org.apache.turbine.modules.pages

## Class DefaultPage

- java.lang.Object
- - org.apache.turbine.modules.Assembler
  - - org.apache.turbine.modules.Page
    - - org.apache.turbine.modules.pages.DefaultPage

- Direct Known Subclasses:
    TemplatePage

      public class DefaultPage
      extends Page

  When building sites using templates, Screens need only be defined for templates which require dynamic (database or object) data.

  This page can be used on sites where the number of Screens can be much less than the number of templates. The templates can be grouped in directories with common layouts. Screen modules are then expected to be placed in packages corresponding with the templates' directories and follow a specific naming scheme.

  The template parameter is parsed and and a Screen whose package matches the templates path and shares the same name minus any extension and beginning with a capital letter is searched for. If not found, a Screen in a package matching the template's path with name Default is searched for. If still not found, a Screen with name Default is looked for in packages corresponding to parent directories in the template's path until a match is found.

  For example if data.getParameters().getString("template") returns /about_us/directions/driving.wm, the search follows about_us.directions.Driving, about_us.directions.Default, about_us.Default, Default, VelocitySiteScreen.

  Only one Layout module is used, since it is expected that any dynamic content will be placed in navigations and screens. The layout template to be used is found in a similar way to the Screen. For example the following paths will be searched in the layouts subdirectory: /about_us/directions/driving.wm, /about_us/directions/default.wm, /about_us/default.wm, /default.wm.

  This approach allows a site with largely static content to be updated and added to regularly by those with little Java experience.

  The code is an almost a complete clone of the FreeMarkerSitePage written by John McNally. I've only modified it for Template use.

  Version:
    $Id: DefaultPage.java 1709648 2015-10-20 17:08:10Z tv $
  Author:
    Dave Bryson, Henning P. Schmiedehausen, Peter Courcoux

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected ActionLoader` | `actionLoader` Injected loader instance
    `protected LayoutLoader` | `layoutLoader` Injected loader instance
    `protected org.apache.commons.logging.Log` | `log` Logging
    `protected ScreenLoader` | `screenLoader` Injected loader instance

    - ### Fields inherited from class org.apache.turbine.modules.Page

      `CACHE_SIZE_DEFAULT, CACHE_SIZE_KEY, NAME, PREFIX`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `DefaultPage()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `doBuild(PipelineData pipelineData)` Builds the Page.
    `protected void` | `doBuildAfterAction(PipelineData pipelineData)` Can be overridden by template Pages to set up data needed to process a template.
    `protected void` | `doBuildBeforeAction(PipelineData pipelineData)` Can be used by template Pages to stuff the Context into the PipelineData so that it is available to the Action module and the Screen module via getContext().
    `protected void` | `doPostBuild(PipelineData pipelineData)` Can be overridden to perform actions when the request is fully processed.

    - ### Methods inherited from class org.apache.turbine.modules.Page

      `build, getPrefix`

    - ### Methods inherited from class org.apache.turbine.modules.Assembler

      `getRunData`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### log

          protected org.apache.commons.logging.Log log

      Logging

    - #### actionLoader

          protected ActionLoader actionLoader

      Injected loader instance

    - #### screenLoader

          protected ScreenLoader screenLoader

      Injected loader instance

    - #### layoutLoader

          protected LayoutLoader layoutLoader

      Injected loader instance

  - ### Constructor Detail

    - #### DefaultPage

          public DefaultPage()

  - ### Method Detail

    - #### doBuild

          public void doBuild(PipelineData pipelineData)
                       throws Exception

      Builds the Page.
      Specified by:
        `doBuild` in class `Page`
      Parameters:
        `pipelineData` - Turbine information.
      Throws:
        `Exception,` - a generic exception.
        `Exception` - a generic exception.

    - #### doBuildBeforeAction

          protected void doBuildBeforeAction(PipelineData pipelineData)
                                      throws Exception

      Can be used by template Pages to stuff the Context into the PipelineData so that it is available to the Action module and the Screen module via getContext(). It does nothing here.
      Parameters:
        `pipelineData` - Turbine information.
      Throws:
        `Exception,` - a generic exception.
        `Exception`

    - #### doBuildAfterAction

          protected void doBuildAfterAction(PipelineData pipelineData)
                                     throws Exception

      Can be overridden by template Pages to set up data needed to process a template. It does nothing here.
      Parameters:
        `pipelineData` - Turbine information.
      Throws:
        `Exception,` - a generic exception.
        `Exception`

    - #### doPostBuild

          protected void doPostBuild(PipelineData pipelineData)
                              throws Exception

      Can be overridden to perform actions when the request is fully processed. It does nothing here.
      Parameters:
        `pipelineData` - Turbine information.
      Throws:
        `Exception,` - a generic exception.
        `Exception`

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