Read the Headers in the index using Elasticsearch Java API

Elastic Stack Elasticsearch
1

Hi,

I'm using Elasticsearch Java API 2.4.2 to fetch the data from Elasticsearch. Currently, by using the following code, I'm able to get the headers but what I need is to fetch the headers based on the data types of the field.

 Set<String> fieldSet = new HashSet<String>();
 BoolQueryBuilder query = new BoolQueryBuilder();

 SearchRequestBuilder req = client.prepareSearch(idxName).setSearchType(SearchType.DFS_QUERY_THEN_FETCH);
	SearchResponse response = req.setQuery(query).execute().actionGet();
	for(SearchHit hit : response.getHits()){
		fieldSet.addAll(hit.getSource().keySet());
		break;
	}

for example, If there is a field AGE (INT) with integer data type, it should be added to numericalFieldSet, if it is a String, then add that header to fieldSet.
Any help would be appreciated.
Thanks,
Sanjay Reddy.

2

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