How to use

getViewDeclarationLanguage

method

in

javax.faces.application.ViewHandler

/**
 * Builds the view if not already available. This is mostly required for ViewExpiredException's.
 *
 * @param context The {@link FacesContext}.
 * @param throwable The occurred {@link Throwable}.
 * @param rootCause The root cause.
 * @return The unwrapped {@link Throwable}.
 * @throws java.io.IOException If building the view fails.
 */
protected Throwable buildView(FacesContext context, Throwable throwable, Throwable rootCause) throws IOException {
  if (context.getViewRoot() == null) {
    ViewHandler viewHandler = context.getApplication().getViewHandler();
    String viewId = viewHandler.deriveViewId(context, ComponentUtils.calculateViewId(context));
    ViewDeclarationLanguage vdl = viewHandler.getViewDeclarationLanguage(context, viewId);
    UIViewRoot viewRoot = vdl.createView(context, viewId);
    context.setViewRoot(viewRoot);
    vdl.buildView(context, viewRoot);
    // Workaround for Mojarra
    // if UIViewRoot == null -> 'IllegalArgumentException' is throwed instead of 'ViewExpiredException'
    if (rootCause == null && throwable instanceof IllegalArgumentException) {
      rootCause = new javax.faces.application.ViewExpiredException(viewId);
    }
  }
  return rootCause;
}

@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(final FacesContext context, final String viewId)
{
 return parent.getViewDeclarationLanguage(context, viewId);
}

@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(final FacesContext context, final String viewId)
{
 return parent.getViewDeclarationLanguage(context, viewId);
}

@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(final FacesContext context, final String viewId)
{
 return parent.getViewDeclarationLanguage(context, viewId);
}

/**
 * <p>The default behavior of this method is to
 * call {@link ViewHandler#getViewDeclarationLanguage}
 * on the wrapped {@link ViewHandler} object.</p>
 *
 * @since 2.0
 */
@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context,
                             String viewId) {
  return getWrapped().getViewDeclarationLanguage(context, viewId);
  
}

/**
 * <p>The default behavior of this method is to
 * call {@link ViewHandler#getViewDeclarationLanguage}
 * on the wrapped {@link ViewHandler} object.</p>
 *
 * @since 2.0
 */
@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context, String viewId) {
  return getWrapped().getViewDeclarationLanguage(context, viewId);
}

@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(
    FacesContext context, String viewId)
{
  return getWrapped().getViewDeclarationLanguage(context, viewId);
}

@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext facesContext, String s) {
  weaveDelegate();
  return _delegate.getViewDeclarationLanguage(facesContext, s);
}

/**
 * <p>The default behavior of this method is to
 * call {@link ViewHandler#getViewDeclarationLanguage}
 * on the wrapped {@link ViewHandler} object.</p>
 *
 * @since 2.0
 */
@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context,
                             String viewId) {
  return getWrapped().getViewDeclarationLanguage(context, viewId);
  
}

/**
 * <p>The default behavior of this method is to
 * call {@link ViewHandler#getViewDeclarationLanguage}
 * on the wrapped {@link ViewHandler} object.</p>
 *
 * @since 2.0
 */
@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context, String viewId) {
  return getWrapped().getViewDeclarationLanguage(context, viewId);
}

/**
 * <p>
 * The default behavior of this method is to call {@link ViewHandler#getViewDeclarationLanguage}
 * on the wrapped {@link ViewHandler} object.
 * </p>
 *
 * @since 2.0
 */
@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context, String viewId) {
  return getWrapped().getViewDeclarationLanguage(context, viewId);
}

 String viewId = "/path/to/some.xhtml";
FacesContext context = FacesContext.getCurrentInstance();
ViewHandler viewHandler = context.getApplication().getViewHandler();

UIViewRoot view = viewHandler.createView(context, viewId);
viewHandler.getViewDeclarationLanguage(context, viewId).buildView(context, view);
// view should now have children.

/**
 * <p>
 * The default behavior of this method is to call {@link ViewHandler#getViewDeclarationLanguage}
 * on the wrapped {@link ViewHandler} object.
 * </p>
 *
 * @since 2.0
 */
@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context, String viewId) {
  return getWrapped().getViewDeclarationLanguage(context, viewId);
}

/**
 * <p>The default behavior of this method is to
 * call {@link ViewHandler#getViewDeclarationLanguage}
 * on the wrapped {@link ViewHandler} object.</p>
 *
 * @since 2.0
 */
@Override
public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context, String viewId) {
  return getWrapped().getViewDeclarationLanguage(context, viewId);
}

/**
 * @see Faces#getViewDeclarationLanguage()
 */
public static ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context) {
  return context.getApplication().getViewHandler().getViewDeclarationLanguage(context, context.getViewRoot().getViewId());
}

/**
 * @see Faces#getViewDeclarationLanguage()
 */
public static ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context) {
  return context.getApplication().getViewHandler().getViewDeclarationLanguage(context, context.getViewRoot().getViewId());
}

public static void includeCompositeComponent(UIComponent parent, String taglibURI, String tagName, String id) {
  FacesContext context = FacesContext.getCurrentInstance();
  UIComponent composite = context.getApplication().getViewHandler()
      .getViewDeclarationLanguage(context, context.getViewRoot().getViewId())
      .createComponent(context, taglibURI, tagName, null);
  composite.setId(id);
  parent.getChildren().add(composite);
}

/**
 * @see Faces#getMetadataAttributes(String)
 */
public static Map<String, Object> getMetadataAttributes(FacesContext context, String viewId) {
  ViewHandler viewHandler = context.getApplication().getViewHandler();
  ViewDeclarationLanguage vdl = viewHandler.getViewDeclarationLanguage(context, viewId);
  ViewMetadata metadata = vdl.getViewMetadata(context, viewId);
  return (metadata != null)
    ? metadata.createMetadataView(context).getAttributes()
    : Collections.<String, Object>emptyMap();
}

/**
 * @see Faces#getMetadataAttributes(String)
 */
public static Map<String, Object> getMetadataAttributes(FacesContext context, String viewId) {
  ViewHandler viewHandler = context.getApplication().getViewHandler();
  ViewDeclarationLanguage vdl = viewHandler.getViewDeclarationLanguage(context, viewId);
  ViewMetadata metadata = vdl.getViewMetadata(context, viewId);
  return (metadata != null)
    ? metadata.createMetadataView(context).getAttributes()
    : Collections.<String, Object>emptyMap();
}

private void renderErrorPage(final FacesContext facesContext, final String errorPageLocation) throws IOException {
 final ViewHandler viewHandler = facesContext.getApplication().getViewHandler();
 final UIViewRoot viewRoot = viewHandler.createView(facesContext, errorPageLocation);
 facesContext.setViewRoot(viewRoot);
 facesContext.getPartialViewContext().setRenderAll(true);
 final ViewDeclarationLanguage viewDeclarationLanguage = viewHandler
   .getViewDeclarationLanguage(facesContext, errorPageLocation);
 viewDeclarationLanguage.buildView(facesContext, viewRoot);
 facesContext.getApplication().publishEvent(facesContext, PreRenderViewEvent.class, viewRoot);
 viewDeclarationLanguage.renderView(facesContext, viewRoot);
 facesContext.responseComplete();
}