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 StringIf set to true, validation is always performed when required is true.static final Stringstatic final Stringstatic final Stringstatic final StringSubmitted values are decoded as null values instead empty strings.static final Stringstatic final Stringstatic final StringForce 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 -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoidaddValidator(Validator validator) See getValidator.voidaddValueChangeListener(ValueChangeListener listener) voidbroadcast(FacesEvent event) Invoke any listeners attached to this object which are listening for an event whose type matches the specified event's runtime type.voidprotected booleancompareValues(Object previous, Object value) voiddecode(FacesContext context) Check the submitted form parameters for data associated with this component.protected ObjectgetConvertedValue(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 booleanCheck if a value is empty or not.booleanA boolean value that identifies the phase during which action events should fire.booleanSpecifies whether a local value is currently set.booleanA boolean value that indicates whether an input value is required.booleanisValid()Specifies whether the component's value is currently valid, ie whether the validators attached to this component have allowed it.voidvoidprocessDecodes(FacesContext context) Set the "submitted value" of this component from the relevant data in the current servlet request object.voidprocessUpdates(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.voidprocessValidators(FacesContext context) voidremoveValidator(Validator validator) See getValidator.voidremoveValueChangeListener(ValueChangeListener listener) voidConvenience 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.voidrestoreState(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.voidsetConverterMessage(String converterMessage) voidsetImmediate(boolean immediate) voidsetLocalValueSet(boolean localValueSet) Specify the return value of method isLocalValueSet.voidsetRequired(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.voidsetRequiredMessage(String requiredMessage) voidsetSubmittedValue(Object submittedValue) Invoked during the "decode" phase of processing to inform this component what data was received from the user.voidsetValid(boolean valid) voidsetValidatorMessage(String validatorMessage) voidStore the specified object as the "local value" of this component.voidupdateModel(FacesContext context) voidvalidate(FacesContext context) Determine whether the new value is valid, and queue a ValueChangeEvent if necessary.protected voidvalidateValue(FacesContext context, Object convertedValue) Methods inherited from class jakarta.faces.component.UIOutput
getConverter, getLocalValue, setConverterMethods 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, visitTreeMethods 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, unsubscribeFromEventMethods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface jakarta.faces.component.ValueHolder
getConverter, getLocalValue, setConverter
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Field Details
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COMPONENT_TYPE
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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
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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:
setValuein interfaceValueHolder- Overrides:
setValuein 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:
getValuein interfaceValueHolder- Overrides:
getValuein 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:
processDecodesin classUIComponentBase
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processValidators
- Overrides:
processValidatorsin classUIComponentBase
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processUpdates
Description copied from class:UIComponentBaseThis 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:
processUpdatesin classUIComponentBase
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decode
Description copied from class:UIComponentBaseCheck 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:
decodein classUIComponentBase
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broadcast
Description copied from class:UIComponentBaseInvoke 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:
broadcastin 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:EditableValueHolderConvenience 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:
resetValuein interfaceEditableValueHolder- Overrides:
resetValuein 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:
isImmediatein interfaceEditableValueHolder
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setImmediate
public void setImmediate(boolean immediate) - Specified by:
setImmediatein 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:
isRequiredin interfaceEditableValueHolder
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setRequired
public void setRequired(boolean required) Description copied from interface:EditableValueHolderSet 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:
setRequiredin 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:
addValidatorin interfaceEditableValueHolder
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removeValidator
See getValidator.- Specified by:
removeValidatorin interfaceEditableValueHolder
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getValidators
See getValidator.- Specified by:
getValidatorsin 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:
isValidin interfaceEditableValueHolder
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setValid
public void setValid(boolean valid) - Specified by:
setValidin 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:
isLocalValueSetin interfaceEditableValueHolder
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setLocalValueSet
public void setLocalValueSet(boolean localValueSet) Description copied from interface:EditableValueHolderSpecify 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:
setLocalValueSetin 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:
getSubmittedValuein interfaceEditableValueHolder
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setSubmittedValue
Description copied from interface:EditableValueHolderInvoked 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:
setSubmittedValuein interfaceEditableValueHolder
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addValueChangeListener
- Specified by:
addValueChangeListenerin interfaceEditableValueHolder
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removeValueChangeListener
- Specified by:
removeValueChangeListenerin 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:
getValueChangeListenersin interfaceEditableValueHolder
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markInitialState
public void markInitialState()- Specified by:
markInitialStatein interfacePartialStateHolder- Overrides:
markInitialStatein classUIOutput
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clearInitialState
public void clearInitialState()Description copied from class:UIComponent- Specified by:
clearInitialStatein interfacePartialStateHolder- Overrides:
clearInitialStatein classUIOutput
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saveState
Description copied from class:UIComponentBaseInvoked 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:
saveStatein interfaceStateHolder- Overrides:
saveStatein classUIOutput
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restoreState
Description copied from class:UIComponentBaseInvoked in the "restore view" phase, this initialises this object's members from the values saved previously into the provided state object.- Specified by:
restoreStatein interfaceStateHolder- Overrides:
restoreStatein classUIOutputstate- 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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