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package eu.dnetlib.data.search.web.api;
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import com.google.common.collect.Iterables;
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import eu.dnetlib.api.data.SearchService;
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import eu.dnetlib.api.data.SearchServiceException;
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import eu.dnetlib.data.search.utils.cql.ParameterQueryEnhancer;
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import eu.dnetlib.data.search.utils.vocabulary.VocabularyManager;
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import eu.dnetlib.domain.data.FormattedSearchResult;
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import eu.dnetlib.functionality.cql.CqlTranslatorImpl;
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import io.micrometer.core.annotation.Timed;
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import io.micrometer.prometheus.PrometheusMeterRegistry;
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import org.apache.commons.collections.ListUtils;
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import org.apache.commons.lang.IncompleteArgumentException;
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import org.apache.commons.lang.StringEscapeUtils;
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import org.apache.log4j.Logger;
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import org.apache.solr.client.solrj.SolrServerException;
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import org.apache.solr.client.solrj.impl.CloudSolrClient;
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import org.apache.solr.client.solrj.response.QueryResponse;
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import org.apache.solr.common.params.SolrParams;
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import org.apache.solr.common.util.NamedList;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.context.annotation.EnableAspectJAutoProxy;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.MediaType;
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import org.springframework.http.ResponseEntity;
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import org.springframework.stereotype.Controller;
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import org.springframework.ui.ModelMap;
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import org.springframework.web.bind.annotation.ExceptionHandler;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.bind.annotation.ResponseBody;
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import org.z3950.zing.cql.CQLParseException;
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import javax.annotation.Resource;
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import javax.servlet.ServletOutputStream;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.text.SimpleDateFormat;
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import java.util.*;
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@Controller
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@EnableAspectJAutoProxy
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@Timed
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public class SearchRequestController {
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    @Autowired
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    private SearchService searchService = null;
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    @Autowired
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    private VocabularyManager vocabularyManager = null;
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    @Resource
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    private String maxResults = null;
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    @Resource
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    private String maxSize = null;
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    @Autowired
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    private PrometheusMeterRegistry registry;
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    private static Logger logger = Logger.getLogger(SearchRequestController.class);
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    private static final String XML_CONTENT_TYPE = "application/xml;charset=UTF-8";
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    private static final String JSON_CONTENT_TYPE = "application/json;charset=UTF-8;";
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    private static final String CSV_CONTENT_TYPE = "text/csv;charset=UTF-8;";
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    private static final String TSV_CONTENT_TYPE = "text/tab-separated-values;charset=UTF-8;";
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    private static final String HTML_CONTENT_TYPE = "text/html;charset=UTF-8;";
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    private static final String PUBLICATION_BASIC_QUERY = "(oaftype exact result) and (resulttypeid exact publication)";
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    private static final String DATASET_BASIC_QUERY = "(oaftype exact result) and (resulttypeid exact dataset)";
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    private static final String SOFTWARE_BASIC_QUERY = "(oaftype exact result) and (resulttypeid exact software)";
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    private static final String OTHER_BASIC_QUERY = "(oaftype exact result) and (resulttypeid exact other)";
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    private static final String PROJECT_BASIC_QUERY = "(oaftype exact project)";
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    private static final List<String> GLOBAL_PARAMETERS = Arrays.asList("page", "size", "format", "sortBy");
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    private static final List<String> PUB_N_DATA_COMMON_PARAMETERS = Arrays.asList("author", "doi", "community", "FP7ProjectID", "FP7scientificArea",
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            "fromDateAccepted", "funder", "fundingStream", "hasECFunding", "hasProject", "hasWTFunding", "keywords",
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            "model", "OA", "openaireProjectID", "openaireProviderID", "projectID", "title", "toDateAccepted", "country");
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    private static final List<String> PUB_PARAMETERS = Arrays.asList("openairePublicationID");
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    private static final List<String> DATA_PARAMETERS = Arrays.asList("openaireDatasetID");
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    private static final List<String> SOFTWARE_PARAMETERS = Arrays.asList("openaireSoftwareID");
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    private static final List<String> OTHER_PARAMETERS = Arrays.asList("openaireOtherID");
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    private static final List<String> PUB_N_DATASET_MODELS = Arrays.asList("dc", "openaire", "sygma");
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    private static final List<String> PUB_N_DATASET_FORMATS = Arrays.asList("json", "rss", "xml", "csv", "tsv", "html");
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    private static final List<String> PROJECT_PARAMETERS = Arrays.asList("acronym", "callID", "endYear", "FP7scientificArea",
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            "funder", "fundingStream", "grantID", "hasECFunding", "hasWTFunding", "keywords", "name",
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            "participantAcronyms", "participantCountries", "startYear", "sc39", "openaireParticipantID", "openaireProjectID");
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    private static final List<String> PROJECT_FORMATS = Arrays.asList("xml", "json", "csv", "tsv", "html");
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    //TODO this is for joomla - to be removed soon
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    @RequestMapping(value = "/search", method = RequestMethod.GET)
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    @Timed(value = "search.joomla.requests", longTask = false)
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    public void search(HttpServletRequest request, HttpServletResponse response) {
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        PrintWriter writer = null;
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        FormattedSearchResult formattedSearchResult = null;
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        String action = readActionParameter(request);
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        String query = readQueryParameter(request);
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        String format = (request.getParameter("format") != null) ? request.getParameter("format") : "xml";
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        createResponseMeta(response, format);
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        String locale = request.getParameter("locale");
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        int page = 0;
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        int size = 0;
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        //TODO check paging
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        if (!action.equals("refine")) {
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            page = readParameter(request, "page", 1);
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            size = readParameter(request, "size", 10);
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        }
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        if (size > Integer.parseInt(maxSize)) {
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            throw new IllegalArgumentException("Size argument have exceeded the maximum allowed number.");
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        }
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        String sTransformer = request.getParameter("sTransformer");
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        String rTransformer = request.getParameter("rTransformer");
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        Collection<String> fields = readParameter(request, "fields");
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        checkTransformerParameters(action, sTransformer, rTransformer, fields);
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        try {
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            createResponseMeta(response, format);
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            writer = response.getWriter();
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            formattedSearchResult = searchService.searchNrefine(query,
