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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) {
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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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    }
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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;
362

    
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        try {
364
            formattedSearchResult =  searchService.search(queryBuilder.toString(),sTransformer, (newFormat!=null)?newFormat:format, locale, page, size);
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        } catch (Exception e) {
367
            logger.error("Fail to execute search.", e);
368
            throw new Exception("Fail to execute search", e);
369
        }
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        PrintWriter writer = response.getWriter();
372
        writer.append(formattedSearchResult.getFormattedResult());
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374
    }
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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)
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    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);
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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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395
        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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400
        StringBuilder queryBuilder = new StringBuilder();
401
        queryBuilder.append(OTHER_BASIC_QUERY);
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403
        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);
411
        ParameterQueryEnhancer.enhanceQueryWithDoi(queryBuilder, request);
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        ParameterQueryEnhancer.enhanceQueryWithResultsSortParameters(queryBuilder, request);
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415
        FormattedSearchResult formattedSearchResult = null;
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417
        //long start = System.currentTimeMillis();
418
        try {
419
            //Timer.Sample sample = Timer.start(metrics.getRegistry());
420
            formattedSearchResult =  searchService.search(queryBuilder.toString(),sTransformer, (newFormat!=null)?newFormat:format, locale, page, size);
421

    
422
        } catch (Exception e) {
423
            logger.error("Fail to execute search.", e);
424
            throw new Exception("Fail to execute search", e);
425
        }
426

    
427
        PrintWriter writer = response.getWriter();
428
        writer.append(formattedSearchResult.getFormattedResult());
429
    }
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431
    @RequestMapping(value = "/api/projects", method = RequestMethod.GET, produces = {MediaType.APPLICATION_XML_VALUE,MediaType.APPLICATION_JSON_VALUE})
432
    @Timed(value = "http.server.request.duration", extraTags = {"referer", "api", "uri", "/api/projects"}, longTask = false)
433
    public void searchProjects(HttpServletRequest request, HttpServletResponse response) throws Exception {
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435
        checkParameters(PROJECT_PARAMETERS, request.getParameterMap());
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437
        int page = readParameter(request, "page", 1);
438
        int size = readParameter(request, "size", 10);
439
        checkRequestSize(page, size);
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441
        StringBuilder queryBuilder = new StringBuilder();
442
        queryBuilder.append(PROJECT_BASIC_QUERY);
443
        String locale = request.getParameter("locale");
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445
        String format =  (request.getParameter("format") != null) ? request.getParameter("format") : "xml";
446
        checkFormatParameter(PROJECT_FORMATS, format);
447
        createResponseMeta(response, format);
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449
        format = finalFormat(format);
450

    
451
        String sTransformer = request.getParameter("sTransformer");
452

    
453
        ParameterQueryEnhancer.enhanceProjectQueryWithOpenAIREIds(queryBuilder, request);
454
        ParameterQueryEnhancer.enhanceQueryWithProjectMetadataKeywords(queryBuilder, request);
455
        ParameterQueryEnhancer.enhanceQueryWithProjectFundingParams(queryBuilder, request);
456
        ParameterQueryEnhancer.enhanceProjectQueryWithFundingLevelParams(queryBuilder, request, vocabularyManager);
457
        ParameterQueryEnhancer.enhanceQueryWithParticipantsInfoParams(queryBuilder, request);
458
        ParameterQueryEnhancer.enhanceQueryWithYearParams(queryBuilder, request);
459
        ParameterQueryEnhancer.enhanceQueryWithSC39Params(queryBuilder, request);
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461
        ParameterQueryEnhancer.enhanceQueryWithProjectSortParameters(queryBuilder, request);
462

    
463
        FormattedSearchResult formattedSearchResult = null;
464
        try {
465
            formattedSearchResult = searchService.search(queryBuilder.toString(),sTransformer, format, locale, page, size);
466

    
467
        } catch (SearchServiceException e) {
468
            throw new Exception("Fail to execute search", e);
469
        }
470

    
471
        PrintWriter writer = response.getWriter();
472
        writer.append(formattedSearchResult.getFormattedResult());
473
        writer.close();
474
    }
475

    
476

    
477
    @ExceptionHandler(IllegalArgumentException.class)
478
    public @ResponseBody ResponseEntity<Error> invalidInput(HttpServletRequest request, HttpServletResponse httpServletResponse, Exception ex) {
479
        Error response = new Error();
480
        response.setStatus("error");
481
        response.setCode("400");
482
        response.setMessage("400 - Illegal argument exception.");
483
        response.setException(ex.getMessage());
484

