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  //
  //  ========================================================================
  //  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
  //  ------------------------------------------------------------------------
  //  All rights reserved. This program and the accompanying materials
  //  are made available under the terms of the Eclipse Public License v1.0
  //  and Apache License v2.0 which accompanies this distribution.
  //
  //      The Eclipse Public License is available at
 //      http://www.eclipse.org/legal/epl-v10.html
 //
 //      The Apache License v2.0 is available at
 //      http://www.opensource.org/licenses/apache2.0.php
 //
 //  You may elect to redistribute this code under either of these licenses.
 //  ========================================================================
 //
 
 package org.eclipse.jetty.continuation;
 
 
 /* ------------------------------------------------------------ */
ContinuationSupport. Factory class for accessing Continuation instances, which with either be native to the container (jetty >= 6), a servlet 3.0 or a faux continuation.
 
 public class ContinuationSupport
 {
     static final boolean __jetty6;
     static final boolean __servlet3;
     static final Class<?> __waitingContinuation;
     static final Constructor<? extends Continuation__newServlet3Continuation;
     static final Constructor<? extends Continuation__newJetty6Continuation;
     static
     {
         boolean servlet3Support=false;
         Constructor<? extends Continuation>s3cc=null;
         try
         {
             boolean servlet3=ServletRequest.class.getMethod("startAsync")!=null;
             if (servlet3)
             {
                 Class<? extends Continuations3c = ContinuationSupport.class.getClassLoader().loadClass("org.eclipse.jetty.continuation.Servlet3Continuation").asSubclass(Continuation.class);
                 s3cc=s3c.getConstructor(ServletRequest.class);
                 servlet3Support=true;
             }
         }
         catch (Exception e)
         {}
         finally
         {
             =servlet3Support;
             =s3cc;
         }
 
         boolean jetty6Support=false;
         Constructor<? extends Continuation>j6cc=null;
         try
         {
             Class<?> jetty6ContinuationClass = ContinuationSupport.class.getClassLoader().loadClass("org.mortbay.util.ajax.Continuation");
             boolean jetty6=jetty6ContinuationClass!=null;
             if (jetty6)
             {
                 Class<? extends Continuationj6c = ContinuationSupport.class.getClassLoader().loadClass("org.eclipse.jetty.continuation.Jetty6Continuation").asSubclass(Continuation.class);
                 j6cc=j6c.getConstructor(ServletRequest.classjetty6ContinuationClass);
                 jetty6Support=true;
             }
         }
         catch (Exception e)
         {}
         finally
         {
             =jetty6Support;
             =j6cc;
         }
 
         Class<?> waiting=null;
         try
         {
             waiting=ContinuationSupport.class.getClassLoader().loadClass("org.mortbay.util.ajax.WaitingContinuation");
         }
         catch (Exception e)
         {
         }
         finally
         {
             =waiting;
         }
     }
 
     /* ------------------------------------------------------------ */
    
Get a Continuation. The type of the Continuation returned may vary depending on the container in which the application is deployed. It may be an implementation native to the container (eg org.eclipse.jetty.server.AsyncContinuation) or one of the utility implementations provided such as an internal FauxContinuation or a real implementation like Servlet3Continuation.

Parameters:
request The request
Returns:
a Continuation instance
    public static Continuation getContinuation(ServletRequest request)
    {
        Continuation continuation = (Continuationrequest.getAttribute(.);
        if (continuation!=null)
            return continuation;
        while (request instanceof ServletRequestWrapper)
            request=((ServletRequestWrapper)request).getRequest();
        if ( )
        {
            try
            {
                continuation=.newInstance(request);
                request.setAttribute(.,continuation);
                return continuation;
            }
            catch(Exception e)
            {
                throw new RuntimeException(e);
            }
        }
        if ()
        {
            Object c=request.getAttribute("org.mortbay.jetty.ajax.Continuation");
            try
            {
                if (c==null || ==null || .isInstance(c))
                    continuation=new FauxContinuation(request);
                else
                    continuation.newInstance(request,c);
                request.setAttribute(.,continuation);
                return continuation;
            }
            catch(Exception e)
            {
                throw new RuntimeException(e);
            }
        }
        throw new IllegalStateException("!(Jetty || Servlet 3.0 || ContinuationFilter)");
    }
    /* ------------------------------------------------------------ */
    

Deprecated:
use getContinuation(javax.servlet.ServletRequest)
Parameters:
request the servlet request
response the servlet response
Returns:
the continuation
    @Deprecated
    public static Continuation getContinuation(final ServletRequest requestfinal ServletResponse response)
    {
        return getContinuation(request);
    }
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