javax.faces.view.facelets

Class ComponentHandler

java.lang.Object

javax.faces.view.facelets.TagHandler

javax.faces.view.facelets.MetaTagHandler

javax.faces.view.facelets.DelegatingMetaTagHandler

javax.faces.view.facelets.ComponentHandler

All Implemented Interfaces:

FaceletHandler

public class ComponentHandler
extends DelegatingMetaTagHandler

Public base class for markup element instances that map to UIComponent instances in the view.

The implementation must guarantee that the apply() method is overridden and takes the following actions, in this order. These actions must only happen the first time this facelet is applied for each user. Subsequent applications must take no action.

1. The UIComponent represented by this element is created with the appropriate Application.createComponent() method.

2. Each attribute specified in the markup is correctly applied to the component instance, as specified in the VDLDocs for this element.

3. If project stage is #ProjectStage.Development, Put the Location for this element into the component attribute Map under the key given by the value of the symbolic constant javax.faces.component.UIComponent#VIEW_LOCATION_KEY.

4. Set the id of the component. If the id is specified manually by the page author, that value must be set as the id. Otherwise, the closest ancestor component that is an instance of UniqueIdVendor must be located and its UniqueIdVendor.createUniqueId(javax.faces.context.FacesContext, java.lang.String) method must be called to derive the id. If no such instance can be found, call UIViewRoot.createUniqueId() to derive the id.

5. The rendererType property of the component is set properly.

6. onComponentCreated(javax.faces.view.facelets.FaceletContext, javax.faces.component.UIComponent, javax.faces.component.UIComponent) is called.

7. UIComponent#pushComponentToEL is called on the newly created component.

8. The next handler in the facelet chain is applied. This will cause the component to be populated with children.

9. The component is added to its parent in the view.

10. UIComponent#popComponentFromEL is called on the newly created component.

11. Call UIComponent#markInitialState.

Since:

2.0

Field Summary

Fields inherited from class javax.faces.view.facelets.DelegatingMetaTagHandler

delegateFactory

Fields inherited from class javax.faces.view.facelets.TagHandler

nextHandler, tag, tagId

Constructor Summary

Constructors

Constructor and Description
ComponentHandler(ComponentConfig config) Leverage the TagHandlerDelegateFactory provided by the implementation to create an instance of TagHandlerDelegate designed for use with ComponentHandler.

Method Summary

Methods

Modifier and Type	Method and Description
ComponentConfig	getComponentConfig()
protected TagHandlerDelegate	getTagHandlerDelegate()
static boolean	isNew(UIComponent component) Determine if the passed component is not null and if it's new to the tree.
void	onComponentCreated(FaceletContext ctx, UIComponent c, UIComponent parent) This method is guaranteed to be called after the component has been created but before it has been populated with children.
void	onComponentPopulated(FaceletContext ctx, UIComponent c, UIComponent parent) This method is guaranteed to be called after the component has been populated with children.

Methods inherited from class javax.faces.view.facelets.DelegatingMetaTagHandler

apply, applyNextHandler, createMetaRuleset, getBinding, getTag, getTagAttribute, getTagId, isDisabled, setAttributes

Methods inherited from class javax.faces.view.facelets.TagHandler

getAttribute, getRequiredAttribute, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ComponentHandler

public ComponentHandler(ComponentConfig config)

Leverage the TagHandlerDelegateFactory provided by the implementation to create an instance of TagHandlerDelegate designed for use with ComponentHandler.

Since:

2.0

Method Detail

getTagHandlerDelegate

protected TagHandlerDelegate getTagHandlerDelegate()

Specified by:

getTagHandlerDelegate in class DelegatingMetaTagHandler

getComponentConfig

public ComponentConfig getComponentConfig()

onComponentCreated

public void onComponentCreated(FaceletContext ctx,
                      UIComponent c,
                      UIComponent parent)

This method is guaranteed to be called after the component has been created but before it has been populated with children.

Parameters:

ctx - the FaceletContext for this view execution

c - the UIComponent that has just been created.

parent - the parent UIComponent of the component represented by this element instance.

Since:

2.0

onComponentPopulated

public void onComponentPopulated(FaceletContext ctx,
                        UIComponent c,
                        UIComponent parent)

This method is guaranteed to be called after the component has been populated with children.

Parameters:

ctx - the FaceletContext for this view execution

c - the UIComponent that has just been populated with children.

parent - the parent UIComponent of the component represented by this element instance.

Since:

2.0

isNew

public static boolean isNew(UIComponent component)

Determine if the passed component is not null and if it's new to the tree. This operation can be used for determining if attributes should be wired to the component.

Parameters:

component - the component you wish to modify

Since:

2.0