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package eu.dnetlib.parthenos.registry;
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import java.util.Map;
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import com.google.common.collect.Maps;
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import eu.dnetlib.parthenos.publisher.ParthenosPublisherException;
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import eu.dnetlib.parthenos.publisher.SaxonHelper;
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import net.sf.saxon.s9api.SaxonApiException;
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import net.sf.saxon.s9api.Serializer;
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import net.sf.saxon.s9api.XPathSelector;
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import org.apache.commons.lang3.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.gcube.informationsystem.resourceregistry.client.ResourceRegistryClient;
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import org.gcube.informationsystem.resourceregistry.client.ResourceRegistryClientFactory;
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import org.gcube.informationsystem.resourceregistry.publisher.ResourceRegistryPublisher;
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import org.gcube.informationsystem.resourceregistry.publisher.ResourceRegistryPublisherFactory;
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/**
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* Created by Alessia Bardi on 26/09/2017.
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*
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* @author Alessia Bardi
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*/
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public class RegistryClient {
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private static final Log log = LogFactory.getLog(RegistryClient.class);
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private static final String OAI_NAMESPACE_URI = "http://www.openarchives.org/OAI/2.0/";
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private static final String DRI_NAMESPACE_URI = "http://www.driver-repository.eu/namespace/dri";
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private static final String RDF_NAMESPACE_URI = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
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private GCubeResourceRegistrator gCubeResourceRegistrator;
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private SaxonHelper saxonHelper;
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private XPathSelector xpathSelectorObjIdentifier;
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private XPathSelector xpathSelectorRDF;
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private ResourceRegistryPublisher resourceRegistryPublisher;
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private ResourceRegistryClient resourceRegistryClient;
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private String defaultBaseURI;
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protected RegistryClient(final SaxonHelper saxonHelper,
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final String defaultBaseURI,
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final GCubeResourceRegistrator gCubeResourceRegistrator)
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throws ParthenosPublisherException {
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this.saxonHelper = saxonHelper;
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this.defaultBaseURI = defaultBaseURI;
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this.resourceRegistryPublisher = ResourceRegistryPublisherFactory.create();
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this.resourceRegistryClient = ResourceRegistryClientFactory.create();
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this.gCubeResourceRegistrator = gCubeResourceRegistrator;
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try {
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prepareXpathSelectors();
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} catch (SaxonApiException e) {
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throw new ParthenosPublisherException(e);
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}
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}
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public int unregister(final String datasourceInterface) {
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return gCubeResourceRegistrator.unregister(datasourceInterface);
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}
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public void register(final String record) throws ParthenosPublisherException {
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try {
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if (StringUtils.isBlank(record)) {
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log.warn("Got empty record");
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}
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String objIdentifier = extractFromRecord(record, xpathSelectorObjIdentifier);
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if (StringUtils.isBlank(objIdentifier)) {
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log.warn("Got record with no objIdentifier -- skipping");
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}
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String recordRDF = extractFromRecord(record, xpathSelectorRDF);
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gCubeResourceRegistrator.register(recordRDF, objIdentifier);
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} catch (Throwable e) {
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log.error(e.getMessage());
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throw new ParthenosPublisherException(e);
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}
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}
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private void prepareXpathSelectors() throws SaxonApiException {
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Map<String, String> namespaces = Maps.newHashMap();
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namespaces.put("oai", OAI_NAMESPACE_URI);
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namespaces.put("dri", DRI_NAMESPACE_URI);
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namespaces.put("rdf", RDF_NAMESPACE_URI);
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xpathSelectorObjIdentifier = this.saxonHelper.help().prepareXPathSelector("//oai:header/dri:objIdentifier/text()", namespaces);
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xpathSelectorRDF = this.saxonHelper.help().prepareXPathSelector("//oai:metadata/rdf:RDF", namespaces);
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}
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private String extractFromRecord(final String record, final XPathSelector xPathSelector) {
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try {
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return this.saxonHelper.help().setSerializerProperty(Serializer.Property.OMIT_XML_DECLARATION, "yes").evaluateSingleAsString(record, xPathSelector);
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} catch (SaxonApiException e) {
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throw new RuntimeException("Cannot extract content ", e);
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}
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}
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public void setSaxonHelper(final SaxonHelper saxonHelper) {
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this.saxonHelper = saxonHelper;
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}
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public void setDefaultBaseURI(final String defaultBaseURI) {
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this.defaultBaseURI = defaultBaseURI;
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}
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public SaxonHelper getSaxonHelper() {
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return saxonHelper;
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}
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public String getDefaultBaseURI() {
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return defaultBaseURI;
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}
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public GCubeResourceRegistrator getgCubeResourceRegistrator() {
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return gCubeResourceRegistrator;
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}
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public void setgCubeResourceRegistrator(final GCubeResourceRegistrator gCubeResourceRegistrator) {
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this.gCubeResourceRegistrator = gCubeResourceRegistrator;
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}
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public ResourceRegistryPublisher getResourceRegistryPublisher() {
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return resourceRegistryPublisher;
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}
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public void setResourceRegistryPublisher(final ResourceRegistryPublisher resourceRegistryPublisher) {
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this.resourceRegistryPublisher = resourceRegistryPublisher;
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}
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public ResourceRegistryClient getResourceRegistryClient() {
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return resourceRegistryClient;
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}
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public void setResourceRegistryClient(final ResourceRegistryClient resourceRegistryClient) {
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this.resourceRegistryClient = resourceRegistryClient;
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}
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}
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