Hi guys,


I have the code for parsing of xml complete tags but i need to parse also the empty tags.


The code which i have is :

import java.lang.reflect.*;
import java.io.*;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import java.util.*;

public abstract class XMLParser extends DefaultHandler implements PercLogger
{
public String value = "";
public Vector tagStack = new Vector(); // we'll use this like a stack
// to accomodate nested tags
public Hashtable tagStarters = new Hashtable();
public Hashtable tagEnders = new Hashtable();
public PercList tagTriggers = new PercList();
public String parsestring = "";
public PercBasicLogger logger = null;
public Object currentObject = null;

// This method is only necessary for testing. You can save the output
// of the CORBA payload string into a file and rerun your parser until
// you get it write using this method, then at run time use the
// method that takes a String
public XMLParser(File inputfile, PercBasicLogger l) throws PercException {
StringBuffer input = new StringBuffer();
try {
FileInputStream io = new FileInputStream(inputfile);
InputStreamReader reader = new InputStreamReader(io);
char n[] = new char[io.available()];
reader.read(n);
input.append(n);
reader.close();
parsestring = input.toString();
logger = l;
setupTags();
} catch (IOException ex) {
throw new PercException("Can't read file: " + inputfile);
}

}

public XMLParser(String inputstream, PercBasicLogger l) throws PercException{
parsestring = inputstream.replace('&', ' ');
logger = l;
setupTags();
}

public void parse() throws PercException {
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating(true);
ByteArrayInputStream input = new ByteArrayInputStream(parsestring.getBytes());

try {
SAXParser saxParser = factory.newSAXParser();
saxParser.parse(input, this);
} catch (Throwable t) {
t.printStackTrace();
throw new PercException(t.getMessage());
}
}

// any tag setup
public abstract void setupTags();


public void startDocument() throws SAXException {
debug("start document");
}

public void endDocument() throws SAXException {
debug("end document");
}

public void characters(char buf[], int offset, int len) throws SAXException {
value = new String(buf, offset, len);
}

public void push(String tag) {
tagStack.add(tag);
}

public void pop() {
if (tagStack.size() > 0)
tagStack.remove(tagStack.lastElement());
}

public String currentTag() {
if (tagStack.size() == 0) return "";
return (String)tagStack.lastElement();
}

public String completeTag() {
if (tagStack.size() == 0) return "";
StringBuffer buf = new StringBuffer();
buf.append((String)tagStack.get(0));
for (int i = 1; i < tagStack.size(); i++)
buf.append("." + (String)tagStack.get(i));
return buf.toString();
}

public void startElement(String namespaceURI, String sName, String qName, Attributes attrs) throws SAXException {
push(qName);
try {
Method start = (Method)tagStarters.get(completeTag());
if (start != null) {
Object params[] = {};
start.invoke(this, params);
}
} catch (Exception ex) {
error(ex);
}
}

public void endElement(String namespaceURI, String sName, String qName) throws SAXException {
try {

// we run the setter for the appropriate tag on the current object
String key = completeTag();
XMLTrigger trigger = (XMLTrigger)tagTriggers.getValue(key);

if (trigger != null) {
Method setter = trigger.getTheMethod();
if (setter != null) {
// We can check the setter type here and cast
// value into the appropriate object/scalar type
// right now we just pass it as its default type, String
Object params[] = {value};
debug("Setting Field " + completeTag() + "=" + value);

setter.invoke(currentObject, params);
// clear value after setting
value = "";
} else {
debug("Setter Not Found: " + completeTag() + "=" + value);
}
} else {
debug("Trigger Not Found: " + completeTag() + "=" + value);
}
Method end = (Method)tagEnders.get(completeTag());
if (end != null) {
Object params[] = {};
end.invoke(this, params);
}

pop();

} catch (Exception ex) {
error("Failed on Object " + currentObject.getClass().getName() + ": " + completeTag() + ": " + ex);
}
}

public void debug(Object message) {
logger.debug(this.getClass(), message);
}
public void error(Object message) {
logger.error(this.getClass(), message);
}
public void fatal(Object message) {
logger.fatal(this.getClass(), message);
}
public void info(Object message) {
logger.info(this.getClass(), message);
}
public void warn(Object message) {
logger.warn(this.getClass(), message);
}
}


Please help me how can I add the code for doing the parsing of XML Empty Tags.

Thanks in advance...

Riju