clients/elasticsearch-java/8.1.0/co/elastic/clients/json/JsonData.html#to(java.lang.Class)) without requiring an explicit mapper." I ran a test and I'm able to use the following to get the json string from a JsonData. ```auto String json = fields.get("thefield").toJson().toString(); ``` Using this doesn't seem to work: ```auto String json = fields.get("thefield").to(String.class); ``` ---
**Author:** ![carly.richmond](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/carly.richmond/32/104935_2.png) [@carly.richmond](https://discuss.elastic.co/u/carly.richmond)\ **Post date:** [September 5, 2023, 2:50pm UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062/4 "2023-09-05T14:50:49Z")
Looking at the JavaDoc for `to(Class)` it states that you need to specify a mapper: > Converts this object to a target class. A mapper must have been provided at creation time. > Throws: > `java.lang.IllegalStateException` - if no mapper was provided at creation time. Can you see if specifying an explicit mapper works? ---
**Author:** ![toddcarv](https://avatars.discourse-cdn.com/v4/letter/t/779978/32.png) [@toddcarv](https://discuss.elastic.co/u/toddcarv)\ **Post date:** [September 5, 2023, 3:00pm UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062/5 "2023-09-05T15:00:34Z")
Am I missing something? It says I shouldn't have to if the instance was returned by the API client - whiich it was. ---
**Author:** ![carly.richmond](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/carly.richmond/32/104935_2.png) [@carly.richmond](https://discuss.elastic.co/u/carly.richmond)\ **Post date:** [September 5, 2023, 3:22pm UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062/6 "2023-09-05T15:22:26Z")
I'm slightly confused myself. Can you share the link to the location in the docs where it says an explicit mapper isn't needed? ---
**Author:** ![toddcarv](https://avatars.discourse-cdn.com/v4/letter/t/779978/32.png) [@toddcarv](https://discuss.elastic.co/u/toddcarv)\ **Post date:** [September 5, 2023, 3:28pm UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062/7 "2023-09-05T15:28:30Z")
From two posts ago: > [@toddcarv](#): > > without requiring an explicit mapper > **[JsonData (java-client 8.1.0 API)](https://artifacts.elastic.co/javadoc/co/elastic/clients/elasticsearch-java/8.1.0/co/elastic/clients/json/JsonData.html)** > > declaration: package: co.elastic.clients.json, interface: JsonData ---
**Author:** ![toddcarv](https://avatars.discourse-cdn.com/v4/letter/t/779978/32.png) [@toddcarv](https://discuss.elastic.co/u/toddcarv)\ **Post date:** [September 5, 2023, 7:00pm UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062/8 "2023-09-05T19:00:34Z")
Specifically I'm trying to figure out how do access the value of a stored field. It used to be like this with the HLRC: ```auto DocumentField field = fields.get("thefield"); String value = field.getValue(); ``` Now? ```auto JsonData jsonData = fields.get("thefield"); // How to get the first string value? ``` ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [October 3, 2023, 7:01pm UTC](https://discuss.elastic.co/t/stored-fields-and-searchresponse/342062/9 "2023-10-03T19:01:21Z")
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