ElasticSearch Jest client, how to return document id from hit?

Just fyi, was looking for same so took a look at Jest source code and saw that Jest does populate hit.source.es_metadata_id with the "_id" if it exists (see io.searchbox.core.SearchResult, line 115)

So could do something like following as alternative to annotation:

List<Hit<Map,Void>> hits = client.execute(search).getHits(Map.class)Hit hit = hits.get(0)Map source = (Map)hit.sourceString id = (String)source.get(JestResult.ES_METADATA_ID)

It seems no way to get _id via Jest API, have to get _id from _source object.

As @juliendangers mentioned, add @JestId annotation can achieve:

public class MyClass {    @JestId private String documentId;    private String foo;}

And must explicitly set document id:myClass.setDocumentId("some_id");

Each Hit object looks like:{"_index":"some_index","_type":"some_type","_id":"some_id","_score":2.609438,"_source":{"foo":"bar","documentId":"some_id"}}

(If not explicitly set document id, the "documentId":"some_id" pair will be missing from Hit)

While according to my test, if use inheritance, have to explicitly set parent class's document id:

public class ParentClass {    @JestId private String documentId;}public class MyClass extends ParentClass {    private String foo;    public MyClass() {        super.setDocumentId("some_id");    }}