import org.elasticsearch.index.query.PrefixQueryBuilder; //导入依赖的package包/类
@Override
public Observable<PersistentObject> call(String prefix) {

    final Elasticsearch elasticSearch = vertxContext.verticle().elasticsearch();

    PrefixQueryBuilder query = prefixQuery("_id", prefix);

    String objectIndex = elasticSearch.objectIndex(persistentContainer.getName());


    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug(format("Search Request {%s,%s} = %s", elasticSearch.defaultType(), objectIndex, Jsonify.toString(query)));
    }

    final int MAX_RESULTS = 100;

    SearchRequestBuilder request =
            elasticSearch.get()
                    .prepareSearch(objectIndex)
                    .setTypes(elasticSearch.defaultType())
                    .setSize(MAX_RESULTS + 1)
                    .setQuery(query)
                    .setTimeout(timeValueMillis(elasticSearch.getDefaultSearchTimeout() - 10));

    return elasticSearch.execute(vertxContext, request, elasticSearch.getDefaultSearchTimeout())
            .flatMap(new Func1<Optional<SearchResponse>, Observable<PersistentObject>>() {
                @Override
                public Observable<PersistentObject> call(Optional<SearchResponse> oSearchResponse) {
                    SearchResponse searchResponse = oSearchResponse.get();
                    if (LOGGER.isDebugEnabled()) {
                        LOGGER.debug(format("Search Response {%s,%s} = %s", elasticSearch.defaultType(), objectIndex, Jsonify.toString(searchResponse)));
                    }
                    checkState(searchResponse.getHits().totalHits() <= MAX_RESULTS, "Max search results is %s", MAX_RESULTS);
                    return from(searchResponse.getHits())
                            .map(searchHit -> searchHit)
                            .map(searchHit -> fromSearchHit(persistentContainer, searchHit));

                }
            });
}
 

import org.elasticsearch.index.query.PrefixQueryBuilder; //导入依赖的package包/类
@Test
public void shouldCreatePrefixFilter() throws Exception {
  //given
  BoundedFilterFactory factory = new BoundedFilterFactory();
  PrefixSegment anyPrefixSegment = new PrefixSegment("prefix");
  //when
  QueryBuilder filter = factory.createBoundedFilter("fieldName", anyPrefixSegment);
  //then
  assertThat(filter).isInstanceOf(PrefixQueryBuilder.class);
}
 

