/*
 * Copyright 2013-2014 the original author or authors.
 *
 * 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.springframework.security.oauth.examples.config;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;

import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.filter.DelegatingFilterProxy;
import org.springframework.web.servlet.support.AbstractDispatcherServletInitializer;

/**
 * @author Dave Syer
 * 
 */
public class ServletInitializer extends AbstractDispatcherServletInitializer {

	@Override
	protected WebApplicationContext createServletApplicationContext() {
		AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
		context.register(SecurityConfig.class, WebMvcConfig.class);
		return context;
	}

	@Override
	protected String[] getServletMappings() {
		return new String[] { "/" };
	}

	@Override
	protected WebApplicationContext createRootApplicationContext() {
		return null;
	}

	@Override
	public void onStartup(ServletContext servletContext) throws ServletException {
		super.onStartup(servletContext);
		registerProxyFilter(servletContext, "springSecurityFilterChain");
		registerProxyFilter(servletContext, "oauth2ClientContextFilter");
	}

	private void registerProxyFilter(ServletContext servletContext, String name) {
		DelegatingFilterProxy filter = new DelegatingFilterProxy(name);
		filter.setContextAttribute("org.springframework.web.servlet.FrameworkServlet.CONTEXT.dispatcher");
		servletContext.addFilter(name, filter).addMappingForUrlPatterns(null, false, "/*");
	}

}