Class UIInput
- All Implemented Interfaces:
EditableValueHolder
,PartialStateHolder
,StateHolder
,TransientStateHolder
,ValueHolder
,ComponentSystemEventListener
,FacesListener
,SystemEventListenerHolder
,EventListener
- Direct Known Subclasses:
HtmlInputFile
,HtmlInputHidden
,HtmlInputSecret
,HtmlInputText
,HtmlInputTextarea
,UISelectBoolean
,UISelectMany
,UISelectOne
,UIViewParameter
See the javadoc for this class in the JSF Specification for further details.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final String
If set to true, validation is always performed when required is true.static final String
static final String
static final String
static final String
Submitted values are decoded as null values instead empty strings.static final String
static final String
static final String
Force validation on empty fields (By default is auto, which means it is only enabled when Bean Validation binaries are available on the current classpath).Fields inherited from class jakarta.faces.component.UIComponent
ATTRS_WITH_DECLARED_DEFAULT_VALUES, BEANINFO_KEY, bindings, COMPOSITE_COMPONENT_TYPE_KEY, COMPOSITE_FACET_NAME, FACETS_KEY, VIEW_LOCATION_KEY
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
addValidator
(Validator validator) See getValidator.void
addValueChangeListener
(ValueChangeListener listener) void
broadcast
(FacesEvent event) Invoke any listeners attached to this object which are listening for an event whose type matches the specified event's runtime type.void
protected boolean
compareValues
(Object previous, Object value) void
decode
(FacesContext context) Check the submitted form parameters for data associated with this component.protected Object
getConvertedValue
(FacesContext context, Object submittedValue) Convert the provided object to the desired value.Text to be displayed to the user as an error message when conversion of a submitted value to the target type fails.Text to be displayed to the user as an error message when this component is marked as "required" but no input data is present during a postback (ie the user left the required field blank).Gets the current submitted value.Text which will be shown if validation fails.See getValidator.getValue()
Return the current value of this component.The valueChange event is delivered when the value attribute is changed.static boolean
Check if a value is empty or not.boolean
A boolean value that identifies the phase during which action events should fire.boolean
Specifies whether a local value is currently set.boolean
A boolean value that indicates whether an input value is required.boolean
isValid()
Specifies whether the component's value is currently valid, ie whether the validators attached to this component have allowed it.void
void
processDecodes
(FacesContext context) Set the "submitted value" of this component from the relevant data in the current servlet request object.void
processUpdates
(FacesContext context) This isn't an input component, so just pass on the processUpdates call to child components and facets that might be input components.void
processValidators
(FacesContext context) void
removeValidator
(Validator validator) See getValidator.void
removeValueChangeListener
(ValueChangeListener listener) void
Convenience method to reset this component's value to an uninitialized state, by resetting the local value and submitted values to null (ensuring thatEditableValueHolder.isLocalValueSet()
is false), and setting "valid" to true.void
restoreState
(FacesContext facesContext, Object state) Invoked in the "restore view" phase, this initialises this object's members from the values saved previously into the provided state object.saveState
(FacesContext facesContext) Invoked after the render phase has completed, this method returns an object which can be passed to the restoreState of some other instance of UIComponentBase to reset that object's state to the same values as this object currently has.void
setConverterMessage
(String converterMessage) void
setImmediate
(boolean immediate) void
setLocalValueSet
(boolean localValueSet) Specify the return value of method isLocalValueSet.void
setRequired
(boolean required) Set to true to cause validation failure when a form containing this component is submitted and there is no value selected for this component.void
setRequiredMessage
(String requiredMessage) void
setSubmittedValue
(Object submittedValue) Invoked during the "decode" phase of processing to inform this component what data was received from the user.void
setValid
(boolean valid) void
setValidatorMessage
(String validatorMessage) void
Store the specified object as the "local value" of this component.void
updateModel
(FacesContext context) void
validate
(FacesContext context) Determine whether the new value is valid, and queue a ValueChangeEvent if necessary.protected void
validateValue
(FacesContext context, Object convertedValue) Methods inherited from class jakarta.faces.component.UIOutput
getConverter, getLocalValue, setConverter