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                    sTransformer, rTransformer, format, locale, page, size,
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                    fields);
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            writer.append(formattedSearchResult.getFormattedResult());
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        } catch (Exception e) {
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            logger.error("Fail to execute search.", e);
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            createXmlErrorPage(writer, e);
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        } finally {
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            if (writer != null) {
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                writer.close();
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            }
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        }
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    }
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    private void checkTransformerParameters(String action, String sTransformer, String rTransformer, Collection<String> fields) {
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        if (action.equals("search")) {
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            if (sTransformer == null) {
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                throw new IncompleteArgumentException("Undefined search transformer. Search request");
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            }
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        } else if (action.equals("refine")) {
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            if (rTransformer == null) {
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                throw new IncompleteArgumentException(
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                        "Undefined refine transformer. Refine request");
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            }
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            if (fields == null) {
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                throw new IncompleteArgumentException(
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                        "Undefined refine fields. Refine request");
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            }
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        } else if (action.equals("searchNrefine")) {
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            if (sTransformer == null) {
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                throw new IncompleteArgumentException(
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                        "Undefined search transformer. Search and Refine request");
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            }
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            if (rTransformer == null) {
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                throw new IncompleteArgumentException(
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                        "Undefined refine transformer. Search and Refine request");
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            }
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            if (fields == null) {
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                throw new IncompleteArgumentException(
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                        "Undefined refine fields. Search and Refine request");
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            }
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        } else {
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            throw new UnsupportedOperationException("The action " + action
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                    + " is not supported. Please try one of {search, refine, searchNrefine}.");
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        }
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    }
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    private String readQueryParameter(HttpServletRequest request) {
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        String query = request.getParameter("query");
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        if (query == null) {
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            throw new IncompleteArgumentException("Undefined query. Search request");
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        }
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        return query;
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    }
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    private String readActionParameter(HttpServletRequest request) {
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        String action = request.getParameter("action");
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        if (action == null) {
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            throw new UnsupportedOperationException("Undefined action.");
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        }
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        return action;
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    }
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    @RequestMapping(value="/search/openSearchDescriptor", method = RequestMethod.GET)
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    public String printOpenSearchDescriptor(ModelMap model) {
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        return "openSearchDescriptor";
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    }
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    @RequestMapping(value = "/api/publications", method = RequestMethod.GET, produces = {MediaType.APPLICATION_XML_VALUE,MediaType.APPLICATION_JSON_VALUE})
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    @Timed(value = "http.server.request.duration", extraTags = {"referer", "api", "uri", "/api/publications"}, longTask = false)
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    public void searchPublications(HttpServletRequest request, HttpServletResponse response) throws Exception {
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        long time = System.currentTimeMillis();
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        checkParameters(ListUtils.union(PUB_N_DATA_COMMON_PARAMETERS, PUB_PARAMETERS),request.getParameterMap());
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        int page = readParameter(request, "page", 1);
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        int size = readParameter(request, "size", 10);
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        checkRequestSize(page, size);
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        String format = (request.getParameter("format") != null) ? request.getParameter("format") : "xml";
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        checkFormatParameter(PUB_N_DATASET_FORMATS, format);
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        createResponseMeta(response, format);
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        String locale = request.getParameter("locale");
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        String model = request.getParameter("model");
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        checkModelParameter(PUB_N_DATASET_MODELS, model);
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        String sTransformer = defineTransformer(model,format);
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        Collection<String> referrers = readParameter(request,"referrer");
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        String newFormat = defineFormatter(model, format, true, referrers);
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        StringBuilder queryBuilder = new StringBuilder();
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        queryBuilder.append(PUBLICATION_BASIC_QUERY);
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        ParameterQueryEnhancer.enhanceQueryWithFundingLevelParams(queryBuilder, request, vocabularyManager, isModelSygma(model));
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        ParameterQueryEnhancer.enhanceQueryWithOpenAIREIds(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithMetadataKeywords(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithFundingParams(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithCommunityParams(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithRelProjectParams(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithAccessRights(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithDate(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithDoi(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithResultsSortParameters(queryBuilder, request);
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        FormattedSearchResult formattedSearchResult = null;
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        try {
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            formattedSearchResult = searchService.search(queryBuilder.toString(),sTransformer, (newFormat!=null)?newFormat:format, locale, page, size);
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        } catch (Exception e) {
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            logger.error("Fail to execute search.", e);
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            throw new Exception("Fail to execute search", e);
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        }
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        PrintWriter writer = response.getWriter();
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        writer.append(formattedSearchResult.getFormattedResult());
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        writer.close();
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        time = System.currentTimeMillis() - time;
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        logger.debug("Answer old time " + time);
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    }
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    @RequestMapping(value = "/api/datasets", method = RequestMethod.GET, produces = {MediaType.APPLICATION_XML_VALUE,MediaType.APPLICATION_JSON_VALUE})
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    @Timed(value = "http.server.request.duration", extraTags = {"referer", "api", "uri", "/api/datasets"}, longTask = false)
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    public void searchData(HttpServletRequest request, HttpServletResponse response) throws Exception {
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        checkParameters(ListUtils.union(PUB_N_DATA_COMMON_PARAMETERS, DATA_PARAMETERS),request.getParameterMap());
