/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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.seasar.teeda.core.context.servlet;

 import java.io.IOException;

 import java.io.InputStream;

 import java.net.MalformedURLException;

 import java.net.URL;

 import java.security.Principal;

 import java.util.Enumeration;

 import java.util.Iterator;

 import java.util.Locale;

 import java.util.Map;

 import java.util.Set;

 import javax.faces.context.ExternalContext;

 import javax.faces.internal.EncodeUrlCustomizer;

 import javax.servlet.ServletContext;

 import javax.servlet.ServletRequest;

 import javax.servlet.ServletResponse;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.seasar.framework.container.external.servlet.CookieMap;

 import org.seasar.framework.container.external.servlet.HttpSessionMap;

 import org.seasar.framework.container.external.servlet.ServletApplicationMap;

 import org.seasar.framework.container.external.servlet.ServletInitParameterMap;

 import org.seasar.framework.container.external.servlet.ServletRequestHeaderMap;

 import org.seasar.framework.container.external.servlet.ServletRequestHeaderValuesMap;

 import org.seasar.framework.container.external.servlet.ServletRequestMap;

 import org.seasar.framework.container.external.servlet.ServletRequestParameterMap;

 import org.seasar.framework.container.external.servlet.ServletRequestParameterValuesMap;

 import org.seasar.framework.log.Logger;

 import org.seasar.framework.util.AssertionUtil;

 import org.seasar.teeda.core.context.Releaseable;

 import org.seasar.teeda.core.scope.impl.DispatchScopeFactory;

 import org.seasar.teeda.core.util.ServletExternalContextUtil;

 /**

  * @author shot

  */

 public class ServletExternalContextImpl extends ExternalContext implements

         Releaseable {

     private static Logger logger = Logger

             .getLogger(ServletExternalContextImpl.class);

     private ServletContext context;

     private ServletRequest request;

     private ServletResponse response;

     private String servletPath = null;

     private String pathInfo = null;

     private boolean isHttpServletRequest = false;

     private boolean isHttpServletResponse = false;

     private Map applicationMap = null;

     private Map initParameterMap = null;

     private Map sessionMap = null;

     private Map requestCookieMap = null;

     private Map requestParameterMap = null;

     private Map requestParameterValuesMap = null;

     private Map requestMap = null;

     private Map requestHeaderMap = null;

     private Map requestHeaderValuesMap = null;

     private EncodeUrlCustomizer customizer = null;

     public ServletExternalContextImpl(final ServletContext context,

             final ServletRequest request, final ServletResponse response) {

         this.context = context;

         this.request = request;

         this.response = response;

         this.isHttpServletRequest = ServletExternalContextUtil

                 .isHttpServletRequest(this.request);

         this.isHttpServletResponse = ServletExternalContextUtil

                 .isHttpServletResponse(this.response);

         ServletExternalContextUtil.setCharacterEncoding(this.request);

         if (isHttpServletRequest) {

             HttpServletRequest httpServletRequest = (HttpServletRequest) request;

             this.servletPath = httpServletRequest.getServletPath();

             this.pathInfo = httpServletRequest.getPathInfo();

         }

     }

     public void dispatch(String path) throws IOException {

         try {

             ServletExternalContextUtil.dispatch(path, request, response);

         } finally {

             DispatchScopeFactory.destroy();

         }

     }

     public String encodeActionURL(String url) {

         assertHttpServletResponse();

         final String encodedUrl = customizer.encodeActionUrl(this, url);

         HttpServletResponse httpResponse = (HttpServletResponse) response;

         if (((HttpServletRequest) request).isRequestedSessionIdFromCookie()) {

             return encodedUrl;

         }

         return httpResponse.encodeURL(encodedUrl);

     }

     public String encodeNamespace(final String name) {

         AssertionUtil.assertNotNull("name is null.", name);

         return name;

     }

     public String encodeResourceURL(final String url) {

         assertHttpServletResponse();

         final String encodedUrl = customizer.encodeResourceUrl(this, url);

         HttpServletResponse httpResponse = (HttpServletResponse) response;

         if (((HttpServletRequest) request).isRequestedSessionIdFromCookie()) {

             return encodedUrl;

         }

         return httpResponse.encodeURL(encodedUrl);

     }

     public Map getApplicationMap() {

         if (applicationMap == null) {

             applicationMap = new ServletApplicationMap(context);

         }

         return applicationMap;

     }

     public String getAuthType() {

         assertHttpServletRequest();

         HttpServletRequest httpServletRequest = (HttpServletRequest) request;

         return httpServletRequest.getAuthType();

     }

     public Object getContext() {

         return context;

     }

     public String getInitParameter(String name) {

         return context.getInitParameter(name);

     }

     public Map getInitParameterMap() {

         if (initParameterMap == null) {

             initParameterMap = new ServletInitParameterMap(context);

