org.springframework.web.context.support

Class WebApplicationObjectSupport

java.lang.Object

org.springframework.context.support.ApplicationObjectSupport

org.springframework.web.context.support.WebApplicationObjectSupport

All Implemented Interfaces:

Aware, ApplicationContextAware, ServletContextAware

Direct Known Subclasses:

AbstractCachingViewResolver, AbstractHandlerMapping, AbstractView, BeanNameViewResolver, ContentNegotiatingViewResolver, ServerEndpointExporter, WebContentGenerator

public abstract class WebApplicationObjectSupport
extends ApplicationObjectSupport
implements ServletContextAware

Convenient superclass for application objects running in a WebApplicationContext. Provides getWebApplicationContext(), getServletContext(), and getTempDir() accessors.

Note: It is generally recommended to use individual callback interfaces for the actual callbacks needed. This broad base class is primarily intended for use within the framework, in case of ServletContext access etc typically being needed.

Since:

28.08.2003

Author:

Juergen Hoeller

See Also:

SpringBeanAutowiringSupport

Field Summary

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

logger

Constructor Summary

Constructors

Constructor and Description
WebApplicationObjectSupport()

Method Summary

Modifier and Type	Method and Description
protected ServletContext	getServletContext() Return the current ServletContext.
protected File	getTempDir() Return the temporary directory for the current web application, as provided by the servlet container.
protected WebApplicationContext	getWebApplicationContext() Return the current application context as WebApplicationContext.
protected void	initApplicationContext(ApplicationContext context) Calls initServletContext(javax.servlet.ServletContext) if the given ApplicationContext is a WebApplicationContext.
protected void	initServletContext(ServletContext servletContext) Subclasses may override this for custom initialization based on the ServletContext that this application object runs in.
protected boolean	isContextRequired() Overrides the base class behavior to enforce running in an ApplicationContext.
void	setServletContext(ServletContext servletContext) Set the ServletContext that this object runs in.

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

getApplicationContext, getMessageSourceAccessor, initApplicationContext, obtainApplicationContext, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

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

Constructor Detail

WebApplicationObjectSupport

public WebApplicationObjectSupport()

Method Detail

setServletContext

public final void setServletContext(ServletContext servletContext)

Description copied from interface: ServletContextAware

Set the ServletContext that this object runs in.

Invoked after population of normal bean properties but before an init callback like InitializingBean's afterPropertiesSet or a custom init-method. Invoked after ApplicationContextAware's setApplicationContext.

Specified by:

setServletContext in interface ServletContextAware

Parameters:

servletContext - the ServletContext object to be used by this object

See Also:

InitializingBean.afterPropertiesSet(), ApplicationContextAware.setApplicationContext(org.springframework.context.ApplicationContext)

isContextRequired

protected boolean isContextRequired()

Overrides the base class behavior to enforce running in an ApplicationContext. All accessors will throw IllegalStateException if not running in a context.

Overrides:

isContextRequired in class ApplicationObjectSupport

See Also:

ApplicationObjectSupport.getApplicationContext(), ApplicationObjectSupport.getMessageSourceAccessor(), getWebApplicationContext(), getServletContext(), getTempDir()

initApplicationContext

protected void initApplicationContext(ApplicationContext context)

Calls initServletContext(javax.servlet.ServletContext) if the given ApplicationContext is a WebApplicationContext.

Overrides:

initApplicationContext in class ApplicationObjectSupport

Parameters:

context - the containing ApplicationContext

See Also:

ApplicationObjectSupport.setApplicationContext(org.springframework.context.ApplicationContext)

initServletContext

protected void initServletContext(ServletContext servletContext)

Subclasses may override this for custom initialization based on the ServletContext that this application object runs in.

The default implementation is empty. Called by initApplicationContext(org.springframework.context.ApplicationContext) as well as setServletContext(javax.servlet.ServletContext).

Parameters:

servletContext - the ServletContext that this application object runs in (never null)

getWebApplicationContext

@Nullable
protected final WebApplicationContext getWebApplicationContext()
                                                                  throws IllegalStateException

Return the current application context as WebApplicationContext.

NOTE: Only use this if you actually need to access WebApplicationContext-specific functionality. Preferably use getApplicationContext() or getServletContext() else, to be able to run in non-WebApplicationContext environments as well.

Throws:

IllegalStateException - if not running in a WebApplicationContext

See Also:

ApplicationObjectSupport.getApplicationContext()

getServletContext

@Nullable
protected final ServletContext getServletContext()
                                                    throws IllegalStateException

Return the current ServletContext.

Throws:

IllegalStateException - if not running within a required ServletContext

See Also:

isContextRequired()

getTempDir

protected final File getTempDir()
                         throws IllegalStateException

Return the temporary directory for the current web application, as provided by the servlet container.

Returns:

the File representing the temporary directory

Throws:

IllegalStateException - if not running within a ServletContext

See Also:

WebUtils.getTempDir(javax.servlet.ServletContext)