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        int page = readParameter(request, "page", 1);
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        int size = readParameter(request, "size", 10);
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        checkRequestSize(page, size);
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        String format = (request.getParameter("format") != null) ? request.getParameter("format") : "xml";
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        createResponseMeta(response, format);
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        checkFormatParameter(PUB_N_DATASET_FORMATS, format);
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        String model = request.getParameter("model");
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        checkModelParameter(PUB_N_DATASET_MODELS, model);
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        String sTransformer = defineTransformer(model,format);
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        Collection<String> referrers = readParameter(request,"referrer");
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        String newFormat = defineFormatter(model, format, false, referrers);
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        String locale = request.getParameter("locale");
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        StringBuilder queryBuilder = new StringBuilder();
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        queryBuilder.append(DATASET_BASIC_QUERY);
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        ParameterQueryEnhancer.enhanceQueryWithFundingLevelParams(queryBuilder, request, vocabularyManager, isModelSygma(model));
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        ParameterQueryEnhancer.enhanceQueryWithOpenAIREIds(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithMetadataKeywords(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithFundingParams(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithRelProjectParams(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithAccessRights(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithDate(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithDoi(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithResultsSortParameters(queryBuilder, request);
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        FormattedSearchResult formattedSearchResult =  null;
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        try {
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            formattedSearchResult = searchService.search(queryBuilder.toString(),sTransformer, (newFormat!=null)?newFormat:format, locale, page, size);
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        } catch (Exception e) {
312
            logger.error("Fail to execute search.", e);
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            throw new Exception("Fail to execute search.", e);
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        }
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        if (formattedSearchResult == null) {
317
            throw new Exception("Fail to execute search.");
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        }
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        PrintWriter writer = response.getWriter();
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        writer.append(formattedSearchResult.getFormattedResult());
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        writer.close();
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    }
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    @RequestMapping(value = "/api/software", method = RequestMethod.GET, produces = {MediaType.APPLICATION_XML_VALUE,MediaType.APPLICATION_JSON_VALUE})
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    @Timed(value = "http.server.request.duration", extraTags = {"referer", "api", "uri", "/api/software"}, longTask = false)
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    public void searchSoftware(HttpServletRequest request, HttpServletResponse response) throws Exception {
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        checkParameters(ListUtils.union(PUB_N_DATA_COMMON_PARAMETERS, SOFTWARE_PARAMETERS),request.getParameterMap());
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        int page = readParameter(request, "page", 1);
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        int size = readParameter(request, "size", 10);
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        checkRequestSize(page, size);
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        String format = (request.getParameter("format") != null) ? request.getParameter("format") : "xml";
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        createResponseMeta(response, format);
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        checkFormatParameter(PUB_N_DATASET_FORMATS, format);
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        String model = request.getParameter("model");
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        checkModelParameter(PUB_N_DATASET_MODELS, model);
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        String sTransformer = defineTransformer(model,format);
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        Collection<String> referrers = readParameter(request,"referrer");
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        String newFormat = defineFormatter(model, format, false, referrers);
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        String locale = request.getParameter("locale");
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        StringBuilder queryBuilder = new StringBuilder();
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        queryBuilder.append(SOFTWARE_BASIC_QUERY);
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        ParameterQueryEnhancer.enhanceQueryWithFundingLevelParams(queryBuilder, request, vocabularyManager, isModelSygma(model));
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        ParameterQueryEnhancer.enhanceQueryWithOpenAIREIds(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithMetadataKeywords(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithFundingParams(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithCommunityParams(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithRelProjectParams(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithAccessRights(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithDate(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithDoi(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithResultsSortParameters(queryBuilder, request);
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        FormattedSearchResult formattedSearchResult = null;
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        try {
368
            formattedSearchResult =  searchService.search(queryBuilder.toString(),sTransformer, (newFormat!=null)?newFormat:format, locale, page, size);
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        } catch (Exception e) {
371
            logger.error("Fail to execute search.", e);
372
            throw new Exception("Fail to execute search", e);
373
        }
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        PrintWriter writer = response.getWriter();
376
        writer.append(formattedSearchResult.getFormattedResult());
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    }
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    @RequestMapping(value = "/api/other", method = RequestMethod.GET, produces = {MediaType.APPLICATION_XML_VALUE,MediaType.APPLICATION_JSON_VALUE})
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    @Timed(value = "http.server.request.duration", extraTags = {"referer", "api", "uri", "/api/other"}, longTask = false)
382
    public void searchOther(HttpServletRequest request, HttpServletResponse response) throws Exception {
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        checkParameters(ListUtils.union(PUB_N_DATA_COMMON_PARAMETERS, OTHER_PARAMETERS),request.getParameterMap());
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        int page = readParameter(request, "page", 1);
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        int size = readParameter(request, "size", 10);
388
        checkRequestSize(page, size);
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        String format = (request.getParameter("format") != null) ? request.getParameter("format") : "xml";
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        createResponseMeta(response, format);
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        checkFormatParameter(PUB_N_DATASET_FORMATS, format);
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        String model = request.getParameter("model");
396
        checkModelParameter(PUB_N_DATASET_MODELS, model);
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        String sTransformer = defineTransformer(model,format);
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        Collection<String> referrers = readParameter(request,"referrer");
400
        String newFormat = defineFormatter(model, format, false, referrers);
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        String locale = request.getParameter("locale");
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404
        StringBuilder queryBuilder = new StringBuilder();
405
        queryBuilder.append(OTHER_BASIC_QUERY);
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407
        ParameterQueryEnhancer.enhanceQueryWithFundingLevelParams(queryBuilder, request, vocabularyManager, isModelSygma(model));
408
        ParameterQueryEnhancer.enhanceQueryWithOpenAIREIds(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithMetadataKeywords(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithFundingParams(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithCommunityParams(queryBuilder, request);
412
        ParameterQueryEnhancer.enhanceQueryWithRelProjectParams(queryBuilder, request);
413
        ParameterQueryEnhancer.enhanceQueryWithAccessRights(queryBuilder, request);
414
        ParameterQueryEnhancer.enhanceQueryWithDate(queryBuilder, request);
415
        ParameterQueryEnhancer.enhanceQueryWithDoi(queryBuilder, request);
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417
        ParameterQueryEnhancer.enhanceQueryWithResultsSortParameters(queryBuilder, request);
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419
        FormattedSearchResult formattedSearchResult = null;
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421
        //long start = System.currentTimeMillis();
422
        try {
423
            //Timer.Sample sample = Timer.start(metrics.getRegistry());
424
            formattedSearchResult =  searchService.search(queryBuilder.toString(),sTransformer, (newFormat!=null)?newFormat:format, locale, page, size);
425

