javax.faces.application
Class ViewHandlerWrapper

java.lang.Object
  extended by javax.faces.application.ViewHandler
      extended by javax.faces.application.ViewHandlerWrapper
All Implemented Interfaces:
FacesWrapper<ViewHandler>

public abstract class ViewHandlerWrapper
extends ViewHandler
implements FacesWrapper<ViewHandler>

see Javadoc of JSF Specification

Author:
Stan Silvert

Field Summary
 
Fields inherited from class javax.faces.application.ViewHandler
CHARACTER_ENCODING_KEY, DEFAULT_FACELETS_SUFFIX, DEFAULT_SUFFIX, DEFAULT_SUFFIX_PARAM_NAME, FACELETS_SUFFIX_PARAM_NAME, FACELETS_VIEW_MAPPINGS_PARAM_NAME
 
Constructor Summary
ViewHandlerWrapper()
           
 
Method Summary
 String calculateCharacterEncoding(FacesContext context)
           
 Locale calculateLocale(FacesContext context)
          Return the Locale object that should be used when rendering this view to the current user.
 String calculateRenderKitId(FacesContext context)
          Return the id of an available render-kit that should be used to map the JSF components into user presentation.
 UIViewRoot createView(FacesContext context, String viewId)
          Build a root node for a component tree.
 String deriveLogicalViewId(FacesContext context, String rawViewId)
           
 String deriveViewId(FacesContext context, String input)
           
 String getActionURL(FacesContext context, String viewId)
          Returns a URL, suitable for encoding and rendering, that (if activated) will cause the JSF request processing lifecycle for the specified viewId to be executed
 String getBookmarkableURL(FacesContext context, String viewId, Map<String,List<String>> parameters, boolean includeViewParams)
          Return a JSF action URL derived from the viewId argument that is suitable to be used as the target of a link in a JSF response.
 String getRedirectURL(FacesContext context, String viewId, Map<String,List<String>> parameters, boolean includeViewParams)
          Return a JSF action URL derived from the viewId argument that is suitable to be used by the NavigationHandler to issue a redirect request to the URL using a NonFaces request.
 String getResourceURL(FacesContext context, String path)
          Returns a URL, suitable for encoding and rendering, that (if activated) will retrieve the specified web application resource.
 ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context, String viewId)
          Return the ViewDeclarationLanguage instance used for this ViewHandler instance.
abstract  ViewHandler getWrapped()
          A class that implements this interface uses this method to return an instance of the class being wrapped.
 void initView(FacesContext context)
          Initialize the view for the request processing lifecycle.
 void renderView(FacesContext context, UIViewRoot viewToRender)
          Perform whatever actions are required to render the response view to the response object associated with the current FacesContext.
 UIViewRoot restoreView(FacesContext context, String viewId)
          Perform whatever actions are required to restore the view associated with the specified FacesContext and viewId.
 void writeState(FacesContext context)
          Take any appropriate action to either immediately write out the current state information (by calling StateManager.writeState(javax.faces.context.FacesContext, java.lang.Object), or noting where state information should later be written.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ViewHandlerWrapper

public ViewHandlerWrapper()
Method Detail

calculateCharacterEncoding

public String calculateCharacterEncoding(FacesContext context)
Overrides:
calculateCharacterEncoding in class ViewHandler

initView

public void initView(FacesContext context)
              throws FacesException
Description copied from class: ViewHandler
Initialize the view for the request processing lifecycle.

This method must be called at the beginning of the Restore View Phase of the Request Processing Lifecycle. It is responsible for performing any per-request initialization necessary to the operation of the lifycecle.

The default implementation must perform the following actions. If ExternalContext.getRequestCharacterEncoding() returns null, call calculateCharacterEncoding(javax.faces.context.FacesContext) and pass the result, if non-null, into the ExternalContext.setRequestCharacterEncoding(java.lang.String) method. If ExternalContext.getRequestCharacterEncoding() returns non-null take no action.

Overrides:
initView in class ViewHandler
Throws:
FacesException

getWrapped

public abstract ViewHandler getWrapped()
Description copied from interface: FacesWrapper
A class that implements this interface uses this method to return an instance of the class being wrapped.

Specified by:
getWrapped in interface FacesWrapper<ViewHandler>
Returns:
the instance of the class being wrapped

renderView

public void renderView(FacesContext context,
                       UIViewRoot viewToRender)
                throws IOException,
                       FacesException
Description copied from class: ViewHandler
Perform whatever actions are required to render the response view to the response object associated with the current FacesContext.

Otherwise, the default implementation must obtain a reference to the ViewDeclarationLanguage for the viewId of the argument viewToRender and call its ViewDeclarationLanguage.renderView(javax.faces.context.FacesContext, javax.faces.component.UIViewRoot) method, returning the result and not swallowing any exceptions thrown by that method.

Specified by:
renderView in class ViewHandler
Throws:
IOException
FacesException

writeState

public void writeState(FacesContext context)
                throws IOException
Description copied from class: ViewHandler
Take any appropriate action to either immediately write out the current state information (by calling StateManager.writeState(javax.faces.context.FacesContext, java.lang.Object), or noting where state information should later be written.

