DOM3 Bootstrapping

• Still no language-independent means to create a new Document object

• Does provide an implementation-independent method for Java only:

  DOMImplementation impl = DOMImplementationFactory.getDOMImplementation();

• package org.w3c.dom;
  
  public abstract class DOMImplementationFactory {
  
    // The system property to specify the DOMImplementation class name.
    private static String property = "org.w3c.dom.DOMImplementation";
  
    // The default DOMImplementation class name to use.
    private static String defaultImpl = "NO DEFAULT IMPLEMENTATION SET";
  
     public static DOMImplementation getDOMImplementation()
       throws ClassNotFoundException, InstantiationException,
              IllegalAccessException, ClassCastException {
       // Retrieve the system property
       String impl;
       try {
         impl = System.getProperty(property, defaultImpl);
       } 
       catch (SecurityException e) {
         // fallback on default implementation in case of security problem
         impl = defaultImpl;
       }
  
       // Attempt to load, instantiate and return the implementation class
       return (DOMImplementation) Class.forName(impl).newInstance();
    }
     
  }