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:
null
, and is not already
a String
, locate a Converter
(if any) to use
for the conversion, as follows:
null
and a Converter
was located, call its getAsString()
method to perform
the conversion.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
"javax.faces.Text
". This value can be changed by calling the
setRendererType()
method.
Modifier and Type | Field and Description |
---|---|
static String |
COMPONENT_FAMILY
The standard component family for this component.
|
static String |
COMPONENT_TYPE
The standard component type for this component.
|
bindings
Constructor and Description |
---|
UIOutput()
Create a new
UIOutput instance with default property
values. |
Modifier and Type | Method and Description |
---|---|
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()
Gets the value of this
UIComponent . |
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). |
addFacesListener, broadcast, decode, encodeBegin, encodeChildren, encodeEnd, findComponent, getAttributes, getChildCount, getChildren, getClientId, getFacesContext, getFacesListeners, getFacet, getFacetCount, getFacets, getFacetsAndChildren, getId, getParent, getRenderer, getRendererType, getRendersChildren, getValueBinding, invokeOnComponent, isRendered, isTransient, processDecodes, processRestoreState, processSaveState, processUpdates, processValidators, queueEvent, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, setValueBinding
encodeAll, getContainerClientId, getValueExpression, setValueExpression
public static final String COMPONENT_TYPE
The standard component type for this component.
public static final String COMPONENT_FAMILY
The standard component family for this component.
public UIOutput()
Create a new UIOutput
instance with default property
values.
public String getFamily()
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.
getFamily
in class UIComponent
public Converter getConverter()
ValueHolder
Return the Converter
(if any)
that is registered for this UIComponent
.
getConverter
in interface ValueHolder
public void setConverter(Converter converter)
ValueHolder
Set the Converter
(if any)
that is registered for this UIComponent
.
setConverter
in interface ValueHolder
converter
- New Converter
(or null
)public Object getLocalValue()
ValueHolder
Return the local value of this UIComponent
(if any),
without evaluating any associated ValueExpression
.
getLocalValue
in interface ValueHolder
public Object getValue()
ValueHolder
Gets the value of this UIComponent
. First, consult
the local value property of this component. If
non-null
return it. If null
, see if we have a
ValueExpression
for the value
property. If
so, return the result of evaluating the property, otherwise
return null
. Note that because the specification for UIComponent.setValueBinding(java.lang.String, javax.faces.el.ValueBinding)
requires a
call through to UIComponent.setValueExpression(java.lang.String, javax.el.ValueExpression)
, legacy
tags will continue to work.
getValue
in interface ValueHolder
public void setValue(Object value)
ValueHolder
Set the value of this UIComponent
(if any).
setValue
in interface ValueHolder
value
- The new local valuepublic Object saveState(FacesContext context)
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
saveState
in interface StateHolder
saveState
in class UIComponentBase
public void restoreState(FacesContext context, Object state)
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.
restoreState
in interface StateHolder
restoreState
in class UIComponentBase
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