D-Net

package eu.dnetlib.enabling.inspector;

import java.util.Iterator;

import java.util.List;

import java.util.Spliterator;

import java.util.Spliterators;

import java.util.stream.Collectors;

import java.util.stream.StreamSupport;

import javax.annotation.Resource;

import eu.dnetlib.xml.database.XMLDatabase;

import org.apache.commons.lang3.StringEscapeUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import org.xmldb.api.base.XMLDBException;

/**

 * This controller offers a simple way to run arbitrary queries on the xmldb.

 *

 * @author marko

 *

 */

@Controller

public class QueryController extends AbstractInspectorController {

	/**

	 * logger.

	 */

	private static final Log log = LogFactory.getLog(QueryController.class); // NOPMD by marko on 11/24/08 5:02 PM

	/**

	 * xmldb.

	 */

	@Resource(name = "existDatabase")

	private transient XMLDatabase xmlDatabase;

	/**

	 * utility to parse resource ids and allows to navigate them.

	 */

	@Resource(name = "resourcelinkTool")

	private ResourceLinkTool linkTool;	

	/**

	 * run a query.

	 *

	 * @param model

	 *            mvc model

	 * @param query

	 *            query (optional)

	 * @throws

	 */

	@RequestMapping(value = "/inspector/query.do")

	void query(final Model model, @RequestParam(value = "query", required = false) final String query) {

		if (query != null) {

			log.info("running query: " + query);

			try {

				final Iterator<String> it = xmlDatabase.xquery(query);

				final List<String> res = StreamSupport.stream(Spliterators.spliteratorUnknownSize(it, Spliterator.IMMUTABLE), false)

						.map(StringEscapeUtils::escapeHtml4)

						.map(linkTool::linkfyToHtml)

						.collect(Collectors.toList());

				model.addAttribute("size", res.size());

				model.addAttribute("results", res);

			} catch (XMLDBException e) {

				model.addAttribute("message", "failed: " + e.getMessage());

			}

		}

		model.addAttribute("query", query);

	}

}