import org.elasticsearch.index.query.PrefixQueryBuilder; //导入依赖的package包/类
private void registerQueryParsers(List<SearchPlugin> plugins) {
    registerQuery(new QuerySpec<>(MatchQueryBuilder.NAME, MatchQueryBuilder::new, MatchQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(MatchPhraseQueryBuilder.NAME, MatchPhraseQueryBuilder::new, MatchPhraseQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(MatchPhrasePrefixQueryBuilder.NAME, MatchPhrasePrefixQueryBuilder::new,
            MatchPhrasePrefixQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(MultiMatchQueryBuilder.NAME, MultiMatchQueryBuilder::new, MultiMatchQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(NestedQueryBuilder.NAME, NestedQueryBuilder::new, NestedQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(HasChildQueryBuilder.NAME, HasChildQueryBuilder::new, HasChildQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(HasParentQueryBuilder.NAME, HasParentQueryBuilder::new, HasParentQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(DisMaxQueryBuilder.NAME, DisMaxQueryBuilder::new, DisMaxQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(IdsQueryBuilder.NAME, IdsQueryBuilder::new, IdsQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(MatchAllQueryBuilder.NAME, MatchAllQueryBuilder::new, MatchAllQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(QueryStringQueryBuilder.NAME, QueryStringQueryBuilder::new, QueryStringQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(BoostingQueryBuilder.NAME, BoostingQueryBuilder::new, BoostingQueryBuilder::fromXContent));
    BooleanQuery.setMaxClauseCount(INDICES_MAX_CLAUSE_COUNT_SETTING.get(settings));
    registerQuery(new QuerySpec<>(BoolQueryBuilder.NAME, BoolQueryBuilder::new, BoolQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(TermQueryBuilder.NAME, TermQueryBuilder::new, TermQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(TermsQueryBuilder.NAME, TermsQueryBuilder::new, TermsQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(FuzzyQueryBuilder.NAME, FuzzyQueryBuilder::new, FuzzyQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(RegexpQueryBuilder.NAME, RegexpQueryBuilder::new, RegexpQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(RangeQueryBuilder.NAME, RangeQueryBuilder::new, RangeQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(PrefixQueryBuilder.NAME, PrefixQueryBuilder::new, PrefixQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(WildcardQueryBuilder.NAME, WildcardQueryBuilder::new, WildcardQueryBuilder::fromXContent));
    registerQuery(
            new QuerySpec<>(ConstantScoreQueryBuilder.NAME, ConstantScoreQueryBuilder::new, ConstantScoreQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(SpanTermQueryBuilder.NAME, SpanTermQueryBuilder::new, SpanTermQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(SpanNotQueryBuilder.NAME, SpanNotQueryBuilder::new, SpanNotQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(SpanWithinQueryBuilder.NAME, SpanWithinQueryBuilder::new, SpanWithinQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(SpanContainingQueryBuilder.NAME, SpanContainingQueryBuilder::new,
            SpanContainingQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(FieldMaskingSpanQueryBuilder.NAME, FieldMaskingSpanQueryBuilder::new,
            FieldMaskingSpanQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(SpanFirstQueryBuilder.NAME, SpanFirstQueryBuilder::new, SpanFirstQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(SpanNearQueryBuilder.NAME, SpanNearQueryBuilder::new, SpanNearQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(SpanOrQueryBuilder.NAME, SpanOrQueryBuilder::new, SpanOrQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(MoreLikeThisQueryBuilder.NAME, MoreLikeThisQueryBuilder::new,
            MoreLikeThisQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(WrapperQueryBuilder.NAME, WrapperQueryBuilder::new, WrapperQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(CommonTermsQueryBuilder.NAME, CommonTermsQueryBuilder::new, CommonTermsQueryBuilder::fromXContent));
    registerQuery(
            new QuerySpec<>(SpanMultiTermQueryBuilder.NAME, SpanMultiTermQueryBuilder::new, SpanMultiTermQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(FunctionScoreQueryBuilder.NAME, FunctionScoreQueryBuilder::new,
            FunctionScoreQueryBuilder::fromXContent));
    registerQuery(
            new QuerySpec<>(SimpleQueryStringBuilder.NAME, SimpleQueryStringBuilder::new, SimpleQueryStringBuilder::fromXContent));
    registerQuery(new QuerySpec<>(TypeQueryBuilder.NAME, TypeQueryBuilder::new, TypeQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(ScriptQueryBuilder.NAME, ScriptQueryBuilder::new, ScriptQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(GeoDistanceQueryBuilder.NAME, GeoDistanceQueryBuilder::new, GeoDistanceQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(GeoBoundingBoxQueryBuilder.NAME, GeoBoundingBoxQueryBuilder::new,
            GeoBoundingBoxQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(GeoPolygonQueryBuilder.NAME, GeoPolygonQueryBuilder::new, GeoPolygonQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(ExistsQueryBuilder.NAME, ExistsQueryBuilder::new, ExistsQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(MatchNoneQueryBuilder.NAME, MatchNoneQueryBuilder::new, MatchNoneQueryBuilder::fromXContent));
    registerQuery(new QuerySpec<>(ParentIdQueryBuilder.NAME, ParentIdQueryBuilder::new, ParentIdQueryBuilder::fromXContent));

    if (ShapesAvailability.JTS_AVAILABLE && ShapesAvailability.SPATIAL4J_AVAILABLE) {
        registerQuery(new QuerySpec<>(GeoShapeQueryBuilder.NAME, GeoShapeQueryBuilder::new, GeoShapeQueryBuilder::fromXContent));
    }

    registerFromPlugin(plugins, SearchPlugin::getQueries, this::registerQuery);
}
 

import org.elasticsearch.index.query.PrefixQueryBuilder; //导入依赖的package包/类
@Override
public QueryBuilder create(String fieldName, PrefixSegment resolvedBound) {
  return new PrefixQueryBuilder(fieldName, resolvedBound.getPrefix());
}
 

import org.elasticsearch.index.query.PrefixQueryBuilder; //导入依赖的package包/类
private static QueryBuilder prefixQuery(String prefix) {
    return new PrefixQueryBuilder(EsContent.PARENT_FLATTENED_TITLE, prefix);
}