Esempio n. 1
2
  protected void assignUniqueId(FaceletContext ctx, UIComponent parent, String id, UIComponent c) {

    // If the id is specified as a literal, and the component is being
    // repeated (by c:forEach, for example), use generated unique ids
    // after the first instance
    if (this.id != null && !(this.id.isLiteral() && ComponentSupport.getNeedUniqueIds(ctx))) {
      c.setId(this.id.getValue(ctx));
    } else {
      UIViewRoot root = ComponentSupport.getViewRoot(ctx, parent);
      if (root != null) {
        String uid;
        IdMapper mapper = IdMapper.getMapper(ctx.getFacesContext());
        String mid = ((mapper != null) ? mapper.getAliasedId(id) : id);
        UIComponent ancestorNamingContainer = parent.getNamingContainer();
        if (null != ancestorNamingContainer && ancestorNamingContainer instanceof UniqueIdVendor) {
          uid =
              ((UniqueIdVendor) ancestorNamingContainer).createUniqueId(ctx.getFacesContext(), mid);
        } else {
          uid = root.createUniqueId(ctx.getFacesContext(), mid);
        }
        c.setId(uid);
      }
    }

    if (this.rendererType != null) {
      c.setRendererType(this.rendererType);
    }
  }
Esempio n. 2
0
  public void testComponentAnnotatations() throws Exception {

    getFacesContext()
        .getAttributes()
        .put("javax.faces.IS_POSTBACK_AND_RESTORE_VIEW", Boolean.FALSE);
    Application application = getFacesContext().getApplication();
    application.addComponent("CustomInput", CustomOutput.class.getName());
    CustomOutput c = (CustomOutput) application.createComponent("CustomInput");
    CustomOutput c2 = (CustomOutput) application.createComponent("CustomInput");
    UIViewRoot root = getFacesContext().getViewRoot();
    root.getChildren().add(c);
    root.getChildren().add(c2);
    assertTrue(c.getEvent() instanceof AfterAddToParentEvent);
    assertTrue(c2.getEvent() instanceof AfterAddToParentEvent);
    List<UIComponent> headComponents = root.getComponentResources(getFacesContext(), "head");
    System.out.println(headComponents.toString());
    assertTrue(headComponents.size() == 1);
    assertTrue(headComponents.get(0) instanceof UIOutput);
    assertTrue("test".equals(headComponents.get(0).getAttributes().get("library")));
    List<UIComponent> bodyComponents = root.getComponentResources(getFacesContext(), "body");
    assertTrue(bodyComponents.size() == 1);
    assertTrue(bodyComponents.get(0) instanceof UIOutput);
    assertTrue("test.js".equals(bodyComponents.get(0).getAttributes().get("name")));
    assertTrue("body".equals(bodyComponents.get(0).getAttributes().get("target")));

    application.addComponent("CustomInput2", CustomOutput2.class.getName());
    CustomOutput2 c3 = (CustomOutput2) application.createComponent("CustomInput2");
    root.getChildren().add(c3);
    assertTrue(c3.getEvent() instanceof AfterAddToParentEvent);
    c3.reset();
    c3.encodeAll(getFacesContext());
    assertTrue(c3.getEvent() instanceof BeforeRenderEvent);
  }
Esempio n. 3
0
  public void testResourceBundle() throws Exception {
    ResourceBundle rb = null;
    UIViewRoot root = new UIViewRoot();
    root.setLocale(Locale.ENGLISH);
    getFacesContext().setViewRoot(root);

    // negative test, non-existant rb
    rb = application.getResourceBundle(getFacesContext(), "bogusName");

    assertNull(rb);

    // basic test, existing rb
    rb = application.getResourceBundle(getFacesContext(), "testResourceBundle");

    assertNotNull(rb);

    String value = rb.getString("value1");
    assertEquals("Jerry", value);

    // switch locale to German
    getFacesContext().getViewRoot().setLocale(Locale.GERMAN);
    rb = application.getResourceBundle(getFacesContext(), "testResourceBundle");

    assertNotNull(rb);

    value = rb.getString("value1");
    assertEquals("Bernhard", value);

    // switch to a different rb
    rb = application.getResourceBundle(getFacesContext(), "testResourceBundle2");

    assertNotNull(rb);
    value = rb.getString("label");
    assertEquals("Abflug", value);
  }
 public void setUp() {
   super.setUp();
   UIViewRoot page = Util.getViewHandler(getFacesContext()).createView(getFacesContext(), null);
   page.setViewId("viewId");
   page.setLocale(Locale.US);
   getFacesContext().setViewRoot(page);
 }
  @Override
  public VisitContext getVisitContext(
      FacesContext facesContext, Collection<String> ids, Set<VisitHint> hints) {

    // Prepend the ids with the portlet namespace unless they already start with the namespace, or
    // if the id starts with the SeparatorChar
    if (ids != null) {

      UIViewRoot viewRoot = facesContext.getViewRoot();
      String separator = String.valueOf(UINamingContainer.getSeparatorChar(facesContext));
      String containerClientIdAndSeparator =
          viewRoot.getContainerClientId(facesContext) + separator;

      List<String> newIds = new ArrayList<String>();

      for (String id : ids) {

        if (!id.startsWith(separator) && !id.startsWith(containerClientIdAndSeparator)) {
          id = containerClientIdAndSeparator + id;
        }

        newIds.add(id);
      }

      ids = newIds;
    }

    return wrappedVisitContextFactory.getVisitContext(facesContext, ids, hints);
  }
  public static void setLocale(FacesContext context, Locale locale) {

    UIViewRoot viewRoot = context.getViewRoot();
    if (viewRoot != null) {
      viewRoot.setLocale(locale);
    }
  }
Esempio n. 7
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 public static Locale getLocale(FacesContext context) {
   Locale locale = null;
   UIViewRoot viewRoot = context.getViewRoot();
   if (viewRoot != null) locale = viewRoot.getLocale();
   if (locale == null) locale = Locale.getDefault();
   return locale;
 }
Esempio n. 8
0
  /**
   * Build the view.
   *
   * @param ctx the {@link FacesContext} for the current request
   * @param view the {@link UIViewRoot} to populate based of the Facelet template
   * @throws IOException if an error occurs building the view.
   */
  @Override
  public void buildView(FacesContext ctx, UIViewRoot view) throws IOException {

    if (Util.isViewPopulated(ctx, view)) {
      return;
    }
    updateStateSavingType(ctx, view.getViewId());
    view.setViewId(view.getViewId());

    if (LOGGER.isLoggable(Level.FINE)) {
      LOGGER.fine("Building View: " + view.getViewId());
    }
    if (faceletFactory == null) {
      ApplicationAssociate associate = ApplicationAssociate.getInstance(ctx.getExternalContext());
      faceletFactory = associate.getFaceletFactory();
      assert (faceletFactory != null);
    }
    RequestStateManager.set(ctx, RequestStateManager.FACELET_FACTORY, faceletFactory);
    Facelet f = faceletFactory.getFacelet(view.getViewId());

    // populate UIViewRoot
    f.apply(ctx, view);
    doPostBuildActions(view);
    Util.setViewPopulated(ctx, view);
  }
Esempio n. 9
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  private void deliverPostRestoreStateEvent(FacesContext facesContext) throws FacesException {
    UIViewRoot root = facesContext.getViewRoot();
    final PostRestoreStateEvent postRestoreStateEvent = new PostRestoreStateEvent(root);
    try {
      Set<VisitHint> hints = EnumSet.of(VisitHint.SKIP_ITERATION);
      VisitContext visitContext = VisitContext.createVisitContext(facesContext, null, hints);
      root.visitTree(
          visitContext,
          new VisitCallback() {

