/*

  * 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.util;

 import javax.faces.FacesException;

 import javax.faces.context.FacesContext;

 import javax.faces.internal.FacesConfigOptions;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.seasar.framework.util.AssertionUtil;

 import org.seasar.framework.util.StringUtil;

 import org.seasar.teeda.core.resolver.RedirectUrlResolver;

 /**

  * @author shot

  */

 public class DefaultRedirectUrlResolverImpl implements RedirectUrlResolver {

     public String resolveUrl(final String contextPath,

             final FacesContext context, final HttpServletRequest request,

             final HttpServletResponse response) throws FacesException {

         AssertionUtil.assertNotNull("contextPath", contextPath);

         final String redirectUrl = FacesConfigOptions.getRedirectUrl();

         if (StringUtil.isEmpty(redirectUrl)) {

             return contextPath;

         }

         if (redirectUrl.endsWith("/") && contextPath.startsWith("/")) {

             return redirectUrl + contextPath.substring(1);

         } else {

             return redirectUrl + contextPath;

         }

     }

 }