protected PortletRequestDataBinder createBinder(PortletRequest request,
    Object target,
    String objectName) throws Exception 
{
		return new PortletRequestDataBinder(target, objectName);
}

Template method for creating a new PortletRequestDataBinder instance.

The default implementation creates a standard PortletRequestDataBinder. This can be overridden for custom PortletRequestDataBinder subclasses.

 protected ModelAndView doHandle(PortletRequest request,
    PortletResponse response,
    Object handler) throws Exception 
{
		ExtendedModelMap implicitModel = null;
		if (request instanceof RenderRequest && response instanceof RenderResponse) {
			RenderRequest renderRequest = (RenderRequest) request;
			RenderResponse renderResponse = (RenderResponse) response;
			// Detect implicit model from associated action phase.
			if (renderRequest.getParameter(IMPLICIT_MODEL_ATTRIBUTE) != null) {
				PortletSession session = request.getPortletSession(false);
				if (session != null) {
					implicitModel = (ExtendedModelMap) session.getAttribute(IMPLICIT_MODEL_ATTRIBUTE);
				}
			}
			if (handler.getClass().getAnnotation(SessionAttributes.class) != null) {
				// Always prevent caching in case of session attribute management.
				checkAndPrepare(renderRequest, renderResponse, 0);
			}
			else {
				// Uses configured default cacheSeconds setting.
				checkAndPrepare(renderRequest, renderResponse);
			}
		}
		if (implicitModel == null) {
			implicitModel = new ExtendedModelMap();
		}
		// Execute invokeHandlerMethod in synchronized block if required.
		if (this.synchronizeOnSession) {
			PortletSession session = request.getPortletSession(false);
			if (session != null) {
				Object mutex = PortletUtils.getSessionMutex(session);
				synchronized (mutex) {
					return invokeHandlerMethod(request, response, handler, implicitModel);
				}
			}
		}
		return invokeHandlerMethod(request, response, handler, implicitModel);
}

 public  void handleAction(ActionRequest request,
    ActionResponse response,
    Object handler) throws Exception 
{
		Object returnValue = doHandle(request, response, handler);
		if (returnValue != null) {
			throw new IllegalStateException("Invalid action method return value: " + returnValue);
		}
}

 public ModelAndView handleRender(RenderRequest request,
    RenderResponse response,
    Object handler) throws Exception 
{
		checkAndPrepare(request, response);
		return doHandle(request, response, handler);
}

 public  void setCustomArgumentResolver(WebArgumentResolver argumentResolver) 
{
		this.customArgumentResolvers = new WebArgumentResolver[] {argumentResolver};
}

Set a custom ArgumentResolvers to use for special method parameter types. Such a custom ArgumentResolver will kick in first, having a chance to resolve an argument value before the standard argument handling kicks in.

 public  void setCustomArgumentResolvers(WebArgumentResolver[] argumentResolvers) 
{
		this.customArgumentResolvers = argumentResolvers;
}

Set one or more custom ArgumentResolvers to use for special method parameter types. Any such custom ArgumentResolver will kick in first, having a chance to resolve an argument value before the standard argument handling kicks in.

 public  void setParameterNameDiscoverer(ParameterNameDiscoverer parameterNameDiscoverer) 
{
		this.parameterNameDiscoverer = parameterNameDiscoverer;
}

Set the ParameterNameDiscoverer to use for resolving method parameter names if needed (e.g. for default attribute names).

Default is a org.springframework.core.LocalVariableTableParameterNameDiscoverer .

 public  void setSessionAttributeStore(SessionAttributeStore sessionAttributeStore) 
{
		Assert.notNull(sessionAttributeStore, "SessionAttributeStore must not be null");
		this.sessionAttributeStore = sessionAttributeStore;
}

Specify the strategy to store session attributes with.

Default is org.springframework.web.bind.support.DefaultSessionAttributeStore , storing session attributes in the PortletSession, using the same attribute name as in the model.

 public  void setSynchronizeOnSession(boolean synchronizeOnSession) 
{
		this.synchronizeOnSession = synchronizeOnSession;
}

Set if controller execution should be synchronized on the session, to serialize parallel invocations from the same client.

More specifically, the execution of each handler method will get synchronized if this flag is "true". The best available session mutex will be used for the synchronization; ideally, this will be a mutex exposed by HttpSessionMutexListener.

The session mutex is guaranteed to be the same object during the entire lifetime of the session, available under the key defined by the SESSION_MUTEX_ATTRIBUTE constant. It serves as a safe reference to synchronize on for locking on the current session.

In many cases, the PortletSession reference itself is a safe mutex as well, since it will always be the same object reference for the same active logical session. However, this is not guaranteed across different servlet containers; the only 100% safe way is a session mutex.

 public  void setWebBindingInitializer(WebBindingInitializer webBindingInitializer) 
{
	               	 
		this.webBindingInitializer = webBindingInitializer;
}

Specify a WebBindingInitializer which will apply pre-configured configuration to every DataBinder that this controller uses.

 public boolean supports(Object handler) 
{
		return getMethodResolver(handler).hasHandlerMethods();
}