D-Net

package eu.dnetlib.data.mapreduce.hbase.statsExport.utils;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.stream.StreamResult;

import javax.xml.transform.stream.StreamSource;

import org.apache.log4j.Logger;

public class ContextTransformer {

	private Logger log = Logger.getLogger(this.getClass());

	public String transformXSL(String xml) throws Exception {

		Transformer transformer;

		TransformerFactory tFactory = TransformerFactory.newInstance();

		if (xml == null || xml.isEmpty()) {

			throw new Exception("NULL ENTITY CONFIGURATION   : ");

		}

		InputStream inputStream = null;

		ByteArrayInputStream readerStream = null;

		ByteArrayOutputStream writerStream = null;

		try {

			inputStream = ClassLoader.getSystemResourceAsStream("eu/dnetlib/data/mapreduce/hbase/statsExport/" + "context.xsl");

			transformer = tFactory.newTransformer(new StreamSource(inputStream));

			readerStream = new ByteArrayInputStream(xml.getBytes("UTF8"));

			writerStream = new ByteArrayOutputStream();

			transformer.transform(new StreamSource(readerStream), new StreamResult(writerStream));

			return writerStream.toString("UTF8");

		} catch (Exception e) {

			log.error(e.getMessage());

			throw new Exception(e.getMessage(), e);

		} finally {

			inputStream.close();

			readerStream.close();

			writerStream.close();

		}

	}

}