1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   *  contributor license agreements.  The ASF licenses this file to You
     4   * under the Apache License, Version 2.0 (the "License"); you may not
     5   * use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.  For additional information regarding
    15   * copyright in this work, please see the NOTICE file in the top level
    16   * directory of this distribution.
    17   */
    18  
    19  package org.apache.roller.weblogger.ui.struts2.util;
    20  
    21  import com.opensymphony.xwork2.ActionContext;
    22  import com.opensymphony.xwork2.ActionInvocation;
    23  import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
    24  import javax.servlet.http.HttpServletRequest;
    25  import org.apache.commons.lang.StringUtils;
    26  import org.apache.commons.logging.Log;
    27  import org.apache.commons.logging.LogFactory;
    28  import org.apache.roller.weblogger.business.WebloggerFactory;
    29  import org.apache.roller.weblogger.business.UserManager;
    30  import org.apache.roller.weblogger.pojos.Weblog;
    31  import org.apache.roller.weblogger.ui.core.RollerSession;
    32  import org.apache.struts2.StrutsStatics;
    33  
    34  
    35  /**
    36   * A struts2 interceptor for configuring specifics of the weblogger ui.
    37   */
         /* 
    P/P   *  Method: void org.apache.roller.weblogger.ui.struts2.util.UIActionInterceptor()
          */
    38  public class UIActionInterceptor extends AbstractInterceptor 
    39          implements StrutsStatics {
    40      
             /* 
    P/P       *  Method: org.apache.roller.weblogger.ui.struts2.util.UIActionInterceptor__static_init
              * 
              *  Postconditions:
              *    init'ed(log)
              */
    41      private static Log log = LogFactory.getLog(UIActionInterceptor.class);
    42      
    43      
    44      public String intercept(ActionInvocation invocation) throws Exception {
    45          
                 /* 
    P/P           *  Method: String intercept(ActionInvocation)
                  * 
                  *  Preconditions:
                  *    invocation != null
                  *    log != null
                  * 
                  *  Presumptions:
                  *    com.opensymphony.xwork2.ActionInvocation:getInvocationContext(...)@49 != null
                  *    org.apache.roller.weblogger.business.Weblogger:getUserManager(...)@71 != null
                  *    org.apache.roller.weblogger.business.WebloggerFactory:getWeblogger(...)@71 != null
                  * 
                  *  Postconditions:
                  *    init'ed(return_value)
                  * 
                  *  Test Vectors:
                  *    org.apache.commons.lang.StringUtils:isEmpty(...)@68: {1}, {0}
                  *    org.apache.roller.weblogger.business.UserManager:getWebsiteByHandle(...)@72: Addr_Set{null}, Inverse{null}
                  *    org.apache.roller.weblogger.ui.core.RollerSession:getRollerSession(...)@61: Addr_Set{null}, Inverse{null}
                  */
    46          log.debug("Entering UIActionInterceptor");
    47          
    48          final Object action = invocation.getAction();
    49          final ActionContext context = invocation.getInvocationContext();
    50          
    51          HttpServletRequest request = (HttpServletRequest) context.get(HTTP_REQUEST);
    52          
    53          // is this one of our own UIAction classes?
    54          if (action instanceof UIAction) {
    55              
    56              log.debug("action is a UIAction, setting relevant attributes");
    57              
    58              UIAction theAction = (UIAction) action;
    59              
    60              // extract the authenticated user and set it
    61              RollerSession rses = RollerSession.getRollerSession(request);
    62              if(rses != null) {
    63                  theAction.setAuthenticatedUser(rses.getAuthenticatedUser());
    64              }
    65              
    66              // extract the work weblog and set it
    67              String weblogHandle = theAction.getWeblog();
    68              if(!StringUtils.isEmpty(weblogHandle)) {
    69                  Weblog weblog = null;
    70                  try {
    71                      UserManager mgr = WebloggerFactory.getWeblogger().getUserManager();
    72                      weblog = mgr.getWebsiteByHandle(weblogHandle);
    73                      if(weblog != null) {
    74                          theAction.setActionWeblog(weblog);
    75                      }
    76                  } catch(Exception e) {
    77                      log.error("Error looking up action weblog - "+weblogHandle, e);
    78                  }
    79              }
    80          }
    81          
    82          return invocation.invoke();
    83      }
    84      
    85  }