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package javax.faces.component;
import javax.el.MethodExpression;
import javax.faces.FacesException;
import javax.faces.FactoryFinder;
import javax.faces.application.ProjectStage;
import javax.faces.component.visit.VisitResult;
import javax.faces.context.FacesContext;
import javax.faces.lifecycle.Lifecycle;
import javax.faces.lifecycle.LifecycleFactory;
import javax.faces.webapp.FacesServlet;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.ListIterator;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.component.visit.VisitCallback;
import javax.faces.component.visit.VisitContext;
import javax.faces.event.*;
import javax.faces.view.ViewDeclarationLanguage;
import javax.faces.view.ViewMetadata;
/**
* UIViewRoot is the UIComponent
* that represents the root of the UIComponent tree. This component
* renders markup as the response to Ajax requests. It also serves as
* the root of the component tree, and as a place to hang per-view
* {@link PhaseListener}s.
*
* For each of the following lifecycle phase methods:
*
* {@link #processDecodes}
{@link #processValidators}
{@link #processUpdates}
{@link #processApplication}
RenderResponse, via {@link #encodeBegin} and {@link
* #encodeEnd}
* Take the following action regarding
* PhaseListeners.
*
* Initialize a state flag to false.
* If {@link #getBeforePhaseListener} returns non-null,
* invoke the listener, passing in the correct corresponding {@link
* PhaseId} for this phase.
* Upon return from the listener, call {@link
* FacesContext#getResponseComplete} and {@link
* FacesContext#getRenderResponse}. If either return true
* set the internal state flag to true.
* If or one or more listeners have been added by a call to {@link
* #addPhaseListener}, invoke the beforePhase method on
* each one whose {@link PhaseListener#getPhaseId} matches the current
* phaseId, passing in the same PhaseId as in the previous
* step.
* Upon return from each listener, call {@link
* FacesContext#getResponseComplete} and {@link
* FacesContext#getRenderResponse}. If either return true
* set the internal state flag to true.
* Execute any processing for this phase if the internal state flag
* was not set.
* If {@link #getAfterPhaseListener} returns non-null,
* invoke the listener, passing in the correct corresponding {@link
* PhaseId} for this phase.
*
* If or one or more listeners have been added by a call to {@link
* #addPhaseListener}, invoke the afterPhase method on each
* one whose {@link PhaseListener#getPhaseId} matches the current
* phaseId, passing in the same PhaseId as in the previous
* step.
*
*
*
*/
public class UIViewRoot extends UIComponentBase implements UniqueIdVendor {
// ------------------------------------------------------ Manifest Constants
public static final String METADATA_FACET_NAME = "javax_faces_metadata";
/**
* The key in the value set of the
* view metadata BeanDescriptor, the value of which is a
* List<{@link UIViewParameter.Reference}>.
*
* @since 2.0
*/
public static final String VIEW_PARAMETERS_KEY = "javax.faces.component.VIEW_PARAMETERS_KEY";
/** The standard component type for this component.
*/
public static final String COMPONENT_TYPE = "javax.faces.ViewRoot";
/** The standard component family for this component.
*/
public static final String COMPONENT_FAMILY = "javax.faces.ViewRoot";
/**
* The prefix that will be used for identifiers generated
* by the createUniqueId() method.
*/
static public final String UNIQUE_ID_PREFIX = "j_id";
private static Lifecycle lifecycle;
private static final Logger LOGGER =
Logger.getLogger("javax.faces", "javax.faces.LogStrings");
private static final String LOCATION_IDENTIFIER_PREFIX = "javax_faces_location_";
private static final Map LOCATION_IDENTIFIER_MAP =
new HashMap(6, 1.0f);
static {
LOCATION_IDENTIFIER_MAP.put("head", LOCATION_IDENTIFIER_PREFIX + "HEAD");
LOCATION_IDENTIFIER_MAP.put("form", LOCATION_IDENTIFIER_PREFIX + "FORM");
LOCATION_IDENTIFIER_MAP.put("body", LOCATION_IDENTIFIER_PREFIX + "BODY");
}
enum PropertyKeys {
/**
* The render kit identifier of the {@link javax.faces.render.RenderKit} associated
* wth this view.
*/
renderKitId,
/**
* The view identifier of this view.
*/
viewId,
locale,
lastId,
beforePhase,
afterPhase,
phaseListeners,
resourceLibraryContracts
}
// ------------------------------------------------------------ Constructors
/**
* Create a new {@link UIViewRoot} instance with default property
* values.
*/
public UIViewRoot() {
super();
setRendererType(null);
setId(createUniqueId());
}
// ------------------------------------------------------ Instance Variables
/**
* Set and cleared during the lifetime of a lifecycle phase. Has
* no meaning between phases. If true, the lifecycle
* processing for the current phase must not take place.
*/
private boolean skipPhase;
/**
* Set and cleared during the lifetime of a lifecycle phase. Has no
* meaning between phases. If true, the
* MethodExpression associated with afterPhase
* will not be invoked nor will any PhaseListeners associated with this
* UIViewRoot.
*/
private boolean beforeMethodException;
/**
*
Set and cleared during the lifetime of a lifecycle phase. Has no
* meaning between phases.
*/
private ListIterator phaseListenerIterator;
// -------------------------------------------------------------- Properties
/**
* Override superclass method to always return
* {@code true} because a {@code UIViewRoot} is
* defined to always be in a view.
*
* @since 2.0
*/
@Override
public boolean isInView() {
return true;
}
/**
* Overridden to take no action.
*
* @since 2.0
* @param isInView
*/
@Override
public void setInView(boolean isInView) {
// no-op
}
/**
* @see UIComponent#getFamily()
*/
public String getFamily() {
return (COMPONENT_FAMILY);
}
/**
* Return the render kit identifier of the {@link
* javax.faces.render.RenderKit} associated with this view. Unless
* explicitly set, as in {@link
* javax.faces.application.ViewHandler#createView}, the returned
* value will be null.