Methods inherited from class jakarta.faces.component.UIComponentBase
addClientBehavior, addFacesListener, encodeAll, encodeBegin, encodeChildren, encodeEnd, findComponent, getAttributes, getChildCount, getChildren, getClientBehaviors, getClientId, getDefaultEventName, getEventNames, getFacesContext, getFacesListeners, getFacet, getFacetCount, getFacets, getFacetsAndChildren, getId, getParent, getPassThroughAttributes, getRenderer, getRendererType, getRendersChildren, invokeOnComponent, isRendered, isTransient, processRestoreState, processSaveState, queueEvent, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, visitTree
Methods inherited from class jakarta.faces.component.UIComponent
getClientId, getCompositeComponentParent, getContainerClientId, getCurrentComponent, getCurrentCompositeComponent, getListenersForEventClass, getNamingContainer, getPassThroughAttributes, getResourceBundleMap, getStateHelper, getStateHelper, getTransientStateHelper, getTransientStateHelper, getValueExpression, initialStateMarked, isCompositeComponent, isInView, isVisitable, popComponentFromEL, processEvent, pushComponentToEL, restoreTransientState, saveTransientState, setInView, setValueExpression, subscribeToEvent, unsubscribeFromEvent
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface jakarta.faces.component.ValueHolder
getConverter, getLocalValue, setConverter
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Field Details
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COMPONENT_TYPE
- See Also:
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COMPONENT_FAMILY
- See Also:
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CONVERSION_MESSAGE_ID
- See Also:
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REQUIRED_MESSAGE_ID
- See Also:
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UPDATE_MESSAGE_ID
- See Also:
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VALIDATE_EMPTY_FIELDS_PARAM_NAME
@JSFWebConfigParam(defaultValue="auto", expectedValues="auto, true, false", since="2.0", group="validation") public static final String VALIDATE_EMPTY_FIELDS_PARAM_NAMEForce validation on empty fields (By default is auto, which means it is only enabled when Bean Validation binaries are available on the current classpath).- See Also:
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EMPTY_STRING_AS_NULL_PARAM_NAME
@JSFWebConfigParam(defaultValue="false", expectedValues="true, false", since="2.0", group="validation") public static final String EMPTY_STRING_AS_NULL_PARAM_NAMESubmitted values are decoded as null values instead empty strings.Note this param is ignored for components extending from UISelectOne/UISelectMany.
- See Also:
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ALWAYS_PERFORM_VALIDATION_WHEN_REQUIRED_IS_TRUE
@JSFWebConfigParam(defaultValue="false", expectedValues="true, false", since="2.3", group="validation") public static final String ALWAYS_PERFORM_VALIDATION_WHEN_REQUIRED_IS_TRUEIf set to true, validation is always performed when required is true.- See Also:
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Constructor Details
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UIInput
public UIInput()Construct an instance of the UIInput.
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Method Details
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getFamily
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setValue
Store the specified object as the "local value" of this component. The value-binding named "value" (if any) is ignored; the object is only stored locally on this component. During the "update model" phase, if there is a value-binding named "value" then this local value will be stored via that value-binding and the "local value" reset to null.- Specified by:
setValue
in interfaceValueHolder
- Overrides:
setValue
in classUIOutput
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getValue
Return the current value of this component.If a submitted value has been converted but not yet pushed into the model, then return that locally-cached value (see isLocalValueSet).
Otherwise, evaluate an EL expression to fetch a value from the model.- Specified by:
getValue
in interfaceValueHolder
- Overrides:
getValue
in classUIOutput
- Returns:
- the new value value
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processDecodes
Set the "submitted value" of this component from the relevant data in the current servlet request object.If this component is not rendered, then do nothing; no output would have been sent to the client so no input is expected.
Invoke the inherited functionality, which typically invokes the renderer associated with this component to extract and set this component's "submitted value".
If this component is marked "immediate", then immediately apply validation to the submitted value found. On error, call context method "renderResponse" which will force processing to leap to the "render response" phase as soon as the "decode" step has completed for all other components.
