Package jakarta.faces.component

Class UIOutput

java.lang.Object

jakarta.faces.component.UIComponent

jakarta.faces.component.UIComponentBase

jakarta.faces.component.UIOutput

All Implemented Interfaces:

PartialStateHolder, StateHolder, TransientStateHolder, ValueHolder, ComponentSystemEventListener, FacesListener, SystemEventListenerHolder, EventListener

Direct Known Subclasses:

HtmlBody, HtmlDoctype, HtmlHead, HtmlOutputFormat, HtmlOutputLabel, HtmlOutputLink, HtmlOutputText, UIInput, UIOutcomeTarget

public class UIOutput
extends UIComponentBase
implements ValueHolder

UIOutput is a UIComponent that has a value, optionally retrieved from a model tier bean via a value expression, that is displayed to the user. The user cannot directly modify the rendered value; it is for display purposes only.

During the Render Response phase of the request processing lifecycle, the current value of this component must be converted to a String (if it is not already), according to the following rules:

• If the current value is not null, and is not already a String, locate a Converter (if any) to use for the conversion, as follows:
  • If getConverter() returns a non-null Converter, use that one, otherwise
  • If Application.createConverter(Class), passing the current value's class, returns a non-null Converter, use that one.
• If the current value is not null and a Converter was located, call its getAsString() method to perform the conversion.
• If the current value is not null but no Converter was located, call toString() on the current value to perform the conversion.

By default, the rendererType property must be set to "jakarta.faces.Text". This value can be changed by calling the setRendererType() method.

Field Summary

Fields

Modifier and Type	Field	Description
static String	COMPONENT_FAMILY	The standard component family for this component.
static String	COMPONENT_TYPE	The standard component type for this component.

Fields inherited from class jakarta.faces.component.UIComponent

ATTRS_WITH_DECLARED_DEFAULT_VALUES, BEANINFO_KEY, bindings, COMPOSITE_COMPONENT_TYPE_KEY, COMPOSITE_FACET_NAME, FACETS_KEY, VIEW_LOCATION_KEY

Constructor Summary

Constructors

Constructor	Description
UIOutput()	Create a new UIOutput instance with default property values.

Method Summary

Modifier and Type	Method	Description
void	clearInitialState()	For each of the attached objects on this instance that implement PartialStateHolder, call PartialStateHolder.clearInitialState() on the attached object.
Converter	getConverter()	Return the Converter (if any) that is registered for this UIComponent.
String	getFamily()	Return the identifier of the component family to which this component belongs.
Object	getLocalValue()	Return the local value of this UIComponent (if any), without evaluating any associated ValueExpression.
Object	getValue()	Return the value property.
void	markInitialState()	In addition to the actions taken in UIComponentBase when PartialStateHolder.markInitialState() is called, check if the installed Converter is a PartialStateHolder and if it is, call PartialStateHolder.markInitialState() on it.
void	resetValue()	Convenience method to reset this component's value to the un-initialized state.
void	restoreState(FacesContext context, Object state)	Perform any processing required to restore the state from the entries in the state Object.
Object	saveState(FacesContext context)	Gets the state of the instance as a Serializable Object.
void	setConverter(Converter converter)	Set the Converter (if any) that is registered for this UIComponent.
void	setValue(Object value)	Set the value of this UIComponent (if any).

Methods inherited from class jakarta.faces.component.UIComponentBase

addClientBehavior, addFacesListener, broadcast, decode, encodeBegin, encodeChildren, encodeEnd, findComponent, getAttributes, getChildCount, getChildren, getClientBehaviors, getClientId, getDefaultEventName, getEventNames, getFacesContext, getFacesListeners, getFacet, getFacetCount, getFacets, getFacetsAndChildren, getId, getListenersForEventClass, getParent, getPassThroughAttributes, getRenderer, getRendererType, getRendersChildren, invokeOnComponent, isRendered, isTransient, processDecodes, processRestoreState, processSaveState, processUpdates, processValidators, queueEvent, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, subscribeToEvent, unsubscribeFromEvent

Methods inherited from class jakarta.faces.component.UIComponent

encodeAll, getClientId, getCompositeComponentParent, getContainerClientId, getCurrentComponent, getCurrentCompositeComponent, getNamingContainer, getPassThroughAttributes, getResourceBundleMap, getStateHelper, getStateHelper, getTransientStateHelper, getTransientStateHelper, getValueExpression, initialStateMarked, isCompositeComponent, isInView, isVisitable, popComponentFromEL, processEvent, pushComponentToEL, restoreTransientState, saveTransientState, setInView, setValueExpression, visitTree

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 String COMPONENT_TYPE

The standard component type for this component.

See Also:

Constant Field Values

COMPONENT_FAMILY

public static final String COMPONENT_FAMILY

The standard component family for this component.

See Also:

Constant Field Values

Constructor Detail

UIOutput

public UIOutput()

Create a new UIOutput instance with default property values.

Method Detail

getFamily

public 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. Note this method should NOT return null

Specified by:

getFamily in class UIComponent

Returns:

the component family (not null).

getConverter

public Converter getConverter()

Description copied from interface: ValueHolder

Return the Converter (if any) that is registered for this UIComponent.

Specified by:

getConverter in interface ValueHolder

Returns:

the converter.

setConverter

public void setConverter(Converter converter)

Description copied from interface: ValueHolder

Set the Converter (if any) that is registered for this UIComponent.

Specified by:

setConverter in interface ValueHolder

Parameters:

converter - New Converter (or null)

getLocalValue

public Object getLocalValue()

Description copied from interface: ValueHolder

Return the local value of this UIComponent (if any), without evaluating any associated ValueExpression.

Specified by:

getLocalValue in interface ValueHolder

Returns:

the local value.

getValue

public Object getValue()

Return the value property.

Specified by:

getValue in interface ValueHolder

Returns:

the value.

Since:

2.2

setValue

public void setValue(Object value)

Description copied from interface: ValueHolder

Set the value of this UIComponent (if any).

Specified by:

setValue in interface ValueHolder

Parameters:

value - The new local value

resetValue

public void resetValue()

Convenience method to reset this component's value to the un-initialized state.

Since:

2.2

markInitialState

public void markInitialState()

In addition to the actions taken in UIComponentBase when PartialStateHolder.markInitialState() is called, check if the installed Converter is a PartialStateHolder and if it is, call PartialStateHolder.markInitialState() on it.

Specified by:

markInitialState in interface PartialStateHolder

Overrides:

markInitialState in class UIComponentBase

clearInitialState

public void clearInitialState()

Description copied from class: UIComponentBase

For each of the attached objects on this instance that implement PartialStateHolder, call PartialStateHolder.clearInitialState() on the attached object.

Specified by:

clearInitialState in interface PartialStateHolder

Overrides:

clearInitialState in class UIComponentBase

saveState

public 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(jakarta.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

Parameters:

context - the Faces context.

Returns:

the saved state.

restoreState

public void restoreState(FacesContext context,
                         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(jakarta.faces.context.FacesContext, java.lang.Object) method on all those instances as well.

If the state argument is null, take no action and return.

Specified by:

restoreState in interface StateHolder

Overrides:

restoreState in class UIComponentBase

Parameters:

context - the Faces context.

state - the state.