ViewContext


1   /*
2    * $Id: ViewContext.java,v 1.2 2003/02/19 22:50:49 lhoriman Exp $
3    * $Source: /cvsroot/mav/maverick/src/java/org/infohazard/maverick/flow/ViewContext.java,v $
4    */
5   
6   package org.infohazard.maverick.flow;
7   
8   import java.util.Map  ;
9   import javax.servlet.ServletContext  ;
10  import javax.servlet.ServletException  ;
11  import javax.servlet.http.HttpServletResponse  ;
12  import javax.servlet.http.HttpServletRequest  ;
13  
14  /**
15   * ViewContext defines the methods and data available to a view
16   * for a single request.
17   */
18  public interface ViewContext
19  {
20      /**
21       * Obtain the model which is to be rendered.
22       */
23      public Object   getModel();
24  
25      /**
26       * Obtain any params that were set.
27       */
28      public Map   getViewParams();
29      
30      /**
31       * This is where output should be sent.  If it returns null,
32       * there are no transforms, and you should use the real response.
33       */
34      public TransformStep getNextStep() throws ServletException  ;
35      
36      /**
37       */
38      public HttpServletRequest   getRequest();
39  
40      /**
41       */
42      public ServletContext   getServletContext();
43  
44      /**
45       * Returns the *real* response object.  Do not use this
46       * unless you know are the tail!
47       */
48      public HttpServletResponse   getRealResponse();
49  }
50

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