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## org.apache.struts.chain.commands
Class AbstractPopulateActionForm

    java.lang.Object
      org.apache.struts.chain.commands.ActionCommandBase
          org.apache.struts.chain.commands.AbstractPopulateActionForm

All Implemented Interfaces:
  org.apache.commons.chain.Command, ActionCommand

Direct Known Subclasses:
  PopulateActionForm

    public abstract class AbstractPopulateActionForm

extends ActionCommandBase

Populate the form bean (if any) for this request.

Version:
  $Rev: 471754 $ $Date: 2005-11-12 13:01:44 -0500 (Sat, 12 Nov 2005) $

Field Summary

Fields inherited from interface org.apache.commons.chain.Command
`CONTINUE_PROCESSING, PROCESSING_COMPLETE`

Constructor Summary
`AbstractPopulateActionForm()`

Method Summary
`boolean` | `execute(ActionContext actionCtx)` Populate the form bean (if any) for this request.
`protected void` | `handleCancel(ActionContext context, ActionConfig actionConfig, ActionForm actionForm)` Take into account whether the request includes any defined value for the global "cancel" parameter.
`protected abstract void` | `populate(ActionContext context, ActionConfig actionConfig, ActionForm actionForm)` Populate the given `ActionForm` with request parameter values, taking into account any prefix/suffix values configured on the given `ActionConfig`.
`protected abstract void` | `reset(ActionContext context, ActionConfig actionConfig, ActionForm actionForm)` Call the `reset()` method on the specified form bean.
`protected String` | `trimParameterName(ActionConfig actionConfig, String name)` For a given request parameter name, trim off any prefix and/or suffix which are defined in `actionConfig` and return what remains.

Methods inherited from class org.apache.struts.chain.commands.ActionCommandBase
`execute`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### AbstractPopulateActionForm

    public AbstractPopulateActionForm()

Method Detail

### execute

    public boolean execute(ActionContext actionCtx)
                    throws Exception

  Populate the form bean (if any) for this request.

  Specified by:
    `execute` in interface `ActionCommand`
  Specified by:
    `execute` in class `ActionCommandBase`
  Parameters:
    `actionCtx` - The `Context` for the current request
  Returns:
    `false` so that processing continues
  Throws:
    `Exception` - On an unexpected error

### reset

    protected abstract void reset(ActionContext context,
                                  ActionConfig actionConfig,
                                  ActionForm actionForm)

  Call the `reset()` method on the specified form bean.

  Parameters:
    `context` - The context for this request
    `actionConfig` - The actionConfig for this request
    `actionForm` - The form bean for this request

### populate

    protected abstract void populate(ActionContext context,
                                     ActionConfig actionConfig,
                                     ActionForm actionForm)
                              throws Exception

  Populate the given `ActionForm` with request parameter values, taking into account any prefix/suffix values configured on the given `ActionConfig`.

  Parameters:
    `context` - The ActionContext we are processing
    `actionConfig` - The ActionConfig we are processing
    `actionForm` - The ActionForm we are processing
  Throws:
    `Exception` - On an unexpected error

### trimParameterName

    protected String trimParameterName(ActionConfig actionConfig,
                                       String name)

  For a given request parameter name, trim off any prefix and/or suffix which are defined in `actionConfig` and return what remains. If either prefix or suffix is defined, then return null for `name` values which do not begin or end accordingly.

  Parameters:
    `actionConfig` - The ActionConfig we are processing
    `name` - The request parameter name to proceess
  Returns:
    The request parameter name trimmed of any suffix or prefix

### handleCancel

    protected void handleCancel(ActionContext context,
                                ActionConfig actionConfig,
                                ActionForm actionForm)
                         throws Exception

  Take into account whether the request includes any defined value for the global "cancel" parameter.

  An issue was raised (but I don't think a Bugzilla ticket created) about the security implications of using a well-known cancel property which skips form validation, as you may not write your actions to deal with the cancellation case.

  Parameters:
    `context` - The ActionContext we are processing
    `actionConfig` - The ActionConfig we are processing
    `actionForm` - The ActionForm we are processing
  Throws:
    `Exception` - On an unexpected error
  See Also:
    `Globals.CANCEL_PROPERTY`, `Globals.CANCEL_PROPERTY_X`

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