*/
public String getRenderKitId() {
return (String) getStateHelper().eval(PropertyKeys.renderKitId);
}
/**
* Set the render kit identifier of the {@link javax.faces.render.RenderKit}
* associated with this view. This method may be called at any time
* between the end of Apply Request Values phase of the
* request processing lifecycle (i.e. when events are being broadcast)
* and the beginning of the Render Response phase.
*
* @param renderKitId The new {@link javax.faces.render.RenderKit} identifier,
* or null to disassociate this view with any
* specific {@link javax.faces.render.RenderKit} instance
*/
public void setRenderKitId(String renderKitId) {
getStateHelper().put(PropertyKeys.renderKitId, renderKitId);
}
/** Return the view identifier for this view.
*/
public String getViewId() {
return (String) getStateHelper().get(PropertyKeys.viewId);
}
/**
* Set the view identifier for this view.
*
* @param viewId The new view identifier
*/
public void setViewId(String viewId) {
getStateHelper().put(PropertyKeys.viewId, viewId);
}
// ------------------------------------------------ Event Management Methods
/**
* Return the {@link MethodExpression} that will be invoked
* before this view is rendered.
*
* @return the {@link MethodExpression} that will be invoked before
* this view is rendered.
* @since 1.2
*/
public MethodExpression getBeforePhaseListener() {
return (MethodExpression) getStateHelper().get(PropertyKeys.beforePhase);
}
/**
* Allow an arbitrary method to
* be called for the "beforePhase" event as the UIViewRoot runs
* through its lifecycle. This method will be called for all phases
* except {@link
* PhaseId#RESTORE_VIEW}. Unlike a true {@link PhaseListener}, this
* approach doesn't allow for only receiving {@link PhaseEvent}s for
* a given phase.
* The method must conform to the signature of {@link
* PhaseListener#beforePhase}.
*
* @param newBeforePhase the {@link MethodExpression} that will be
* invoked before this view is rendered.
* @since 1.2
*/
public void setBeforePhaseListener(MethodExpression newBeforePhase) {
getStateHelper().put(PropertyKeys.beforePhase, newBeforePhase);
}
/**
* Return the {@link MethodExpression} that will be invoked after
* this view is rendered.
*
* @return the {@link MethodExpression} that will be invoked after
* this view is rendered.
*
* @since 1.2
*/
public MethodExpression getAfterPhaseListener() {
return (MethodExpression) getStateHelper().get(PropertyKeys.afterPhase);
}
/**
* Allow an arbitrary
* method to be called for the "afterPhase" event as the UIViewRoot
* runs through its lifecycle. This method will be called for all
* phases including {@link
* PhaseId#RESTORE_VIEW}. Unlike a true {@link
* PhaseListener}, this approach doesn't allow for only receiving
* {@link PhaseEvent}s for a given phase.
The method
* must conform to the signature of {@link
* PhaseListener#afterPhase}.
*
* @param newAfterPhase the {@link MethodExpression} that will be
* invoked after this view is rendered.
*
* @since 1.2
*/
public void setAfterPhaseListener(MethodExpression newAfterPhase) {
getStateHelper().put(PropertyKeys.afterPhase, newAfterPhase);
}
/**
* If the argument toRemove is in the list of {@link
* PhaseListener}s for this instance, it must be removed.
* @param toRemove the {@link PhaseListener} to remove.
*
* @since 1.2
*/
public void removePhaseListener(PhaseListener toRemove) {
getStateHelper().remove(PropertyKeys.phaseListeners, toRemove);
}
/**
* Add the argument newPhaseListener to the list of
* {@link PhaseListener}s on this UIViewRoot.
*
* @param newPhaseListener the {@link PhaseListener} to add
*
* @since 1.2
*/
public void addPhaseListener(PhaseListener newPhaseListener) {
getStateHelper().add(PropertyKeys.phaseListeners, newPhaseListener);
}
/**
*
* Return an unmodifiable list of the
* PhaseListener instances attached to this
* UIViewRoot instance.
*
* @since 2.0
*/
public List getPhaseListeners() {
//noinspection unchecked
List result = (List)
getStateHelper().get(PropertyKeys.phaseListeners);
return ((result != null)
? Collections.unmodifiableList(result)
: Collections.unmodifiableList(Collections.emptyList()));
}
/**
* Add argument component,
* which is assumed to represent a resource instance, as a resource
* to this view. A resource instance is rendered by a resource
* Renderer, as described in the Standard HTML
* RenderKit. The default implementation must call through to
* {@link #addComponentResource(javax.faces.context.FacesContext,
* javax.faces.component.UIComponent, java.lang.String)}.
*
*
*
*
* @param context {@link FacesContext} for the current request
* @param componentResource The {@link UIComponent} representing a
* {@link javax.faces.application.Resource} instance
*
* @since 2.0
*/
public void addComponentResource(FacesContext context, UIComponent componentResource) {
addComponentResource(context, componentResource, null);
}
/**
*
Add argument component,
* which is assumed to represent a resource instance, as a resource
* to this view. A resource instance is rendered by a resource
* Renderer, as described in the Standard HTML
* RenderKit.
*
*
* The component must be added using the following
* algorithm:
*
* If the target argument is null,
* look for a target attribute on the
* component. If there is no target
* attribute, set target to be the default value
* head
Call {@link #getComponentResources} to obtain the child
* list for the given target.
If the component ID of componentResource matches the
* the ID of a resource that has allready been added, remove the old
* resource.
Add the component resource to the
* list.
*
*
* @param context {@link FacesContext} for the current request
* @param componentResource The {@link UIComponent} representing a
* {@link javax.faces.application.Resource} instance
* @param target The name of the facet for which the {@link UIComponent} will be added
*
* @since 2.0
*/
public void addComponentResource(FacesContext context, UIComponent componentResource, String target) {
final Map attributes = componentResource.getAttributes();
// look for a target in the component attribute set if arg is not set.
if (target == null) {
target = (String) attributes.get("target");
}
if (target == null) {
target = "head";
}
List facetChildren = getComponentResources(context,
target,
true);
String id = componentResource.getId();
if (id != null) {
for (UIComponent c : facetChildren) {
if (id.equals(c.getId())) {
facetChildren.remove(c);
}
}
}
// add the resource to the facet
facetChildren.add(componentResource);
}
/**
* Return an unmodifiable
* List of {@link UIComponent}s for the provided
* target agrument. Each component in the
* List is assumed to represent a resource
* instance.
