org.springframework.web.servlet.handler.metadata
Class AbstractPathMapHandlerMapping

java.lang.Object
  org.springframework.context.support.ApplicationObjectSupport
      org.springframework.web.context.support.WebApplicationObjectSupport
          org.springframework.web.servlet.handler.AbstractHandlerMapping
              org.springframework.web.servlet.handler.AbstractUrlHandlerMapping
                  org.springframework.web.servlet.handler.metadata.AbstractPathMapHandlerMapping

All Implemented Interfaces:

ApplicationContextAware, HandlerMapping, Ordered

Direct Known Subclasses:

CommonsPathMapHandlerMapping

public abstract class AbstractPathMapHandlerMapping

extends AbstractUrlHandlerMapping

Abstract implementation of the HandlerMapping interface that recognizes metadata attributes of type PathMap on application Controllers and automatically wires them into the current servlet's WebApplicationContext.

The path must be mapped to the relevant Spring DispatcherServlet in /WEB-INF/web.xml. It's possible to have multiple PathMap attributes on the one controller class.

Controllers instantiated by this class may have dependencies on middle tier objects, expressed via JavaBean properties or constructor arguments. These will be resolved automatically.

You will normally use this HandlerMapping with at most one DispatcherServlet in your web application. Otherwise you'll end with one instance of the mapped controller for each DispatcherServlet's context. You might want this -- for example, if one's using a .pdf mapping and a PDF view, and another a JSP view, or if using different middle tier objects, but should understand the implications. All Controllers with attributes will be picked up by each DispatcherServlet's context.

Author:

Rod Johnson, Juergen Hoeller

Field Summary

Fields inherited from class org.springframework.web.servlet.handler.AbstractHandlerMapping

logger

Constructor Summary

AbstractPathMapHandlerMapping()

Method Summary

protected abstract java.lang.Class[]	getClassesWithPathMapAttributes() Use an attribute index to get a Collection of Class objects with the required PathMap attribute.
protected abstract PathMap[]	getPathMapAttributes(java.lang.Class handlerClass) Use Attributes API to find PathMap attributes for the given handler class.
void	initApplicationContext() Look for all classes with a PathMap class attribute, instantiate them in the owning ApplicationContext and register them as MVC handlers usable by the current DispatcherServlet.

Methods inherited from class org.springframework.web.servlet.handler.AbstractUrlHandlerMapping

getHandlerInternal, lookupHandler, registerHandler, setAlwaysUseFullPath, setLazyInitHandlers, setUrlDecode, setUrlPathHelper

Methods inherited from class org.springframework.web.servlet.handler.AbstractHandlerMapping

getDefaultHandler, getHandler, getOrder, setDefaultHandler, setInterceptors, setOrder

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

getServletContext, getTempDir, getWebApplicationContext

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

getApplicationContext, getMessageSourceAccessor, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractPathMapHandlerMapping

public AbstractPathMapHandlerMapping()

Method Detail

initApplicationContext

public void initApplicationContext()
                            throws BeansException

Look for all classes with a PathMap class attribute, instantiate them in the owning ApplicationContext and register them as MVC handlers usable by the current DispatcherServlet.

Overrides:

initApplicationContext in class ApplicationObjectSupport

Throws:

BeansException - if thrown by application context methods

See Also:

ApplicationObjectSupport.initApplicationContext()

getClassesWithPathMapAttributes

protected abstract java.lang.Class[] getClassesWithPathMapAttributes()
                                                              throws java.lang.Exception

Use an attribute index to get a Collection of Class objects with the required PathMap attribute.

Returns:

a array of Class objects

Throws:

java.lang.Exception

getPathMapAttributes

protected abstract PathMap[] getPathMapAttributes(java.lang.Class handlerClass)
                                           throws java.lang.Exception

Use Attributes API to find PathMap attributes for the given handler class. We know there's at least one, as the getClassNamesWithPathMapAttributes method return this class name.

Parameters:

handlerClass - the handler class to look for

Returns:

an array of PathMap objects

Throws:

java.lang.Exception