/**

  * Alt2XML

  * Copyright © 2014 František Kučera (frantovo.cz)

  *

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, either version 3 of the License, or

  * (at your option) any later version.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program. If not, see <http://www.gnu.org/licenses/>.

  */

 package cz.frantovo.alt2xml.cli;

 import javax.xml.stream.XMLStreamException;

 import javax.xml.stream.XMLStreamWriter;

 import org.xml.sax.Attributes;

 import org.xml.sax.SAXException;

 import org.xml.sax.helpers.DefaultHandler;

 /**

  * Slouží k převodu právě parsovaného XML zpět na XML.

  * Určen pro testování a ladění a pro použití s neobvyklými „XML“ parsery,

  * které nečtou XML ale jiný jazyk (např. JSON, INI atd.), ale používají stejné rozhraní (SAX).

  * 

  * TODO: další typy uzlů a jmenné prostory.

  * @author fiki

  */

 public class EchoContentHandler extends DefaultHandler {

 	private XMLStreamWriter w;

 	/**

 	 * @param writer kam se bude vypisovat XML.

 	 */

 	public EchoContentHandler(XMLStreamWriter writer) {

 		w = writer;

 	}

 	@Override

 	public void startDocument() throws SAXException {

 		try {

 			w.writeStartDocument();

 		} catch (XMLStreamException e) {

 			throw new SAXException(e);

 		}

 	}

 	@Override

 	public void endDocument() throws SAXException {

 		try {

 			w.writeEndDocument();

 			w.close();

 		} catch (XMLStreamException e) {

 			throw new SAXException(e);

 		}

 	}

 	@Override

 	public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

 		try {

 			w.writeStartElement(qName);

 			if (attributes != null) {

 				for (int i = 0; i < attributes.getLength(); i++) {

 					w.writeAttribute(attributes.getQName(i), attributes.getValue(i));

 				}

 			}

 			w.flush();

 		} catch (XMLStreamException e) {

 			throw new SAXException(e);

 		}

 	}

 	@Override

 	public void endElement(String uri, String localName, String qName) throws SAXException {

 		try {

 			w.writeEndElement();

 			w.flush();

 		} catch (XMLStreamException e) {

 			throw new SAXException(e);

 		}

 	}

 	@Override

 	public void characters(char[] ch, int start, int length) throws SAXException {

 		try {

 			w.writeCharacters(ch, start, length);

 			w.flush();

 		} catch (XMLStreamException e) {

 			throw new SAXException(e);

 		}

 	}

 }