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package com.sun.faces.spi;
import javax.servlet.ServletContext;
import java.lang.annotation.Annotation;
import java.net.URI;
import java.util.Set;
import java.util.Map;
/**
*
* An integration point for integrators to provide custom annotation scanning.
*
*
*
* All AnnotationProvider implementations must
* scan for the following annotations:
*
*
* - FacesComponent
* - FacesConverter
* - FacesRenderer
* - FacesValidator
* - ManagedBean
* - NamedEvent
* - FacesBehavior
* - FacesBehaviorRenderer
*
*
*
* The AnnotationProvider instance will be wrapped as a {@link java.util.concurrent.Future} and
* executed during the environment initialization. The result of the future can be obtained
* by calling {@link com.sun.faces.config.ConfigManager#getAnnotatedClasses(javax.faces.context.FacesContext)}.
*
*
*
* The {@link java.util.concurrent.Future} itself can be obtained from the
* application map using the key com.sun.faces.config.ConfigManager__ANNOTATION_SCAN_TASK.
*
*
*
* It's important to note that the value returned by either method described above
* is only available while the application is being initialized and will be removed
* before the application is put into service.
*
*
*
* To register a custom AnnotationProvider with the runtime, place a file named
* com.sun.faces.spi.annotationprovider within META-INF/services of a JAR file,
* with a single line referencing the fully qualified class name of the AnnotationProvider
* implementation. Custom AnnotationProviders can be used to decorate the default
* AnnotationProvider by providing a constructor that takes an AnnotationProvider as the
* second parameter:
*
* public AnnotationProvider(ServletContext sc, AnnotationProvider parent)
*
* If decoration is not desired, then the custom provider must have a constructor
* that takes one paramer, a ServletContext:
*
*
public AnnotationProvider(ServletContext sc)
*
* All customer providers must extend this class.
*
*/
public abstract class AnnotationProvider {
protected ServletContext sc;
/**
* The wrapped annotation provider. May be null if this class is not loaded via {@link ServiceLoader} (from a file
* named com.sun.faces.spi.AnnotationProvider) and is instead loaded via Mojarra's {@link ServiceFactory} (from a
* file named com.sun.faces.spi.annotationprovider).
*/
protected AnnotationProvider wrappedAnnotationProvider;
// ------------------------------------------------------------ Constructors
public AnnotationProvider() {
}
public AnnotationProvider(ServletContext sc) {
initialize(sc, null);
}
// ---------------------------------------------------------- Package Methods
final void initialize(ServletContext sc, AnnotationProvider wrappedAnnotationProvider) {
if (this.sc == null) {
this.sc = sc;
}
if (this.wrappedAnnotationProvider == null) {
this.wrappedAnnotationProvider = wrappedAnnotationProvider;
}
}
// ---------------------------------------------------------- Public Methods
/**
* @param urls a Set of URLs that refer to specific faces-config.xml
* documents on the classpath. The information returned by the map may
* return annotation information from sources outside of those defined by the
* urls.
* @return a Map of classes mapped to a specific annotation type.
* If no annotations are present, this method returns an empty Map.
*/
public abstract Map,Set>> getAnnotatedClasses(Set urls);
} // END AnnotationProvider