    
426
        } catch (Exception e) {
427
            logger.error("Fail to execute search.", e);
428
            throw new Exception("Fail to execute search", e);
429
        }
430

    
431
        PrintWriter writer = response.getWriter();
432
        writer.append(formattedSearchResult.getFormattedResult());
433
    }
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    @RequestMapping(value = "/api/projects", method = RequestMethod.GET, produces = {MediaType.APPLICATION_XML_VALUE,MediaType.APPLICATION_JSON_VALUE})
436
    @Timed(value = "http.server.request.duration", extraTags = {"referer", "api", "uri", "/api/projects"}, longTask = false)
437
    public void searchProjects(HttpServletRequest request, HttpServletResponse response) throws Exception {
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439
        checkParameters(PROJECT_PARAMETERS, request.getParameterMap());
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441
        int page = readParameter(request, "page", 1);
442
        int size = readParameter(request, "size", 10);
443
        checkRequestSize(page, size);
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445
        StringBuilder queryBuilder = new StringBuilder();
446
        queryBuilder.append(PROJECT_BASIC_QUERY);
447
        String locale = request.getParameter("locale");
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449
        String format =  (request.getParameter("format") != null) ? request.getParameter("format") : "xml";
450
        checkFormatParameter(PROJECT_FORMATS, format);
451
        createResponseMeta(response, format);
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453
        format = finalFormat(format);
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455
        String sTransformer = request.getParameter("sTransformer");
456

