javax.faces.view.facelets
Class MetaTagHandler

java.lang.Object
  extended by javax.faces.view.facelets.TagHandler
      extended by javax.faces.view.facelets.MetaTagHandler
All Implemented Interfaces:
FaceletHandler
Direct Known Subclasses:
DelegatingMetaTagHandler

public abstract class MetaTagHandler
extends TagHandler

Every kind of markup element in Facelets VDL that has attributes that need to take action on a JSF Java API artifact is associated with an instance of this class. This class is an abstraction to enable a rule based method for directing how different kinds of elements take different kinds of actions in the JSF Java API. For example, consider this markup:

<h:inputText value="#{user.userid}" 
                valueChangeListener="#{user.newUserId}" />

This markup element corresponds to an instance of HtmlInputText in the view. HtmlImputText has a number of attributes that are to be exposed to the page author. HtmlInputText also implements EditableValueHolder, which extends ValueHolder. Each of these interfaces also expose a number of attributes to the page author.

Facelets employes the strategy pattern to allow the manner in which all possible attributes are handled based on the nature of the JSF Java API artifact associated with the markup element.

Subclasses override the createMetaRuleset(java.lang.Class) method to return a MetaRuleset instance encapsulating all the strategies for all the attributes that make sense for this particular markup element. The runtime calls the setAttributes(FaceletContext, Object) method to cause those rules to be executed and applied.

Since:
2.0

Constructor Summary
MetaTagHandler(TagConfig config)
           
 
Method Summary
 
Methods inherited from class javax.faces.view.facelets.TagHandler
toString
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface javax.faces.view.facelets.FaceletHandler
apply
 

Constructor Detail

MetaTagHandler

public MetaTagHandler(TagConfig config)