- Overrides:
processDecodes
in classUIComponentBase
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processValidators
- Overrides:
processValidators
in classUIComponentBase
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processUpdates
Description copied from class:UIComponentBase
This isn't an input component, so just pass on the processUpdates call to child components and facets that might be input components.Components that were never rendered can't possibly be receiving update data (no corresponding fields were ever put into the response) so if this component is not rendered then this method does not invoke processUpdates on its children.
- Overrides:
processUpdates
in classUIComponentBase
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decode
Description copied from class:UIComponentBase
Check the submitted form parameters for data associated with this component. This default implementation delegates to this component's renderer if there is one, and otherwise ignores the call.- Overrides:
decode
in classUIComponentBase
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broadcast
Description copied from class:UIComponentBase
Invoke any listeners attached to this object which are listening for an event whose type matches the specified event's runtime type.This method does not propagate the event up to parent components, ie listeners attached to parent components don't automatically get called.
If any of the listeners throws AbortProcessingException then that exception will prevent any further listener callbacks from occurring, and the exception propagates out of this method without alteration.
ActionEvent events are typically queued by the renderer associated with this component in its decode method; ValueChangeEvent events by the component's validate method. In either case the event's source property references a component. At some later time the UIViewRoot component iterates over its queued events and invokes the broadcast method on each event's source object.
- Overrides:
broadcast
in classUIComponentBase
- Parameters:
event
- must not be null.- Throws:
AbortProcessingException
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updateModel
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validateValue
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validate
Determine whether the new value is valid, and queue a ValueChangeEvent if necessary.The "submitted value" is converted to the necessary type; conversion failure is reported as an error and validation processing terminates for this component. See documentation for method getConvertedValue for details on the conversion process.
Any validators attached to this component are then run, passing the converted value.
The old value of this component is then fetched (possibly involving the evaluation of a value-binding expression, ie invoking a method on a user object). The old value is compared to the new validated value, and if they are different then a ValueChangeEvent is queued for later processing.
On successful completion of this method:
- isValid() is true
- isLocalValueSet() is true
- submittedValue is reset to null
- a ValueChangeEvent is queued if the new value != old value
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getConvertedValue
protected Object getConvertedValue(FacesContext context, Object submittedValue) throws ConverterException Convert the provided object to the desired value.If there is a renderer for this component, then call the renderer's getConvertedValue method. While this can of course be implemented in any way the renderer desires, it typically performs exactly the same processing that this method would have done anyway (ie that described below for the no-renderer case).
Otherwise:
- If the submittedValue is not a String then just return the submittedValue unconverted.
- If there is no "value" value-binding then just return the submittedValue unconverted.
- Use introspection to determine the type of the target property specified by the value-binding, and then use Application.createConverter to find a converter that can map from String to the required type. Apply the converter to the submittedValue and return the result.
- Throws:
ConverterException
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compareValues
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resetValue
public void resetValue()Description copied from interface:EditableValueHolder
Convenience method to reset this component's value to an uninitialized state, by resetting the local value and submitted values to null (ensuring thatEditableValueHolder.isLocalValueSet()
is false), and setting "valid" to true.- Specified by:
resetValue
in interfaceEditableValueHolder
- Overrides:
resetValue
in classUIOutput
- Since:
- 1.2
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isImmediate
@JSFProperty public boolean isImmediate()A boolean value that identifies the phase during which action events should fire.During normal event processing, action methods and action listener methods are fired during the "invoke application" phase of request processing. If this attribute is set to "true", these methods are fired instead at the end of the "apply request values" phase.
- Specified by:
isImmediate
in interfaceEditableValueHolder
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setImmediate
public void setImmediate(boolean immediate) - Specified by:
setImmediate
in interfaceEditableValueHolder
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isRequired
@JSFProperty(defaultValue="false") public boolean isRequired()A boolean value that indicates whether an input value is required.If this value is true and no input value is provided by a postback operation, then the "requiredMessage" text is registered as a FacesMessage for the request, and validation fails.
Default value: false.
