/*
* ============================================================================
* GNU Lesser General Public License
* ============================================================================
*
* Beanlet - JSE Application Container.
* Copyright (C) 2006 Leon van Zantvoort
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* Leon van Zantvoort
* 243 Acalanes Drive #11
* Sunnyvale, CA 94086
* USA
*
* zantvoort@users.sourceforge.net
* http://beanlet.org
*/
package org.beanlet.web.impl;
import org.beanlet.BeanletCreationException;
import org.beanlet.annotation.AnnotationDomain;
import org.beanlet.annotation.TypeElement;
import org.beanlet.common.AbstractProvider;
import org.beanlet.plugin.BeanletConfiguration;
import org.beanlet.web.WebServlet;
import org.jargo.ComponentConfiguration;
import org.jargo.ComponentCreationException;
import org.jargo.ObjectFactory;
import org.jargo.ProxyGenerator;
import org.jargo.deploy.SequentialDeployable;
import org.jargo.spi.ObjectFactoryProvider;
import javax.servlet.Servlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import java.lang.reflect.Constructor;
/**
*
* @author Leon van Zantvoort
*/
public final class WebServletObjectFactoryProviderImpl extends AbstractProvider
implements ObjectFactoryProvider {
public Sequence sequence(SequentialDeployable deployable) {
return Sequence.BEFORE;
}
public <T> ObjectFactory<T> getObjectFactory(
final ComponentConfiguration<T> configuration) {
final ObjectFactory<T> factory;
if (WebConstants.isWebServletSupported()) {
if (configuration instanceof BeanletConfiguration) {
AnnotationDomain domain = ((BeanletConfiguration<?>) configuration).getAnnotationDomain();
final TypeElement typeElement = TypeElement.instance(configuration.getType());
final WebServlet annotation = domain.getDeclaration(
WebServlet.class).getAnnotation(typeElement);
if (annotation != null && annotation.createServlet()) {
Constructor<?> c = null;
try {
c = configuration.getType().getConstructor();
} catch (NoSuchMethodException e) {
}
final Constructor<?> constructor = c;
if (constructor == null) {
throw new BeanletCreationException(configuration.getComponentName(),
"WebServlet MUST have a public zero-argument constructor.");
}
final ServletContext servletContext = WebHelper.getServletContext();
assert servletContext != null;
factory = new ObjectFactory<T>() {
@SuppressWarnings("unchecked")
public T newInstance() throws ComponentCreationException {
Class<Servlet> cls = (Class<Servlet>) typeElement.getType();
try {
return (T) servletContext.createServlet(cls);
} catch (ServletException e) {
throw new ComponentCreationException(configuration.getComponentName(), e);
}
}
public T newInstance(ProxyGenerator<T> proxyGenerator) throws ComponentCreationException {
return proxyGenerator.generateProxy(new Class[0]);
}
};
} else {
factory = null;
}
} else {
factory = null;
}
} else {
factory = null;
}
return factory;
}
}