Class UISelectOne

java.lang.Object

jakarta.faces.component.UIComponent

jakarta.faces.component.UIComponentBase

jakarta.faces.component.UIOutput

jakarta.faces.component.UIInput

jakarta.faces.component.UISelectOne

All Implemented Interfaces:

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

Direct Known Subclasses:

HtmlSelectOneListbox, HtmlSelectOneMenu, HtmlSelectOneRadio

public class UISelectOne
extends UIInput

UISelectOne is a UIComponent that represents the user's choice of zero or one items from among a discrete set of available options. The user can modify the selected value. Optionally, the component can be preconfigured with a currently selected item, by storing it as the value property of the component.

This component is generally rendered as a select box or a group of radio buttons.

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

Nested Class Summary

Nested classes/interfaces inherited from class UIInput

UIInput.ValidateEmptyFields

Modifier and Type	Class	Description
static enum	UIInput.ValidateEmptyFields	Allowed values for the initialization parameter named by the "jakarta.faces.VALIDATE_EMPTY_FIELDS" constant.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	COMPONENT_FAMILY	The standard component family for this component.
static final String	COMPONENT_TYPE	The standard component type for this component.
static final String	INVALID_MESSAGE_ID	The message identifier of the FacesMessage to be created if a value not matching the available options is specified.

Fields inherited from class UIInput

ALWAYS_PERFORM_VALIDATION_WHEN_REQUIRED_IS_TRUE, CONVERSION_MESSAGE_ID, EMPTY_STRING_AS_NULL_PARAM_NAME, REQUIRED_MESSAGE_ID, UPDATE_MESSAGE_ID, VALIDATE_EMPTY_FIELDS_PARAM_NAME

Modifier and Type	Field	Description
static final String	ALWAYS_PERFORM_VALIDATION_WHEN_REQUIRED_IS_TRUE	If this param is set, and calling toLowerCase().equals("true") on a String representation of its value returns true, validation must be performed, even when there is no corresponding value for this component in the incoming request.
static final String	CONVERSION_MESSAGE_ID	The message identifier of the FacesMessage to be created if a conversion error occurs, and neither the page author nor the ConverterException provides a message.
static final String	EMPTY_STRING_AS_NULL_PARAM_NAME	The name of a context parameter that indicates how empty strings need to be interpreted.
static final String	REQUIRED_MESSAGE_ID	The message identifier of the FacesMessage to be created if a required check fails.
static final String	UPDATE_MESSAGE_ID	The message identifier of the FacesMessage to be created if a model update error occurs, and the thrown exception has no message.
static final String	VALIDATE_EMPTY_FIELDS_PARAM_NAME	The name of a context parameter that indicates how empty values should be handled with respect to validation.

Fields inherited from class UIComponent

ATTRS_WITH_DECLARED_DEFAULT_VALUES, BEANINFO_KEY, COMPOSITE_COMPONENT_TYPE_KEY, COMPOSITE_FACET_NAME, FACETS_KEY, VIEW_LOCATION_KEY

Modifier and Type	Field	Description
static final String	ATTRS_WITH_DECLARED_DEFAULT_VALUES	This constant enables one to quickly discover the names of the declared composite component attributes that have been given default values by the composite component author.
static final String	BEANINFO_KEY	The value of this constant is used as the key in the component attribute map, the value for which is a java.beans.BeanInfo implementation describing the composite component.
static final String	COMPOSITE_COMPONENT_TYPE_KEY	The value of this constant is used as the key in the composite component BeanDescriptor for a ValueExpression that evaluates to the component-type of the composite component root UIComponent for this composite component, if one was declared by the composite component author.
static final String	COMPOSITE_FACET_NAME	The value of this constant is used as the key in the Map returned as described in UIComponent.FACETS_KEY for the PropertyDescriptor describing the composite component facet.
static final String	FACETS_KEY	The value of this constant is used as the key in the composite component BeanDescriptor for the Map<PropertyDescriptor> that contains meta-information for the declared facets for this composite component.
static final String	VIEW_LOCATION_KEY	The value of this constant is used as the key in the component attributes Map for the Location in the view at which this component instance resides.

