org.springframework.web.servlet.view
Class XmlViewResolver

java.lang.Object
  org.springframework.context.support.ApplicationObjectSupport
      org.springframework.web.context.support.WebApplicationObjectSupport
          org.springframework.web.servlet.view.AbstractCachingViewResolver
              org.springframework.web.servlet.view.XmlViewResolver

All Implemented Interfaces:

DisposableBean, ApplicationContextAware, Ordered, ServletContextAware, ViewResolver

public class XmlViewResolver
extends AbstractCachingViewResolver
implements Ordered, DisposableBean

Implementation of ViewResolver that uses bean definitions in an XML file, specified by resource location. The file will typically be located in the WEB-INF directory; default is "/WEB-INF/views.xml".

This ViewResolver does not support internationalization. Consider ResourceBundleViewResolver if you need to apply different view resources per locale.

Note: This ViewResolver implements the Ordered interface to allow for flexible participation in ViewResolver chaining. For example, some special views could be defined via this ViewResolver (giving it 0 as "order" value), while all remaining views could be resolved by a UrlBasedViewResolver.

Since:

18.06.2003

Author:

Juergen Hoeller

See Also:

ResourceLoader.getResource(java.lang.String), ResourceBundleViewResolver, UrlBasedViewResolver

Field Summary

static String

DEFAULT_LOCATION Default if no other location is supplied

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

logger

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

XmlViewResolver()

Method Summary

void	destroy() Close the view bean factory on context shutdown.
protected Object	getCacheKey(String viewName, Locale locale) This implementation returns just the view name, as XmlViewResolver doesn't support localized resolution.
int	getOrder() Return the order value of this object, with a higher value meaning greater in terms of sorting.
protected void	initApplicationContext() Pre-initialize the factory from the XML file.
protected BeanFactory	initFactory() Initialize the view bean factory from the XML file.
protected View	loadView(String viewName, Locale locale) Subclasses must implement this method, building a View object for the specified view.
void	setLocation(Resource location) Set the location of the XML file that defines the view beans.
void	setOrder(int order)

Methods inherited from class org.springframework.web.servlet.view.AbstractCachingViewResolver

clearCache, createView, isCache, removeFromCache, resolveViewName, setCache

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

getServletContext, getTempDir, getWebApplicationContext, isContextRequired, setServletContext

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

Field Detail

DEFAULT_LOCATION

public static final String DEFAULT_LOCATION

Default if no other location is supplied

See Also:

Constant Field Values

Constructor Detail

XmlViewResolver

public XmlViewResolver()

Method Detail

setOrder

public void setOrder(int order)

getOrder

public int getOrder()

Description copied from interface: Ordered

Return the order value of this object, with a higher value meaning greater in terms of sorting.

Normally starting with 0 or 1, with Ordered.LOWEST_PRECEDENCE indicating greatest. Same order values will result in arbitrary positions for the affected objects.

Higher value can be interpreted as lower priority, consequently the first object has highest priority (somewhat analogous to Servlet "load-on-startup" values).

Note that order values below 0 are reserved for framework purposes. Application-specified values should always be 0 or greater, with only framework components (internal or third-party) supposed to use lower values.

Specified by:

getOrder in interface Ordered

Returns:

the order value

See Also:

Ordered.LOWEST_PRECEDENCE

setLocation

public void setLocation(Resource location)

Set the location of the XML file that defines the view beans.

The default is "/WEB-INF/views.xml".

Parameters:

location - the location of the XML file.

initApplicationContext

protected void initApplicationContext()
                               throws BeansException

Pre-initialize the factory from the XML file. Only effective if caching is enabled.

Overrides:

initApplicationContext in class ApplicationObjectSupport

Throws:

ApplicationContextException - in case of initialization errors

BeansException - if thrown by ApplicationContext methods

See Also:

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

getCacheKey

protected Object getCacheKey(String viewName,
                             Locale locale)

This implementation returns just the view name, as XmlViewResolver doesn't support localized resolution.

Overrides:

getCacheKey in class AbstractCachingViewResolver

loadView

protected View loadView(String viewName,
                        Locale locale)
                 throws BeansException

Description copied from class: AbstractCachingViewResolver

Subclasses must implement this method, building a View object for the specified view. The returned View objects will be cached by this ViewResolver base class.

Subclasses are not forced to support internationalization: A subclass that does not may simply ignore the locale parameter.

Specified by:

loadView in class AbstractCachingViewResolver

Parameters:

viewName - the name of the view to retrieve

locale - the Locale to retrieve the view for

Returns:

the View instance, or null if not found (optional, to allow for ViewResolver chaining)

Throws:

BeansException

See Also:

AbstractCachingViewResolver.resolveViewName(java.lang.String, java.util.Locale)

initFactory

protected BeanFactory initFactory()
                           throws BeansException

Initialize the view bean factory from the XML file. Synchronized because of access by parallel threads.

Throws:

BeansException - in case of initialization errors

destroy

public void destroy()
             throws BeansException

Close the view bean factory on context shutdown.

Specified by:

destroy in interface DisposableBean

Throws:

BeansException