    
457
        ParameterQueryEnhancer.enhanceProjectQueryWithOpenAIREIds(queryBuilder, request);
458
        ParameterQueryEnhancer.enhanceQueryWithProjectMetadataKeywords(queryBuilder, request);
459
        ParameterQueryEnhancer.enhanceQueryWithProjectFundingParams(queryBuilder, request);
460
        ParameterQueryEnhancer.enhanceProjectQueryWithFundingLevelParams(queryBuilder, request, vocabularyManager);
461
        ParameterQueryEnhancer.enhanceQueryWithParticipantsInfoParams(queryBuilder, request);
462
        ParameterQueryEnhancer.enhanceQueryWithYearParams(queryBuilder, request);
463
        ParameterQueryEnhancer.enhanceQueryWithSC39Params(queryBuilder, request);
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465
        ParameterQueryEnhancer.enhanceQueryWithProjectSortParameters(queryBuilder, request);
466

    
467
        FormattedSearchResult formattedSearchResult = null;
468
        try {
469
            formattedSearchResult = searchService.search(queryBuilder.toString(),sTransformer, format, locale, page, size);
470

    
471
        } catch (SearchServiceException e) {
472
            throw new Exception("Fail to execute search", e);
473
        }
474

    
475
        PrintWriter writer = response.getWriter();
476
        writer.append(formattedSearchResult.getFormattedResult());
477
        writer.close();
478
    }
479

    
480

    
481
    @ExceptionHandler(IllegalArgumentException.class)
482
    public @ResponseBody ResponseEntity<Error> invalidInput(HttpServletRequest request, HttpServletResponse httpServletResponse, Exception ex) {
483
        Error response = new Error();
484
        response.setStatus("error");
485
        response.setCode("400");
486
        response.setMessage("400 - Illegal argument exception.");
487
        response.setException(ex.getMessage());
488

    
489
        String format = (request.getParameter("format") == null)? "xml": request.getParameter("format").toLowerCase();
490

    
491
        registry.counter("http.status.400", "400", "uri").increment();
492

    
493
        return new ResponseEntity<Error>(response, HttpStatus.BAD_REQUEST);
494
    }
495

    
496
    private String finalFormat(String format) {
497
        if (format.equals("tsv")){
498
            return "project_tsv";
499

    
500
        } else if (format.equals("csv")) {
501
            return "project_csv";
502