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
String	getFamily()	Return the identifier of the component family to which this component belongs.
String	getGroup()	Returns the name of the radio button group.
void	processValidators(FacesContext context)	If getGroup() is set, and UIInput.getSubmittedValue() is empty, and at least one other component having the same group within a UIForm parent has a non-empty UIInput.getSubmittedValue() or returns true on UIInput.isLocalValueSet() or returns false on UIInput.isValid(), then skip validation for current component, else perform standard superclass processing by super.processValidators(context).
void	setGroup(String group)	Sets the name of the radio button group.
protected void	validateValue(FacesContext context, Object value)	In addition to the standard validation behavior inherited from UIInput, ensure that any specified value is equal to one of the available options.

Methods inherited from class UIInput

addValidator, addValueChangeListener, clearInitialState, compareValues, decode, getConvertedValue, getConverterMessage, getRequiredMessage, getSubmittedValue, getValidatorMessage, getValidators, getValue, getValueChangeListeners, isEmpty, isImmediate, isLocalValueSet, isRequired, isValid, markInitialState, processDecodes, processUpdates, removeValidator, removeValueChangeListener, resetValue, restoreState, saveState, setConverterMessage, setImmediate, setLocalValueSet, setRequired, setRequiredMessage, setSubmittedValue, setValid, setValidatorMessage, setValue, updateModel, validate

Modifier and Type	Method	Description
void	addValidator(Validator validator)	Add a Validator instance to the set associated with this UIInput.
void	addValueChangeListener(ValueChangeListener listener)	Add a new ValueChangeListener to the set of listeners interested in being notified when ValueChangeEvents occur.
void	clearInitialState()	For each of the attached objects on this instance that implement PartialStateHolder, call PartialStateHolder.clearInitialState() on the attached object.
protected boolean	compareValues(Object previous, Object value)	Return true if the new value is different from the previous value.
void	decode(FacesContext context)	Decode any new state of this UIComponent from the request contained in the specified FacesContext, and store this state as needed.
protected Object	getConvertedValue(FacesContext context, Object newSubmittedValue)	Convert the submitted value into a "local value" of the appropriate data type, if necessary.
String	getConverterMessage()	If there has been a call to UIInput.setConverterMessage(String) on this instance, return the message.
String	getRequiredMessage()	If there has been a call to UIInput.setRequiredMessage(String) on this instance, return the message.
Object	getSubmittedValue()	Return the submittedValue value of this UIInput component.
String	getValidatorMessage()	If there has been a call to UIInput.setValidatorMessage(String) on this instance, return the message.
Validator[]	getValidators()	Return the set of registered Validators for this UIInput instance.
Object	getValue()	If there is a local value, return it, otherwise return the result of calling super.getValue().
ValueChangeListener[]	getValueChangeListeners()	Return the set of registered ValueChangeListeners for this UIInput instance.
static boolean	isEmpty(Object value)	Is the value denoting an empty value.
boolean	isImmediate()	Return the "immediate" state for this component.
boolean	isLocalValueSet()	Return the "local value set" state for this component.
boolean	isRequired()	Return the "required field" state for this component.
boolean	isValid()	Return a flag indicating whether the local value of this component is valid (no conversion error has occurred).
void	markInitialState()	In addition to the actions taken in UIOutput when PartialStateHolder.markInitialState() is called, check if any of the installed Validators are PartialStateHolders and if so, call PartialStateHolder.markInitialState() as appropriate.
void	processDecodes(FacesContext context)	Specialized decode behavior on top of that provided by the superclass.
void	processUpdates(FacesContext context)	In addition to the standard processUpdates behavior inherited from UIComponentBase, calls updateModel().
void	removeValidator(Validator validator)	Remove a Validator instance from the set associated with this UIInput, if it was previously associated.
void	removeValueChangeListener(ValueChangeListener listener)	Remove an existing ValueChangeListener (if any) from the set of listeners interested in being notified when ValueChangeEvents occur.
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	setConverterMessage(String message)	Override any ValueExpression set for the "converterMessage" with the literal argument provided to this method.
void	setImmediate(boolean immediate)	Set the "immediate" state for this component.
void	setLocalValueSet(boolean localValueSet)	Sets the "local value set" state for this component.
void	setRequired(boolean required)	Set the "required field" state for this component.
void	setRequiredMessage(String message)	Override any ValueExpression set for the "requiredMessage" with the literal argument provided to this method.
void	setSubmittedValue(Object submittedValue)	Set the submittedValue value of this UIInput component.
void	setValid(boolean valid)	Set a flag indicating whether the local value of this component is valid (no conversion error has occurred).
void	setValidatorMessage(String message)	Override any ValueExpression set for the "validatorMessage" with the literal argument provided to this method.
void	setValue(Object value)	Set the value of this UIComponent (if any).
void	updateModel(FacesContext context)	Perform the following algorithm to update the model data associated with this UIInput, if any, as appropriate.
void	validate(FacesContext context)	Perform the following algorithm to validate the local value of this UIInput.

