javax.faces.component

Class UISelectOne

java.lang.Object

javax.faces.component.UIComponent

javax.faces.component.UIComponentBase

javax.faces.component.UIOutput

javax.faces.component.UIInput

javax.faces.component.UISelectOne

All Implemented Interfaces:

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

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

Field Summary

Fields

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.
static 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 javax.faces.component.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

Fields inherited from class javax.faces.component.UIComponent

ATTRS_WITH_DECLARED_DEFAULT_VALUES, BEANINFO_KEY, bindings, COMPOSITE_COMPONENT_TYPE_KEY, COMPOSITE_FACET_NAME, CURRENT_COMPONENT, CURRENT_COMPOSITE_COMPONENT, FACETS_KEY, HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME, VIEW_LOCATION_KEY

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and 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 javax.faces.component.UIInput

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

Methods inherited from class javax.faces.component.UIOutput

getConverter, getLocalValue, setConverter

Methods inherited from class javax.faces.component.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, getValueBinding, invokeOnComponent, isRendered, isTransient, processRestoreState, processSaveState, queueEvent, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, setValueBinding, subscribeToEvent, unsubscribeFromEvent

Methods inherited from class javax.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

Methods inherited from interface javax.faces.component.ValueHolder

getConverter, getLocalValue, setConverter

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

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 Detail

UISelectOne

public UISelectOne()

Create a new UISelectOne 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

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