*
*
* The default implementation must use an algorithm equivalent to the
* the following.
*
* - Locate the facet for the
component by calling getFacet() using
* target as the argument.
* - If the facet is not found, create the facet by calling
*
context.getApplication().createComponent(). The argument to this method
* must refer to a component that extends {@link UIPanel} and
* overrides the encodeAll() method to take no action.
* This is necessary to prevent component resources from being
* inadvertently rendered.
*
* - Set the
id of the
* facet to be a string created by prepending the literal string
* “javax_faces_location_” (without the
* quotes) to the value of the target argument
* - Add the facet to the facets
Map using target as the key
*
* - return the children of the facet
*
*
*
* @param target The name of the facet for which the components will be returned.
*
* @return A List of {@link UIComponent} children of
* the facet with the name target. If no children are
* found for the facet, return Collections.emptyList().
*
* @throws NullPointerException if target or
* context is null
*
* @since 2.0
*/
public List getComponentResources(FacesContext context,
String target) {
if (target == null) {
throw new NullPointerException();
}
List resources = getComponentResources(context,
target,
false);
return ((resources != null)
? resources
: Collections.emptyList());
}
/**
* Remove argument component,
* which is assumed to represent a resource instance, as a resource
* to this view.
*
*
*
*
* @param context {@link FacesContext} for the current request
* @param componentResource The {@link UIComponent} representing a
* {@link javax.faces.application.Resource} instance
*
* @since 2.0
*/
public void removeComponentResource(FacesContext context, UIComponent componentResource) {
removeComponentResource(context, componentResource, null);
}
/**
*
Remove argument component,
* which is assumed to represent a resource instance, as a resource
* to this view. A resource instance is rendered by a resource
* Renderer, as described in the Standard HTML
* RenderKit.
*
*
*
* The component must be removed using the following algorithm:
*
* - If the
target argument is null, look for a target
* attribute on the component.
* If there is no target attribute, set target to be the default value head
* - Call {@link #getComponentResources} to obtain the child list for the
* given target.
* - Remove the
component resource from the child list.
*
*
*
*
* @param context {@link FacesContext} for the current request
* @param componentResource The {@link UIComponent} representing a
* {@link javax.faces.application.Resource} instance
* @param target The name of the facet for which the {@link UIComponent} will be added
*
* @since 2.0
*/
public void removeComponentResource(FacesContext context, UIComponent componentResource, String target) {
final Map attributes = componentResource.getAttributes();
// look for a target in the component attribute set if arg is not set.
if (target == null) {
target = (String) attributes.get("target");
}
if (target == null) {
target = "head";
}
List facetChildren = getComponentResources(context,
target,
false);
if (facetChildren != null) {
facetChildren.remove(componentResource);
}
}
/**
* An array of Lists of events that have been queued for later
* broadcast, with one List for each lifecycle phase. The list
* indices match the ordinals of the PhaseId instances. This
* instance is lazily instantiated. This list is
* NOT part of the state that is saved and restored
* for this component.
*/
private List> events = null;
/**
* Override the default {@link UIComponentBase#queueEvent} behavior to
* accumulate the queued events for later broadcasting.
*
* @param event {@link FacesEvent} to be queued
*
* @throws IllegalStateException if this component is not a
* descendant of a {@link UIViewRoot}
* @throws NullPointerException if event
* is null
*/
public void queueEvent(FacesEvent event) {
if (event == null) {
throw new NullPointerException();
}
// We are a UIViewRoot, so no need to check for the ISE
if (events == null) {
int len = PhaseId.VALUES.size();
List> events = new ArrayList>(len);
for (int i = 0; i < len; i++) {
events.add(new ArrayList(5));
}
this.events = events;
}
events.get(event.getPhaseId().getOrdinal()).add(event);
}
/**
* Broadcast any events that have been
* queued. First broadcast events that have been queued for {@link
* PhaseId#ANY_PHASE}. Then broadcast ane events that have been
* queued for the current phase. In both cases, {@link
* UIComponent#pushComponentToEL} must be called before the event is
* broadcast, and {@link UIComponent#popComponentFromEL} must be
* called after the return from the broadcast, even in the case of
* an exception.
*
* @param context {@link FacesContext} for the current request
* @param phaseId {@link PhaseId} of the current phase
* @since 2.0
*/
public void broadcastEvents(FacesContext context, PhaseId phaseId) {
if (null == events) {
// no events have been queued
return;
}
boolean hasMoreAnyPhaseEvents;
boolean hasMoreCurrentPhaseEvents;
List eventsForPhaseId =
events.get(PhaseId.ANY_PHASE.getOrdinal());
// keep iterating till we have no more events to broadcast.
// This is necessary for events that cause other events to be
// queued. PENDING(edburns): here's where we'd put in a check
// to prevent infinite event queueing.
do {
// broadcast the ANY_PHASE events first
if (null != eventsForPhaseId) {
// We cannot use an Iterator because we will get
// ConcurrentModificationException errors, so fake it
while (!eventsForPhaseId.isEmpty()) {
FacesEvent event =
eventsForPhaseId.get(0);
UIComponent source = event.getComponent();
UIComponent compositeParent = null;
try {
if (!UIComponent.isCompositeComponent(source)) {
compositeParent = UIComponent.getCompositeComponentParent(source);
}
if (compositeParent != null) {
compositeParent.pushComponentToEL(context, null);
}
source.pushComponentToEL(context, null);
source.broadcast(event);
} catch (AbortProcessingException e) {
context.getApplication().publishEvent(context,
ExceptionQueuedEvent.class,
new ExceptionQueuedEventContext(context,
e,
source,
phaseId));
}
finally {
source.popComponentFromEL(context);
if (compositeParent != null) {
compositeParent.popComponentFromEL(context);
}
}
eventsForPhaseId.remove(0); // Stay at current position
}
}
// then broadcast the events for this phase.
