Re: Best Practices for Writing XML
Arne Vajh?j wrote:
On 03-03-2010 19:59, markspace wrote:
Tom Anderson wrote:
You reckon? I'm not sure how much use any of the parser APIs are for
writing XML. Parsing is traditionally very much about reading. Which
is the opposite of writing.
As far as I know, all of these parsers can also be used for writing,
except for XPath.
A parser is by definition reading.
But:
W3C DOM : reading + in recent versions writing
SAX : reading
JAXB : reading + writing
StAX : reading + writing
JDOM : reading + writing
So I would say 3.5 out of 5.
XPath is not a parser but a query tool to be used
with W3C DOM or JDOM.
XSLT can be used turn SAX events into an XML-formatted stream, though I've
never seen that used as a way of composing XML. Hmm.
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.XMLFilterImpl;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamResult;
import java.io.IOException;
public class MakeXML
{
public static void main(String[] args) throws Exception
{
Transformer xf = TransformerFactory.newInstance().newTransformer();
xf.transform(
new SAXSource(new XMLEventGenerator(), null),
new StreamResult(System.out));
}
public static class XMLEventGenerator extends XMLFilterImpl
{
public void parse(String systemId) throws SAXException, IOException
{
generateEvents();
}
public void parse(InputSource input) throws SAXException,
IOException
{
generateEvents();
}
private void generateEvents() throws SAXException
{
ContentHandler ch = getContentHandler();
ch.startDocument();
ch.startElement(null, "start", "start", null);
ch.endElement(null, "start", "start");
ch.endDocument();
}
}
}
outputs :
<?xml version="1.0" encoding="UTF-8"?><start/>