How to setHighlighterNoMatchSize for a specific field?

andrewwwooster · November 10, 2015, 2:14am

Using JSON I can specify no_match_size for a highlight field.

  "highlight": {
    "fields" : {
      "f1" : {"no_match_size": 100},
      "f2" : {"no_match_size": 200}
    }
  }

However, using the Java API it looks like setHighlighterNoMatchSize() applies to all highlighted fields in the search request. Is there a way to using Java to specify different highlight no_match_sizes for different fields?

nik9000 · November 11, 2015, 1:21pm

Have a look at how the tests do it:

github.com

elastic/elasticsearch/blob/93b57089d0c02b4ab5a589bc481ab5ccf3eb8c2b/core/src/test/java/org/elasticsearch/search/highlight/HighlighterSearchIT.java#L1772




field.highlighterType("fvh");
response = client().prepareSearch("test").highlighter(new HighlightBuilder().field(field)).get();
assertNotHighlighted(response, 0, "text");


field.highlighterType("postings");
response = client().prepareSearch("test").highlighter(new HighlightBuilder().field(field)).get();
assertNotHighlighted(response, 0, "text");


// When noMatchSize is set to 0 you also shouldn't get any
field.highlighterType("plain").noMatchSize(0);
response = client().prepareSearch("test").highlighter(new HighlightBuilder().field(field)).get();
assertNotHighlighted(response, 0, "text");


field.highlighterType("fvh");
response = client().prepareSearch("test").highlighter(new HighlightBuilder().field(field)).get();
assertNotHighlighted(response, 0, "text");


field.highlighterType("postings");
response = client().prepareSearch("test").highlighter(new HighlightBuilder().field(field)).get();
assertNotHighlighted(response, 0, "text");

It looks like there is a noMatchSize method on HighlightBuilder.Field.

andrewwwooster · November 11, 2015, 3:36pm

Thanks for the insight. My solution now looks like this:

SearchResponse response = client.prepareSearch("my_index")
        .addHighlightedField( 
                new HighlightBuilder.Field("preferredSnippet")
                        .fragmentSize(10000)
                        .noMatchSize(10000) )