javax.faces.component
Class UIViewRoot

java.lang.Object
  extended by javax.faces.component.UIComponent
      extended by javax.faces.component.UIComponentBase
          extended by javax.faces.component.UIViewRoot
All Implemented Interfaces:
StateHolder

public class UIViewRoot
extends UIComponentBase

UIViewRoot is the UIComponent that represents the root of the UIComponent tree. This component has no rendering, it just serves as the root of the component tree, and as a place to hang per-view PhaseListeners.

For each of the following lifecycle phase methods:

Take the following action regarding PhaseListeners.


Field Summary
static java.lang.String COMPONENT_FAMILY
          The standard component family for this component.
static java.lang.String COMPONENT_TYPE
          The standard component type for this component.
static java.lang.String UNIQUE_ID_PREFIX
          The prefix that will be used for identifiers generated by the createUniqueId() method.
 
Constructor Summary
UIViewRoot()
          Create a new UIViewRoot instance with default property values.
 
Method Summary
 void addPhaseListener(PhaseListener newPhaseListener)
           
 java.lang.String createUniqueId()
          Generate an identifier for a component.
 void encodeBegin(FacesContext context)
          Override the default UIComponentBase.encodeBegin(javax.faces.context.FacesContext) behavior.
 void encodeEnd(FacesContext context)
          Override the default UIComponentBase.encodeEnd(javax.faces.context.FacesContext) behavior.
 javax.el.MethodExpression getAfterPhaseListener()
           
 javax.el.MethodExpression getBeforePhaseListener()
           
 java.lang.String getFamily()
          Return the identifier of the component family to which this component belongs.
 java.util.Locale getLocale()
          Return the Locale to be used in localizing the response being created for this view.
 java.lang.String getRenderKitId()
          Return the render kit identifier of the RenderKit associated with this view.
 java.lang.String getViewId()
          Return the view identifier for this view.
 void processApplication(FacesContext context)
          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 FacesContext.renderResponse() or FacesContext.responseComplete() to be called.
 void processDecodes(FacesContext context)
          Override the default UIComponentBase.processDecodes(javax.faces.context.FacesContext) behavior to broadcast any queued events after the default processing has been completed and to clear out any events for later phases if the event processing for this phase caused FacesContext.renderResponse() or FacesContext.responseComplete() to be called.
 void processUpdates(FacesContext context)
          Override the default UIComponentBase behavior to broadcast any queued events after the default processing has been completed and to clear out any events for later phases if the event processing for this phase caused FacesContext.renderResponse() or FacesContext.responseComplete() to be called.
 void processValidators(FacesContext context)
          Override the default UIComponentBase.processValidators(javax.faces.context.FacesContext) behavior to broadcast any queued events after the default processing has been completed and to clear out any events for later phases if the event processing for this phase caused FacesContext.renderResponse() or FacesContext.responseComplete() to be called.
 void queueEvent(FacesEvent event)
          Override the default UIComponentBase.queueEvent(javax.faces.event.FacesEvent) behavior to accumulate the queued events for later broadcaster.
 void removePhaseListener(PhaseListener toRemove)
           
 void restoreState(FacesContext context, java.lang.Object state)
           Perform any processing required to restore the state from the entries in the state Object.
 java.lang.Object saveState(FacesContext context)
           Gets the state of the instance as a Serializable Object.
 void setAfterPhaseListener(javax.el.MethodExpression newAfterPhase)
          Allow an arbitrary method to be called for the "afterPhase" event as the UIViewRoot runs through its lifecycle.
 void setBeforePhaseListener(javax.el.MethodExpression newBeforePhase)
          Allow an arbitrary method to be called for the "beforePhase" event as the UIViewRoot runs through its lifecycle.
 void setLocale(java.util.Locale locale)
          Set the Locale to be used in localizing the response being created for this view.
 void setRenderKitId(java.lang.String renderKitId)
          Set the render kit identifier of the RenderKit associated with this view.
 void setViewId(java.lang.String viewId)
          Set the view identifier for this view.
 
