/**
* Obtain and return the {@link ResponseStateManager} for the specified #renderKitId.
*
* @param context the {@link FacesContext} of the current request
* @param renderKitId {@link RenderKit} ID
* @return the {@link ResponseStateManager} for the specified #renderKitId
* @throws FacesException if an exception occurs while trying to obtain the <code>
* ResponseStateManager</code>
*/
public static ResponseStateManager getResponseStateManager(
FacesContext context, String renderKitId) throws FacesException {
assert (null != renderKitId);
assert (null != context);
RenderKit renderKit = context.getRenderKit();
if (renderKit == null) {
// check request scope for a RenderKitFactory implementation
RenderKitFactory factory =
(RenderKitFactory)
RequestStateManager.get(context, RequestStateManager.RENDER_KIT_IMPL_REQ);
if (factory != null) {
renderKit = factory.getRenderKit(context, renderKitId);
} else {
factory = (RenderKitFactory) FactoryFinder.getFactory(FactoryFinder.RENDER_KIT_FACTORY);
if (factory == null) {
throw new IllegalStateException();
} else {
RequestStateManager.set(context, RequestStateManager.RENDER_KIT_IMPL_REQ, factory);
}
renderKit = factory.getRenderKit(context, renderKitId);
}
}
return renderKit.getResponseStateManager();
}
static Renderer getRenderer(final FacesContext context, final UIComponent component) {
final String rendererType = component.getRendererType();
if (rendererType == null) {
return null;
}
final RenderKit renderKit = RenderKitUtil.getRenderKit(context);
return renderKit.getRenderer(component.getFamily(), rendererType);
}
private void restoreView(FacesContext context) throws FacesException {
Application app = context.getApplication();
if (app instanceof ApplicationImpl) ((ApplicationImpl) app).initRequest();
ViewHandler view = app.getViewHandler();
view.initView(context);
UIViewRoot viewRoot = context.getViewRoot();
if (viewRoot != null) {
ExternalContext extContext = context.getExternalContext();
viewRoot.setLocale(extContext.getRequestLocale());
doSetBindings(context.getELContext(), viewRoot);
return;
}
String viewId = calculateViewId(context);
String renderKitId = view.calculateRenderKitId(context);
RenderKitFactory renderKitFactory =
(RenderKitFactory) FactoryFinder.getFactory(FactoryFinder.RENDER_KIT_FACTORY);
RenderKit renderKit = renderKitFactory.getRenderKit(context, renderKitId);
ResponseStateManager stateManager = renderKit.getResponseStateManager();
if (stateManager.isPostback(context)) {
viewRoot = view.restoreView(context, viewId);
if (viewRoot != null) {
doSetBindings(context.getELContext(), viewRoot);
} else {
// XXX: backward compat issues with ViewHandler and StateManager
// throw new ViewExpiredException(L.l("{0} is an expired view", viewId));
context.renderResponse();
viewRoot = view.createView(context, viewId);
context.setViewRoot(viewRoot);
}
context.setViewRoot(viewRoot);
} else {
context.renderResponse();
viewRoot = view.createView(context, viewId);
context.setViewRoot(viewRoot);
}
}
/** @see javax.faces.context.FacesContext#isPostback() */
@Override
public boolean isPostback() {
assertNotReleased();
Boolean postback = (Boolean) this.getAttributes().get(POST_BACK_MARKER);
if (postback == null) {
RenderKit rk = this.getRenderKit();
if (rk != null) {
postback = rk.getResponseStateManager().isPostback(this);
} else {
// ViewRoot hasn't been set yet, so calculate the RK
ViewHandler vh = this.getApplication().getViewHandler();
String rkId = vh.calculateRenderKitId(this);
postback = RenderKitUtils.getResponseStateManager(this, rkId).isPostback(this);
}
this.getAttributes().put(POST_BACK_MARKER, postback);
}
return postback;
}
/**
* @param context the {@link FacesContext} for the current request
* @return a {@link ResponseWriter} for processing the request
* @throws IOException if the writer cannot be created
*/
protected ResponseWriter createResponseWriter(FacesContext context) throws IOException {
ExternalContext extContext = context.getExternalContext();
RenderKit renderKit = context.getRenderKit();
// Avoid a cryptic NullPointerException when the renderkit ID
// is incorrectly set
if (renderKit == null) {
String id = context.getViewRoot().getRenderKitId();
throw new IllegalStateException("No render kit was available for id \"" + id + "\"");
}
if (responseBufferSizeSet) {
// set the buffer for content
extContext.setResponseBufferSize(responseBufferSize);
}
// get our content type
String contentType = (String) extContext.getRequestMap().get("facelets.ContentType");
// get the encoding
String encoding = (String) extContext.getRequestMap().get("facelets.Encoding");
// Create a dummy ResponseWriter with a bogus writer,
// so we can figure out what content type the ReponseWriter
// is really going to ask for
ResponseWriter writer =
renderKit.createResponseWriter(NullWriter.Instance, contentType, encoding);
contentType = getResponseContentType(context, writer.getContentType());
encoding = getResponseEncoding(context, writer.getCharacterEncoding());
// apply them to the response
extContext.setResponseContentType(contentType);
extContext.setResponseCharacterEncoding(encoding);
// Now, clone with the real writer
writer = writer.cloneWithWriter(extContext.getResponseOutputWriter());
return writer;
}
@Override
public void encodeChildren(FacesContext facesContext, UIComponent uiComponent)
throws IOException {
// Encode each of the children using a writer that can capture the child markup as a string.