    
503
        } else if (format.equals("html")) {
504
            return "project_html";
505
        }
506

    
507
        return format;
508
    }
509

    
510
    private String finalFormat(String format, String referrer) {
511
        if (referrer == null || referrer.isEmpty() || !referrer.equals("joomla")) {
512
            return finalFormat(format);
513
        }
514

    
515
        if (format.equals("tsv")){
516
            return "publication_tsv_notitle";
517

    
518
        } else if (format.equals("csv")) {
519
            return "publication_csv_notitle";
520

    
521
        }
522

    
523
        return format;
524
    }
525

    
526
    /** TODO: check if needed
527
     * Based on the given model the transformer to be used is defined
528
     * @param model
529
     * @return
530

    
531
    private String defineTransformer(String model) {
532
    if (model!=null && !model.trim().isEmpty()) {
533
    if (model.equals("openaire")) {
534
    return null;
535

    
536
    } else if (model.equals("sygma")) {
537
    return "results_openaire";
538
    }
539
    else if (model.equals("dc")) {
540
    return "dc";
541
    }
542

    
543
    throw new IllegalArgumentException("model '" + model + "' is not supported.");
544

    
545
    } else {
546
    return null;
547
    }
548
    }*/
549

    
550
    //TODO: check if needed
551
    private String defineTransformer(String model, String format) {
552
        if (model != null && !model.trim().isEmpty() && format != null && (format.equals("json")||format.equals("xml"))) {
553
            if (model.equals("openaire")) {
554
                return null;
555

    
556
            } else if (model.equals("sygma")) {
557
                return "results_openaire";
558
            }
559
            else if (model.equals("dc")) {
560
                return "dc";
561
            }
562

    
563
            throw new IllegalArgumentException("model '" + model + "' is not supported.");
564

    
565
        } else if (format != null && !format.trim().isEmpty()) {
566
            if (format.equals("rss") || format.equals("csv") || format.equals("tsv") || format.equals("html")) {
567
                return "results_openaire";
568
            }
569
        }
570
        return null;
571

    
572
    }
573

    
574
    private String defineFormatter(String model, String format, boolean isPublications, Collection<String> referrers) {
575
        if( model != null && !model.trim().isEmpty() ) {
576
            if (model.equals("sygma")) {
577

    
578
                if (isPublications) {
579
                    return "sygma_publication";
580
                }
581
                return "sygma_dataset";
582
            }
583
        } else {
584
            if (referrers != null && !referrers.isEmpty() && Iterables.get(referrers, 0) != null && !Iterables.get(referrers, 0).isEmpty()) {
585
                return finalFormat(format, Iterables.get(referrers, 0));
586
            } else {
587
                format = finalFormat(format);
588
            }
589
        }
590

    
591
        return null;
592
    }
593

    
594
    @Deprecated
595
    private void createXmlErrorPage(PrintWriter writer, Exception e) {
596
        writer.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
597
        writer.append("<error>");
598
        writer.append("<exception>")
599
                .append(StringEscapeUtils.escapeXml(e.getClass().getName()))
600
                .append("</exception>");
601
        if (e.getMessage() != null) {
602
            writer.append("<message>")
603
                    .append(StringEscapeUtils.escapeXml(e.getMessage()))
604
                    .append("</message>");
605
        }
606
        if (e.getCause() != null) {
607
            writer.append("<cause>")
608
                    .append(StringEscapeUtils.escapeXml(e.getCause()
609
                            .toString())).append("</cause>");
610
        }
611

    
612
        StackTraceElement[] trace = e.getStackTrace();
613
        writer.append("<trace>");
614
        for (int i = 0; i < trace.length; i++) {
615
            writer.append(StringEscapeUtils.escapeXml(trace[i].toString()))
616
                    .append("\n");
617
        }
618
        writer.append("</trace>");
619

    
620
        writer.append("</error>");
621
    }
622

    
623
    // Reading parameters from url and adding default values
624
    public int readParameter(HttpServletRequest request, String parameterName, int defaultValue) {
625
        String param = request.getParameter(parameterName);
626
        return (param != null && !param.isEmpty()) ? Integer.parseInt(param) : defaultValue;
627
    }
628

    
629
    private Collection<String> readParameter(HttpServletRequest request, String parameterName) {
630
        Collection<String> fields = null;
631
        String[] paramfields = request.getParameterValues(parameterName);
632
        if (paramfields != null) {
633
            fields = new ArrayList<String>();
634
            for (int i = 0; i < paramfields.length; i++) {
635
                fields.add(paramfields[i]);
636
            }
637
        }
638
        return fields;
639
    }
640

