Tablestore:Resumo e destaque

Usando resumo e destaque de consulta para campos não aninhados

O exemplo a seguir usa uma match query para recuperar linhas nas quais o campo description contém o termo tablestore. O exemplo envolve os termos correspondentes nos fragmentos retornados com <b> e </b>. O campo description é um campo Text para o qual o resumo e o destaque estão ativados.

String tableName = "example_table";
String indexName = "example_index";

MatchQuery matchQuery = new MatchQuery();
matchQuery.setFieldName("description");
matchQuery.setText("tablestore");

HighlightParameter highlightParameter = new HighlightParameter();
highlightParameter.setPreTag("<b>");
highlightParameter.setPostTag("</b>");

Highlight highlight = new Highlight();
highlight.addFieldHighlightParam("description", highlightParameter);

SearchQuery searchQuery = new SearchQuery();
searchQuery.setQuery(matchQuery);
searchQuery.setHighlight(highlight);
searchQuery.setLimit(10);

SearchRequest request = new SearchRequest(tableName, indexName, searchQuery);
SearchResponse response = client.search(request);
for (SearchHit hit : response.getSearchHits()) {
    HighlightResultItem resultItem = hit.getHighlightResultItem();
    if (resultItem == null) {
        continue;
    }
    HighlightField field = resultItem.getHighlightFieldByName("description");
    if (field != null) {
        System.out.println(field.getFragments());
    }
}

Usando destaque ao consultar campos aninhados

O exemplo a seguir mostra como usar NestedQuery para consultar dados em que o valor do subcampo Level1_Col1_Nested no campo aninhado Col_Nested corresponde a `hangzhou shanghai`. A consulta de pesquisa é destacada nos resultados retornados.

MatchQuery matchQuery = new MatchQuery();
matchQuery.setFieldName("items.description");
matchQuery.setText("hangzhou");

HighlightParameter parameter = new HighlightParameter();
parameter.setPreTag("<em>");
parameter.setPostTag("</em>");
Highlight highlight = new Highlight();
highlight.addFieldHighlightParam("items.description", parameter);

InnerHits innerHits = new InnerHits();
innerHits.setLimit(3);
innerHits.setSort(new Sort(Arrays.asList(
        new ScoreSort(), new DocSort(SortOrder.ASC))));
innerHits.setHighlight(highlight);

NestedQuery nestedQuery = new NestedQuery();
nestedQuery.setPath("items");
nestedQuery.setQuery(matchQuery);
nestedQuery.setScoreMode(ScoreMode.None);
nestedQuery.setInnerHits(innerHits);

SearchQuery searchQuery = new SearchQuery();
searchQuery.setQuery(nestedQuery);

Suponha que o campo aninhado de múltiplos níveis Col_Nested inclua dois subcampos: Level1_Col1_Text (Text) e Level1_Col2_Nested (Nested). O campo aninhado Level1_Col2_Nested inclui o subcampo Level2_Col1_Text.

O exemplo a seguir mostra como adicionar uma BoolQuery a uma NestedQuery para usar os recursos de resumo e destaque tanto no subcampo Level1_Col1_Text do campo Col_Nested quanto no subcampo Level2_Col1_Text sob Level1_Col2_Nested.

public static void nestedQueryWithHighlighting(SyncClient client) { SearchRequest searchRequest = SearchRequest.newBuilder() .tableName("<TABLE_NAME>") .indexName("<SEARCH_INDEX_NAME>") .returnAllColumnsFromIndex(true) .searchQuery(SearchQuery.newBuilder() .limit(5) .query(QueryBuilders.nested() .path("Col_Nested") .scoreMode(ScoreMode.Min) .query(QueryBuilders.bool() .should(QueryBuilders.match("Col_Nested.Level1_Col1_Text", "hangzhou shanghai")) .should(QueryBuilders.nested() .path("Col_Nested.Level1_Col2_Nested") .scoreMode(ScoreMode.Min) .query(QueryBuilders.match("Col_Nested.Level1_Col2_Nested.Level2_Col1_Text", "hangzhou shanghai")) .innerHits(InnerHits.newBuilder() .highlight(Highlight.newBuilder() .addFieldHighlightParam("Col_Nested.Level1_Col2_Nested.Level2_Col1_Text", HighlightParameter.newBuilder().build()) .build()) .build()))) .innerHits(InnerHits.newBuilder() .sort(new Sort(Arrays.asList( new ScoreSort(), new DocSort() ))) .highlight(Highlight.newBuilder() .addFieldHighlightParam("Col_Nested.Level1_Col1_Text", HighlightParameter.newBuilder().build()) .build()) .build())) .build()) .build(); SearchResponse resp = client.search(searchRequest); // Print the highlighted results. printSearchHit(resp.getSearchHits(), ""); } /** Print the content of searchHit. @param searchHits The search hits. @param prefix The prefix to add when printing nested structures to show hierarchical information. / private static void printSearchHit(List<SearchHit> searchHits, String prefix) { for (SearchHit searchHit : searchHits) { if (searchHit.getScore() != null) { System.out.printf("%s Score: %s ", prefix, searchHit.getScore()); } if (searchHit.getOffset() != null) { System.out.printf("%s Offset: %s ", prefix, searchHit.getOffset()); } if (searchHit.getRow() != null) { System.out.printf("%s Row: %s ", prefix, searchHit.getRow().toString()); } // Print the highlighted fragments for each field. if (searchHit.getHighlightResultItem() != null) { System.out.printf("%s Highlight: ", prefix); StringBuilder strBuilder = new StringBuilder(); for (Map.Entry<String, HighlightField> entry : searchHit.getHighlightResultItem().getHighlightFields().entrySet()) { strBuilder.append(entry.getKey()).append(":").append("["); strBuilder.append(StringUtils.join(",", entry.getValue().getFragments())).append("] "); } System.out.printf("%s %s", prefix, strBuilder); } // Highlighted results for the nested type. for (SearchInnerHit searchInnerHit : searchHit.getSearchInnerHits().values()) { System.out.printf("%s Path: %s ", prefix, searchInnerHit.getPath()); System.out.printf("%s InnerHit: ", prefix); printSearchHit(searchInnerHit.getSubSearchHits(), prefix + " "); } System.out.println(); } }