franta-hg@11: /**
franta-hg@11:  * Alt2XML
franta-hg@11:  * Copyright © 2014 František Kučera (frantovo.cz)
franta-hg@11:  *
franta-hg@11:  * This program is free software: you can redistribute it and/or modify
franta-hg@11:  * it under the terms of the GNU General Public License as published by
franta-hg@11:  * the Free Software Foundation, either version 3 of the License, or
franta-hg@11:  * (at your option) any later version.
franta-hg@11:  *
franta-hg@11:  * This program is distributed in the hope that it will be useful,
franta-hg@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
franta-hg@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
franta-hg@11:  * GNU General Public License for more details.
franta-hg@11:  *
franta-hg@11:  * You should have received a copy of the GNU General Public License
franta-hg@11:  * along with this program. If not, see <http://www.gnu.org/licenses/>.
franta-hg@11:  */
franta-hg@3: package cz.frantovo.alt2xml.výstup;
franta-hg@2: 
franta-hg@2: import javax.xml.stream.XMLStreamException;
franta-hg@2: import javax.xml.stream.XMLStreamWriter;
franta-hg@2: import org.xml.sax.Attributes;
franta-hg@2: import org.xml.sax.SAXException;
franta-hg@2: import org.xml.sax.helpers.DefaultHandler;
franta-hg@2: 
franta-hg@2: /**
franta-hg@2:  * Slouží k převodu právě parsovaného XML zpět na XML.
franta-hg@2:  * Určen pro testování a ladění a pro použití s neobvyklými „XML“ parsery,
franta-hg@2:  * které nečtou XML ale jiný jazyk (např. JSON, INI atd.), ale používají stejné rozhraní (SAX).
franta-hg@2:  * 
franta-hg@2:  * TODO: další typy uzlů a jmenné prostory.
franta-hg@2:  * @author fiki
franta-hg@2:  */
franta-hg@2: public class EchoContentHandler extends DefaultHandler {
franta-hg@2: 
franta-hg@2: 	private XMLStreamWriter w;
franta-hg@2: 
franta-hg@2: 	/**
franta-hg@2: 	 * @param writer kam se bude vypisovat XML.
franta-hg@2: 	 */
franta-hg@2: 	public EchoContentHandler(XMLStreamWriter writer) {
franta-hg@2: 		w = writer;
franta-hg@2: 	}
franta-hg@2: 
franta-hg@2: 	@Override
franta-hg@2: 	public void startDocument() throws SAXException {
franta-hg@2: 		try {
franta-hg@2: 			w.writeStartDocument();
franta-hg@2: 		} catch (XMLStreamException e) {
franta-hg@2: 			throw new SAXException(e);
franta-hg@2: 		}
franta-hg@2: 	}
franta-hg@2: 
franta-hg@2: 	@Override
franta-hg@2: 	public void endDocument() throws SAXException {
franta-hg@2: 		try {
franta-hg@2: 			w.writeEndDocument();
franta-hg@2: 			w.close();
franta-hg@2: 		} catch (XMLStreamException e) {
franta-hg@2: 			throw new SAXException(e);
franta-hg@2: 		}
franta-hg@2: 	}
franta-hg@2: 
franta-hg@2: 	@Override
franta-hg@2: 	public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
franta-hg@2: 		try {
franta-hg@2: 			w.writeStartElement(qName);
franta-hg@2: 
franta-hg@2: 			if (attributes != null) {
franta-hg@2: 				for (int i = 0; i < attributes.getLength(); i++) {
franta-hg@2: 					w.writeAttribute(attributes.getQName(i), attributes.getValue(i));
franta-hg@2: 				}
franta-hg@2: 			}
franta-hg@2: 
franta-hg@2: 			w.flush();
franta-hg@2: 		} catch (XMLStreamException e) {
franta-hg@2: 			throw new SAXException(e);
franta-hg@2: 		}
franta-hg@2: 	}
franta-hg@2: 
franta-hg@2: 	@Override
franta-hg@2: 	public void endElement(String uri, String localName, String qName) throws SAXException {
franta-hg@2: 		try {
franta-hg@2: 			w.writeEndElement();
franta-hg@2: 			w.flush();
franta-hg@2: 		} catch (XMLStreamException e) {
franta-hg@2: 			throw new SAXException(e);
franta-hg@2: 		}
franta-hg@2: 	}
franta-hg@2: 
franta-hg@2: 	@Override
franta-hg@2: 	public void characters(char[] ch, int start, int length) throws SAXException {
franta-hg@2: 		try {
franta-hg@2: 			w.writeCharacters(ch, start, length);
franta-hg@2: 			w.flush();
franta-hg@2: 		} catch (XMLStreamException e) {
franta-hg@2: 			throw new SAXException(e);
franta-hg@2: 		}
franta-hg@2: 	}
franta-hg@2: }