Mega Code Archive
A Program to Display the Input from a SAX Parser
<![CDATA[
/*
Code revised from
Java, XML, and JAXP by Arthur Griffith John Wiley & Sons 2002
*/
import java.io.IOException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
class MyContentHandler implements ContentHandler {
private Locator locator;
public void setDocumentLocator(Locator locator) {
this.locator = locator;
System.out.println("-" + locator.getLineNumber() + "---Document ID: " + locator.getSystemId());
}
public void startDocument() {
System.out.println("-" + locator.getLineNumber() + "---Document parse started");
}
public void endDocument() {
System.out.println("-" + locator.getLineNumber() + "---Document parse ended");
}
public void startPrefixMapping(String prefix, String uri) {
System.out.println("-" + locator.getLineNumber() + "---Namespace scope begins");
System.out.println(" " + prefix + "=\"" + uri + "\"");
}
public void endPrefixMapping(String prefix) {
System.out.println("-" + locator.getLineNumber() + "---Namespace scope ends");
System.out.println(" " + prefix);
}
public void startElement(String namespaceURI, String localName, String qName, Attributes atts) {
System.out.println("-" + locator.getLineNumber() + "---Opening tag of an element");
System.out.println(" Namespace: " + namespaceURI);
System.out.println(" Local name: " + localName);
System.out.println(" Qualified name: " + qName);
for (int i = 0; i < atts.getLength(); i++) {
System.out.println(" Attribute: " + atts.getQName(i) + "=\"" + atts.getValue(i) + "\"");
}
}
public void endElement(String namespaceURI, String localName, String qName) {
System.out.println("-" + locator.getLineNumber() + "---Closing tag of an element");
System.out.println(" Namespace: " + namespaceURI);
System.out.println(" Local name: " + localName);
System.out.println(" Qualified name: " + qName);
}
public void characters(char[] ch, int start, int length) {
System.out.println("-" + locator.getLineNumber() + "---Character data");
showCharacters(ch, start, length);
}
public void ignorableWhitespace(char[] ch, int start, int length) {
System.out.println("-" + locator.getLineNumber() + "---Whitespace");
showCharacters(ch, start, length);
}
public void processingInstruction(String target, String data) {
System.out.println("-" + locator.getLineNumber() + "---Processing Instruction");
System.out.println(" Target: " + target);
System.out.println(" Data: " + data);
}
public void skippedEntity(String name) {
System.out.println("-" + locator.getLineNumber() + "---Skipped Entity");
System.out.println(" Name: " + name);
}
public void showCharacters(char[] ch, int start, int length) {
System.out.print(" \"");
for (int i = start; i < start + length; i++)
switch (ch[i]) {
case '\n':
System.out.print("\\n");
break;
case '\r':
System.out.print("\\r");
break;
case '\t':
System.out.print("\\t");
break;
default:
System.out.print(ch[i]);
break;
}
System.out.println("\"");
}
}
class MyErrorHandler implements ErrorHandler {
public void warning(SAXParseException e) throws SAXException {
show("Warning", e);
throw (e);
}
public void error(SAXParseException e) throws SAXException {
show("Error", e);
throw (e);
}
public void fatalError(SAXParseException e) throws SAXException {
show("Fatal Error", e);
throw (e);
}
private void show(String type, SAXParseException e) {
System.out.println(type + ": " + e.getMessage());
System.out.println("Line " + e.getLineNumber() + " Column " + e.getColumnNumber());
System.out.println("System ID: " + e.getSystemId());
}
}
public class SAXDump {
static public void main(String[] arg) {
SAXParserFactory spf = SAXParserFactory.newInstance();
XMLReader reader = null;
try {
SAXParser parser = spf.newSAXParser();
reader = parser.getXMLReader();
} catch (Exception e) {
System.err.println(e);
System.exit(1);
}
reader.setErrorHandler(new MyErrorHandler());
reader.setContentHandler(new MyContentHandler());
try {
InputSource is = new InputSource("test.xml");
reader.parse(is);
} catch (SAXException e) {
System.exit(1);
} catch (IOException e) {
System.err.println(e);
System.exit(1);
}
}
}
//File: test.xml
<roots>
<a>
<b>text</b>
</a>
</roots>
-1---Document ID: file:///C:/Java_Dev/eclipse31/Eclipse/test.xml
-1---Document parse started
-1---Opening tag of an element
Namespace:
Local name:
Qualified name: roots
-2---Character data
"\n "
-2---Opening tag of an element
Namespace:
Local name:
Qualified name: a
-3---Character data
"\n "
-3---Opening tag of an element
Namespace:
Local name:
Qualified name: b
-3---Character data
"text"
-3---Closing tag of an element
Namespace:
Local name:
Qualified name: b
-4---Character data
"\n "
-4---Closing tag of an element
Namespace:
Local name:
Qualified name: a
-5---Character data
"\n"
-5---Closing tag of an element
Namespace:
Local name:
Qualified name: roots
-6---Document parse ended
]]>