    
641
    /**
642
     * Checks if the requested result size exceeds the maximum allowed numbers of returned results
643
     * @param page the page parameter
644
     * @param size the size parameter
645
     */
646
    private void checkRequestSize(int page, int size) {
647
        int total = page*size;
648
        if (total > Integer.parseInt(maxResults)) {
649
            throw new IllegalArgumentException("Size and page arguments have exceeded the maximum number of returned results.");
650
        }
651
    }
652

    
653
    private String defineContentType(String format) {
654
        if (format != null) {
655
            if (format.equalsIgnoreCase("xml")) {
656
                return XML_CONTENT_TYPE;
657
            } else if (format.equalsIgnoreCase("json")) {
658
                return JSON_CONTENT_TYPE;
659

    
660
            } else if (format.equalsIgnoreCase("csv")) {
661
                return CSV_CONTENT_TYPE;
662

    
663
            } else if (format.equalsIgnoreCase("tsv")) {
664
                return TSV_CONTENT_TYPE;
665

    
666
            } else if (format.equalsIgnoreCase("html")){
667
                return HTML_CONTENT_TYPE;
668
            }
669
        }
670

    
671
        return XML_CONTENT_TYPE;
672
    }
673
    /**
674
     * Checks if the parameters given are allowed. The given parameters are checked against the allowed parameter
675
     * and the GLOBAL_PARAMETERS.
676
     * @param allowedParameters the allowed parameters
677
     * @param currentParameters the given parameters
678
     */
679
    private void checkParameters(List<String> allowedParameters, Map<String, String[]> currentParameters){
680
        if(currentParameters != null) {
681
            for (String parameter : currentParameters.keySet()) {
682
                if (!allowedParameters.contains(parameter) && !GLOBAL_PARAMETERS.contains(parameter) && !parameter.equals("referrer")) {
683
                    throw new IllegalArgumentException("Parameter " + parameter + " is not supported. The supported parameters are: " +
684
                            allowedParameters.toString().replace("[","").replace("]", ", ") + GLOBAL_PARAMETERS.toString().substring(1,GLOBAL_PARAMETERS.toString().length()-1));
685
                }
686
            }
687
        }
688
    }
689

    
690
    private void checkFormatParameter(List<String> allowedFormats, String requestedFormat) {
691
        if (requestedFormat!= null && !allowedFormats.contains(requestedFormat)) {
692
            throw new IllegalArgumentException("The requested format \'"+ requestedFormat +"\' is not supported. The supported formats are: " + allowedFormats);
693
        }
694
    }
695

    
696
    private static void checkModelParameter(List<String> allowedModels, String requestedModel) {
697
        if (requestedModel!= null && !allowedModels.contains(requestedModel)) {
698
            throw new IllegalArgumentException("The requested model \'"+ allowedModels +"\' is not supported. The supported formats are: " + allowedModels);
699
        }
700
    }
701

    
702
    private static boolean isModelSygma(String model) {
703
        if (model == null || model.isEmpty()) { return false; }
704

    
705
        if (!model.isEmpty() && !model.equals("sygma")) {
706
            return  false;
707
        }
708

    
709
        return true;
710
    }
711

    
712
    private void createResponseMeta( HttpServletResponse response, String format) {
713
        response.setContentType(defineContentType(format));
714
        response.setCharacterEncoding("UTF-8");
715

    
716
        if (!format.equals("xml") || !format.equals("json")) {
717

    
718
            SimpleDateFormat sdf = new SimpleDateFormat("ddMMyyyy");
719
            String date = sdf.format(new Date());
720

    
721
            if (format.equals("csv")) {
722
                response.setHeader("Content-Disposition", "filename="+date+".csv");
723

    
724
            } else if (format.equals("csv")) {
725
                response.setHeader("Content-Disposition", "filename="+date+".tsv");
726

    
727
            } else if (format.equals("html")) {
728
                response.setHeader("Content-Disposition", "filename="+date+".html");
729
            }
730
        }
731
    }
732

    
733

    
734
    /* TODO: enable if we decide to use ACCEPT Header as a priority to format parameter
735
    private String getFormat(HttpServletRequest request) {
736
        if (request.getParameter("format") == null && request.getHeader("Accept")!=null) {
737
            if (request.getHeader("Accept").equals(MediaType.APPLICATION_XML_VALUE) ||
738
                    request.getHeader("Accept").contains(MediaType.APPLICATION_XML_VALUE)){
739
                return "xml";
740
            }
741