    
485
        String format = (request.getParameter("format") == null)? "xml": request.getParameter("format").toLowerCase();
486

    
487
        registry.counter("http.status.400", "400", "uri").increment();
488

    
489
        return new ResponseEntity<Error>(response, HttpStatus.BAD_REQUEST);
490
    }
491

    
492
    private String finalFormat(String format) {
493
        if (format.equals("tsv")){
494
            return "project_tsv";
495

    
496
        } else if (format.equals("csv")) {
497
            return "project_csv";
498

    
499
        } else if (format.equals("html")) {
500
            return "project_html";
501
        }
502

    
503
        return format;
504
    }
505

    
506
    private String finalFormat(String format, String referrer) {
507
        if (referrer == null || referrer.isEmpty() || !referrer.equals("joomla")) {
508
            return finalFormat(format);
509
        }
510

    
511
        if (format.equals("tsv")){
512
            return "publication_tsv_notitle";
513

    
514
        } else if (format.equals("csv")) {
515
            return "publication_csv_notitle";
516

    
517
        }
518

    
519
        return format;
520
    }
521

    
522
    /** TODO: check if needed
523
     * Based on the given model the transformer to be used is defined
524
     * @param model
525
     * @return
526

    
527
    private String defineTransformer(String model) {
528
    if (model!=null && !model.trim().isEmpty()) {
529
    if (model.equals("openaire")) {
530
    return null;
531

    
532
    } else if (model.equals("sygma")) {
533
    return "results_openaire";
534
    }
535
    else if (model.equals("dc")) {
536
    return "dc";
537
    }
538

    
539
    throw new IllegalArgumentException("model '" + model + "' is not supported.");
540

    
541
    } else {
542
    return null;
543
    }
544
    }*/
545

    
546
    //TODO: check if needed
547
    private String defineTransformer(String model, String format) {
548
        if (model != null && !model.trim().isEmpty() && format != null && (format.equals("json")||format.equals("xml"))) {
549
            if (model.equals("openaire")) {
550
                return null;
551

    
552
            } else if (model.equals("sygma")) {
553
                return "results_openaire";
554
            }
555
            else if (model.equals("dc")) {
556
                return "dc";
557
            }
558

    
559
            throw new IllegalArgumentException("model '" + model + "' is not supported.");
560

    
561
        } else if (format != null && !format.trim().isEmpty()) {
562
            if (format.equals("rss") || format.equals("csv") || format.equals("tsv") || format.equals("html")) {
563
                return "results_openaire";
564
            }
565
        }
566
        return null;
567

    
568
    }
569

    
570
    private String defineFormatter(String model, String format, boolean isPublications, Collection<String> referrers) {
571
        if( model != null && !model.trim().isEmpty() ) {
572
            if (model.equals("sygma")) {
573

    
574
                if (isPublications) {
575
                    return "sygma_publication";
576
                }
577
                return "sygma_dataset";
578
            }
579
        } else {
580
            if (referrers != null && !referrers.isEmpty() && Iterables.get(referrers, 0) != null && !Iterables.get(referrers, 0).isEmpty()) {
581
                return finalFormat(format, Iterables.get(referrers, 0));
582
            } else {
583
                format = finalFormat(format);
584
            }
585
        }
586

    
587
        return null;
588
    }
589

    
590
    @Deprecated
591
    private void createXmlErrorPage(PrintWriter writer, Exception e) {
592
        writer.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
593
        writer.append("<error>");
594
        writer.append("<exception>")
595
                .append(StringEscapeUtils.escapeXml(e.getClass().getName()))
596
                .append("</exception>");
597
        if (e.getMessage() != null) {
598
            writer.append("<message>")
599
                    .append(StringEscapeUtils.escapeXml(e.getMessage()))
600
                    .append("</message>");
601
        }
602
        if (e.getCause() != null) {
603
            writer.append("<cause>")
604
                    .append(StringEscapeUtils.escapeXml(e.getCause()
605
                            .toString())).append("</cause>");
606
        }
607

    
608
        StackTraceElement[] trace = e.getStackTrace();
609
        writer.append("<trace>");
610
        for (int i = 0; i < trace.length; i++) {
611
            writer.append(StringEscapeUtils.escapeXml(trace[i].toString()))
612
                    .append("\n");
613
        }
614
        writer.append("</trace>");
615