if (null != (eventsForPhaseId = events.get(phaseId.getOrdinal()))) {
// We cannot use an Iterator because we will get
// ConcurrentModificationException errors, so fake it
while (!eventsForPhaseId.isEmpty()) {
FacesEvent event = eventsForPhaseId.get(0);
UIComponent source = event.getComponent();
UIComponent compositeParent = null;
try {
if (!UIComponent.isCompositeComponent(source)) {
compositeParent = getCompositeComponentParent(source);
}
if (compositeParent != null) {
compositeParent.pushComponentToEL(context, null);
}
source.pushComponentToEL(context, null);
source.broadcast(event);
} catch (AbortProcessingException ape) {
// A "return" here would abort remaining events too
context.getApplication().publishEvent(context,
ExceptionQueuedEvent.class,
new ExceptionQueuedEventContext(context,
ape,
source,
phaseId));
}
finally {
source.popComponentFromEL(context);
if (compositeParent != null) {
compositeParent.popComponentFromEL(context);
}
}
eventsForPhaseId.remove(0); // Stay at current position
}
}
// true if we have any more ANY_PHASE events
hasMoreAnyPhaseEvents =
(null != (eventsForPhaseId =
events.get(PhaseId.ANY_PHASE.getOrdinal()))) &&
!eventsForPhaseId.isEmpty();
// true if we have any more events for the argument phaseId
hasMoreCurrentPhaseEvents =
(null != events.get(phaseId.getOrdinal())) &&
!events.get(phaseId.getOrdinal()).isEmpty();
} while (hasMoreAnyPhaseEvents || hasMoreCurrentPhaseEvents);
}
// ------------------------------------------------ Lifecycle Phase Handlers
private void initState() {
skipPhase = false;
beforeMethodException = false;
//noinspection unchecked
List listeners =
(List) getStateHelper().get(PropertyKeys.phaseListeners);
phaseListenerIterator =
((listeners != null) ? listeners.listIterator() : null);
}
// avoid creating the PhaseEvent if possible by doing redundant
// null checks.
private void notifyBefore(FacesContext context, PhaseId phaseId) {
if (getBeforePhaseListener() != null || phaseListenerIterator != null) {
notifyPhaseListeners(context, phaseId, true);
}
}
// avoid creating the PhaseEvent if possible by doing redundant
// null checks.
private void notifyAfter(FacesContext context, PhaseId phaseId) {
if (getAfterPhaseListener() != null || phaseListenerIterator != null) {
notifyPhaseListeners(context, phaseId, false);
}
}
/**
* The default
* implementation must call {@link
* UIComponentBase#processRestoreState} from within a
* try block. The try block must have a
* finally block that ensures that no {@link
* FacesEvent}s remain in the event queue.
* @param context the FacesContext for this requets
* @param state the opaque state object obtained from the {@link
* javax.faces.application.StateManager}
*/
@Override
public void processRestoreState(FacesContext context, Object state) {
// hack to work around older state managers that may not set the
// view root early enough
if (context.getViewRoot() == null) {
context.setViewRoot(this);
}
super.processRestoreState(context, state);
}
/**
*
* Perform partial processing by calling
* {@link javax.faces.context.PartialViewContext#processPartial} with
* {@link PhaseId#APPLY_REQUEST_VALUES} if:
*
* - {@link javax.faces.context.PartialViewContext#isPartialRequest}
* returns
true and we don't have a request to process all
* components in the view
* ({@link javax.faces.context.PartialViewContext#isExecuteAll} returns
* false)
*
* Perform full processing by calling
* {@link UIComponentBase#processDecodes} if one of the following
* conditions are met:
*
* - {@link javax.faces.context.PartialViewContext#isPartialRequest}
* returns
true and we have a request to process all
* components in the view
* ({@link javax.faces.context.PartialViewContext#isExecuteAll} returns
* true)
* - {@link javax.faces.context.PartialViewContext#isPartialRequest}
* returns
false
*
*
*
* Override the default
* {@link UIComponentBase#processDecodes} behavior to broadcast any queued
* events after the default processing or partial processing has been
* completed and to clear out any events for later phases if the event
* processing for this phase caused {@link FacesContext#renderResponse}
* or {@link FacesContext#responseComplete} to be called.
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if context
* is null
*/
@Override
public void processDecodes(FacesContext context) {
initState();
notifyBefore(context, PhaseId.APPLY_REQUEST_VALUES);
try {
if (!skipPhase) {
if (context.getPartialViewContext().isPartialRequest() &&
!context.getPartialViewContext().isExecuteAll()) {
context.getPartialViewContext().processPartial(PhaseId.APPLY_REQUEST_VALUES);
} else {
super.processDecodes(context);
}
broadcastEvents(context, PhaseId.APPLY_REQUEST_VALUES);
}
} finally {
clearFacesEvents(context);
notifyAfter(context, PhaseId.APPLY_REQUEST_VALUES);
}
}
/**
* Visit the clientIds and, if the component is
* an instance of {@link EditableValueHolder},
* call its {@link EditableValueHolder#resetValue} method.
* Use {@link #visitTree} to do the visiting.
*
* @since 2.2
* @param context the {@link FacesContext} for the request we are processing.
* @param clientIds The client ids to be visited, on which the described action will be taken.
*/
public void resetValues(FacesContext context, Collection clientIds) {
this.visitTree(VisitContext.createVisitContext(context, clientIds, null),
new DoResetValues());
}
private static class DoResetValues implements VisitCallback {
@Override
public VisitResult visit(VisitContext context, UIComponent target) {
if (target instanceof EditableValueHolder) {
((EditableValueHolder)target).resetValue();
}
return VisitResult.ACCEPT;
}
}
/**
* Override the default
* {@link UIComponentBase#encodeBegin} behavior. If
* {@link #getBeforePhaseListener} returns non-null,
* invoke it, passing a {@link PhaseEvent} for the {@link
* PhaseId#RENDER_RESPONSE} phase. If the internal list populated
* by calls to {@link #addPhaseListener} is non-empty, any listeners
* in that list must have their {@link PhaseListener#beforePhase}
* method called, passing the PhaseEvent. Any errors
* that occur during invocation of any of the the beforePhase
* listeners must be logged and swallowed. After listeners are invoked
* call superclass processing.
