<extension
         name="sasa"
         point="org.eclipse.ui.perspectives">
      <perspective
            class="mypkg.Perspective"
            id="mypkg.perspective.p1"
            name="P1">
      </perspective>
      <perspective
            class="mypkg.Perspective"
            id="mypkg.perspective.p2"
            name="P2">
      </perspective>
   </extension>

class ApplicationWorkbenchAdvisor extends WorkbenchAdvisor
{  
  public ApplicationWorkbenchAdvisor()
 {
  addPerspectives();
 }
  
private void addPerspectives()
  {  
    StringBuffer sb = new StringBuffer();
    sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
    sb.append("<plugin>");
    sb.append(" <extension ");
    sb.append("   name=\"sasa\"");
    sb.append("   point=\"org.eclipse.ui.perspectives\">");
    sb.append("   <perspective ");
    sb.append("     class=\"mypkg.Perspective\"");
    sb.append("     id=\"mypkg.perspective.P3\"");
    sb.append("     name=\"P3\">");
    sb.append("   </perspective>");
    sb.append(" </extension>");
    sb.append("</plugin>");
    System.out.println(sb.toString());
    try
    {
      byte[] bytes = sb.toString().getBytes("UTF-8");
      InputStream is = new ByteArrayInputStream(bytes);
      IExtensionRegistry registry = RegistryFactory.getRegistry();
      Object key = ((ExtensionRegistry) registry).getTemporaryUserToken();
      Bundle bunlde = Activator.getDefault().getBundle();
      IContributor contributor = ContributorFactoryOSGi.createContributor(bunlde);      
      try
      {
        if(!registry.addContribution(is, contributor ,false, null, null, key))
        {
          System.err.println("### Error"); 
        }
        else
        {
          System.out.println("#### addeddd");
        }
      }
      catch (IllegalArgumentException e) 
      {
        e.printStackTrace();
      }
    }
    catch (UnsupportedEncodingException e)
    {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }