D-Net

/**

 * 

 */

package eu.dnetlib.data.search.web;

import java.io.IOException;

import java.io.StringReader;

import java.io.StringWriter;

import javax.servlet.ServletContext;

import javax.servlet.http.HttpServletRequest;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.transform.OutputKeys;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerConfigurationException;

import javax.xml.transform.TransformerException;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.TransformerFactoryConfigurationError;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

import org.springframework.context.ApplicationContext;

import org.springframework.web.context.support.WebApplicationContextUtils;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.xml.sax.InputSource;

import org.xml.sax.SAXException;

import eu.dnetlib.api.data.SearchService;

import gr.uoa.di.driver.enabling.resultset.ResultSetFactory;

/**

 * @author stoumpos

 * 

 */

public class SearchServiceContextUtils {

	public static SearchService getSearchService(HttpServletRequest request) {

		ServletContext session = request.getSession().getServletContext();

		ApplicationContext context = WebApplicationContextUtils

				.getWebApplicationContext(session);

		SearchService search = (SearchService) context.getBean("searchService");

		return search;

	}

	public static ResultSetFactory getResultSetFactory(

			HttpServletRequest request) {

		ServletContext session = request.getSession().getServletContext();

		ApplicationContext context = WebApplicationContextUtils

				.getWebApplicationContext(session);

		ResultSetFactory rsFactory = (ResultSetFactory) context

				.getBean("resultSetFactory");

		return rsFactory;

	}

	public static final String prettyPrint(String xml)

			throws TransformerConfigurationException,

			TransformerFactoryConfigurationError, TransformerException,

			SAXException, IOException, ParserConfigurationException {

		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

		dbf.setValidating(true);

		DocumentBuilder db = dbf.newDocumentBuilder();

		InputSource sourceXML = new InputSource(new StringReader(xml));

		Document xmlDoc = db.parse(sourceXML);

		Element source = xmlDoc.getDocumentElement();

		source.normalize();

		StreamResult target = new StreamResult(new StringWriter());

		Transformer tf = TransformerFactory.newInstance().newTransformer();

		tf.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");

		tf.setOutputProperty(OutputKeys.ENCODING, "UTF-8");

		tf.setOutputProperty(OutputKeys.INDENT, "yes");

		tf.transform(new DOMSource(source), target);

		return target.getWriter().toString();

	}

}