*/
@Override
public void encodeBegin(FacesContext context) throws IOException {
initState();
notifyBefore(context, PhaseId.RENDER_RESPONSE);
if (!context.getResponseComplete()) {
super.encodeBegin(context);
}
}
/**
* If {@link
* javax.faces.context.PartialViewContext#isAjaxRequest} returns
* true, perform partial rendering by calling
* {@link javax.faces.context.PartialViewContext#processPartial} with
* {@link PhaseId#RENDER_RESPONSE}. If {@link
* javax.faces.context.PartialViewContext#isAjaxRequest} returns
* false, delegate to the parent {@link
* javax.faces.component.UIComponentBase#encodeChildren} method.
*
* @since 2.0
*/
@Override
public void encodeChildren(FacesContext context) throws IOException {
if (context.getPartialViewContext().isAjaxRequest()) {
context.getPartialViewContext().processPartial(PhaseId.RENDER_RESPONSE);
} else {
super.encodeChildren(context);
}
}
/**
* If {@link #getAfterPhaseListener}
* returns non-null, invoke it, passing a {@link
* PhaseEvent} for the {@link PhaseId#RENDER_RESPONSE} phase. Any
* errors that occur during invocation of the afterPhase listener
* must be logged and swallowed. If the current view has view
* parameters, as indicated by a non-empty and
* non-UnsupportedOperationException throwing return
* from {@link javax.faces.view.ViewDeclarationLanguage#getViewMetadata(javax.faces.context.FacesContext, String)},
* call {@link UIViewParameter#encodeAll} on each parameter. If
* calling getViewParameters() causes
* UnsupportedOperationException to be thrown, the
* exception must be silently swallowed.
*/
@Override
public void encodeEnd(FacesContext context) throws IOException {
super.encodeEnd(context);
encodeViewParameters(context);
notifyAfter(context, PhaseId.RENDER_RESPONSE);
}
/**
* Call {@link UIComponentBase#getRendersChildren}
* If {@link javax.faces.context.PartialViewContext#isAjaxRequest}
* returns true this method must return true.
*
* @since 2.0
*/
@Override
public boolean getRendersChildren() {
boolean value = super.getRendersChildren();
FacesContext context = FacesContext.getCurrentInstance();
if (context.getPartialViewContext().isAjaxRequest()) {
value = true;
}
return value;
}
/**
* Utility method that notifies phaseListeners for the given
* phaseId. Assumes that either or both the MethodExpression or
* phaseListeners data structure are non-null.
*
* @param context the context for this request
* @param phaseId the {@link PhaseId} of the current phase
* @param isBefore, if true, notify beforePhase listeners. Notify
* afterPhase listeners otherwise.
*/
private void notifyPhaseListeners(FacesContext context,
PhaseId phaseId,
boolean isBefore) {
PhaseEvent event = createPhaseEvent(context, phaseId);
MethodExpression beforePhase = getBeforePhaseListener();
MethodExpression afterPhase = getAfterPhaseListener();
boolean hasPhaseMethodExpression =
(isBefore && (null != beforePhase)) ||
(!isBefore && (null != afterPhase) && !beforeMethodException);
MethodExpression expression = isBefore ? beforePhase : afterPhase;
if (hasPhaseMethodExpression) {
try {
expression.invoke(context.getELContext(), new Object[]{event});
skipPhase = context.getResponseComplete() ||
context.getRenderResponse();
}
catch (Exception e) {
if (isBefore) {
beforeMethodException = true;
}
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE,
"severe.component.unable_to_process_expression",
new Object[] { expression.getExpressionString(),
(isBefore ? "beforePhase" : "afterPhase")});
}
return;
}
}
if (phaseListenerIterator != null && !beforeMethodException) {
while ((isBefore)
? phaseListenerIterator.hasNext()
: phaseListenerIterator.hasPrevious()) {
PhaseListener curListener = ((isBefore)
? phaseListenerIterator.next()
: phaseListenerIterator
.previous());
if (phaseId == curListener.getPhaseId() ||
PhaseId.ANY_PHASE == curListener.getPhaseId()) {
try {
if (isBefore) {
curListener.beforePhase(event);
} else {
curListener.afterPhase(event);
}
skipPhase = context.getResponseComplete() ||
context.getRenderResponse();
}
catch (Exception e) {
if (isBefore && phaseListenerIterator.hasPrevious()) {
phaseListenerIterator.previous();
}
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE,
"severe.component.uiviewroot_error_invoking_phaselistener",
curListener.getClass().getName());
}
return;
}
}
}
}
}
private static PhaseEvent createPhaseEvent(FacesContext context,
PhaseId phaseId)
throws FacesException {
if (lifecycle == null) {
LifecycleFactory lifecycleFactory = (LifecycleFactory)
FactoryFinder.getFactory(FactoryFinder.LIFECYCLE_FACTORY);
String lifecycleId =
context.getExternalContext()
.getInitParameter(FacesServlet.LIFECYCLE_ID_ATTR);
if (lifecycleId == null) {
lifecycleId = LifecycleFactory.DEFAULT_LIFECYCLE;
}
lifecycle = lifecycleFactory.getLifecycle(lifecycleId);
}
return (new PhaseEvent(context, phaseId, lifecycle));
}
/**
*
* Perform partial processing by calling
* {@link javax.faces.context.PartialViewContext#processPartial} with
* {@link PhaseId#PROCESS_VALIDATIONS} if:
*
* - {@link javax.faces.context.PartialViewContext#isPartialRequest}
* returns
true and we don't have a request to process all
* components in the view
* ({@link javax.faces.context.PartialViewContext#isExecuteAll} returns
* false)
*
* Perform full processing by calling
* {@link UIComponentBase#processValidators} if one of the following
* conditions are met:
*
* - {@link javax.faces.context.PartialViewContext#isPartialRequest}
* returns
true and we have a request to process all
* components in the view
* ({@link javax.faces.context.PartialViewContext#isExecuteAll} returns
* true)
* - {@link javax.faces.context.PartialViewContext#isPartialRequest}
* returns
false
*
*
*
* Override the default
* {@link UIComponentBase#processValidators} behavior to broadcast any
* queued events after the default processing or partial processing has been
* completed and to clear out any events for later phases if the event
* processing for this phase caused {@link FacesContext#renderResponse} or
* {@link FacesContext#responseComplete} to be called.