Methods inherited from class UIOutput

getConverter, getLocalValue, setConverter

Modifier and Type	Method	Description
Converter	getConverter()	Return the Converter (if any) that is registered for this UIComponent.
Object	getLocalValue()	Return the local value of this UIComponent (if any), without evaluating any associated ValueExpression.
void	setConverter(Converter converter)	Set the Converter (if any) that is registered for this UIComponent.

Methods inherited from class UIComponentBase

addClientBehavior, addFacesListener, broadcast, 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, processRestoreState, processSaveState, queueEvent, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, subscribeToEvent, unsubscribeFromEvent

Modifier and Type	Method	Description
void	addClientBehavior(String eventName, ClientBehavior behavior)	This is a default implementation of ClientBehaviorHolder.addClientBehavior(String, ClientBehavior).
protected void	addFacesListener(FacesListener listener)	Add the specified FacesListener to the set of listeners registered to receive event notifications from this UIComponent.
void	broadcast(FacesEvent event)	Broadcast the specified FacesEvent to all registered event listeners who have expressed an interest in events of this type.
void	encodeBegin(FacesContext context)	If our rendered property is true, render the beginning of the current state of this UIComponent to the response contained in the specified FacesContext.
void	encodeChildren(FacesContext context)	If our rendered property is true, render the child UIComponents of this UIComponent.
void	encodeEnd(FacesContext context)	If our rendered property is true, render the ending of the current state of this UIComponent.
UIComponent	findComponent(String expression)	Search for and return the UIComponent with an id that matches the specified search expression (if any), according to the algorithm described below.
Map<String,Object>	getAttributes()	Return a mutable Map representing the attributes (and properties, see below) associated wth this UIComponent, keyed by attribute name (which must be a String).
int	getChildCount()	Return the number of child UIComponents that are associated with this UIComponent.
List<UIComponent>	getChildren()	Return a mutable List representing the child UIComponents associated with this component.
Map<String, List<ClientBehavior>>	getClientBehaviors()	This is a default implementation of ClientBehaviorHolder.getClientBehaviors().
String	getClientId(FacesContext context)	Return a client-side identifier for this component, generating one if necessary.
String	getDefaultEventName()	This is a default implementation of ClientBehaviorHolder.getDefaultEventName().
Collection<String>	getEventNames()	This is a default implementation of ClientBehaviorHolder.getEventNames().
protected FacesContext	getFacesContext()	Convenience method to return the FacesContext instance for the current request.
protected FacesListener[]	getFacesListeners(Class clazz)	Return an array of registered FacesListeners that are instances of the specified class.
UIComponent	getFacet(String name)	Convenience method to return the named facet, if it exists, or null otherwise.
int	getFacetCount()	Return the number of facet UIComponents that are associated with this UIComponent.
Map<String, UIComponent>	getFacets()	Return a mutable Map representing the facet UIComponents associated with this UIComponent, keyed by facet name (which must be a String).
Iterator<UIComponent>	getFacetsAndChildren()	Return an Iterator over the facet followed by child UIComponents of this UIComponent.
String	getId()	Return the component identifier of this UIComponent.
List<SystemEventListener>	getListenersForEventClass(Class<? extends SystemEvent> eventClass)	Return the SystemEventListener instances registered on this UIComponent instance that are interested in events of type eventClass.