Methods inherited from class javax.faces.component.UIComponentBase
addFacesListener, broadcast, decode, encodeChildren, findComponent, getAttributes, getChildCount, getChildren, getClientId, getFacesContext, getFacesListeners, getFacet, getFacetCount, getFacets, getFacetsAndChildren, getId, getParent, getRenderer, getRendererType, getRendersChildren, getValueBinding, getValueExpression, invokeOnComponent, isRendered, isTransient, processRestoreState, processSaveState, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, setValueBinding, setValueExpression
 
Methods inherited from class javax.faces.component.UIComponent
encodeAll, getContainerClientId
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

COMPONENT_TYPE

public static final java.lang.String COMPONENT_TYPE

The standard component type for this component.

See Also:
Constant Field Values

COMPONENT_FAMILY

public static final java.lang.String COMPONENT_FAMILY

The standard component family for this component.

See Also:
Constant Field Values

UNIQUE_ID_PREFIX

public static final java.lang.String UNIQUE_ID_PREFIX

The prefix that will be used for identifiers generated by the createUniqueId() method.

See Also:
Constant Field Values
Constructor Detail

UIViewRoot

public UIViewRoot()

Create a new UIViewRoot instance with default property values.

Method Detail

getFamily

public java.lang.String getFamily()
Description copied from class: UIComponent

Return the identifier of the component family to which this component belongs. This identifier, in conjunction with the value of the rendererType property, may be used to select the appropriate Renderer for this component instance.

Specified by:
getFamily in class UIComponent

getRenderKitId

public java.lang.String getRenderKitId()

Return the render kit identifier of the RenderKit associated with this view. Unless explicitly set, as in ViewHandler.createView(javax.faces.context.FacesContext, java.lang.String), the returned value will be null.


setRenderKitId

public void setRenderKitId(java.lang.String renderKitId)

Set the render kit identifier of the 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.

Parameters:
renderKitId - The new RenderKit identifier, or null to disassociate this view with any specific RenderKit instance

getViewId

public java.lang.String getViewId()

Return the view identifier for this view.


setViewId

public void setViewId(java.lang.String viewId)

Set the view identifier for this view.

Parameters:
viewId - The new view identifier

getBeforePhaseListener

public javax.el.MethodExpression getBeforePhaseListener()
Returns:
the MethodExpression that will be invoked before this view is rendered.

setBeforePhaseListener

public void setBeforePhaseListener(javax.el.MethodExpression newBeforePhase)

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 PhaseId.RESTORE_VIEW. Unlike a true PhaseListener, this approach doesn't allow for only receiving PhaseEvents for a given phase.

The method must conform to the signature of PhaseListener.beforePhase(javax.faces.event.PhaseEvent).

Parameters:
newBeforePhase - the MethodExpression that will be invoked before this view is rendered.

getAfterPhaseListener

public javax.el.MethodExpression getAfterPhaseListener()
Returns:
the MethodExpression that will be invoked after this view is rendered.

setAfterPhaseListener

public void setAfterPhaseListener(javax.el.MethodExpression newAfterPhase)

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 except PhaseId.RESTORE_VIEW. Unlike a true PhaseListener, this approach doesn't allow for only receiving PhaseEvents for a given phase.

The method must conform to the signature of PhaseListener.afterPhase(javax.faces.event.PhaseEvent).

Parameters:
newAfterPhase - the MethodExpression that will be invoked after this view is rendered.

removePhaseListener

public void removePhaseListener(PhaseListener toRemove)

addPhaseListener

public void addPhaseListener(PhaseListener newPhaseListener)

queueEvent

public void queueEvent(FacesEvent event)

Override the default UIComponentBase.queueEvent(javax.faces.event.FacesEvent) behavior to accumulate the queued events for later broadcaster.

Overrides:
queueEvent in class UIComponentBase
Parameters:
event - FacesEvent to be queued
Throws:
java.lang.IllegalStateException - if this component is not a descendant of a UIViewRoot
java.lang.NullPointerException - if event is null

processDecodes

public void processDecodes(FacesContext context)

Override the default UIComponentBase.processDecodes(javax.faces.context.FacesContext) behavior to broadcast any queued events after the default processing has been completed and to clear out any events for later phases if the event processing for this phase caused FacesContext.renderResponse() or FacesContext.responseComplete() to be called.