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if context
* is null
*/
@Override
public void processValidators(FacesContext context) {
initState();
notifyBefore(context, PhaseId.PROCESS_VALIDATIONS);
try {
if (!skipPhase) {
if (context.getPartialViewContext().isPartialRequest() &&
!context.getPartialViewContext().isExecuteAll()) {
context.getPartialViewContext().processPartial(PhaseId.PROCESS_VALIDATIONS);
} else {
super.processValidators(context);
}
broadcastEvents(context, PhaseId.PROCESS_VALIDATIONS);
}
} finally {
clearFacesEvents(context);
notifyAfter(context, PhaseId.PROCESS_VALIDATIONS);
}
}
/**
*
* Perform partial processing by calling
* {@link javax.faces.context.PartialViewContext#processPartial} with
* {@link PhaseId#UPDATE_MODEL_VALUES} if:
*
* - {@link javax.faces.context.PartialViewContext#isPartialRequest}
* returns
true and we don't have a request to process all
* components in the view
* ({@link javax.faces.context.PartialViewContext#isExecuteAll} returns
* false)
*
* Perform full processing by calling
* {@link UIComponentBase#processUpdates} if one of the following
* conditions are met:
*
* - {@link javax.faces.context.PartialViewContext#isPartialRequest}
* returns
true and we have a request to process all
* components in the view
* ({@link javax.faces.context.PartialViewContext#isExecuteAll} returns
* true)
* - {@link javax.faces.context.PartialViewContext#isPartialRequest}
* returns
false
*
*
*
* Override the default {@link UIComponentBase}
* behavior to broadcast any queued events after the default processing or
* partial processing has been completed and to clear out any events for
* later phases if the event processing for this phase caused
* {@link FacesContext#renderResponse} or
* {@link FacesContext#responseComplete} to be called.
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if context
* is null
*/
@Override
public void processUpdates(FacesContext context) {
initState();
notifyBefore(context, PhaseId.UPDATE_MODEL_VALUES);
try {
if (!skipPhase) {
if (context.getPartialViewContext().isPartialRequest() &&
!context.getPartialViewContext().isExecuteAll()) {
context.getPartialViewContext().processPartial(PhaseId.UPDATE_MODEL_VALUES);
} else {
super.processUpdates(context);
}
broadcastEvents(context, PhaseId.UPDATE_MODEL_VALUES);
}
} finally {
clearFacesEvents(context);
notifyAfter(context, PhaseId.UPDATE_MODEL_VALUES);
}
}
/**
* Broadcast any events that have been queued for the Invoke
* Application phase of the request processing lifecycle
* and to clear out any events for later phases if the event processing
* for this phase caused {@link FacesContext#renderResponse} or
* {@link FacesContext#responseComplete} to be called.
*
* @param context {@link FacesContext} for the request we are processing
*
* @throws NullPointerException if context
* is null
*/
public void processApplication(FacesContext context) {
initState();
notifyBefore(context, PhaseId.INVOKE_APPLICATION);
try {
if (!skipPhase) {
// NOTE - no tree walk is performed; this is a UIViewRoot-only operation
broadcastEvents(context, PhaseId.INVOKE_APPLICATION);
}
} finally {
clearFacesEvents(context);
notifyAfter(context, PhaseId.INVOKE_APPLICATION);
}
}
// clear out the events if we're skipping to render-response
// or if there is a response complete signal.
private void clearFacesEvents(FacesContext context) {
if (context.getRenderResponse() || context.getResponseComplete()) {
if (events != null) {
for (List eventList : events) {
if (eventList != null) {
eventList.clear();
}
}
events = null;
}
}
}
/**
* Generate an
* identifier for a component. The identifier will be prefixed with
* UNIQUE_ID_PREFIX, and will be unique within the non-{@link NamingContainer} child
* sub-trees of this UIViewRoot.
*/
public String createUniqueId() {
return createUniqueId(getFacesContext(), null);
}
/**Generate an identifier for a component. The identifier
* will be prefixed with UNIQUE_ID_PREFIX, and will be unique
* within this UIViewRoot. Optionally, a unique seed value can
* be supplied by component creators which should be
* included in the generated unique id.
*
* @param context FacesContext
* @param seed an optional seed value - e.g. based on the position of the component in the VDL-template
* @return a unique-id in this component-container
*/
public String createUniqueId(FacesContext context, String seed) {
if (seed != null) {
return UIViewRoot.UNIQUE_ID_PREFIX + seed;
} else {
Integer i = (Integer) getStateHelper().get(PropertyKeys.lastId);
int lastId = ((i != null) ? i : 0);
getStateHelper().put(PropertyKeys.lastId, ++lastId);
return UIViewRoot.UNIQUE_ID_PREFIX + lastId;
}
}
/**
* Return the Locale to be used in localizing the
* response being created for this view.
*
* Algorithm:
*
* If we have a locale ivar, return it. If we have
* a value expression for "locale", get its value. If the value is
* null, return the result of calling {@link
* javax.faces.application.ViewHandler#calculateLocale}. If the
* value is an instance of java.util.Locale return it.
* If the value is a String, convert it to a
* java.util.Locale and return it. If there is no
* value expression for "locale", return the result of calling {@link
* javax.faces.application.ViewHandler#calculateLocale}.
*
* @return The current Locale obtained by executing the
* above algorithm.