This method must do nothing if the current request is an Ajax request. When responding to Ajax requests, the state is obtained by calling StateManager.getViewState(javax.faces.context.FacesContext) and then written into the Ajax response during final encoding (UIViewRoot.encodeEnd(javax.faces.context.FacesContext).

Specified by:
writeState in class ViewHandler
Throws:
IOException

calculateRenderKitId

public String calculateRenderKitId(FacesContext context)
Description copied from class: ViewHandler
Return the id of an available render-kit that should be used to map the JSF components into user presentation.

The render-kit selected (eg html, xhtml, pdf, xul, ...) may depend upon the user, properties associated with the request, etc.

Specified by:
calculateRenderKitId in class ViewHandler

calculateLocale

public Locale calculateLocale(FacesContext context)
Description copied from class: ViewHandler
Return the Locale object that should be used when rendering this view to the current user.

Some request protocols allow an application user to specify what locale they prefer the response to be in. For example, HTTP requests can specify the "accept-language" header.

Method Application.getSupportedLocales() defines what locales this JSF application is capable of supporting.

This method should match such sources of data up and return the Locale object that is the best choice for rendering the current application to the current user.

Specified by:
calculateLocale in class ViewHandler

restoreView

public UIViewRoot restoreView(FacesContext context,
                              String viewId)
Description copied from class: ViewHandler
Perform whatever actions are required to restore the view associated with the specified FacesContext and viewId. It may delegate to the restoreView of the associated StateManager to do the actual work of restoring the view. If there is no available state for the specified viewId, return null.

Otherwise, the default implementation must obtain a reference to the ViewDeclarationLanguage for this viewId and call its ViewDeclarationLanguage.restoreView(javax.faces.context.FacesContext, java.lang.String) method, returning the result and not swallowing any exceptions thrown by that method.

Specified by:
restoreView in class ViewHandler

getResourceURL

public String getResourceURL(FacesContext context,
                             String path)
Description copied from class: ViewHandler
Returns a URL, suitable for encoding and rendering, that (if activated) will retrieve the specified web application resource.

Specified by:
getResourceURL in class ViewHandler

getActionURL

public String getActionURL(FacesContext context,
                           String viewId)
Description copied from class: ViewHandler
Returns a URL, suitable for encoding and rendering, that (if activated) will cause the JSF request processing lifecycle for the specified viewId to be executed

Specified by:
getActionURL in class ViewHandler

createView

public UIViewRoot createView(FacesContext context,
                             String viewId)
Description copied from class: ViewHandler
Build a root node for a component tree.

When a request is received, this method is called if restoreView returns null, ie this is not a "postback". In this case, a root node is created and then renderView is invoked. It is the responsibility of the renderView method to build the full component tree (ie populate the UIViewRoot with descendant nodes).

This method is also invoked when navigation occurs from one view to another, where the viewId passed is the id of the new view to be displayed. Again it is the responsibility of renderView to then populate the viewroot with descendants.

The locale and renderKit settings are inherited from the current UIViewRoot that is configured before this method is called. That means of course that they do NOT get set for GET requests, including navigation that has the redirect flag set.

Specified by:
createView in class ViewHandler

deriveViewId

public String deriveViewId(FacesContext context,
                           String input)
Overrides:
deriveViewId in class ViewHandler
Returns:

deriveLogicalViewId

public String deriveLogicalViewId(FacesContext context,
                                  String rawViewId)
Overrides:
deriveLogicalViewId in class ViewHandler
Returns:

getBookmarkableURL

public String getBookmarkableURL(FacesContext context,
                                 String viewId,
                                 Map<String,List<String>> parameters,
                                 boolean includeViewParams)
Description copied from class: ViewHandler
Return a JSF action URL derived from the viewId argument that is suitable to be used as the target of a link in a JSF response. Compiliant implementations must implement this method as specified in section JSF.7.5.2. The default implementation simply calls through to getActionURL(javax.faces.context.FacesContext, java.lang.String), passing the arguments context and viewId.

Overrides:
getBookmarkableURL in class ViewHandler
Returns:

getRedirectURL

public String getRedirectURL(FacesContext context,
                             String viewId,
                             Map<String,List<String>> parameters,
                             boolean includeViewParams)
Description copied from class: ViewHandler
Return a JSF action URL derived from the viewId argument that is suitable to be used by the NavigationHandler to issue a redirect request to the URL using a NonFaces request. Compiliant implementations must implement this method as specified in section JSF.7.5.2. The default implementation simply calls through to getActionURL(javax.faces.context.FacesContext, java.lang.String), passing the arguments context and viewId.

Overrides:
getRedirectURL in class ViewHandler
Returns:

getViewDeclarationLanguage

public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context,
                                                          String viewId)
Description copied from class: ViewHandler
Return the ViewDeclarationLanguage instance used for this ViewHandler instance.

The default implementation of this method returns null.

Overrides:
getViewDeclarationLanguage in class ViewHandler
Returns:


Copyright © 2014 The Apache Software Foundation. All Rights Reserved.