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Jakarta Faces defines an MVC framework for building user interfaces for web applications,
including UI components, state management, event handing, input validation, page navigation, and
support for internationalization and accessibility.
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.spi;
import javax.servlet.ServletContext;
import com.sun.faces.config.manager.spi.FilterClassesFromFacesInitializerAnnotationProvider;
import javax.faces.FacesException;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Iterator;
import java.util.ServiceLoader;
/**
*
*/
public class AnnotationProviderFactory {
private static final Class DEFAULT_ANNOTATION_PROVIDER =
FilterClassesFromFacesInitializerAnnotationProvider.class;
private static final String ANNOTATION_PROVIDER_SERVICE_KEY =
"com.sun.faces.spi.annotationprovider";
// ---------------------------------------------------------- Public Methods
public static AnnotationProvider createAnnotationProvider(ServletContext sc) {
AnnotationProvider annotationProvider = createDefaultProvider(sc);
String[] services = ServiceFactoryUtils.getServiceEntries(ANNOTATION_PROVIDER_SERVICE_KEY);
if (services.length > 0) {
// only use the first entry...
Object provider = ServiceFactoryUtils.getProviderFromEntry(services[0],
new Class[] { ServletContext.class, AnnotationProvider.class }, new Object[] { sc , annotationProvider });
if (provider == null) {
provider = ServiceFactoryUtils.getProviderFromEntry(services[0], new Class[] { ServletContext.class }, new Object[] { sc });
}
if (provider != null) {
if (!(provider instanceof AnnotationProvider)) {
throw new FacesException("Class " + provider.getClass().getName() + " is not an instance of com.sun.faces.spi.AnnotationProvider");
}
annotationProvider = (AnnotationProvider)provider;
}
}
else {
ServiceLoader serviceLoader = ServiceLoader.load(AnnotationProvider.class);
Iterator iterator = serviceLoader.iterator();
if (iterator.hasNext()) {
AnnotationProvider defaultAnnotationProvider = annotationProvider;
annotationProvider = (AnnotationProvider) iterator.next();
annotationProvider.initialize(sc, defaultAnnotationProvider);
}
}
return annotationProvider;
}
// --------------------------------------------------------- Private Methods
private static AnnotationProvider createDefaultProvider(ServletContext sc) {
AnnotationProvider result = null;
Constructor c;
try {
c = DEFAULT_ANNOTATION_PROVIDER.getDeclaredConstructor(new Class[] { ServletContext.class });
result = (AnnotationProvider) c.newInstance(sc);
} catch (NoSuchMethodException | SecurityException | InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException e2) {
throw new FacesException(e2);
}
return result;
}
}