*/
public Locale getLocale() {
Object result = getStateHelper().eval(PropertyKeys.locale);
if (result != null) {
Locale locale = null;
if (result instanceof Locale) {
locale = (Locale) result;
} else if (result instanceof String) {
locale = getLocaleFromString((String) result);
}
return locale;
} else {
FacesContext context = getFacesContext();
return context.getApplication().getViewHandler().calculateLocale(context);
}
}
// W3C XML specification refers to IETF RFC 1766 for language code
// structure, therefore the value for the xml:lang attribute should
// be in the form of language or language-country or
// language-country-variant.
private static Locale getLocaleFromString(String localeStr)
throws IllegalArgumentException {
// length must be at least 2.
if (null == localeStr || localeStr.length() < 2) {
throw new IllegalArgumentException("Illegal locale String: " +
localeStr);
}
Locale result = null;
String lang = null;
String country = null;
String variant = null;
char[] seps = {
'-',
'_'
};
int inputLength = localeStr.length();
int i = 0;
int j = 0;
// to have a language, the length must be >= 2
if ((inputLength >= 2) &&
((i = indexOfSet(localeStr, seps, 0)) == -1)) {
// we have only Language, no country or variant
if (2 != localeStr.length()) {
throw new
IllegalArgumentException("Illegal locale String: " +
localeStr);
}
lang = localeStr.toLowerCase();
}
// we have a separator, it must be either '-' or '_'
if (i != -1) {
lang = localeStr.substring(0, i);
// look for the country sep.
// to have a country, the length must be >= 5
if ((inputLength >= 5) &&
(-1 == (j = indexOfSet(localeStr, seps, i + 1)))) {
// no further separators, length must be 5
if (inputLength != 5) {
throw new
IllegalArgumentException("Illegal locale String: " +
localeStr);
}
country = localeStr.substring(i + 1);
}
if (j != -1) {
country = localeStr.substring(i + 1, j);
// if we have enough separators for language, locale,
// and variant, the length must be >= 8.
if (inputLength >= 8) {
variant = localeStr.substring(j + 1);
} else {
throw new
IllegalArgumentException("Illegal locale String: " +
localeStr);
}
}
}
if (variant != null && country != null && lang != null) {
result = new Locale(lang, country, variant);
} else if (lang != null && country != null) {
result = new Locale(lang, country);
} else if (lang != null) {
result = new Locale(lang, "");
}
return result;
}
/**
* @param str local string
* @param set the substring
* @param fromIndex starting index
* @return starting at fromIndex, the index of the
* first occurrence of any substring from set in
* toSearch, or -1 if no such match is found
*/
private static int indexOfSet(String str, char[] set, int fromIndex) {
int result = -1;
for (int i = fromIndex, len = str.length(); i < len; i++) {
for (int j = 0, innerLen = set.length; j < innerLen; j++) {
if (str.charAt(i) == set[j]) {
result = i;
break;
}
}
if (-1 != result) {
break;
}
}
return result;
}
/**
* Set the Locale to be used in localizing the
* response being created for this view.
*
* @param locale The new localization Locale
*/
public void setLocale(Locale locale) {
getStateHelper().put(PropertyKeys.locale, locale);
// Make sure to appraise the EL of this switch in Locale.
FacesContext.getCurrentInstance().getELContext().setLocale(locale);
}
/**
* This implementation simply calls through to {@link
* #getViewMap(boolean)}, passing true as the argument, and
* returns the result.
*
*
* @since 2.0
*/
public Map getViewMap() {
return getViewMap(true);
}
/**
* Returns
* a Map that acts as the
* interface to the data store that is the "view scope", or, if this
* instance does not have such a Map and the
* create argument is true, creates one and
* returns it. This map must be instantiated lazily and cached for return
* from subsequent calls to this method on this UIViewRoot
* instance. {@link javax.faces.application.Application#publishEvent} must
* be called, passing {@link PostConstructViewMapEvent}.class as the
* first argument and this UIViewRoot instance as the second
* argument.
*
* The returned Map must be implemented such that calling
* clear() on the Map causes {@link javax.faces.application.Application#publishEvent} to be
* called, passing {@link PreDestroyViewMapEvent}.class
* as the first argument and this UIViewRoot instance
* as the second argument.
* Depending upon application
* configuration, objects stored in the view map may need to be
* Serializable. In general, it is a good idea to
* ensure that any objects stored in the view map are
* Serializable.
*
* For reasons made clear in {@link javax.faces.view.ViewScoped},
* this map must ultimately be stored in the session. For this reason, a
* {@code true} value for the {@code create} argument will force the
* session to be created with a call to
* {@link javax.faces.context.ExternalContext#getSession(boolean)}.
*
*
*
* See {@link FacesContext#setViewRoot} for the specification of when the
* clear() method must be called.
*
*
*
* @param create true to create a new Map for this
* instance if necessary; false to return
* null if there's no current Map.
*
* @since 2.0
*/
public Map getViewMap(boolean create) {
Map viewMap = (Map)
getTransientStateHelper().getTransient("com.sun.faces.application.view.viewMap");
if (create && viewMap == null) {
viewMap = new ViewMap(getFacesContext().getApplication().getProjectStage());
getTransientStateHelper().putTransient("com.sun.faces.application.view.viewMap", viewMap);
getFacesContext().getApplication().publishEvent(getFacesContext(), PostConstructViewMapEvent.class,
UIViewRoot.class, this);
}
return viewMap;
}
Map,List> viewListeners;
/**
* Install the listener instance
* referenced by argument listener into the
* UIViewRoot as a listener for events of type
* systemEventClass.
*
* Note that installed listeners are not maintained as part of the
* UIViewRoot's state.
*
* @param systemEvent the Class of event for which
* listener must be fired.
* @param listener the implementation of {@link
* javax.faces.event.SystemEventListener} whose {@link
* javax.faces.event.SystemEventListener#processEvent} method must
* be called when events of type systemEventClass are
* fired.
*
* @throws NullPointerException if systemEventClass
* or listener are null.
