/*
 * JBoss, Home of Professional Open Source
 * Copyright 2010, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.weld.module.web;

import java.lang.annotation.Annotation;
import java.security.AccessController;

import javax.enterprise.context.RequestScoped;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.servlet.ServletContext;

import org.jboss.weld.bean.builtin.AbstractStaticallyDecorableBuiltInBean;
import org.jboss.weld.module.web.logging.ServletLogger;
import org.jboss.weld.manager.BeanManagerImpl;
import org.jboss.weld.security.GetContextClassLoaderAction;
import org.jboss.weld.module.web.servlet.ServletContextService;

/**
 * Built-in bean exposing {@link ServletContext}.
 *
 * @author Jozef Hartinger
 *
 */
public class ServletContextBean extends AbstractStaticallyDecorableBuiltInBean<ServletContext> {

    private final ServletContextService servletContexts;

    public ServletContextBean(BeanManagerImpl beanManager) {
        super(beanManager, ServletContext.class);
        this.servletContexts = beanManager.getServices().get(ServletContextService.class);
    }

    @Override
    protected ServletContext newInstance(InjectionPoint ip, CreationalContext<ServletContext> creationalContext) {
        final ServletContext ctx = servletContexts.getCurrentServletContext();
        if (ctx == null) {
            final ClassLoader cl = AccessController.doPrivileged(GetContextClassLoaderAction.INSTANCE);
            throw ServletLogger.LOG.cannotInjectServletContext(cl, servletContexts);
        }
        return ctx;
    }

    @Override
    public Class<? extends Annotation> getScope() {
        return RequestScoped.class;
    }
}