com.sun.faces.spi.AnnotationProviderFactory Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.faces.spi;
import com.sun.faces.config.DelegatingAnnotationProvider;
import javax.servlet.ServletContext;
import javax.faces.FacesException;
import java.lang.reflect.Constructor;
import java.util.Iterator;
import java.util.ServiceLoader;
/**
*
*/
public class AnnotationProviderFactory {
private static final Class DEFAULT_ANNOTATION_PROVIDER =
DelegatingAnnotationProvider.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 (Exception e2) {
throw new FacesException(e2);
}
return result;
}
}