ResponseWriter originalResponseWriter = facesContext.getResponseWriter();
RenderKit renderKit = facesContext.getRenderKit();
StringWriter bufferedChildrenMarkupWriter = new StringWriter();
ResponseWriter stringResponseWriter =
renderKit.createResponseWriter(bufferedChildrenMarkupWriter, null, StringPool.UTF8);
facesContext.setResponseWriter(stringResponseWriter);
List<UIComponent> children = uiComponent.getChildren();
for (UIComponent child : children) {
child.encodeAll(facesContext);
}
facesContext.setResponseWriter(originalResponseWriter);
// Get the output of the JSP tag (and all child JSP tags).
Map<String, Object> componentAttributes = uiComponent.getAttributes();
Tag tag = (Tag) componentAttributes.get(CORRESPONDING_JSP_TAG);
PortalTagOutput portalTagOutput;
try {
portalTagOutput = getPortalTagOutput(facesContext, uiComponent, tag);
String preChildMarkup = portalTagOutput.getMarkup();
String postChildMarkup = null;
// Determine the point at which children should be inserted into the markup.
String childInsertionMarker = getChildInsertionMarker();
if (childInsertionMarker != null) {
int pos = preChildMarkup.indexOf(childInsertionMarker);
if (pos > 0) {
postChildMarkup = preChildMarkup.substring(pos).trim();
preChildMarkup = preChildMarkup.substring(0, pos).trim();
}
}
// Encode the output of the JSP tag up until the point at which children should be inserted.
StringBuilder markup = new StringBuilder(3);
markup.append(preChildMarkup);
// Ensure that scripts are rendered at the bottom of the page.
String scripts = portalTagOutput.getScripts();
if (scripts != null) {
RendererUtil.renderScript(scripts, null);
}
// Encode the children markup.
String childrenMarkup = bufferedChildrenMarkupWriter.toString();
if (childrenMarkup != null) {
markup.append(childrenMarkup);
}
// Encode the output of the JSP tag that is to appear after the children.
if (postChildMarkup != null) {
markup.append(postChildMarkup);
}
ResponseWriter responseWriter = facesContext.getResponseWriter();
logger.debug("Markup before transformation:{0}", markup);
StringBuilder processedMarkup = getMarkup(uiComponent, markup);
logger.debug("Markup after transformation:{0}", processedMarkup);
responseWriter.write(processedMarkup.toString());
} catch (Exception e) {
throw new IOException(e);
}
}
/**
* @see javax.faces.view.ViewDeclarationLanguage#renderView(javax.faces.context.FacesContext,
* javax.faces.component.UIViewRoot)
*/
public void renderView(FacesContext context, UIViewRoot view) throws IOException {
// suppress rendering if "rendered" property on the component is
// false
if (!view.isRendered() || context.getResponseComplete()) {
return;
}
ExternalContext extContext = context.getExternalContext();
if (!Util.isViewPopulated(context, view)) {
buildView(context, view);
}
// set up the ResponseWriter
RenderKitFactory renderFactory =
(RenderKitFactory) FactoryFinder.getFactory(FactoryFinder.RENDER_KIT_FACTORY);
RenderKit renderKit = renderFactory.getRenderKit(context, view.getRenderKitId());
ResponseWriter oldWriter = context.getResponseWriter();
WriteBehindStateWriter stateWriter =
new WriteBehindStateWriter(
extContext.getResponseOutputWriter(), context, responseBufferSize);
ResponseWriter newWriter;
if (null != oldWriter) {
newWriter = oldWriter.cloneWithWriter(stateWriter);
} else {
newWriter =
renderKit.createResponseWriter(
stateWriter, null, extContext.getRequestCharacterEncoding());
}
context.setResponseWriter(newWriter);
// Don't call startDoc and endDoc on a partial response
if (context.getPartialViewContext().isPartialRequest()) {
doRenderView(context, view);
try {
extContext.getFlash().doPostPhaseActions(context);
} catch (UnsupportedOperationException uoe) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine(
"ExternalContext.getFlash() throw UnsupportedOperationException -> Flash unavailable");
}
}
} else {
// render the view to the response
newWriter.startDocument();
doRenderView(context, view);
try {
extContext.getFlash().doPostPhaseActions(context);
} catch (UnsupportedOperationException uoe) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine(
"ExternalContext.getFlash() throw UnsupportedOperationException -> Flash unavailable");
}
}
newWriter.endDocument();
}
// replace markers in the body content and write it to response.
// flush directly to the response
if (stateWriter.stateWritten()) {
stateWriter.flushToWriter();
}
// clear the ThreadLocal reference.
stateWriter.release();
if (null != oldWriter) {
context.setResponseWriter(oldWriter);
}
// write any AFTER_VIEW_CONTENT to the response
// side effect: AFTER_VIEW_CONTENT removed
ViewHandlerResponseWrapper wrapper =
(ViewHandlerResponseWrapper)
RequestStateManager.remove(context, RequestStateManager.AFTER_VIEW_CONTENT);
if (null != wrapper) {
wrapper.flushToWriter(
extContext.getResponseOutputWriter(), extContext.getResponseCharacterEncoding());
}
extContext.responseFlushBuffer();
}