UIComponent	getParent()	Return the parent UIComponent of this UIComponent, if any.
Map<String,Object>	getPassThroughAttributes(boolean create)	This method has the same specification as UIComponent.getPassThroughAttributes() except that it is allowed to return null if and only if the argument create is false and no pass through attribute data structure exists for this instance.
protected Renderer	getRenderer(FacesContext context)	Convenience method to return the Renderer instance associated with this component, if any; otherwise, return null.
String	getRendererType()	Return the Renderer type for this UIComponent (if any).
boolean	getRendersChildren()	Return a flag indicating whether this component is responsible for rendering its child components.
boolean	invokeOnComponent(FacesContext context, String clientId, ContextCallback callback)	Starting at this component in the View hierarchy, search for a component with a clientId equal to the argument clientId and, if found, call the ContextCallback.invokeContextCallback(FacesContext, UIComponent) method on the argument callback, passing the current FacesContext and the found component as arguments.
boolean	isRendered()	Return true if this component (and its children) should be rendered during the Render Response phase of the request processing lifecycle.
boolean	isTransient()	If true, the Object implementing this interface must not participate in state saving or restoring.
void	processRestoreState(FacesContext context, Object state)	Perform the component tree processing required by the Restore View phase of the request processing lifecycle for all facets of this component, all children of this component, and this component itself, as follows.
Object	processSaveState(FacesContext context)	Perform the component tree processing required by the state saving portion of the Render Response phase of the request processing lifecycle for all facets of this component, all children of this component, and this component itself, as follows.
void	queueEvent(FacesEvent event)	Queue an event for broadcast at the end of the current request processing lifecycle phase.
protected void	removeFacesListener(FacesListener listener)	Remove the specified FacesListener from the set of listeners registered to receive event notifications from this UIComponent.
static Object	restoreAttachedState(FacesContext context, Object stateObj)	This method is called by UIComponent subclasses that need to restore the objects they saved using UIComponentBase.saveAttachedState(FacesContext, Object).
static Object	saveAttachedState(FacesContext context, Object attachedObject)	This method is called by UIComponent subclasses that want to save one or more attached objects.
void	setId(String id)	Set the component identifier of this UIComponent (if any).
void	setParent(UIComponent parent)	Set the parent UIComponent of this UIComponent.
void	setRendered(boolean rendered)	Set the rendered property of this UIComponent.
void	setRendererType(String rendererType)	Set the Renderer type for this UIComponent, or null for components that render themselves.
void	setTransient(boolean transientFlag)	Denotes whether or not the Object implementing this interface must or must not participate in state saving or restoring.
void	subscribeToEvent(Class<? extends SystemEvent> eventClass, ComponentSystemEventListener componentListener)	Install the listener instance referenced by argument componentListener as a listener for events of type eventClass originating from this specific instance of UIComponent.
void	unsubscribeFromEvent(Class<? extends SystemEvent> eventClass, ComponentSystemEventListener componentListener)	Remove the listener instance referenced by argument componentListener as a listener for events of type eventClass originating from this specific instance of UIComponent.

