org.springframework.web.servlet.mvc.throwaway
Class ThrowawayControllerHandlerAdapter

java.lang.Object
  org.springframework.web.servlet.mvc.throwaway.ThrowawayControllerHandlerAdapter

All Implemented Interfaces:

HandlerAdapter

public class ThrowawayControllerHandlerAdapter
extends Object
implements HandlerAdapter

Adapter to use the ThrowawayController workflow interface with the generic DispatcherServlet. Does not support last-modified checks.

This is an SPI class, not used directly by application code. It can be explicitly configured in a DispatcherServlet context, to use a customized version instead of the default ThrowawayControllerHandlerAdapter.

Since:

08.12.2003

Author:

Juergen Hoeller

Field Summary

static String

DEFAULT_COMMAND_NAME

Constructor Summary

ThrowawayControllerHandlerAdapter()

Method Summary

protected ServletRequestDataBinder	createBinder(HttpServletRequest request, ThrowawayController command) Create a new binder instance for the given command and request.
String	getCommandName() Return the name of the command in the model.
long	getLastModified(HttpServletRequest request, Object handler) This implementation always returns -1, as last-modified checks are not supported.
ModelAndView	handle(HttpServletRequest request, HttpServletResponse response, Object handler) This implementation binds request parameters to the ThrowawayController instance and then calls execute on it.
protected void	initBinder(HttpServletRequest request, ServletRequestDataBinder binder) Initialize the given binder instance, for example with custom editors.
void	setCommandName(String commandName) Set the name of the command in the model.
boolean	supports(Object handler) Given a handler instance, return whether or not this HandlerAdapter can support it.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_COMMAND_NAME

public static final String DEFAULT_COMMAND_NAME

See Also:

Constant Field Values

Constructor Detail

ThrowawayControllerHandlerAdapter

public ThrowawayControllerHandlerAdapter()

Method Detail

setCommandName

public final void setCommandName(String commandName)

Set the name of the command in the model. The command object will be included in the model under this name.

getCommandName

public final String getCommandName()

Return the name of the command in the model.

supports

public boolean supports(Object handler)

Description copied from interface: HandlerAdapter

Given a handler instance, return whether or not this HandlerAdapter can support it. Typical HandlerAdapters will base the decision on the handler type. HandlerAdapters will usually only support one handler type each.

A typical implementation:

return (handler instanceof MyHandler);

Specified by:

supports in interface HandlerAdapter

Parameters:

handler - handler object to check

Returns:

whether or not this object can use the given handler

handle

public ModelAndView handle(HttpServletRequest request,
                           HttpServletResponse response,
                           Object handler)
                    throws Exception

This implementation binds request parameters to the ThrowawayController instance and then calls execute on it.

Specified by:

handle in interface HandlerAdapter

Parameters:

request - current HTTP request

response - current HTTP response

handler - handler to use. This object must have previously been passed to the supports method of this interface, which must have returned true.

Returns:

ModelAndView object with the name of the view and the required model data, or null if the request has been handled directly

Throws:

Exception - in case of errors

See Also:

createBinder(javax.servlet.http.HttpServletRequest, org.springframework.web.servlet.mvc.throwaway.ThrowawayController), ThrowawayController.execute()

createBinder

protected ServletRequestDataBinder createBinder(HttpServletRequest request,
                                                ThrowawayController command)
                                         throws Exception

Create a new binder instance for the given command and request.

Called by bindAndValidate. Can be overridden to plug in custom ServletRequestDataBinder subclasses.

Default implementation creates a standard ServletRequestDataBinder, sets the specified MessageCodesResolver (if any), and invokes initBinder. Note that initBinder will not be invoked if you override this method!

Parameters:

request - current HTTP request

command - the command to bind onto

Returns:

the new binder instance

Throws:

Exception - in case of invalid state or arguments

See Also:

initBinder(javax.servlet.http.HttpServletRequest, org.springframework.web.bind.ServletRequestDataBinder), getCommandName()

initBinder

protected void initBinder(HttpServletRequest request,
                          ServletRequestDataBinder binder)
                   throws Exception

Initialize the given binder instance, for example with custom editors. Called by createBinder.

This method allows you to register custom editors for certain fields of your command class. For instance, you will be able to transform Date objects into a String pattern and back, in order to allow your JavaBeans to have Date properties and still be able to set and display them in an HTML interface.

Default implementation is empty.

Parameters:

request - current HTTP request

binder - new binder instance

Throws:

Exception - in case of invalid state or arguments

See Also:

createBinder(javax.servlet.http.HttpServletRequest, org.springframework.web.servlet.mvc.throwaway.ThrowawayController), DataBinder.registerCustomEditor(java.lang.Class, java.beans.PropertyEditor), CustomDateEditor

getLastModified

public long getLastModified(HttpServletRequest request,
                            Object handler)

This implementation always returns -1, as last-modified checks are not supported.

Specified by:

getLastModified in interface HandlerAdapter

Parameters:

request - current HTTP request

handler - handler to use

Returns:

the lastModified value for the given handler

See Also:

HttpServlet.getLastModified(javax.servlet.http.HttpServletRequest), LastModified.getLastModified(javax.servlet.http.HttpServletRequest)