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package eu.dnetlib.openaire.blacklist;
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import java.io.StringReader;
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import java.util.List;
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import org.apache.commons.lang.StringUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.solr.client.solrj.SolrQuery;
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import org.apache.solr.client.solrj.impl.CloudSolrServer;
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import org.apache.solr.client.solrj.response.QueryResponse;
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import org.apache.solr.common.SolrDocument;
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import org.apache.solr.common.SolrDocumentList;
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import org.dom4j.Attribute;
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import org.dom4j.Document;
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import org.dom4j.DocumentException;
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import org.dom4j.io.SAXReader;
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import org.springframework.beans.factory.annotation.Autowired;
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import com.google.common.base.Function;
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import com.google.common.collect.Iterables;
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import com.google.common.collect.Lists;
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import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;
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import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
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import eu.dnetlib.enabling.locators.UniqueServiceLocator;
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/**
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* The goal of this task is to return the original identifiers of objects merged in a representative object by deduplication. Created by
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* alessia on 09/02/16.
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*/
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public class OpenaireIdResolver {
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public final static String SOLR_COLLECTION_POSTFIX = "-index-openaire";
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private static final Log log = LogFactory.getLog(OpenaireIdResolver.class);
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private final static String RESULT_FIELD = "__result";
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private final static String XPATH_TO_MERGED = "//*[local-name()='entity']/*//children/result/@objidentifier";
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private final SAXReader saxReader = new SAXReader();
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@Autowired
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private UniqueServiceLocator serviceLocator;
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public List<String> resolveIdentifier(final String id) {
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if (StringUtils.isBlank(id)) return Lists.newArrayList();
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else {
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return findOriginalIds(id);
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}
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}
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protected List<String> findOriginalIds(final String id) {
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CloudSolrServer solrCore = null;
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final SolrQuery q = new SolrQuery("objidentifier:\"" + id + "\"");
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QueryResponse response = null;
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try {
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solrCore = new CloudSolrServer(getIndexEndpoint());
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solrCore.setDefaultCollection(getPublicIndexCollection() + SOLR_COLLECTION_POSTFIX);
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response = solrCore.query(q);
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final SolrDocumentList results = response.getResults();
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if (results.isEmpty()) {
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log.debug("Query " + q + " returned 0 documents");
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return Lists.newArrayList();
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}
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// my results contain the document with the given identifier
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final SolrDocument solrDoc = results.get(0);
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return extractMergedIdentifiers(solrDoc);
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} catch (final Exception e) {
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log.error("Can't get original ids for " + id + "\n ", e);
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throw new RuntimeException("Can't get original ids for " + id + "\n " + e);
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} finally {
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solrCore.shutdown();
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}
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}
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@SuppressWarnings("unchecked")
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protected List<String> extractMergedIdentifiers(final SolrDocument doc) throws DocumentException {
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final String xmlRecord = (String) doc.getFirstValue(RESULT_FIELD);
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final Document xmlDoc = this.saxReader.read(new StringReader(xmlRecord));
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return Lists.newArrayList(Iterables.transform(xmlDoc.selectNodes(XPATH_TO_MERGED), new Function<Attribute, String>() {
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@Override
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public String apply(final Attribute a) {
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return a.getStringValue();
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}
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}));
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}
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protected String getIndexEndpoint() throws ISLookUpException {
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return this.serviceLocator.getService(ISLookUpService.class).getResourceProfileByQuery(
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"for $x in collection('/db/DRIVER/ServiceResources/IndexServiceResourceType') return $x//PROTOCOL[./@name='solr']/@address/string()");
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}
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protected String getPublicIndexCollection() throws ISLookUpException {
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return this.serviceLocator.getService(ISLookUpService.class).getResourceProfileByQuery(
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"for $x in collection('/db/DRIVER/ServiceResources/SearchServiceResourceType') return $x[.//PROPERTY[@key='infrastructure']/@value='public']//PROPERTY[@key='mdformat']/@value/string()");
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}
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public UniqueServiceLocator getServiceLocator() {
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return serviceLocator;
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}
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public void setServiceLocator(final UniqueServiceLocator serviceLocator) {
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this.serviceLocator = serviceLocator;
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}
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}
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