semantic-void.net

import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
 
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.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
 
import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
 
/**
 * Utilities for parsing and converting XML DOMs.
 */
public class XMLUtilities {
 
	/**
	 * Parse a string containing XML.
	 *
	 * @param xmlString the XML string
	 * @return XML DOM document
	 * @throws ParserConfigurationException
	 * @throws SAXException
	 * @throws IOException
	 */
	public static Document parse(String xmlString) throws ParserConfigurationException, SAXException, IOException {
		// define inputs
		StringReader stringReader = new StringReader(xmlString);
		InputSource inputSource = new InputSource(stringReader);
		// parse inputs
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		DocumentBuilder builder = factory.newDocumentBuilder();
		Document document = builder.parse(inputSource);
		return document;
	}
 
	/**
	 * Convert XML DOM document to a string.
	 *
	 * @param document XML DOM document
	 * @return XML string
	 * @throws TransformerException
	 */
	public static String toString(Document document) throws TransformerException {
        StringWriter stringWriter = new StringWriter();
        StreamResult streamResult = new StreamResult(stringWriter);
        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        transformer.setOutputProperty(OutputKeys.METHOD, "xml");
        transformer.transform(new DOMSource(document.getDocumentElement()), streamResult);
        return stringWriter.toString();
	}
 
}