            public VisitResult visit(VisitContext context, UIComponent target) {
              postRestoreStateEvent.setComponent(target);
              target.processEvent(postRestoreStateEvent);
              //noinspection ReturnInsideFinallyBlock
              return VisitResult.ACCEPT;
            }
          });
    } catch (AbortProcessingException e) {
      facesContext
          .getApplication()
          .publishEvent(
              facesContext,
              ExceptionQueuedEvent.class,
              new ExceptionQueuedEventContext(facesContext, e, null, PhaseId.RESTORE_VIEW));
    }
  }
Esempio n. 10
0
  /**
   * @param ctx FacesContext.
   * @param viewId the view ID to check or null if viewId is unknown.
   * @return <code>true</code> if partial state saving should be used for the specified view ID,
   *     otherwise <code>false</code>
   */
  public boolean isPartialStateSaving(FacesContext ctx, String viewId) {
    // track UIViewRoot changes
    UIViewRoot root = ctx.getViewRoot();
    UIViewRoot refRoot = viewRootRef.get();
    if (root != refRoot) {
      // set weak reference to current viewRoot
      this.viewRootRef = new WeakReference<UIViewRoot>(root);

      // On first call in restore phase, viewRoot is null, so we treat the first
      // change to not null not as a changing viewRoot.
      if (refRoot != null) {
        // view root changed in request processing - force usage of a
        // new AddRemoveListener instance for the new viewId ...
        modListener = null;
        // ... and also force check for partial state saving for the new viewId
        partialLocked = false;
      }
    }

    if (!partialLocked) {
      if (viewId == null) {
        if (root != null) {
          viewId = root.getViewId();
        } else {
          // View root has not yet been initialized.  Check to see whether
          // the target view id has been stashed away for us.
          viewId = (String) ctx.getAttributes().get(RIConstants.VIEWID_KEY_NAME);
        }
      }

      partial = stateInfo.usePartialStateSaving(viewId);
      partialLocked = true;
    }
    return partial;
  }
Esempio n. 11
0
  /** @see javax.faces.context.FacesContext#getRenderKit() */
  public RenderKit getRenderKit() {
    assertNotReleased();
    UIViewRoot vr = getViewRoot();
    if (vr == null) {
      return (null);
    }
    String renderKitId = vr.getRenderKitId();

    if (renderKitId == null) {
      return null;
    }

    if (renderKitId.equals(lastRkId)) {
      return lastRk;
    } else {
      lastRk = rkFactory.getRenderKit(this, renderKitId);
      if (lastRk == null) {
        if (LOGGER.isLoggable(Level.SEVERE)) {
          LOGGER.log(
              Level.SEVERE,
              "Unable to locate renderkit " + "instance for render-kit-id {0}.  Using {1} instead.",
              new String[] {renderKitId, RenderKitFactory.HTML_BASIC_RENDER_KIT});
        }
      }
      lastRkId = renderKitId;
      return lastRk;
    }
  }
Esempio n. 12
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  public ComponentWrapper startElement(
      FacesContext context,
      ComponentWrapper parent,
      String uri,
      String localName,
      String qName,
      Attributes attributes)
      throws IOException {
    UIViewRoot root = context.getViewRoot();
    HtmlOutputLink link =
        (HtmlOutputLink) context.getApplication().createComponent(HtmlOutputLink.COMPONENT_TYPE);
    link.setId(root.createUniqueId());
    parent.getComponent().getChildren().add(link);

    link.setTarget("_parent");
    ToolCategoryComponent parentCategoryComponent = findParentCategory(parent);
    ToolComponent parentComponent = findParentTool(parent);

    if (parentComponent.getPage() != null) {
      // Resolve the site_type of the form /portal/category/<siteId>/<categoryKey>/<optionalToolId>
      String url =
          parentCategoryComponent.getContext()
              + "/category/"
              + parentCategoryComponent.getSiteId()
              + "/"
              + parentCategoryComponent.getToolCategory().getKey()
              + "/"
              + parentComponent.getPage().getId();
      link.setValue(url);
    }
    return new ComponentWrapper(parent, link, this);
  }
  /** Test the built-in conversion for those renderers that have it. */
  public void testEmptyStrings() {
    UIViewRoot root = Util.getViewHandler(getFacesContext()).createView(getFacesContext(), null);
    root.setLocale(Locale.US);
    UIInput text = new UIInput(), hidden = new UIInput(), secret = new UIInput();

    text.setId("text");
    hidden.setId("hidden");
    secret.setId("secret");

