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package com.sun.faces.application.annotation;
import java.lang.annotation.Annotation;
/**
* <p>Instances of this interface are responsible for scanning a <code>Class</code>
* for a specific annotation types.</p>
*
* <p>Scanner implementations <em>must</em> be thread safe.</p>
*/
interface Scanner {
/**
* @return the {@link java.lang.annotation.Annotation} this <code>Scanner</code>
* is responsible for handling. <em>NOTE</em>: while a particular <code>Scanner</code>
* instance may handle a plural version of an <code>Annotation</code> in
* additional to a singular, this method must return the singular version
* only.
*/
public Class<? extends Annotation> getAnnotation();
/**
* Scan the target class for the {@link java.lang.annotation.Annotation}s this scanner handles.
* @param clazz the target class
* @return a new {@link RuntimeAnnotationHandler} instance capable of processing the
* annotations defined on this class. If no relevant {@link java.lang.annotation.Annotation}s
* are found, return <code>null</code>.
*/
public RuntimeAnnotationHandler scan(Class<?> clazz);
}