javax.faces.view.facelets
Class TagHandler

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

public abstract class TagHandler
extends Object
implements FaceletHandler

Foundation class for FaceletHandlers associated with a markup element in a Facelet document. This class introduces the concept of XML attributes to Facelets. See the constructor documentation for more details.

Since:
2.0

Field Summary
protected  FaceletHandler nextHandler
           
protected  Tag tag
           
protected  String tagId
           
 
Constructor Summary
TagHandler(TagConfig config)
          

Every TagHandler instance is associated with a Tag.

 
Method Summary
protected  TagAttribute getAttribute(String localName)
          Utility method for fetching the appropriate TagAttribute
protected  TagAttribute getRequiredAttribute(String localName)
          Utility method for fetching a required TagAttribute
 String toString()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface javax.faces.view.facelets.FaceletHandler
apply
 

Field Detail

tagId

protected final String tagId

tag

protected final Tag tag

nextHandler

protected final FaceletHandler nextHandler
Constructor Detail

TagHandler

public TagHandler(TagConfig config)

Every TagHandler instance is associated with a Tag. Each Tag instance has a TagAttributes property, which is simply a collection of TagAttribute instances. Extract and save as protected instance variables the TagConfig.getTagId(), TagConfig.getTag() and TagConfig.getNextHandler() returns from the argument TagConfig. This constructor is only called when the Facelets View is compiled.

Parameters:
config - The structure that contains useful to the operation of this instance.
Method Detail

getAttribute

protected final TagAttribute getAttribute(String localName)
Utility method for fetching the appropriate TagAttribute

Parameters:
localName - name of attribute
Returns:
TagAttribute if found, otherwise null

getRequiredAttribute

protected final TagAttribute getRequiredAttribute(String localName)
                                           throws TagException
Utility method for fetching a required TagAttribute

Parameters:
localName - name of the attribute
Returns:
TagAttribute if found, otherwise error
Throws:
TagException - if the attribute was not found

toString

public String toString()
Overrides:
toString in class Object


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