Methods inherited from class UIComponent

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

Modifier and Type	Method	Description
void	encodeAll(FacesContext context)	If this component returns true from UIComponent.isRendered(), take the following action.
String	getClientId()	Enable Jakarta Expression Language to access the clientId of a component.
static UIComponent	getCompositeComponentParent(UIComponent component)	Finds the nearest composite component parent of the specified component.
String	getContainerClientId(FacesContext context)	Allow components that implement NamingContainer to selectively disable prepending their clientId to their descendent's clientIds by breaking the prepending logic into a separately callable method.
static UIComponent	getCurrentComponent(FacesContext context)	Return the UIComponent instance that is currently processing.
static UIComponent	getCurrentCompositeComponent(FacesContext context)	Return the closest ancestor component, relative to the component returned from UIComponent.getCurrentComponent(FacesContext), that is a composite component, or null if no such component exists.
UIComponent	getFacet(Enum<?> identifier)	Convenience method to return the named facet using an enum identifier, if it exists, or null otherwise.
UIComponent	getNamingContainer()	Starting with "this", return the closest component in the ancestry that is a NamingContainer or null if none can be found.
Map<String,Object>	getPassThroughAttributes()	This is a convenience method that simply calls UIComponent.getPassThroughAttributes(boolean), passing true as the argument.
Map<String,String>	getResourceBundleMap()	Return a Map<String,String> of the ResourceBundle for this component.
protected StateHelper	getStateHelper()	Return the StateHelper instance used to help this component implement PartialStateHolder.
protected StateHelper	getStateHelper(boolean create)	Like UIComponent.getStateHelper(), but only create a state helper instance if the argument creat is true.
TransientStateHelper	getTransientStateHelper()	Return the TransientStateHelper instance for this UIComponent instance.
TransientStateHelper	getTransientStateHelper(boolean create)	Return the TransientStateHelper instance for this UIComponent instance.
jakarta.el.ValueExpression	getValueExpression(String name)	Return the ValueExpression used to calculate the value for the specified attribute or property name, if any.
boolean	initialStateMarked()	An implementation of PartialStateHolder.initialStateMarked(), this method is called by the runtime to test if the PartialStateHolder.markInitialState() method was called.
static boolean	isCompositeComponent(UIComponent component)	Return true if component is a composite component, otherwise false.
boolean	isInView()	Return true if this component is within the view hierarchy otherwise false
protected boolean	isVisitable(VisitContext context)	Return true if this component should be visited, false otherwise.
void	popComponentFromEL(FacesContext context)	Pop the current UIComponent from the FacesContext attributes map so that the previous UIComponent, if any, becomes the current component.
void	processEvent(ComponentSystemEvent event)	The default implementation performs the following action.
void	pushComponentToEL(FacesContext context, UIComponent component)	Push the current UIComponent this to the FacesContext attribute map saving the previous UIComponent for a subsequent call to UIComponent.popComponentFromEL(FacesContext).
void	restoreTransientState(FacesContext context, Object state)	For components that need to support the concept of transient state, this method will restore any state saved on a prior call to UIComponent.saveTransientState(FacesContext).
Object	saveTransientState(FacesContext context)	For components that need to support the concept of transient state, this method will save any state that is known to be transient in nature.
void	setInView(boolean isInView)	Updates the status as to whether or not this component is currently within the view hierarchy.
void	setValueExpression(String name, jakarta.el.ValueExpression binding)	Set the ValueExpression used to calculate the value for the specified attribute or property name, if any.
boolean	visitTree(VisitContext visitContext, VisitCallback callback)	Perform a tree visit starting at this node in the tree.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

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

INVALID_MESSAGE_ID

public static final String INVALID_MESSAGE_ID

The message identifier of the FacesMessage to be created if a value not matching the available options is specified.

See Also:

• Constant Field Values

Constructor Details

UISelectOne

public UISelectOne()

Create a new UISelectOne instance with default property values.

Method Details

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

Overrides:

getFamily in class UIInput

Returns:

the component family (not null).

getGroup

public String getGroup()

Returns the name of the radio button group.

Radio button components having the same group within a UIForm parent will uncheck all others when being checked. If the value attribute is absent then the one from first component of the group will be used. If the UISelectItem child is absent then the one from first component of the group will be used.

Returns:

The name of the radio button group.

Since:

2.3

setGroup

public void setGroup(String group)

Sets the name of the radio button group.

Parameters:

group - The name of the radio button group.

Since:

2.3

processValidators

public void processValidators(FacesContext context)

If getGroup() is set, and UIInput.getSubmittedValue() is empty, and at least one other component having the same group within a UIForm parent has a non-empty UIInput.getSubmittedValue() or returns true on UIInput.isLocalValueSet() or returns false on UIInput.isValid(), then skip validation for current component, else perform standard superclass processing by super.processValidators(context).

Overrides:

processValidators in class UIInput

Parameters:

context - FacesContext for the request we are processing

See Also:

• PreValidateEvent
• PostValidateEvent

validateValue

protected void validateValue(FacesContext context,
 Object value)

In addition to the standard validation behavior inherited from UIInput, ensure that any specified value is equal to one of the available options. Before comparing each option, coerce the option value type to the type of this component's value following the Expression Language coercion rules. If the specified value is not equal to any of the options, enqueue an error message and set the valid property to false.

If UIInput.isRequired() returns true, and the current value is equal to the value of an inner UISelectItem whose UISelectItem.isNoSelectionOption() method returns true, enqueue an error message and set the valid property to false.

Overrides:

validateValue in class UIInput

Parameters:

context - The FacesContext for the current request

value - The converted value to test for membership.

Throws:

NullPointerException - if context is null