Class AjaxHandler
java.lang.Object
jakarta.faces.view.facelets.TagHandler
org.apache.myfaces.view.facelets.tag.faces.core.AjaxHandler
- All Implemented Interfaces:
AttachedObjectHandler
,BehaviorHolderAttachedObjectHandler
,FaceletHandler
@JSFFaceletTag(name="f:ajax")
public class AjaxHandler
extends TagHandler
implements BehaviorHolderAttachedObjectHandler
This tag creates an instance of AjaxBehavior, and associates it with the nearest
parent UIComponent that implements ClientBehaviorHolder interface. This tag can
be used on single or composite components.
Unless otherwise specified, all attributes accept static values or EL expressions.
According to the documentation, the tag handler implementing this tag should meet the following conditions:
- Since this tag attach objects to UIComponent instances, and those instances implements Behavior interface, this component should implement BehaviorHolderAttachedObjectHandler interface.
- f:ajax does not support binding property. In theory we should do something similar to f:convertDateTime tag does: extends from ConverterHandler and override setAttributes method, but in this case BehaviorTagHandlerDelegate has binding property defined, so if we extend from BehaviorHandler we add binding support to f:ajax.
- This tag works as a attached object handler, but note on the api there is no component to define a target for a behavior. See comment inside apply() method.
- Version:
- $Revision$ $Date$
- Author:
- Leonardo Uribe (latest modification by $Author$)
-
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final Class<?>[]
static final String
Constant used to check if in the current build view it has been rendered the standard jsf javascript library.Fields inherited from class jakarta.faces.view.facelets.TagHandler
nextHandler, tag, tagId
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
apply
(FaceletContext ctx, UIComponent parent) void
applyAttachedObject
(FacesContext context, UIComponent parent) This method should create an AjaxBehavior object and attach it to the parent component.ViewDeclarationLanguage.retargetAttachedObjects uses it to check if the the target to be processed is applicable for this handlergetFor()
The documentation says this attribute should not be used since it is not taken into account.static void
registerFacesJsResource
(FaceletContext ctx, UIComponent parent) protected <T> void
setAttribute
(FaceletContext faceletContext, AjaxBehavior behavior, TagAttribute attr, Class<T> type) protected <T> void
setAttribute
(FaceletContext faceletContext, AjaxBehavior behavior, TagAttribute attr, Class<T> type, Consumer<T> setter) Methods inherited from class jakarta.faces.view.facelets.TagHandler
getAttribute, getRequiredAttribute, toString
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Field Details
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AJAX_BEHAVIOR_LISTENER_SIG
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FACES_JS_DYNAMICALLY_ADDED
Constant used to check if in the current build view it has been rendered the standard jsf javascript library. It is necessary to remove this key from facesContext attribute map after build, to keep working this code for next views to be built.- See Also:
-
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Constructor Details
-
AjaxHandler
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Method Details
-
apply
- Specified by:
apply
in interfaceFaceletHandler
- Throws:
IOException
-
registerFacesJsResource
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getEventName
ViewDeclarationLanguage.retargetAttachedObjects uses it to check if the the target to be processed is applicable for this handler- Specified by:
getEventName
in interfaceBehaviorHolderAttachedObjectHandler
-
applyAttachedObject
This method should create an AjaxBehavior object and attach it to the parent component. Also, it should check if the parent can apply the selected AjaxBehavior to the selected component through ClientBehaviorHolder.getEventNames() or ClientBehaviorHolder.getDefaultEventName()- Specified by:
applyAttachedObject
in interfaceAttachedObjectHandler
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setAttribute
protected <T> void setAttribute(FaceletContext faceletContext, AjaxBehavior behavior, TagAttribute attr, Class<T> type) -
setAttribute
protected <T> void setAttribute(FaceletContext faceletContext, AjaxBehavior behavior, TagAttribute attr, Class<T> type, Consumer<T> setter) -
getFor
The documentation says this attribute should not be used since it is not taken into account. Instead, getEventName is used on ViewDeclarationLanguage.retargetAttachedObjects.- Specified by:
getFor
in interfaceAttachedObjectHandler
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