    text.setRendererType("Text");
    hidden.setRendererType("Hidden");
    secret.setRendererType("Secret");

    root.getChildren().add(text);
    root.getChildren().add(hidden);
    root.getChildren().add(secret);
    TextRenderer textRenderer = new TextRenderer();
    HiddenRenderer hiddenRenderer = new HiddenRenderer();
    SecretRenderer secretRenderer = new SecretRenderer();

    try {
      textRenderer.decode(getFacesContext(), text);
      hiddenRenderer.decode(getFacesContext(), hidden);
      secretRenderer.decode(getFacesContext(), secret);
    } catch (Throwable e) {
      assertTrue(false);
    }
    assertTrue(text.isValid());
    assertTrue(hidden.isValid());
    assertTrue(secret.isValid());
  }
Esempio n. 14
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  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);
    }
  }
Esempio n. 15
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  /**
   * Installs a <code>SystemEventListener</code> on the <code>UIViewRoot</code> to track components
   * added to or removed from the view.
   */
  public void startTrackViewModifications(FacesContext ctx, UIViewRoot root) {

    if (modListener == null) {
      modListener = new AddRemoveListener(ctx);
      root.subscribeToViewEvent(PostAddToViewEvent.class, modListener);
      root.subscribeToViewEvent(PreRemoveFromViewEvent.class, modListener);
    }
    setTrackViewModifications(true);
  }
  protected Map<String, Object> getViewMap() {
    UIViewRoot viewRoot = getViewRoot();

    if (viewRoot != null) {
      return viewRoot.getViewMap(true);
    }

    return null;
  }
Esempio n. 17
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 /**
  * Inspect the annotations in the ViewConfigStore, enforcing any restrictions applicable to this
  * phase
  *
  * @param event
  * @param phaseIdType
  */
 private void performObservation(PhaseEvent event, PhaseIdType phaseIdType) {
   UIViewRoot viewRoot = (UIViewRoot) event.getFacesContext().getViewRoot();
   List<? extends Annotation> restrictionsForPhase =
       getRestrictionsForPhase(phaseIdType, viewRoot.getViewId());
   if (restrictionsForPhase != null) {
     log.debugf("Enforcing on phase %s", phaseIdType);
     enforce(event.getFacesContext(), viewRoot, restrictionsForPhase);
   }
 }
  /** Constructor. */
  public DynamicParentComponent() {
    setRendererType("com.sun.faces.test.agnostic.statesaving.basic.DynamicParentComponentRenderer");

    FacesContext context = FacesContext.getCurrentInstance();
    UIViewRoot root = context.getViewRoot();

    if (!context.isPostback()) {
      root.subscribeToViewEvent(PreRenderViewEvent.class, this);
    }
  }
Esempio n. 19
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  private int getFlatSize() {
    FacesContext context = FacesContext.getCurrentInstance();
    UIViewRoot root = context.getViewRoot();

    UIData outerData = (UIData) root.findComponent(list.getOuterDataName()),
        innerData = (UIData) root.findComponent(list.getInnerDataName());

    int size = outerData.getRowCount() * innerData.getRowCount();
    return size;
  }
 /** @see javax.faces.event.PhaseListener#beforePhase(javax.faces.event.PhaseEvent) */
 public void beforePhase(PhaseEvent event) {
   LOGGER.debug("Before phase {0}", event.getPhaseId());
   if (event.getPhaseId() == PhaseId.RENDER_RESPONSE) {
     UIViewRoot viewRoot = event.getFacesContext().getViewRoot();
     if (viewRoot != null) {
       LOGGER.debug(
           "Subscribing to event {0} with listener {1}", PRERENDER_EVENT_CLASS, HOOKING_EVENT);
       viewRoot.subscribeToEvent(PRERENDER_EVENT_CLASS, HOOKING_EVENT);
     }
   }
 }
Esempio n. 21
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 //
 // Methods from TestCase
 //
 public void setUp() {
   super.setUp();
   ApplicationFactory aFactory =
       (ApplicationFactory) FactoryFinder.getFactory(FactoryFinder.APPLICATION_FACTORY);
   application = aFactory.getApplication();
   UIViewRoot viewRoot =
       Util.getViewHandler(getFacesContext()).createView(getFacesContext(), null);
   viewRoot.setViewId("viewId");
   viewRoot.setLocale(Locale.US);
   getFacesContext().setViewRoot(viewRoot);
 }
  public void inserir() {
    EntityManager manager = this.getManager();
    FornecedorDao fncDao = new FornecedorDaoJpa(manager);
    fncDao.save(fornecedor);
    this.mensagens.info();