*
* @since 2.0
*/
public void subscribeToViewEvent(Class systemEvent,
SystemEventListener listener) {
if (systemEvent == null) {
throw new NullPointerException();
}
if (listener == null) {
throw new NullPointerException();
}
if (viewListeners == null) {
viewListeners = new HashMap, List>(4, 1.0f);
}
List listeners = viewListeners.get(systemEvent);
if (listeners == null) {
listeners = new CopyOnWriteArrayList();
viewListeners.put(systemEvent, listeners);
}
listeners.add(listener);
}
/**
* Remove the listener instance
* referenced by argument listener from the
* UIViewRoot as a listener for events of type
* systemEventClass.
*
* @param systemEvent the Class of event for which
* listener must be fired.
* @param listener the implementation of {@link
* javax.faces.event.SystemEventListener} whose {@link
* javax.faces.event.SystemEventListener#processEvent} method must
* be called when events of type systemEventClass are
* fired.
*
* @throws NullPointerException if
* systemEventClass or listener are
* null.
*
* @since 2.0
*/
public void unsubscribeFromViewEvent(Class systemEvent,
SystemEventListener listener) {
if (systemEvent == null) {
throw new NullPointerException();
}
if (listener == null) {
throw new NullPointerException();
}
if (viewListeners != null) {
List listeners = viewListeners.get(systemEvent);
if (listeners != null) {
listeners.remove(listener);
}
}
}
/**
* Return the
* SystemEventListener instances registered on this
* UIComponent instance that are interested in events
* of type eventClass.
*
* @param systemEvent the Class of event for which the
* listeners must be returned.
* @throws NullPointerException if argument systemEvent
* is null.
*
* @since 2.0
*/
public List getViewListenersForEventClass(Class systemEvent) {
if (systemEvent == null) {
throw new NullPointerException();
}
if (viewListeners != null) {
return viewListeners.get(systemEvent);
}
return null;
}
private void encodeViewParameters(FacesContext context) {
ViewDeclarationLanguage vdl = context.getApplication().getViewHandler().
getViewDeclarationLanguage(context, getViewId());
if (vdl == null) {
return;
}
ViewMetadata metadata = vdl.getViewMetadata(context, getViewId());
if (metadata != null) { // perhaps it's not supported
Collection params =
ViewMetadata.getViewParameters(this);
if (params.isEmpty()) {
return;
}
try {
for (UIViewParameter param : params) {
param.encodeAll(context);
}
} catch (IOException e) {
// IOException is forced by contract and is not expected to be thrown in this case
throw new RuntimeException("Unexpected IOException", e);
}
}
}
/**
* Restore ViewScope state. This is
* needed to allow the use of view scoped beans for EL-expressions
* in the template from which the component tree is built. For
* example: <ui:include
* src="#{viewScopedBean.includeFileName}"/>.
*
* @param context
* current FacesContext.
* @param state
* the state object.
*/
public void restoreViewScopeState(FacesContext context, Object state) {
if (context == null) {
throw new NullPointerException();
}
if (state == null) {
return;
}
values = (Object[]) state;
super.restoreState(context, values[0]);
}
// END TENATIVE
// ----------------------------------------------------- StateHolder Methods
private Object[] values;
@Override
public Object saveState(FacesContext context) {
if (context == null) {
throw new NullPointerException();
}
String viewMapId = (String) getTransientStateHelper().getTransient("com.sun.faces.application.view.viewMapId");
Object superState = super.saveState(context);
if (superState != null || viewMapId != null) {
values = new Object[] {superState, viewMapId};
}
return (values);
}
@Override
public void restoreState(FacesContext context, Object state) {
if (context == null) {
throw new NullPointerException();
}
if (state == null) {
return;
}
values = (Object[]) state;
if (!context.getAttributes().containsKey("com.sun.faces.application.view.restoreViewScopeOnly")) {
super.restoreState(context, values[0]);
}
String viewMapId = (String) values[1];
getTransientStateHelper().putTransient("com.sun.faces.application.view.viewMapId", viewMapId);
Map viewMaps = (Map) context.getExternalContext().
getSessionMap().get("com.sun.faces.application.view.activeViewMaps");
if (viewMaps != null) {
Map viewMap = (Map) viewMaps.get(viewMapId);
getTransientStateHelper().putTransient("com.sun.faces.application.view.viewMap", viewMap);
}
}
// --------------------------------------------------------- Private Methods
private static String getIdentifier(String target) {
// check map
String id = LOCATION_IDENTIFIER_MAP.get(target);
if (id == null) {
id = LOCATION_IDENTIFIER_PREFIX + target;
LOCATION_IDENTIFIER_MAP.put(target, id);
}
return id;
}
@SuppressWarnings({"UnusedDeclaration"})
private List getComponentResources(FacesContext context,
String target,
boolean create) {
String location = getIdentifier(target);
UIComponent facet = getFacet(location);
if (facet == null && create) {
// Using an implementation specific component type to prevent
// component resources being rendered at the incorrect time if
// a caller calls UIViewRoot.encodeAll().
facet = context.getApplication().createComponent("javax.faces.ComponentResourceContainer");
facet.setId(location);
getFacets().put(location, facet);
}
return ((facet != null) ? facet.getChildren() : null);
}
private static final class ViewMap extends HashMap {
private static final long serialVersionUID = -1l;
private ProjectStage stage;
// -------------------------------------------------------- Constructors
ViewMap(ProjectStage stage) {
this.stage = stage;
}
// ---------------------------------------------------- Methods from Map
@Override
public void clear() {
FacesContext context = FacesContext.getCurrentInstance();
context.getApplication().publishEvent(context,
PreDestroyViewMapEvent.class,
UIViewRoot.class,
context.getViewRoot());
super.clear();
}
@Override
public Object put(String key, Object value) {
if (value != null && ProjectStage.Development.equals(stage) && !(value instanceof Serializable)) {
LOGGER.log(Level.WARNING,
"warning.component.uiviewroot_non_serializable_attribute_viewmap",
new Object[] { key, value.getClass().getName() });
}
return super.put(key, value);
}
@Override
public void putAll(Map m) {
for (Map.Entry entry : m.entrySet()) {
String k = entry.getKey();
Object v = entry.getValue();
this.put(k, v);
}
}
} // END ViewMap
}
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