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

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
                      org.springframework.web.servlet.handler.metadata.CommonsPathMapHandlerMapping

All Implemented Interfaces:

ApplicationContextAware, HandlerMapping, Ordered

public class CommonsPathMapHandlerMapping

extends AbstractPathMapHandlerMapping

Subclass of AbstractPathMapHandlerMapping that recognizes Commons Attributes metadata attributes of type PathMap on application Controllers and automatically wires them into the current servlet's WebApplicationContext.

Controllers must have class attributes of the form: &64;org.springframework.web.servlet.handler.commonsattributes.PathMap("/path.cgi")

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.

To use this feature, you must compile application classes with Commons Attributes, and run the Commons Attributes indexer tool on your application classes, which must be in a Jar rather than in WEB-INF/classes.

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

CommonsPathMapHandlerMapping()

Method Summary

protected java.lang.Class[]	getClassesWithPathMapAttributes() Use Commons Attributes AttributeIndex to get a Collection of Class objects with the required PathMap attribute.
protected PathMap[]	getPathMapAttributes(java.lang.Class handlerClass) Use Commons Attributes to find PathMap attributes for the given class.

Methods inherited from class org.springframework.web.servlet.handler.metadata.AbstractPathMapHandlerMapping

initApplicationContext

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

CommonsPathMapHandlerMapping

public CommonsPathMapHandlerMapping()

Method Detail

getClassesWithPathMapAttributes

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

Use Commons Attributes AttributeIndex to get a Collection of Class objects with the required PathMap attribute. Protected so that it can be overridden during testing.

Specified by:

getClassesWithPathMapAttributes in class AbstractPathMapHandlerMapping

Returns:

a array of Class objects

Throws:

java.lang.Exception

getPathMapAttributes

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

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

Specified by:

getPathMapAttributes in class AbstractPathMapHandlerMapping

Parameters:

handlerClass - the handler class to look for

Returns:

an array of PathMap objects