Examples of org.apache.velocity.tools.view.context.ChainedContext

Package org.apache.velocity.tools.view.context

Examples of org.apache.velocity.tools.view.context.ChainedContext

org.apache.velocity.tools.view.context.ChainedContext
Velocity context implementation specific to the Servlet environment.

It provides the following special features:
- puts the request, response, session, and servlet context objects into the Velocity context for direct access, and keeps them read-only
- supports a read-only toolbox of view tools
- auto-searches servlet request attributes, session attributes and servlet context attribues for objects
The {@link #internalGet(String key)} method implements the following search orderfor objects:
1. toolbox
2. servlet request, servlet response, servlet session, servlet context
3. local hashtable of objects (traditional use)
4. servlet request attribues, servlet session attribute, servlet context attributes
The purpose of this class is to make it easy for web designer to work with Java servlet based web applications. They do not need to be concerned with the concepts of request, session or application attributes and the lifetime of objects in these scopes.

Note that the put() method always puts objects into the local hashtable.
@author Geir Magnusson Jr. @author Gabe Sidler @deprecated Use {@link ViewToolContext} instead @version $Id: ChainedContext.java 564438 2007-08-10 00:15:18Z nbubna $

                                            HttpServletResponse response)
    {
        ViewToolContext ctx;
        if (this.deprecationSupportMode)
        {
            ctx = new ChainedContext(velocity, request, response, servletContext);
        }
        else
        {
            ctx = new ViewToolContext(velocity, request, response, servletContext);
        }

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     * @param response servlet reponse to client
     */
    protected Context createContext(HttpServletRequest request, 
                                    HttpServletResponse response)
    {
        ChainedContext ctx = new ChainedContext(null, request, response, getServletContext());


        /* if we have a toolbox manager, get a toolbox from it */
        if (toolboxManager != null)
        {
            ctx.setToolbox(toolboxManager.getToolboxContext(ctx));
        }
        return ctx;
    }

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            // in case this was used outside the lifecycle of struts servlet
            LOG.debug("internal toolbox context ignored");
        }


        if (toolboxManager != null && ctx != null) {
            ChainedContext chained = new ChainedContext(context, velocityEngine, req, res, ctx);
            chained.setToolbox(toolboxManager.getToolbox(chained));
            result = chained;
        } else {
            result = context;
        }

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            // in case this was used outside the lifecycle of struts servlet
            LOG.debug("internal toolbox context ignored");
        }


        if (toolboxManager != null && ctx != null) {
            ChainedContext chained = new ChainedContext(context, velocityEngine, req, res, ctx);
            chained.setToolbox(toolboxManager.getToolbox(chained));
            result = chained;
        } else {
            result = context;
        }

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                                         HttpServletResponse response)
    {
        ViewToolContext ctx;
        if (this.deprecationSupportMode)
        {
            ctx = new ChainedContext(velocity, request, response, servletContext);
        }
        else
        {
            ctx = new ViewToolContext(velocity, request, response, servletContext);
        }

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  @Override
  protected Context createVelocityContext(
      Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception {


    // Create a ChainedContext instance.
    ChainedContext velocityContext = new ChainedContext(
        new VelocityContext(model), getVelocityEngine(), request, response, getServletContext());


    // Load a Velocity Tools toolbox, if necessary.
    if (getToolboxConfigLocation() != null) {
      ToolboxManager toolboxManager = ServletToolboxManager.getInstance(
          getServletContext(), getToolboxConfigLocation());
      Map<?, ?> toolboxContext = toolboxManager.getToolbox(velocityContext);
      velocityContext.setToolbox(toolboxContext);
    }


    return velocityContext;
  }

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  @Override
  protected Context createVelocityContext(
      Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception {


    // Create a ChainedContext instance.
    ChainedContext velocityContext = new ChainedContext(
        new VelocityContext(model), getVelocityEngine(), request, response, getServletContext());


    // Load a Velocity Tools toolbox, if necessary.
    if (getToolboxConfigLocation() != null) {
      ToolboxManager toolboxManager = ServletToolboxManager.getInstance(
          getServletContext(), getToolboxConfigLocation());
      Map toolboxContext = toolboxManager.getToolbox(velocityContext);
      velocityContext.setToolbox(toolboxContext);
    }


    return velocityContext;
  }

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                LOG.debug("internal toolbox context ignored");
            }
        }


        if (toolboxManager != null && ctx != null) {
            ChainedContext chained = new ChainedContext(context, velocityEngine, req, res, ctx);
            chained.setToolbox(toolboxManager.getToolbox(chained));
            result = chained;
        } else {
            result = context;
        }

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     * @param response servlet reponse to client
     */
    protected Context createContext(HttpServletRequest request, 
                                    HttpServletResponse response)
    {
        ChainedContext ctx = new ChainedContext(null, request, response, getServletContext());


        /* if we have a toolbox manager, get a toolbox from it */
        if (toolboxManager != null)
        {
            ctx.setToolbox(toolboxManager.getToolboxContext(ctx));
        }
        return ctx;
    }

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     * @param response servlet reponse to client
     */
    protected Context createContext(HttpServletRequest request, 
                                    HttpServletResponse response)
    {
        ChainedContext ctx = 
            new ChainedContext(velocity, request, response, getServletContext());


        /* if we have a toolbox manager, get a toolbox from it */
        if (toolboxManager != null)
        {
            ctx.setToolbox(toolboxManager.getToolbox(ctx));
        }
        return ctx;
    }

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