    
616
        writer.append("</error>");
617
    }
618

    
619
    // Reading parameters from url and adding default values
620
    public int readParameter(HttpServletRequest request, String parameterName, int defaultValue) {
621
        String param = request.getParameter(parameterName);
622
        return (param != null && !param.isEmpty()) ? Integer.parseInt(param) : defaultValue;
623
    }
624

    
625
    private Collection<String> readParameter(HttpServletRequest request, String parameterName) {
626
        Collection<String> fields = null;
627
        String[] paramfields = request.getParameterValues(parameterName);
628
        if (paramfields != null) {
629
            fields = new ArrayList<String>();
630
            for (int i = 0; i < paramfields.length; i++) {
631
                fields.add(paramfields[i]);
632
            }
633
        }
634
        return fields;
635
    }
636

    
637
    /**
638
     * Checks if the requested result size exceeds the maximum allowed numbers of returned results
639
     * @param page the page parameter
640
     * @param size the size parameter
641
     */
642
    private void checkRequestSize(int page, int size) {
643
        int total = page*size;
644
        if (total > Integer.parseInt(maxResults)) {
645
            throw new IllegalArgumentException("Size and page arguments have exceeded the maximum number of returned results.");
646
        }
647
    }
648

    
649
    private String defineContentType(String format) {
650
        if (format != null) {
651
            if (format.equalsIgnoreCase("xml")) {
652
                return XML_CONTENT_TYPE;
653
            } else if (format.equalsIgnoreCase("json")) {
654
                return JSON_CONTENT_TYPE;
655

    
656
            } else if (format.equalsIgnoreCase("csv")) {
657
                return CSV_CONTENT_TYPE;
658

    
659
            } else if (format.equalsIgnoreCase("tsv")) {
660
                return TSV_CONTENT_TYPE;
661

    
662
            } else if (format.equalsIgnoreCase("html")){
663
                return HTML_CONTENT_TYPE;
664
            }
665
        }
666

    
667
        return XML_CONTENT_TYPE;
668
    }
669
    /**
670
     * Checks if the parameters given are allowed. The given parameters are checked against the allowed parameter
671
     * and the GLOBAL_PARAMETERS.
672
     * @param allowedParameters the allowed parameters
673
     * @param currentParameters the given parameters
674
     */
675
    private void checkParameters(List<String> allowedParameters, Map<String, String[]> currentParameters){
676
        if(currentParameters != null) {
677
            for (String parameter : currentParameters.keySet()) {
678
                if (!allowedParameters.contains(parameter) && !GLOBAL_PARAMETERS.contains(parameter) && !parameter.equals("referrer")) {
679
                    throw new IllegalArgumentException("Parameter " + parameter + " is not supported. The supported parameters are: " +
680
                            allowedParameters.toString().replace("[","").replace("]", ", ") + GLOBAL_PARAMETERS.toString().substring(1,GLOBAL_PARAMETERS.toString().length()-1));
681
                }
682
            }
683
        }
684
    }
685

    
686
    private void checkFormatParameter(List<String> allowedFormats, String requestedFormat) {
687
        if (requestedFormat!= null && !allowedFormats.contains(requestedFormat)) {
688
            throw new IllegalArgumentException("The requested format \'"+ requestedFormat +"\' is not supported. The supported formats are: " + allowedFormats);
689
        }
690
    }
691

    
692
    private static void checkModelParameter(List<String> allowedModels, String requestedModel) {
693
        if (requestedModel!= null && !allowedModels.contains(requestedModel)) {
694
            throw new IllegalArgumentException("The requested model \'"+ allowedModels +"\' is not supported. The supported formats are: " + allowedModels);
695
        }
696
    }
697

    
698
    private static boolean isModelSygma(String model) {
699
        if (model == null || model.isEmpty()) { return false; }
700

    
701
        if (!model.isEmpty() && !model.equals("sygma")) {
702
            return  false;
703
        }
704

    
705
        return true;
706
    }
707

    
708
    private void createResponseMeta( HttpServletResponse response, String format) {
709
        response.setContentType(defineContentType(format));
710
        response.setCharacterEncoding("UTF-8");
711

    
712
        if (!format.equals("xml") || !format.equals("json")) {
713

    
714
            SimpleDateFormat sdf = new SimpleDateFormat("ddMMyyyy");
715
            String date = sdf.format(new Date());
716

    
717
            if (format.equals("csv")) {
718
                response.setHeader("Content-Disposition", "filename="+date+".csv");
719

    
720
            } else if (format.equals("csv")) {
721
                response.setHeader("Content-Disposition", "filename="+date+".tsv");
722

