SAX won't necessarily be /faster/ -- it could be a lot slower. It
depends on what you're doing.
Are you page-thrashing? If so, than SAX is definitely a good idea.
--
John W. Kennedy
"...if you had to fall in love with someone who was evil, I can see why
it was her."
-- "Alias"
* TagZilla 0.066 *
http://tagzilla.mozdev.org- Hide quoted text -
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what "...if you had to fall in love with someone who was evil, I can
see why
it was her." means?
I don't know how DOM works when it parsing a XML, I use DOM that is
because the XPath can quciky location some particular elements. I
think if the SAX only reports events but not store the whole structure
of XML like DOM does, It must be more efficient. What does "page-
thrashing" means ?
I paste the source of the code
FYI
public Set parsing(String filename) throws Exception{
Set subset = new LinkedHashSet();
File f = new File(filename);
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(f);
Element root = doc.getDocumentElement();
XPathFactory xpfactory = XPathFactory.newInstance();
XPath path = xpfactory.newXPath();
NodeList recoredlist = (NodeList)path.evaluate("/journal/record",
doc, XPathConstants.NODESET);
// System.out.println("frameIdlist.getLength()= " +
recoredlist.getLength());
//enumerate all record in a log
for(int i = 0; i < recoredlist.getLength(); i ++){
// System.out.println("recoredlist = " + recoredlist.item(i));
Node record = recoredlist.item(i);
Element recordelement = (Element)record;
//System.out.println(recordelement.getTagName());
//get operat type
String BEtype = (String)path.evaluate("header/header_generic/domain/
@value", recordelement);
// System.out.println("operation type = " + BEtype);
if(!BEtype.equals("SHLR::Subscription"))
continue;
SubInfo subscriber = new SubInfo();
NodeList framelist = (NodeList)path.evaluate("body/frame",
recordelement, XPathConstants.NODESET);
// System.out.println("framelist = " + framelist.getLength());
//enumerate frame list in a record
for(int j = 0; j < framelist.getLength(); j++){
// System.out.println("frame = " + framelist.item(j));
NodeList attriblist = (NodeList)path.evaluate("attribute/
attribute_value/string/@value", framelist.item(j),
XPathConstants.NODESET);
for(int k = 0; k < attriblist.getLength(); k++){
//System.out.println(attriblist.item(k));
//System.out.println(attriblist.item(k).getClass());
Node attribute = attriblist.item(k);
String value = attribute.getNodeValue();
//String value = att.getAttribute("Value");
// System.out.println("Value = " + value);
if(value.equals("create")){
subscriber.setModifier("create");
}else{
if(value.equals("modify")){
subscriber.setModifier("modify");
}else{
if(value.equals("delete")){
subscriber.setModifier("delete");
}else{
if(value.trim().matches("dirNumberId.*")){
//System.out.println("dirNumberId = " +
value);
String dirnumber =
value.substring(value.indexOf("dirNumberId=") + 12,
value.indexOf(",sHLRSubsOrganizationId"));
String ndc =
value.substring(value.indexOf("nDCId=") + 6,
value.indexOf(",managedElementId=SHLR"));
// System.out.println("dirnumber=" +
dirnumber + ndc);
subscriber.setNDCId(ndc);
subscriber.setdirNumberId(dirnumber);
}else{
if(value.equals("calledList")){
Node calledattr = attriblist.item(k + 1);
String calledvalue =
calledattr.getNodeValue();
// System.out.println("calledList = " +
calledvalue);
if(calledvalue.equals("NULL"))
subscriber.removeCalledList();
else
subscriber.addCalledList(calledvalue);
}else{
if(value.equals("callingList")){
Node callingattr = attriblist.item(k + 1);
String callingvalue =
callingattr.getNodeValue();
// System.out.println("callingList = " +
callingvalue);
if(callingvalue.equals("NULL"))
subscriber.removeCallingList();
else
subscriber.addCallingList(callingvalue);
}else{
if(value.equals("lRNumberId")){
Node lrnattr = attriblist.item(k + 1);
String lrnvalue = lrnattr.getNodeValue();
subscriber.setlrnNumberId(lrnvalue);
}
}
}
}
}
}
}
}
}
if(subscriber != null)
subset.add(subscriber);
}
return subset;
}