Overrides:
processDecodes in class UIComponentBase
Parameters:
context - FacesContext for the request we are processing
Throws:
java.lang.NullPointerException - if context is null

encodeBegin

public void encodeBegin(FacesContext context)
                 throws java.io.IOException

Override the default UIComponentBase.encodeBegin(javax.faces.context.FacesContext) behavior. If getBeforePhaseListener() returns non-null, invoke it, passing a PhaseEvent for the PhaseId.RENDER_RESPONSE phase. If the internal list populated by calls to addPhaseListener(javax.faces.event.PhaseListener) is non-empty, any listeners in that list must have their PhaseListener.beforePhase(javax.faces.event.PhaseEvent) 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.

Overrides:
encodeBegin in class UIComponentBase
Parameters:
context - FacesContext for the response we are creating
Throws:
java.io.IOException - if an input/output error occurs while rendering

encodeEnd

public void encodeEnd(FacesContext context)
               throws java.io.IOException

Override the default UIComponentBase.encodeEnd(javax.faces.context.FacesContext) behavior. If getAfterPhaseListener() returns non-null, invoke it, passing a PhaseEvent for the PhaseId.RENDER_RESPONSE phase. Any errors that occur during invocation of the afterPhase listener must be logged and swallowed.

Overrides:
encodeEnd in class UIComponentBase
Parameters:
context - FacesContext for the response we are creating
Throws:
java.io.IOException - if an input/output error occurs while rendering

processValidators

public void processValidators(FacesContext context)

Override the default UIComponentBase.processValidators(javax.faces.context.FacesContext) behavior to broadcast any queued events after the default processing has been completed and to clear out any events for later phases if the event processing for this phase caused FacesContext.renderResponse() or FacesContext.responseComplete() to be called.

Overrides:
processValidators in class UIComponentBase
Parameters:
context - FacesContext for the request we are processing
Throws:
java.lang.NullPointerException - if context is null

processUpdates

public void processUpdates(FacesContext context)

Override the default UIComponentBase behavior to broadcast any queued events after the default processing has been completed and to clear out any events for later phases if the event processing for this phase caused FacesContext.renderResponse() or FacesContext.responseComplete() to be called.

Overrides:
processUpdates in class UIComponentBase
Parameters:
context - FacesContext for the request we are processing
Throws:
java.lang.NullPointerException - if context is null

processApplication

public void processApplication(FacesContext context)

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 FacesContext.renderResponse() or FacesContext.responseComplete() to be called.

Parameters:
context - FacesContext for the request we are processing
Throws:
java.lang.NullPointerException - if context is null

createUniqueId

public java.lang.String createUniqueId()

Generate an identifier for a component. The identifier will be prefixed with UNIQUE_ID_PREFIX, and will be unique within this UIViewRoot.


getLocale

public java.util.Locale getLocale()

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 ViewHandler.calculateLocale(javax.faces.context.FacesContext). 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 ViewHandler.calculateLocale(javax.faces.context.FacesContext).

Returns:
The current Locale obtained by executing the above algorithm.

setLocale

public void setLocale(java.util.Locale locale)

Set the Locale to be used in localizing the response being created for this view.

Parameters:
locale - The new localization Locale

saveState

public java.lang.Object saveState(FacesContext context)
Description copied from interface: StateHolder

Gets the state of the instance as a Serializable Object.

If the class that implements this interface has references to instances that implement StateHolder (such as a UIComponent with event handlers, validators, etc.) this method must call the StateHolder.saveState(javax.faces.context.FacesContext) method on all those instances as well. This method must not save the state of children and facets. That is done via the StateManager

This method must not alter the state of the implementing object. In other words, after executing this code:

 Object state = component.saveState(facesContext);
 

component should be the same as before executing it.

The return from this method must be Serializable

Specified by:
saveState in interface StateHolder
Overrides:
saveState in class UIComponentBase

restoreState

public void restoreState(FacesContext context,
                         java.lang.Object state)
Description copied from interface: StateHolder

Perform any processing required to restore the state from the entries in the state Object.

If the class that implements this interface has references to instances that also implement StateHolder (such as a UIComponent with event handlers, validators, etc.) this method must call the StateHolder.restoreState(javax.faces.context.FacesContext, java.lang.Object) method on all those instances as well.

Specified by:
restoreState in interface StateHolder
Overrides:
restoreState in class UIComponentBase


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