Module org.omnifaces

Package org.omnifaces.resourcehandler

Class ViewResourceHandler

java.lang.Object

jakarta.faces.application.ResourceHandler

jakarta.faces.application.ResourceHandlerWrapper

org.omnifaces.resourcehandler.DefaultResourceHandler

org.omnifaces.resourcehandler.ViewResourceHandler

All Implemented Interfaces:

FacesWrapper<ResourceHandler>

public class ViewResourceHandler
extends DefaultResourceHandler

This ResourceHandler basically turns any concrete non-Facelets file into a Faces view, so that you can use EL expressions and even Faces components in them. The response content type will default to Faces.getMimeType(String) which is configureable in web.xml and overrideable via <f:view contentType="...">.

Real world examples are /sitemap.xml and /robots.txt.

Installation

To get it to run, this handler needs be registered as follows in faces-config.xml:

 <application>
     <resource-handler>org.omnifaces.resourcehandler.ViewResourceHandler</resource-handler>
 </application>
 

To configure the Faces view resources, a "org.omnifaces.VIEW_RESOURCE_HANDLER_URIS" context parameter has to be provided wherein the view resources are specified as a comma separated string of context-relative URIs.

Here is an example configuration:

 <context-param>
     <param-name>org.omnifaces.VIEW_RESOURCE_HANDLER_URIS</param-name>
     <param-value>/sitemap.xml, /products/sitemap.xml, /reviews/sitemap.xml, /robots.txt</param-value>
 </context-param>
 

Wildcards in URIs are at the moment not supported.

The OmniViewHandler will take care of rendering the view.

Since:

3.10

Author:

Bauke Scholtz

See Also:

• DefaultResourceHandler
• OmniViewHandler

Field Summary

Fields

Modifier and Type	Field	Description
static final String	PARAM_NAME_VIEW_RESOURCES	The context parameter name to specify URIs to treat as Faces views.

Fields inherited from class org.omnifaces.resourcehandler.DefaultResourceHandler

RES_NOT_FOUND

Fields inherited from class jakarta.faces.application.ResourceHandler

FACES_SCRIPT_LIBRARY_NAME, FACES_SCRIPT_RESOURCE_NAME, JSF_SCRIPT_LIBRARY_NAME, JSF_SCRIPT_RESOURCE_NAME, LOCALE_PREFIX, RESOURCE_CONTRACT_XML, RESOURCE_EXCLUDES_DEFAULT_VALUE, RESOURCE_EXCLUDES_PARAM_NAME, RESOURCE_IDENTIFIER, WEBAPP_CONTRACTS_DIRECTORY_PARAM_NAME, WEBAPP_RESOURCES_DIRECTORY_PARAM_NAME

Constructor Summary

Constructors

Constructor	Description
ViewResourceHandler(ResourceHandler wrapped)	Creates a new instance of this view resource handler which wraps the given resource handler.

Method Summary

Modifier and Type	Method	Description
static void	addFacesServletMappingsIfNecessary(ServletContext servletContext)	This will map the FacesServlet to the URIs specified in "org.omnifaces.VIEW_RESOURCE_HANDLER_URIS" context parameter.
ViewResource	createViewResource(FacesContext context, String resourceName)	This override ensures that Faces.getRequestServletPath() is returned as concrete resource rather than the provided resourceName when the isViewResourceRequest(FacesContext) returns true.
static boolean	isViewResourceRequest(FacesContext context)	Returns true if the current HTTP request is requesting for a view resource managed by this resource handler.

Methods inherited from class org.omnifaces.resourcehandler.DefaultResourceHandler

createResource, createResource, createResource, createResourceFromLibrary, decorateResource, decorateResource, getLibraryName

Methods inherited from class jakarta.faces.application.ResourceHandlerWrapper

createResourceFromId, getRendererTypeForResourceName, getViewResources, getViewResources, getWrapped, handleResourceRequest, isResourceRendered, isResourceRequest, isResourceURL, libraryExists, markResourceRendered

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

PARAM_NAME_VIEW_RESOURCES

public static final String PARAM_NAME_VIEW_RESOURCES

The context parameter name to specify URIs to treat as Faces views.

See Also:

• Constant Field Values

Constructor Details

ViewResourceHandler

public ViewResourceHandler(ResourceHandler wrapped)

Creates a new instance of this view resource handler which wraps the given resource handler.

Parameters:

wrapped - The resource handler to be wrapped.

Method Details

addFacesServletMappingsIfNecessary

public static void addFacesServletMappingsIfNecessary(ServletContext servletContext)
                                               throws MalformedURLException

This will map the FacesServlet to the URIs specified in "org.omnifaces.VIEW_RESOURCE_HANDLER_URIS" context parameter. This is invoked by ApplicationListener, because the faces servlet registration has to be available for adding new mappings.

Parameters:

servletContext - The involved servlet context.

Throws:

MalformedURLException - When one of the URIs specified in context parameter is malformed.

isViewResourceRequest

public static boolean isViewResourceRequest(FacesContext context)

Returns true if the current HTTP request is requesting for a view resource managed by this resource handler.

Parameters:

context - The involved faces context.

Returns:

true if the current HTTP request is requesting for a view resource managed by this resource handler.

createViewResource

public ViewResource createViewResource(FacesContext context,
 String resourceName)

This override ensures that Faces.getRequestServletPath() is returned as concrete resource rather than the provided resourceName when the isViewResourceRequest(FacesContext) returns true.

Overrides:

createViewResource in class ResourceHandlerWrapper