import org.codelibs.fess.suggest.index.contents.document.DocumentReader;
import org.codelibs.fess.suggest.index.contents.document.ESSourceReader;
import org.codelibs.fess.suggest.request.suggest.SuggestResponse;

public class SuggestIndex {
    public SuggestResponse suggest(String query) {
        return ComponentsUtil.suggester.suggest()
            .setQuery(query)
            .execute().getResponse();
    }

    public void index() {

        String[] callback = params.get("callback");
        String[] query = params.get("query");
        try {
            SuggestIndex suggestIndex = new SuggestIndex();
            SuggestResponse response = suggestIndex.suggest(query[0]);

            XContentBuilder builder  = JsonXContent.contentBuilder()
                .startObject()
                .startObject("response")