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package javax.faces.view.facelets;
import java.io.IOException;
import javax.faces.component.UIComponent;
/**
* <p class="changed_added_2_0"><span class="changed_modified_2_2">Abstract</span>
* class that defines methods
* relating to helping tag handler instances. This abstraction enables
* implementation details to be hidden by the JSF implementation while
* still allowing concrete classes to be defined for extension by
* users.</p>
*
* @since 2.0
*/
public abstract class TagHandlerDelegate {
/**
* <p class="changed_added_2_0">Return a {@link MetaRuleset}
* particular to this kind of tag handler. Called from classes that
* implement {@link MetaTagHandler}.</p>
*
* @param type the <code>Class</code> for which the
* <code>MetaRuleset</code> must be created.
*
* @return a {@link MetaRuleset} particular to this kind of tag handler.
*
* @since 2.0
*/
public abstract MetaRuleset createMetaRuleset(Class type);
/**
* <p class="changed_added_2_0"><span class="changed_modified_2_2">Called</span>
* by classes that implement
* {@link javax.faces.view.facelets.FaceletHandler} in their
* implementation of <code>apply()</code>.</p>
*
* <p class="changed_added_2_2">If the argument {@code comp} is new to the
* view, for each tag attribute declared to be in the pass through attribute
* namespace, set the name and value of the attribute into the pass through
* attributes map of the component. See {@link UIComponent#getPassThroughAttributes(boolean) }.
* See the VDLDocs for the namespace URI of the pass through attribute
* namespace. Attributes whose value is a {@code ValueExpression}
* must remain un-evaluated and stored in the map as {@code ValueExpression} instances.</p>
*
* @param ctx the <code>FaceletContext</code> for this request
*
* @param comp the <code>UIComponent</code> that corresponds to this
* element.
*
* @throws IOException if any files necessary to apply this tag handler
* have any difficulty while loading
*
*/
public abstract void apply(FaceletContext ctx, UIComponent comp)
throws IOException;
}