Java Tutorial/XML/StreamFilter

implements EventFilter, StreamFilter

   <source lang="java">

import java.io.File; import java.io.FileInputStream; import javax.xml.stream.EventFilter; import javax.xml.stream.StreamFilter; import javax.xml.stream.XMLEventReader; import javax.xml.stream.XMLInputFactory; import javax.xml.stream.XMLStreamConstants; import javax.xml.stream.XMLStreamException; import javax.xml.stream.XMLStreamReader; import javax.xml.stream.events.XMLEvent; public class EventFilterExample {

 public static void main(String[] args) throws Exception {
   File file = new File("text.xml");
   XMLInputFactory inputFactory = XMLInputFactory.newInstance();
   XMLEventReader reader = inputFactory.createXMLEventReader(new FileInputStream(file));
   System.out.println("Unfiltered Count = " + countEvents(reader));
   reader = inputFactory.createXMLEventReader(new FileInputStream(file));
   EventFilter filter = new ElementOnlyFilter();
   reader = inputFactory.createFilteredReader(reader, filter);
   System.out.println("Filtered Count = " + countEvents(reader));
 }
 private static int countEvents(XMLEventReader reader) throws XMLStreamException {
   int counter = 0;
   while (reader.hasNext()) {
     reader.next();
     counter++;
   }
   return counter;
 }

} class ElementOnlyFilter implements EventFilter, StreamFilter {

 public boolean accept(XMLEvent event) {
   return accept(event.getEventType());
 }
 public boolean accept(XMLStreamReader reader) {
   return accept(reader.getEventType());
 }
 private boolean accept(int eventType) {
   return eventType == XMLStreamConstants.START_ELEMENT
       || eventType == XMLStreamConstants.END_ELEMENT;
 }

}</source>