D-Net

        queryOpts.add("start", from*to + "");

        queryOpts.add("rows", to +"");

        long startTime = System.nanoTime();

        return null;

    }

        queryOpts.add("start", "0");

        queryOpts.add("rows", "0");

        queryOpts.remove("rows");

        queryOpts.add("fl", "__result");

        queryOpts.add("shards.tolerant","true");

        queryOpts.add("cursorMark", "*");

        String cursorMark = "*";

        String nextCursorMark = "";

        try {

            QueryResponse resp = solrClient.query(SolrParams.toSolrParams(queryOpts));

                resp = solrClient.query(SolrParams.toSolrParams(queryOpts));

                cursorMark = nextCursorMark;

                nextCursorMark = resp.getNextCursorMark();

                    if (transformer != null) {

                        String result = null;

                        try {

                            result = transformer.transform((String) resp.getResults().get(i).get("__result"));

                            logger.debug("RESULT " + result);

                queryOpts.remove("cursorMark");

                queryOpts.add("cursorMark", nextCursorMark);

            }

        } catch (IOException ioe) {

            logger.error("Error executing solr query. ", ioe);

        }

    }

            rs = rsFactory.createResultSet(epr);

        } catch (IndexServiceException ise) {

            logger.error("Error getting cursor results.", ise);

        try {

            SearchResult sr = ((SearchServiceImpl)searchService).newSearch(fullQuery, Locale.getDefault().toString(), fields, fieldQueries,0, 0, format, transformer,null,false);

            logger.debug("Total number of results " + sr.getTotal());

        } catch (SearchServiceException sse) {

            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(APIResponseFormatter.

                    compose500Message(MediaType.APPLICATION_JSON, "Fail to fetch report.", sse.getMessage())).build();

        enhanceQueryWithEntityId(queryBuilder, entity, cleanId(entityId));

    }

    private void resultPidQuery(StringBuilder queryBuilder, RequestResponseHandler.Entity entity, String resultPid, List<String> fieldQueries){

        builtDeletedByInferenceQuery(queryBuilder);

            throw new IllegalArgumentException("Entity " + entity.toString() + " is not supported.");

        }

        enhanceQueryWithPid(queryBuilder, entity, cleanId(resultPid));

import eu.dnetlib.data.search.utils.cql.ParameterQueryEnhancer;

import eu.dnetlib.data.search.utils.vocabulary.VocabularyManager;

import eu.dnetlib.domain.data.FormattedSearchResult;

import io.micrometer.core.annotation.Timed;

import io.micrometer.prometheus.PrometheusMeterRegistry;

import org.apache.commons.collections.ListUtils;

import org.apache.commons.lang.IncompleteArgumentException;

import org.apache.commons.lang.StringEscapeUtils;

import org.apache.log4j.Logger;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.EnableAspectJAutoProxy;

import org.springframework.http.HttpStatus;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

import javax.annotation.Resource;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.PrintWriter;

import java.text.SimpleDateFormat;

import java.util.*;

        return request.getParameter("format");

    } */

        long time = System.currentTimeMillis();

        solrClient.setDefaultCollection("DMF-index-openaire");

        NamedList<String> queryOpts = new NamedList<String>();

            for (int i = 0; i < resp.getResults().size(); i++) {

                String result = ((ArrayList<String>) resp.getResults().get(i).get("__result")).get(0);

            }

            System.out.println("END");

        }

        time = System.currentTimeMillis() - time;

        System.out.println("Answer time " + time);