Elasticsearch Java API(七)－－多级嵌套搜索

要在java中实现一个有三级父子关系的嵌套搜索，相关资料很少，发在stackoverflow上以后一个Switzerland的大神很快回复了我，google＋stackoverflow很好使。对应的命令行query：

{
      "query": {
        "has_child": {
          "type": "instance",
          "query": {
            "has_child": {
              "type": "instance_permission",
              "query": {
                "terms": {
                  "uuid": {
                    "index": "user",
                    "type": "user",
                    "id": "5",
                    "path": "uuids"
                  }
                }
              }
            }
          }
        }
      }
    }

java api：

TermsLookupQueryBuilder terms = QueryBuilders
                    .termsLookupQuery("uuid")
                    .lookupIndex("user")
                    .lookupType("user")
                    .lookupId("5")
                    .lookupPath("uuids");

HasChildQueryBuilder   hQuery = QueryBuilders
                       .hasChildQuery("instance", QueryBuilders
                       .hasChildQuery("instance_permission", terms));

System.out.println("Exectuing Query 1");
System.out.println(hQuery.toString());
SearchResponse searchResponse1 = client
              .prepareSearch("foo_oa_hr_askforleave")
                .setQuery(hQuery).execute().actionGet();

System.out.println("There were " + searchResponse1.getHits().getTotalHits()
                         + " results found for Query 1.");
System.out.println(searchResponse1.toString());
System.out.println();