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package cz.frantovo.alt2xml;
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import javax.xml.stream.XMLStreamException;
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import javax.xml.stream.XMLStreamWriter;
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import org.xml.sax.Attributes;
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import org.xml.sax.SAXException;
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import org.xml.sax.helpers.DefaultHandler;
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/**
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* Slouží k převodu právě parsovaného XML zpět na XML.
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* Určen pro testování a ladění a pro použití s neobvyklými „XML“ parsery,
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* které nečtou XML ale jiný jazyk (např. JSON, INI atd.), ale používají stejné rozhraní (SAX).
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*
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* TODO: další typy uzlů a jmenné prostory.
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* @author fiki
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*/
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public class EchoContentHandler extends DefaultHandler {
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private XMLStreamWriter w;
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/**
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* @param writer kam se bude vypisovat XML.
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*/
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public EchoContentHandler(XMLStreamWriter writer) {
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w = writer;
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}
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@Override
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public void startDocument() throws SAXException {
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try {
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w.writeStartDocument();
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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}
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@Override
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public void endDocument() throws SAXException {
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try {
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w.writeEndDocument();
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w.close();
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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}
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@Override
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public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
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try {
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w.writeStartElement(qName);
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if (attributes != null) {
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for (int i = 0; i < attributes.getLength(); i++) {
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w.writeAttribute(attributes.getQName(i), attributes.getValue(i));
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}
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}
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w.flush();
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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}
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@Override
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public void endElement(String uri, String localName, String qName) throws SAXException {
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try {
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w.writeEndElement();
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w.flush();
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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}
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@Override
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public void characters(char[] ch, int start, int length) throws SAXException {
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try {
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w.writeCharacters(ch, start, length);
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w.flush();
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} catch (XMLStreamException e) {
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throw new SAXException(e);
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}
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}
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}
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