javax.faces.component
Class UIOutput

java.lang.Object
  javax.faces.component.UIComponent
      javax.faces.component.UIComponentBase
          javax.faces.component.UIOutput

All Implemented Interfaces:

StateHolder, ValueHolder

Direct Known Subclasses:

HtmlOutputFormat, HtmlOutputLabel, HtmlOutputLink, HtmlOutputText, UIInput

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 "javax.faces.Text". This value can be changed by calling the setRendererType() method.

Field Summary

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 javax.faces.component.UIComponent

bindings

Constructor Summary

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

Method Summary

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).

Methods inherited from class javax.faces.component.UIComponentBase

addFacesListener, broadcast, decode, encodeBegin, encodeChildren, encodeEnd, findComponent, getAttributes, getChildCount, getChildren, getClientId, getFacesContext, getFacesListeners, getFacet, getFacetCount, getFacets, getFacetsAndChildren, getId, getParent, getRenderer, getRendererType, getRendersChildren, getValueBinding, getValueExpression, invokeOnComponent, isRendered, isTransient, processDecodes, processRestoreState, processSaveState, processUpdates, processValidators, queueEvent, 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 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.

Specified by:

getFamily in class UIComponent

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

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

getValue

public Object getValue()

Description copied from interface: 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.

Specified by:

getValue in interface ValueHolder

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

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(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,
                         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