    
723
            } else if (format.equals("html")) {
724
                response.setHeader("Content-Disposition", "filename="+date+".html");
725
            }
726
        }
727
    }
728

    
729

    
730
    /* TODO: enable if we decide to use ACCEPT Header as a priority to format parameter
731
    private String getFormat(HttpServletRequest request) {
732
        if (request.getParameter("format") == null && request.getHeader("Accept")!=null) {
733
            if (request.getHeader("Accept").equals(MediaType.APPLICATION_XML_VALUE) ||
734
                    request.getHeader("Accept").contains(MediaType.APPLICATION_XML_VALUE)){
735
                return "xml";
736
            }
737

    
738
            if (request.getHeader("Accept").equals(MediaType.APPLICATION_JSON_VALUE)){
739
                return "json";
740
            }
741
        }
742

    
743
        if (request.getParameter("format") == null && (request.getHeader("Accept")== null ||
744
                request.getHeader("Accept").equals(MediaType.ALL_VALUE))) {
745
            return "xml";
746
        }
747

    
748
        return request.getParameter("format");
749
    } */
750

    
751
    /*public static void main() throws IOException, SolrServerException {
752

    
753
        long time = System.currentTimeMillis();
754

    
755
        CloudSolrClient solrClient = new CloudSolrClient.Builder().
756
                withZkHost(Arrays.asList(new String[]{"quorum0.t.hadoop.research-infrastructures.eu:2182",
757
                        "quorum1.t.hadoop.research-infrastructures.eu:2182",
758
                        "quorum2.t.hadoop.research-infrastructures.eu:2182",
759
                        "quorum3.t.hadoop.research-infrastructures.eu:2182",
760
                        "quorum4.t.hadoop.research-infrastructures.eu:2182/solr-dev-openaire"})).build();
761
        solrClient.setDefaultCollection("DMF-index-openaire");
762

    
763
       // response.setContentType("text/html");
764
       // ServletOutputStream out=response.getOutputStream();
765

    
766
        NamedList<String> queryOpts = new NamedList<String>();
767

    
768
        //q=*:*&start=0&rows=10&cursorMark=*&sort=dateofcollection asc
769
        try {
770
            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());
771

    
772
        } catch (CQLParseException e) {
773
            logger.error(e);
774
        }
775
        queryOpts.add("start", "0");
776
        queryOpts.add("rows", "500");
777
        queryOpts.add("fl", "__result");
778
        queryOpts.add("shards.tolerant","true");
779
        queryOpts.add("cursorMark", "*");
780
        queryOpts.add("sort", "__indexrecordidentifier asc");
781

    
782

    
783
        //queryOpts.add("q", new CqlTranslatorImpl().getTranslatedQuery("oaftype exact project").asLucene());
784
        NamedList<String> extraOpts = new NamedList<String>();
785

    
786
        QueryResponse resp = null;
787

    
788
        String cursorMark = "*";
789
        String nextCursorMark = "";
790

    
791
        //QueryResponse resp = solrClient.query(SolrParams.toSolrParams(queryOpts));
792

    
793
        int curs = 0;
794
        while (!cursorMark.equals(nextCursorMark)) {
795
            logger.debug("QUERY OPTS: " + queryOpts.get("cursorMark"));
796
            resp = solrClient.query(SolrParams.toSolrParams(queryOpts));
797
            logger.debug("TOTAL number " + resp.getResults().getNumFound());
798
            logger.debug(resp.getNextCursorMark());
799

    
800
            System.out.println("BEGIN");
801
            System.out.println("cursor " + cursorMark);
802
            System.out.println("next cursor " + nextCursorMark);
803

    
804
            cursorMark = nextCursorMark;
805
            nextCursorMark = resp.getNextCursorMark();
806

    
807
            for (int i = 0; i < resp.getResults().size(); i++) {
808
                String result = ((ArrayList<String>) resp.getResults().get(i).get("__result")).get(0);
809
             //   out.write(result.getBytes());
810
             //   out.flush();
811
            }
812

    
813
            System.out.println("END");
814
            System.out.println("cursor " + cursorMark);
815
            System.out.println("next cursor " + nextCursorMark);
816
            queryOpts.remove("cursorMark");
817
            queryOpts.add("cursorMark", nextCursorMark);
818

    
819
            System.out.println("CURS " + curs);
820
            curs ++;
821

    
822
        }
823

    
824
      //  out.close();
825

    
826
        time = System.currentTimeMillis() - time;
827
        System.out.println("Answer time " + time);
828
    }*/
829

    
830
}
(9-9/11)