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:

Aware, DisposableBean, InitializingBean, ApplicationContextAware, Ordered, ServletContextAware, ViewResolver

public class XmlViewResolver
extends AbstractCachingViewResolver
implements Ordered, InitializingBean, DisposableBean

A ViewResolver implementation that uses bean definitions in a dedicated XML file for view definitions, specified by resource location. The file will typically be located in the WEB-INF directory; the default is "/WEB-INF/views.xml".

This ViewResolver does not support internationalization at the level of its definition resources. Consider ResourceBundleViewResolver if you need to apply different view resources per locale.

Note: This ViewResolver implements the Ordered interface in order 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

Fields

Modifier and Type	Field and Description
static String	DEFAULT_LOCATION Default if no other location is supplied.

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

DEFAULT_CACHE_LIMIT

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

logger

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor and Description
XmlViewResolver()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet() Pre-initialize the factory from the XML file.
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() Get the order value of this object.
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) Specify the order value for this ViewResolver bean.

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

clearCache, createView, getCacheLimit, isCache, isCacheUnresolved, removeFromCache, resolveViewName, setCache, setCacheLimit, setCacheUnresolved

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

getServletContext, getTempDir, getWebApplicationContext, initApplicationContext, initServletContext, isContextRequired, setServletContext

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

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

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.

setOrder

public void setOrder(int order)

Specify the order value for this ViewResolver bean.

The default value is Ordered.LOWEST_PRECEDENCE, meaning non-ordered.

See Also:

Ordered.getOrder()

getOrder

public int getOrder()

Description copied from interface: Ordered

Get the order value of this object.

Higher values are interpreted as lower priority. As a consequence, the object with the lowest value has the highest priority (somewhat analogous to Servlet load-on-startup values).

Same order values will result in arbitrary sort positions for the affected objects.

Specified by:

getOrder in interface Ordered

Returns:

the order value

See Also:

Ordered.HIGHEST_PRECEDENCE, Ordered.LOWEST_PRECEDENCE

afterPropertiesSet

public void afterPropertiesSet()
                        throws BeansException

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

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

BeansException

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