public class InputHidden extends HtmlInputHidden
The <o:inputHidden> is a component that extends the standard <h:inputHidden>
and changes the behavior to immediately convert, validate and update during apply request values phase, regardless of
any conversion/validation errors on other UIInput components within the same form. The standard
<h:inputHidden> follows the same lifecycle as other UIInput components which is in
the end unintuive as hidden input fields are usually under control of the developer.
Use case 1: Imagine a form with a <h:inputHidden> and a <h:inputText>. The
hidden input holds some prepopulated value of a request scoped bean which is intended to be passed through to the
request scoped bean instance of the next request. However, when conversion/validation fails on the text input, then
the hidden input won't update the bean property and then becomes empty. I.e. the original value gets permanently lost.
This can be bypassed by using ajax to update only specific fields, but this will fail when the update of the hidden
input is actually needed (e.g. because the value can possibly be adjusted in action/listener method).
Use case 2: Imagine a form with an UIInput or UICommand component whose
rendered attribute relies on a request scoped bean property which is retained for the next request
through a <h:inputHidden>. However, when JSF needs to decode the UIInput or
UICommand component during the postback, the rendered attribute has defaulted back to
false because the <h:inputHidden> hasn't yet updated the request scoped bean property
yet.
This behavior cannot be achieved by using immediate="true" on <h:inputHidden>. It
would only move the conversion/validation into the apply request values phase. The model still won't be updated on
time.
You can use it the same way as <h:inputHidden>, you only need to change h: into
o: to get the "immediate v2.0" behavior.
<h:form>
<o:inputHidden value="#{bean.hidden}" />
...
</h:form>
When using ajax, don't forget to make sure that the component is also covered by the execute attribute.
HtmlInputHidden.PropertyKeys| Modifier and Type | Field and Description |
|---|---|
static String |
COMPONENT_TYPE |
ALWAYS_PERFORM_VALIDATION_WHEN_REQUIRED_IS_TRUE, COMPONENT_FAMILY, CONVERSION_MESSAGE_ID, EMPTY_STRING_AS_NULL_PARAM_NAME, REQUIRED_MESSAGE_ID, UPDATE_MESSAGE_ID, VALIDATE_EMPTY_FIELDS_PARAM_NAMEATTRS_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 and Description |
|---|
InputHidden() |
| Modifier and Type | Method and Description |
|---|---|
void |
decode(FacesContext context)
This override performs decode, validate and update at once.
|
void |
processUpdates(FacesContext context)
This override which does effectively nothing prevents JSF from performing update for second time.
|
void |
processValidators(FacesContext context)
This override which does effectively nothing prevents JSF from performing validation for second time.
|
addValidator, addValueChangeListener, clearInitialState, compareValues, getConvertedValue, getConverterMessage, getFamily, getRequiredMessage, getSubmittedValue, getValidator, getValidatorMessage, getValidators, getValue, getValueChangeListener, getValueChangeListeners, isEmpty, isImmediate, isLocalValueSet, isRequired, isValid, markInitialState, processDecodes, removeValidator, removeValueChangeListener, resetValue, restoreState, saveState, setConverterMessage, setImmediate, setLocalValueSet, setRequired, setRequiredMessage, setSubmittedValue, setValid, setValidator, setValidatorMessage, setValue, setValueChangeListener, updateModel, validate, validateValuegetConverter, getLocalValue, setConverteraddClientBehavior, 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, unsubscribeFromEventencodeAll, getClientId, getCompositeComponentParent, getContainerClientId, getCurrentComponent, getCurrentCompositeComponent, getNamingContainer, getPassThroughAttributes, getResourceBundleMap, getStateHelper, getStateHelper, getTransientStateHelper, getTransientStateHelper, getValueExpression, initialStateMarked, isCompositeComponent, isInView, isVisitable, popComponentFromEL, processEvent, pushComponentToEL, restoreTransientState, saveTransientState, setInView, setValueExpression, visitTreeclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetConverter, getLocalValue, setConverterpublic static final String COMPONENT_TYPE
public void decode(FacesContext context)
public void processValidators(FacesContext context)
processValidators in class UIInputpublic void processUpdates(FacesContext context)
processUpdates in class UIInputCopyright © 2012–2020 OmniFaces. All rights reserved.