com.interface21.web.servlet.mvc
Class SimpleControllerHandlerAdapter

java.lang.Object
  |
  +--com.interface21.context.support.ApplicationObjectSupport
        |
        +--com.interface21.web.servlet.mvc.SimpleControllerHandlerAdapter

All Implemented Interfaces:

ApplicationContextAware, HandlerAdapter

public class SimpleControllerHandlerAdapter

extends ApplicationObjectSupport

implements HandlerAdapter

Adapter to use the Controller workflow interface with the generic DispatcherServlet. This is an SPI class, not used directly by application code.

Version:

$Id: SimpleControllerHandlerAdapter.java,v 1.4 2003/06/06 16:15:09 jhoeller Exp $

Author:

Rod Johnson

See Also:

DispatcherServlet

Fields inherited from class com.interface21.context.support.ApplicationObjectSupport

logger

Constructor Summary

SimpleControllerHandlerAdapter()

Method Summary

long	getLastModified(javax.servlet.http.HttpServletRequest request, java.lang.Object handler) Same contract as for HttpServlet.getLastModified.
ModelAndView	handle(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, java.lang.Object handler) Use the given handler to handle this request.
boolean	supports(java.lang.Object handler) Given a handler instance, return whether or not this HandlerAdapter can support it.

Methods inherited from class com.interface21.context.support.ApplicationObjectSupport

getApplicationContext, initApplicationContext, setApplicationContext

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.interface21.context.ApplicationContextAware

setApplicationContext

Constructor Detail

SimpleControllerHandlerAdapter

public SimpleControllerHandlerAdapter()

Method Detail

supports

public boolean supports(java.lang.Object handler)

Description copied from interface: HandlerAdapter

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

A typical implementation: return handler != null && MyHandler.class.isAssignableFrom(handler.getClass());

Specified by:

supports in interface HandlerAdapter

Following copied from interface: com.interface21.web.servlet.HandlerAdapter

Parameters:

handler - handler object to check

Returns:

whether or not this object can use the given handler

handle

public ModelAndView handle(javax.servlet.http.HttpServletRequest request,
                           javax.servlet.http.HttpServletResponse response,
                           java.lang.Object handler)
                    throws javax.servlet.ServletException,
                           java.io.IOException

Description copied from interface: HandlerAdapter

Use the given handler to handle this request. The workflow that is required may vary widely. Can also perform authorization checks.

Specified by:

handle in interface HandlerAdapter

Following copied from interface: com.interface21.web.servlet.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. Implementations that generate output themselves (and return null from this method) may encounter IOExceptions.

Returns:

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

Throws:

javax.servlet.ServletException - if there is a general error

java.io.IOException - in case of I/O errors

getLastModified

public long getLastModified(javax.servlet.http.HttpServletRequest request,
                            java.lang.Object handler)

Description copied from interface: HandlerAdapter

Same contract as for HttpServlet.getLastModified. Can simply return -1 if there's no support in the handler class.

Specified by:

getLastModified in interface HandlerAdapter

Following copied from interface: com.interface21.web.servlet.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)