         }

         return initParameterMap;

     }

     public String getRemoteUser() {

         assertHttpServletRequest();

         HttpServletRequest httpRequest = (HttpServletRequest) request;

         return httpRequest.getRemoteUser();

     }

     public Object getRequest() {

         return request;

     }

     public String getRequestContextPath() {

         assertHttpServletRequest();

         HttpServletRequest httpRequest = (HttpServletRequest) request;

         return httpRequest.getContextPath();

     }

     public Map getRequestCookieMap() {

         assertHttpServletRequest();

         if (requestCookieMap == null) {

             requestCookieMap = new CookieMap((HttpServletRequest) request);

         }

         return requestCookieMap;

     }

     public Map getRequestHeaderMap() {

         assertHttpServletRequest();

         if (requestHeaderMap == null) {

             requestHeaderMap = new ServletRequestHeaderMap(

                     (HttpServletRequest) request);

         }

         return requestHeaderMap;

     }

     public Map getRequestHeaderValuesMap() {

         if (requestHeaderValuesMap == null) {

             requestHeaderValuesMap = new ServletRequestHeaderValuesMap(

                     (HttpServletRequest) request);

         }

         return requestHeaderValuesMap;

     }

     public Locale getRequestLocale() {

         return request.getLocale();

     }

     public Iterator getRequestLocales() {

         final Enumeration locales = request.getLocales();

         return ServletExternalContextUtil.getLocales(locales);

     }

     public Map getRequestMap() {

         if (requestMap == null) {

             requestMap = new ServletRequestMap(request);

         }

         return requestMap;

     }

     public Map getRequestParameterMap() {

         if (requestParameterMap == null) {

             requestParameterMap = new ServletRequestParameterMap(request);

         }

         return requestParameterMap;

     }

     public Iterator getRequestParameterNames() {

         final Enumeration paramNames = request.getParameterNames();

         return ServletExternalContextUtil.getRequestParameterNames(paramNames);

     }

     public Map getRequestParameterValuesMap() {

         if (requestParameterValuesMap == null) {

             requestParameterValuesMap = new ServletRequestParameterValuesMap(

                     request);

         }

         return requestParameterValuesMap;

     }

     public String getRequestPathInfo() {

         return pathInfo;

     }

     public String getRequestServletPath() {

         return servletPath;

     }

     public URL getResource(String path) throws MalformedURLException {

         return context.getResource(path);

     }

     public InputStream getResourceAsStream(String path) {

         return context.getResourceAsStream(path);

     }

     public Set getResourcePaths(String path) {

         return context.getResourcePaths(path);

     }

     public Object getResponse() {

         return response;

     }

     public Object getSession(boolean create) {

         assertHttpServletRequest();

         HttpServletRequest httpRequest = (HttpServletRequest) request;

         return httpRequest.getSession(create);

     }

     public Map getSessionMap() {

         if (sessionMap == null) {

             HttpServletRequest httpRequest = (HttpServletRequest) request;

             sessionMap = new HttpSessionMap(httpRequest);

         }

         return sessionMap;

     }

     public Principal getUserPrincipal() {

         assertHttpServletRequest();

         HttpServletRequest httpRequest = (HttpServletRequest) request;

         return httpRequest.getUserPrincipal();

     }

     public boolean isUserInRole(String role) {

         assertHttpServletRequest();

         HttpServletRequest httpRequest = (HttpServletRequest) request;

         return httpRequest.isUserInRole(role);

     }

     public void log(String message) {

         AssertionUtil.assertNotNull("message is null.", message);

         context.log(message);

         logger.debug(message);

     }

     public void log(String message, Throwable exception) {

         AssertionUtil.assertNotNull("message", message);

         AssertionUtil.assertNotNull("exception", exception);

         context.log(message, exception);

         logger.log(exception);

     }

     public void redirect(String url) throws IOException {

         assertHttpServletResponse();

         ServletExternalContextUtil.redirect(url, request, response);

     }

     private void assertHttpServletRequest() {

         if (!isHttpServletRequest) {

             throw new IllegalStateException();

         }

     }

     private void assertHttpServletResponse() {

         if (!isHttpServletResponse) {

             throw new IllegalStateException();

         }

     }

     public void release() {

         this.context = null;

         this.request = null;

         this.response = null;

         this.servletPath = null;

         this.pathInfo = null;

         this.applicationMap = null;

         this.initParameterMap = null;

         this.sessionMap = null;

         this.requestCookieMap = null;

         this.requestParameterMap = null;

         this.requestParameterValuesMap = null;

         this.requestMap = null;

         this.requestHeaderMap = null;

         this.requestHeaderValuesMap = null;

     }

     public void setEncodeUrlCustomizer(EncodeUrlCustomizer customizer) {

         this.customizer = customizer;

     }

 }