    
742
            if (request.getHeader("Accept").equals(MediaType.APPLICATION_JSON_VALUE)){
743
                return "json";
744
            }
745
        }
746

    
747
        if (request.getParameter("format") == null && (request.getHeader("Accept")== null ||
748
                request.getHeader("Accept").equals(MediaType.ALL_VALUE))) {
749
            return "xml";
750
        }
751

    
752
        return request.getParameter("format");
753
    } */
754

    
755
    /*public static void main() throws IOException, SolrServerException {
756

    
757
        long time = System.currentTimeMillis();
758

    
759
        CloudSolrClient solrClient = new CloudSolrClient.Builder().
760
                withZkHost(Arrays.asList(new String[]{"quorum0.t.hadoop.research-infrastructures.eu:2182",
761
                        "quorum1.t.hadoop.research-infrastructures.eu:2182",
762
                        "quorum2.t.hadoop.research-infrastructures.eu:2182",
763
                        "quorum3.t.hadoop.research-infrastructures.eu:2182",
764
                        "quorum4.t.hadoop.research-infrastructures.eu:2182/solr-dev-openaire"})).build();
765
        solrClient.setDefaultCollection("DMF-index-openaire");
766

    
767
       // response.setContentType("text/html");
768
       // ServletOutputStream out=response.getOutputStream();
769

    
770
        NamedList<String> queryOpts = new NamedList<String>();
771

    
772
        //q=*:*&start=0&rows=10&cursorMark=*&sort=dateofcollection asc
773
        try {
774
            queryOpts.add("q", new CqlTranslatorImpl().getTranslatedQuery("(oaftype exact result) and (resulttypeid exact publication) and (relfundershortname exact \"nhmrc_______::NHMRC||National Health and Medical Research Council (NHMRC)||NHMRC\")").asLucene());
775

    
776
        } catch (CQLParseException e) {
777
            logger.error(e);
778
        }
779
        queryOpts.add("start", "0");
780
        queryOpts.add("rows", "500");
781
        queryOpts.add("fl", "__result");
782
        queryOpts.add("shards.tolerant","true");
783
        queryOpts.add("cursorMark", "*");
784
        queryOpts.add("sort", "__indexrecordidentifier asc");
785

    
786

    
787
        //queryOpts.add("q", new CqlTranslatorImpl().getTranslatedQuery("oaftype exact project").asLucene());
788
        NamedList<String> extraOpts = new NamedList<String>();
789

    
790
        QueryResponse resp = null;
791

    
792
        String cursorMark = "*";
793
        String nextCursorMark = "";
794

    
795
        //QueryResponse resp = solrClient.query(SolrParams.toSolrParams(queryOpts));
796

    
797
        int curs = 0;
798
        while (!cursorMark.equals(nextCursorMark)) {
799
            logger.debug("QUERY OPTS: " + queryOpts.get("cursorMark"));
800
            resp = solrClient.query(SolrParams.toSolrParams(queryOpts));
801
            logger.debug("TOTAL number " + resp.getResults().getNumFound());
802
            logger.debug(resp.getNextCursorMark());
803

    
804
            System.out.println("BEGIN");
805
            System.out.println("cursor " + cursorMark);
806
            System.out.println("next cursor " + nextCursorMark);
807

    
808
            cursorMark = nextCursorMark;
809
            nextCursorMark = resp.getNextCursorMark();
810

    
811
            for (int i = 0; i < resp.getResults().size(); i++) {
812
                String result = ((ArrayList<String>) resp.getResults().get(i).get("__result")).get(0);
813
             //   out.write(result.getBytes());
814
             //   out.flush();
815
            }
816

    
817
            System.out.println("END");
818
            System.out.println("cursor " + cursorMark);
819
            System.out.println("next cursor " + nextCursorMark);
820
            queryOpts.remove("cursorMark");
821
            queryOpts.add("cursorMark", nextCursorMark);
822

    
823
            System.out.println("CURS " + curs);
824
            curs ++;
825

    
826
        }
827

    
828
      //  out.close();
829

    
830
        time = System.currentTimeMillis() - time;
831
        System.out.println("Answer time " + time);
832
    }*/
833

    
834
}
(9-9/11)