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## javax.faces.component
Class UIOutput

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

All Implemented Interfaces:
  EventListener, PartialStateHolder, StateHolder, ValueHolder, ComponentSystemEventListener, FacesListener, SystemEventListenerHolder

Direct Known Subclasses:
  HtmlBody, 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 "`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
`BEANINFO_KEY, bindings, COMPOSITE_COMPONENT_TYPE_KEY, COMPOSITE_FACET_NAME, CURRENT_COMPONENT, CURRENT_COMPOSITE_COMPONENT, FACETS_KEY, VIEW_LOCATION_KEY`

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

Method Summary
`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()` Gets the value of this `UIComponent`.
`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` | `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
`addClientBehavior, addFacesListener, broadcast, decode, encodeBegin, encodeChildren, encodeEnd, findComponent, getAttributes, getChildCount, getChildren, getClientBehaviors, getClientId, getDefaultEventName, getEventNames, 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`

Methods inherited from class javax.faces.component.UIComponent
`encodeAll, getClientId, getCompositeComponentParent, getContainerClientId, getCurrentComponent, getCurrentCompositeComponent, getListenersForEventClass, getNamingContainer, getResourceBundleMap, getStateHelper, getStateHelper, getValueExpression, initialStateMarked, isCompositeComponent, isInView, isVisitable, popComponentFromEL, processEvent, pushComponentToEL, setInView, setValueExpression, subscribeToEvent, unsubscribeFromEvent, 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.

  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`. If validation failed, as indicated by `FacesContext.isValidationFailed()` returning `true`, always return the local value. Otherwise, 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

### 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(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`

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