    FacesContext facesContext = FacesContext.getCurrentInstance();
    UIViewRoot uiViewRoot = facesContext.getViewRoot();
    limparComponente.cleanSubmittedValues(uiViewRoot.findComponent("form:painel"));
    /*return "/cadastro/fornecedor.xhtml";*/
  }
Esempio n. 23
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  /** Reload the current active page. */
  public static void reloadPage() {
    FacesContext context = FacesContext.getCurrentInstance();

    String viewId = context.getViewRoot().getViewId();

    ViewHandler handler = context.getApplication().getViewHandler();

    UIViewRoot root = handler.createView(context, viewId);
    root.setViewId(viewId);
    context.setViewRoot(root);
  }
Esempio n. 24
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  /**
   * @see javax.faces.view.ViewDeclarationLanguage#renderView(javax.faces.context.FacesContext,
   *     javax.faces.component.UIViewRoot)
   */
  public void renderView(FacesContext ctx, UIViewRoot viewToRender) throws IOException {

    // suppress rendering if "rendered" property on the component is
    // false
    if (!viewToRender.isRendered()) {
      return;
    }

    // log request
    if (LOGGER.isLoggable(Level.FINE)) {
      LOGGER.fine("Rendering View: " + viewToRender.getViewId());
    }

    WriteBehindStateWriter stateWriter = null;
    try {
      // Only build the view if this view has not yet been built.
      if (!Util.isViewPopulated(ctx, viewToRender)) {
        this.buildView(ctx, viewToRender);
      }

      // setup writer and assign it to the ctx
      ResponseWriter origWriter = ctx.getResponseWriter();
      if (origWriter == null) {
        origWriter = createResponseWriter(ctx);
      }

      stateWriter = new WriteBehindStateWriter(origWriter, ctx, responseBufferSize);

      ResponseWriter writer = origWriter.cloneWithWriter(stateWriter);
      ctx.setResponseWriter(writer);

      // render the view to the response
      writer.startDocument();
      viewToRender.encodeAll(ctx);
      writer.endDocument();

      // finish writing
      writer.close();

      boolean writtenState = stateWriter.stateWritten();
      // flush to origWriter
      if (writtenState) {
        stateWriter.flushToWriter();
      }

    } catch (FileNotFoundException fnfe) {
      this.handleFaceletNotFound(ctx, viewToRender.getViewId(), fnfe.getMessage());
    } catch (Exception e) {
      this.handleRenderException(ctx, e);
    } finally {
      if (stateWriter != null) stateWriter.release();
    }
  }
Esempio n. 25
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 @Override
 public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
   ResponseWriter writer = context.getResponseWriter();
   UIViewRoot viewRoot = context.getViewRoot();
   ListIterator iter = (viewRoot.getComponentResources(context, "body")).listIterator();
   while (iter.hasNext()) {
     UIComponent resource = (UIComponent) iter.next();
     resource.encodeAll(context);
   }
   RenderKitUtils.renderUnhandledMessages(context);
   writer.endElement("body");
 }
Esempio n. 26
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  /**
   * @see javax.faces.view.ViewDeclarationLanguage#createView(javax.faces.context.FacesContext,
   *     String)
   * @return
   */
  @Override
  public UIViewRoot createView(FacesContext ctx, String viewId) {

    if (UIDebug.debugRequest(ctx)) {
      UIViewRoot root =
          (UIViewRoot) ctx.getApplication().createComponent(UIViewRoot.COMPONENT_TYPE);
      root.setViewId(viewId);
      return root;
    }

