Java by API/javax.xml.stream/XMLInputFactory

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XMLInputFactory: createFilteredReader(XMLEventReader reader, EventFilter filter)

  
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.XMLStreamReader;
import javax.xml.stream.events.XMLEvent;
public class Main {
  public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    XMLEventReader reader = inputFactory.createXMLEventReader(new FileInputStream(new File("a.xml")));
    reader = inputFactory.createFilteredReader(reader, new EventFilter() {
      public boolean accept(XMLEvent event) {
        return false;
      }
    });
    reader = inputFactory.createFilteredReader(reader, new ElementOnlyFilter());
    System.out.println(reader.hasNext());
    System.out.println(reader.next());
  }
}
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;
  }
}





XMLInputFactory: createFilteredReader(XMLStreamReader reader, StreamFilter filter)

  
import java.io.File;
import java.io.FileInputStream;
import javax.xml.stream.EventFilter;
import javax.xml.stream.StreamFilter;
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 Main {
  public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(new File("test.xml")));
    System.out.println(countEvents(reader));
    reader = inputFactory.createXMLStreamReader(new FileInputStream(new File("test.xml")));
    StreamFilter filter = new ElementOnlyFilter();
    reader = inputFactory.createFilteredReader(reader, filter);
    System.out.println(countEvents(reader));
  }
  private static int countEvents(XMLStreamReader reader) throws XMLStreamException {
    int counter = 1;
    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;
  }
}





XMLInputFactory: createXMLEventReader(InputStream stream)

  
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.XMLStreamReader;
import javax.xml.stream.events.XMLEvent;
public class Main {
  public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    XMLEventReader reader = inputFactory.createXMLEventReader(new FileInputStream(new File("a.xml")));
    reader = inputFactory.createFilteredReader(reader, new EventFilter() {
      public boolean accept(XMLEvent event) {
        return false;
      }
    });
    reader = inputFactory.createFilteredReader(reader, new ElementOnlyFilter());
    System.out.println(reader.hasNext());
    System.out.println(reader.next());
  }
}
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;
  }
}





XMLInputFactory: createXMLEventReader(Reader reader)

  

import java.io.FileReader;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.events.XMLEvent;
public class Main {
  public static void main(String args[]) throws Exception {
    XMLInputFactory xmlif = XMLInputFactory.newInstance();
    XMLEventReader xmler = xmlif.createXMLEventReader(new FileReader("yourFile.xml"));
    XMLEvent event;
    while (xmler.hasNext()) {
      event = xmler.nextEvent();
      if (event.isStartElement()) {
        System.out.println(event.asStartElement().getName());
      } else if (event.isCharacters()) {
        System.out.println(event.asCharacters().getData());
      }
    }
  }
}





XMLInputFactory: createXMLStreamReader(InputStream stream)

  
import java.io.File;
import java.io.FileInputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
public class Main {
  public static void main(String[] args) throws Exception {
    File file = new File("test.xml");
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream(file));
    while (reader.getEventType() == 6)
      reader.next();
    int eventTypeID = reader.next();
    System.out.println("Hello " + reader.getText());
  }
}





XMLInputFactory.IS_COALESCING

  

import java.io.FileInputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
public class Main {
  public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    inputFactory.setProperty(XMLInputFactory.IS_COALESCING, Boolean.TRUE);
    inputFactory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, Boolean.TRUE);
    XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream("e.xml"));
    while (reader.hasNext()) {
      int event = reader.next();
      if (event == XMLStreamConstants.CHARACTERS)
        System.out.println(reader.getText());
      else if (event == XMLStreamConstants.ENTITY_REFERENCE) {
        System.out.println("en: " + reader.getLocalName());
        System.out.println("er: " + reader.getText());
      }
    }
    inputFactory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, Boolean.FALSE);
    reader = inputFactory.createXMLStreamReader(new FileInputStream("e.xml"));
    while (reader.hasNext()) {
      int event = reader.next();
      if (event == XMLStreamConstants.CHARACTERS)
        System.out.println(reader.getText());
      else if (event == XMLStreamConstants.ENTITY_REFERENCE) {
        System.out.println("en: " + reader.getLocalName());
        System.out.println("er: " + reader.getText());
      }
    }
  }
}





XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES

  

import java.io.FileInputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
public class Main {
  public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    inputFactory.setProperty(XMLInputFactory.IS_COALESCING, Boolean.TRUE);
    inputFactory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, Boolean.TRUE);
    XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream("e.xml"));
    while (reader.hasNext()) {
      int event = reader.next();
      if (event == XMLStreamConstants.CHARACTERS)
        System.out.println(reader.getText());
      else if (event == XMLStreamConstants.ENTITY_REFERENCE) {
        System.out.println("en: " + reader.getLocalName());
        System.out.println("er: " + reader.getText());
      }
    }
    inputFactory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, Boolean.FALSE);
    reader = inputFactory.createXMLStreamReader(new FileInputStream("e.xml"));
    while (reader.hasNext()) {
      int event = reader.next();
      if (event == XMLStreamConstants.CHARACTERS)
        System.out.println(reader.getText());
      else if (event == XMLStreamConstants.ENTITY_REFERENCE) {
        System.out.println("en: " + reader.getLocalName());
        System.out.println("er: " + reader.getText());
      }
    }
  }
}





XMLInputFactory.setProperty(String name, Object value)

  

import java.io.FileInputStream;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
public class Main {
  public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    inputFactory.setProperty(XMLInputFactory.IS_COALESCING, Boolean.TRUE);
    inputFactory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, Boolean.TRUE);
    XMLStreamReader reader = inputFactory.createXMLStreamReader(new FileInputStream("e.xml"));
    while (reader.hasNext()) {
      int event = reader.next();
      if (event == XMLStreamConstants.CHARACTERS)
        System.out.println(reader.getText());
      else if (event == XMLStreamConstants.ENTITY_REFERENCE) {
        System.out.println("en: " + reader.getLocalName());
        System.out.println("er: " + reader.getText());
      }
    }
    inputFactory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, Boolean.FALSE);
    reader = inputFactory.createXMLStreamReader(new FileInputStream("e.xml"));
    while (reader.hasNext()) {
      int event = reader.next();
      if (event == XMLStreamConstants.CHARACTERS)
        System.out.println(reader.getText());
      else if (event == XMLStreamConstants.ENTITY_REFERENCE) {
        System.out.println("en: " + reader.getLocalName());
        System.out.println("er: " + reader.getText());
      }
    }
  }
}





XMLInputFactory: setXMLResolver(XMLResolver resolver)

  
import java.io.FileInputStream;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLResolver;
import javax.xml.stream.XMLStreamException;
public class Main {
  public static void main(String[] args) throws Exception {
    XMLInputFactory inputFactory = XMLInputFactory.newInstance();
    inputFactory.setXMLResolver(new XMLResolver() {
      public Object resolveEntity(String publicID, String systemID, String baseURI, String namespace)
          throws XMLStreamException {
        System.out.println(systemID);
        return null;
      }
    });
    XMLEventReader reader = inputFactory.createXMLEventReader(new FileInputStream(
        "dtd.xml"));
    XMLEventWriter writer = XMLOutputFactory.newInstance().createXMLEventWriter(System.out);
    writer.add(reader);
    writer.flush();
  }
}


Источник — «http://jexp.ru/index.php?title=Java_by_API/javax.xml.stream/XMLInputFactory&oldid=970»