Custom SAX Parser 2003-05-13 - By Gordon Ross
Hi,
I'm trying to use a custom SAX parser with Xalan. I started by using
the code below to use the standard SAX parser, and this works great:
javax.xml.transform.TransformerFactory tFactory =
javax.xml.transform.TransformerFactory.newInstance();
Templates template = tFactory.newTemplates(new
StreamSource("servers.xslt"));
javax.xml.transform.sax.TransformerHandler saxTransformHandler =
((SAXTransformerFactory)tFactory).newTransformerHandler(template);
saxTransformHandler.setResult(new StreamResult(System.out));
XMLReader reader =
org.xml.sax.helpers.XMLReaderFactory.createXMLReader();
reader.setContentHandler(saxTransformHandler);
reader.parse("severlist.xml");
I then wanted to use a custom SAX parser (which actually generates SAX
events avoiding writting XML and then parsing that XML)
I set this up using this:
javax.xml.transform.TransformerFactory tFactory =
javax.xml.transform.TransformerFactory.newInstance();
Templates template = tFactory.newTemplates(new
StreamSource("servers.xslt"));
javax.xml.transform.sax.TransformerHandler saxTransformHandler =
((SAXTransformerFactory)tFactory).newTransformerHandler(template);
saxTransformHandler.setResult(new StreamResult(System.out));
fakeXML(saxTransformHandler);
where fakeXML fires SAX events. A cut-down version of it is:
public static void fakeXML(ContentHandler ch) throws SAXException
{
char charray[];
String myString;
ch.startDocument();
ch.startElement("", "", "serverlist", EMPTY_ATTR);
ch.startElement("","","serverTypes",EMPTY_ATTR);
charray = (new String("Master")).toCharArray();
myString = "Master";
ch.characters(myString.toCharArray(),0, myString.length());
ch.endElement("","","serverTypes");
ch.startElement("","","server",EMPTY_ATTR);
ch.startElement("","","name",EMPTY_ATTR);
charray = (new String("ISIS32")).toCharArray();
ch.characters(charray,0,charray.length);
ch.endElement("","","serverTypes");
ch.startElement("","","description",EMPTY_ATTR);
charray = (new String("Some Junk")).toCharArray();
ch.characters(charray,0, charray.length);
ch.endElement("","","description");
ch.startElement("","","state",EMPTY_ATTR);
charray = (new String("Sleeping")).toCharArray();
ch.characters(charray,0,charray.length);
ch.endElement("","","description");
ch.startElement("","","info",EMPTY_ATTR);
charray = (new String("home/vol2/test")).toCharArray();
ch.characters(charray,0,charray.length);
ch.endElement("","","info");
ch.endElement("","","server");
ch.endElement("","","serverlist");
ch.endDocument();
}
This code "generates" the XML that worked with the first example.
However, when I try this, the output from Xalan doesn't have anything
from my generated SAX/XML.
Can anyone point me in the right direction ?
Thanks,
GTG
Gordon Ross,
Network Manager/Rheolwr Rhydwaith
Countryside Council for Wales/Cyngor Cefn Gwlad Cymru
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