- Specified by:
isRequired
in interfaceEditableValueHolder
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setRequired
public void setRequired(boolean required) Description copied from interface:EditableValueHolder
Set to true to cause validation failure when a form containing this component is submitted and there is no value selected for this component.- Specified by:
setRequired
in interfaceEditableValueHolder
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getConverterMessage
Text to be displayed to the user as an error message when conversion of a submitted value to the target type fails. -
setConverterMessage
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getRequiredMessage
Text to be displayed to the user as an error message when this component is marked as "required" but no input data is present during a postback (ie the user left the required field blank). -
setRequiredMessage
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addValidator
See getValidator.- Specified by:
addValidator
in interfaceEditableValueHolder
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removeValidator
See getValidator.- Specified by:
removeValidator
in interfaceEditableValueHolder
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getValidators
See getValidator.- Specified by:
getValidators
in interfaceEditableValueHolder
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getValidatorMessage
Text which will be shown if validation fails. -
setValidatorMessage
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isValid
@JSFProperty(defaultValue="true", tagExcluded=true) public boolean isValid()Specifies whether the component's value is currently valid, ie whether the validators attached to this component have allowed it.- Specified by:
isValid
in interfaceEditableValueHolder
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setValid
public void setValid(boolean valid) - Specified by:
setValid
in interfaceEditableValueHolder
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isLocalValueSet
@JSFProperty(defaultValue="false", tagExcluded=true) public boolean isLocalValueSet()Specifies whether a local value is currently set.If false, values are being retrieved from any attached ValueBinding.
- Specified by:
isLocalValueSet
in interfaceEditableValueHolder
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setLocalValueSet
public void setLocalValueSet(boolean localValueSet) Description copied from interface:EditableValueHolder
Specify the return value of method isLocalValueSet. This is called after the local value member has been set from the converted and validated "submitted value". It is cleared after that value has been pushed to the user model via the value-binding named "value".- Specified by:
setLocalValueSet
in interfaceEditableValueHolder
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getSubmittedValue
Gets the current submitted value. This value, if non-null, is set by the Renderer to store a possibly invalid value for later conversion or redisplay, and has not yet been converted into the proper type for this component instance. This method should only be used by the decode() and validate() method of this component, or its corresponding Renderer; however, user code may manually set it to null to erase any submitted value.- Specified by:
getSubmittedValue
in interfaceEditableValueHolder
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setSubmittedValue
Description copied from interface:EditableValueHolder
Invoked during the "decode" phase of processing to inform this component what data was received from the user.In many cases the submitted value is a plain string extracted from the current servlet request object.
In cases where a component is rendered as multiple input components (eg a calendar control with separate day/month/year fields), the submittedValue may be some custom object wrapping the data. However the provided object must be able to represent all possible user input values, not just valid ones.
- Specified by:
setSubmittedValue
in interfaceEditableValueHolder
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addValueChangeListener
- Specified by:
addValueChangeListener
in interfaceEditableValueHolder
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removeValueChangeListener
- Specified by:
removeValueChangeListener
in interfaceEditableValueHolder
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getValueChangeListeners
@JSFListener(event="jakarta.faces.event.ValueChangeEvent") public ValueChangeListener[] getValueChangeListeners()The valueChange event is delivered when the value attribute is changed.- Specified by:
getValueChangeListeners
in interfaceEditableValueHolder
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markInitialState
public void markInitialState()- Specified by:
markInitialState
in interfacePartialStateHolder
- Overrides:
markInitialState
in classUIOutput
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clearInitialState
public void clearInitialState()Description copied from class:UIComponent
- Specified by:
clearInitialState
in interfacePartialStateHolder
- Overrides:
clearInitialState
in classUIOutput
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saveState
Description copied from class:UIComponentBase
Invoked after the render phase has completed, this method returns an object which can be passed to the restoreState of some other instance of UIComponentBase to reset that object's state to the same values as this object currently has.- Specified by:
saveState
in interfaceStateHolder
- Overrides:
saveState
in classUIOutput
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restoreState
Description copied from class:UIComponentBase
Invoked in the "restore view" phase, this initialises this object's members from the values saved previously into the provided state object.- Specified by:
restoreState
in interfaceStateHolder
- Overrides:
restoreState
in classUIOutput
state
- is an object previously returned by the saveState method of this class.
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isEmpty
Check if a value is empty or not. Since we don't know the class of value we have to check and deal with it properly.- Parameters:
value
-- Returns:
- Since:
- 2.0
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