D-Net

package eu.dnetlib.msro.workflows.nodes.index;

import java.io.IOException;

import java.io.StringReader;

import java.io.StringWriter;

import javax.annotation.Resource;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerConfigurationException;

import javax.xml.transform.TransformerException;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.dom.DOMResult;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

import javax.xml.transform.stream.StreamSource;

import javax.xml.ws.wsaddressing.W3CEndpointReference;

import org.apache.commons.codec.binary.Base64;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

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

import com.googlecode.sarasvati.NodeToken;

import eu.dnetlib.data.provision.index.rmi.IndexService;

import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpDocumentNotFoundException;

import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;

import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;

import eu.dnetlib.enabling.locators.UniqueServiceLocator;

import eu.dnetlib.enabling.resultset.XSLTMappedResultSetFactory;

import eu.dnetlib.enabling.resultset.client.utils.EPRUtils;

import eu.dnetlib.enabling.resultset.rmi.ResultSetException;

import eu.dnetlib.enabling.tools.blackboard.BlackboardJob;

import eu.dnetlib.msro.workflows.nodes.BlackboardJobNode;

import eu.dnetlib.msro.workflows.nodes.ProgressJobNode;

import eu.dnetlib.msro.workflows.resultset.ProcessCountingResultSetFactory;

import eu.dnetlib.msro.workflows.util.ProgressProvider;

import eu.dnetlib.msro.workflows.util.ResultsetProgressProvider;

public class UpdateIndexJobNode extends BlackboardJobNode implements ProgressJobNode {

	private static final Log log = LogFactory.getLog(UpdateIndexJobNode.class);

	private String eprParam;

	private String indexId;

	private String format;

	private String layout;

	private String feedingType;

	private String defaultIndexId;

	/**

	 * xslt mapped resultset factory.

	 */

	private XSLTMappedResultSetFactory xsltRSFactory;

	private ProcessCountingResultSetFactory processCountingResultSetFactory;

	private ResultsetProgressProvider progressProvider;

	/**

	 * Stylesheet which transforms a layout to another stylesheet which converts a input record to a index record.

	 */

	private org.springframework.core.io.Resource layoutToRecordStylesheet;

	/**

	 * service locator.

	 */

	@Resource

	private UniqueServiceLocator serviceLocator;

	@Override

	protected String obtainServiceId(final NodeToken token) {

		return getServiceLocator().getServiceId(IndexService.class);

	}

	@Override

	protected void prepareJob(final BlackboardJob job, final NodeToken token) throws ResultSetException, ISLookUpException, IOException, TransformerException {

		log.info("preparing blackboard job update index: " + getIndexId());

		final W3CEndpointReference epr = new EPRUtils().getEpr(token.getEnv().getAttribute(getEprParam()));

		final W3CEndpointReference mappedEpr = prepareForIndexing(epr, getFormat(), getLayout());

		progressProvider = processCountingResultSetFactory.createProgressProvider(token.getProcess(), mappedEpr);

		job.setAction("FEED");

		job.getParameters().put("resultset_epr", encode(progressProvider.getEpr().toString()));

		job.getParameters().put("id", getIndexId());

		job.getParameters().put("feeding_type", getFeedingType());

		job.getParameters().put("backend_Id", defaultIndexId);

	}

	// helpers

	/**

	 * Transforms each mdstore record into a index record.

	 * 

	 * @param mdStoreRsetEpr

	 *            mdstore resulsetset

	 * @param layout

	 *            layout

	 * @param format

	 *            format

	 * @return resultset with transformed records

	 * @throws ISLookUpException

	 *             could happen

	 * @throws IOException

	 *             could happen

	 * @throws TransformerException

	 *             could happen

	 */

	protected W3CEndpointReference prepareForIndexing(final W3CEndpointReference mdStoreRsetEpr, final String format, final String layout)

			throws ISLookUpException, IOException, TransformerException {

		final TransformerFactory factory = TransformerFactory.newInstance();

		final Transformer layoutTransformer = factory.newTransformer(new StreamSource(getLayoutToRecordStylesheet().getInputStream()));

		final DOMResult layoutToXsltXslt = new DOMResult();

		layoutTransformer.setParameter("format", format);

		layoutTransformer.transform(new StreamSource(new StringReader(getLayoutSource(format, layout))), layoutToXsltXslt);

		dumpXslt(factory, layoutToXsltXslt);

		return getXsltRSFactory().createMappedResultSet(mdStoreRsetEpr, new DOMSource(layoutToXsltXslt.getNode()),

				"dynamic layout xslt for " + format + ", " + layout);

	}

	private String getLayoutSource(final String format, final String layout) throws ISLookUpDocumentNotFoundException, ISLookUpException {

		return serviceLocator.getService(ISLookUpService.class).getResourceProfileByQuery(

				"collection('')//RESOURCE_PROFILE[.//RESOURCE_TYPE/@value = 'MDFormatDSResourceType' and .//NAME='" + format + "']//LAYOUT[@name='" + layout

						+ "']");

	}

	private void dumpXslt(final TransformerFactory factory, final DOMResult layoutToXsltXslt) throws TransformerConfigurationException, TransformerException {

		if (log.isDebugEnabled()) {

			final StringWriter buffer = new StringWriter();

			factory.newTransformer().transform(new DOMSource(layoutToXsltXslt.getNode()), new StreamResult(buffer));

			log.debug(buffer.toString());

		}

	}

	private String encode(final String epr) {

		return new String(Base64.encodeBase64(epr.getBytes()));

	}

	// setters and getters

	public String getIndexId() {

		return indexId;

	}

	public void setIndexId(final String indexId) {

		this.indexId = indexId;

	}

	public String getEprParam() {

		return eprParam;

	}

	public void setEprParam(final String eprParam) {

		this.eprParam = eprParam;

	}

	public String getFeedingType() {

		return feedingType;

	}

	public void setFeedingType(final String feedingType) {

		this.feedingType = feedingType;

	}

	public ProcessCountingResultSetFactory getProcessCountingResultSetFactory() {

		return processCountingResultSetFactory;

	}

	@Required

	public void setProcessCountingResultSetFactory(final ProcessCountingResultSetFactory processCountingResultSetFactory) {

		this.processCountingResultSetFactory = processCountingResultSetFactory;

	}

	@Override

	public ProgressProvider getProgressProvider() {

		return progressProvider;

	}

	public org.springframework.core.io.Resource getLayoutToRecordStylesheet() {

		return layoutToRecordStylesheet;

	}

	@Required

	public void setLayoutToRecordStylesheet(final org.springframework.core.io.Resource layoutToRecordStylesheet) {

		this.layoutToRecordStylesheet = layoutToRecordStylesheet;

	}

	public String getFormat() {

		return format;

	}

	public void setFormat(final String format) {

		this.format = format;

	}

	public String getLayout() {

		return layout;

	}

	public void setLayout(final String layout) {

		this.layout = layout;

	}

	public XSLTMappedResultSetFactory getXsltRSFactory() {

		return xsltRSFactory;

	}

	@Required

	public void setXsltRSFactory(final XSLTMappedResultSetFactory xsltRSFactory) {

		this.xsltRSFactory = xsltRSFactory;

	}

	/**

	 * @return the defaultIndexId

	 */

	public String getDefaultIndexId() {

		return defaultIndexId;

	}

	/**

	 * @param defaultIndexId

	 *            the defaultIndexId to set

	 */

	@Required

	public void setDefaultIndexId(final String defaultIndexId) {

		this.defaultIndexId = defaultIndexId;

	}

}