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 javax.faces.component.html.HtmlInputText in the view.
HtmlImputText has a number of attributes that are to be exposed
to the page author. HtmlInputText also implements
javax.faces.component.EditableValueHolder, which extends
javax.faces.component.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 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.
| Modifier and Type | Field and Description |
|---|---|
| private Class | lastType
Stores the last type. |
| private Metadata | mapper
Stores the mapper. |
| Access | Constructor and Description |
|---|---|
| public |
| Modifier and Type | Method and Description |
|---|---|
| protected abstract MetaRuleset | Returns: theMetaRuleset.the type. type)Extend this method in order to add your own rules. |
| protected void | setAttributes(FaceletContext
the Facelet context. ctx, Object the instance. instance)Invoking/extending this method will cause the results of the created MetaRuleset to auto-wire state to the passed instance. |
| lastType | back to summary |
|---|---|
| private Class<T> lastType Stores the last type. | |
| mapper | back to summary |
|---|---|
| private Metadata mapper Stores the mapper. | |
| MetaTagHandler | back to summary |
|---|---|
| public MetaTagHandler(TagConfig config) Constructor.
| |
| createMetaRuleset | back to summary |
|---|---|
| protected abstract MetaRuleset createMetaRuleset(Class<T> type) Extend this method in order to add your own rules.
| |
| setAttributes | back to summary |
|---|---|
| protected void setAttributes(FaceletContext ctx, Object instance) Invoking/extending this method will cause the results of the created MetaRuleset to auto-wire state to the passed instance.
| |