    return super.createView(ctx, viewId);
  }
Esempio n. 27
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  /**
   * This is a separate method to account for handling the content after the view tag.
   *
   * <p>Create a new ResponseWriter around this response's Writer. Set it into the FacesContext,
   * saving the old one aside.
   *
   * <p>call encodeBegin(), encodeChildren(), encodeEnd() on the argument <code>UIViewRoot</code>.
   *
   * <p>Restore the old ResponseWriter into the FacesContext.
   *
   * <p>Write out the after view content to the response's writer.
   *
   * <p>Flush the response buffer, and remove the after view content from the request scope.
   *
   * @param context the <code>FacesContext</code> for the current request
   * @param viewToRender the view to render
   * @throws java.io.IOException if an error occurs rendering the view to the client
   * @throws javax.faces.FacesException if some error occurs within the framework processing
   */
  private void doRenderView(FacesContext context, UIViewRoot viewToRender) throws IOException {

    if (null != associate) {
      associate.responseRendered();
    }

    if (LOGGER.isLoggable(Level.FINE)) {
      LOGGER.log(Level.FINE, "About to render view " + viewToRender.getViewId());
    }

    viewToRender.encodeAll(context);
  }
Esempio n. 28
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  protected void addViewParameters(
      FacesContext ctx, String viewId, Map<String, List<String>> existingParameters) {

    UIViewRoot currentRoot = ctx.getViewRoot();
    String currentViewId = currentRoot.getViewId();
    Collection<UIViewParameter> toViewParams;
    Collection<UIViewParameter> currentViewParams;
    boolean currentIsSameAsNew = false;
    currentViewParams = ViewMetadata.getViewParameters(currentRoot);

    if (currentViewId.equals(viewId)) {
      currentIsSameAsNew = true;
      toViewParams = currentViewParams;
    } else {
      ViewDeclarationLanguage pdl = getViewDeclarationLanguage(ctx, viewId);
      ViewMetadata viewMetadata = pdl.getViewMetadata(ctx, viewId);
      UIViewRoot root = viewMetadata.createMetadataView(ctx);
      toViewParams = ViewMetadata.getViewParameters(root);
    }

    if (toViewParams.isEmpty()) {
      return;
    }

    for (UIViewParameter viewParam : toViewParams) {
      String value;
      // don't bother looking at view parameter if it's been overridden
      if (existingParameters.containsKey(viewParam.getName())) {
        continue;
      } else if (paramHasValueExpression(viewParam)) {
        value = viewParam.getStringValueFromModel(ctx);
      } else {
        // Anonymous view parameter:
        // Get string value from UIViewParameter instance stored in current view
        if (currentIsSameAsNew) {
          value = viewParam.getStringValue(ctx);
        }
        // ...or transfer string value from matching UIViewParameter instance stored in current view
        else {
          value = getStringValueToTransfer(ctx, viewParam, currentViewParams);
        }
      }
      if (value != null) {
        List<String> existing = existingParameters.get(viewParam.getName());
        if (existing == null) {
          existing = new ArrayList<String>(4);
          existingParameters.put(viewParam.getName(), existing);
        }
        existing.add(value);
      }
    }
  }
Esempio n. 29
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  /** @see FacesContext#setViewRoot(javax.faces.component.UIViewRoot) */
  public void setViewRoot(UIViewRoot root) {
    assertNotReleased();
    Util.notNull("root", root);

    if (viewRoot != null && !viewRoot.equals(root)) {
      Map<String, Object> viewMap = viewRoot.getViewMap(false);
      if (viewMap != null) {
        viewRoot.getViewMap().clear();
      }
    }

    viewRoot = root;
  }
Esempio n. 30
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 /**
  * @param context the <code>FacesContext</code> for the current request
  * @return the Locale from the UIViewRoot, the the value of Locale.getDefault()
  */
 public static Locale getLocaleFromContextOrSystem(FacesContext context) {
   Locale result, temp = Locale.getDefault();
   UIViewRoot root;
   result = temp;
   if (null != context) {
     if (null != (root = context.getViewRoot())) {
       if (null == (result = root.getLocale())) {
         result = temp;
       }
     }
   }
   return result;
 }