org.springframework.web.servlet.view
Class ResourceBundleViewResolver

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.ResourceBundleViewResolver

All Implemented Interfaces:

DisposableBean, ApplicationContextAware, Ordered, ServletContextAware, ViewResolver

public class ResourceBundleViewResolver
extends AbstractCachingViewResolver
implements Ordered, DisposableBean

ViewResolver implementation that uses bean definitions in a ResourceBundle, specified by the bundle basename.

The bundle is typically defined in a properties file, located in the class path. The default bundle basename is "views".

This ViewResolver supports localized view definitions, using the default support of PropertyResourceBundle. For example, the basename "views" will be resolved as class path resources "views_de_AT.properties", "views_de.properties", "views.properties" - for a given Locale "de_AT".

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.

Author:

Rod Johnson, Juergen Hoeller

See Also:

ResourceBundle.getBundle(java.lang.String), PropertyResourceBundle, UrlBasedViewResolver

Field Summary

static String

DEFAULT_BASENAME The default basename if no other basename 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

ResourceBundleViewResolver()

Method Summary

void	destroy() Close the bundle bean factories on context shutdown.
protected ResourceBundle	getBundle(String basename, Locale locale) Obtain the resource bundle for the given basename and Locale.
protected ClassLoader	getBundleClassLoader() Return the ClassLoader to load resource bundles with.
int	getOrder() Return the order value of this object, with a higher value meaning greater in terms of sorting.
protected BeanFactory	initFactory(Locale locale) Initialize the BeanFactory from the ResourceBundle, for the given locale.
protected View	loadView(String viewName, Locale locale) Subclasses must implement this method.
void	setBasename(String basename) Set the basename, as defined in the ResourceBundle documentation.
void	setBasenames(String[] basenames) Set multiple ResourceBundle basenames.
void	setBundleClassLoader(ClassLoader classLoader) Set the ClassLoader to load resource bundles with.
void	setDefaultParentView(String defaultParentView) Set the default parent for views defined in the ResourceBundle.
void	setOrder(int order)

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

clearCache, createView, getCacheKey, 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, initApplicationContext, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BASENAME

public static final String DEFAULT_BASENAME

The default basename if no other basename is supplied.

See Also:

Constant Field Values

Constructor Detail

ResourceBundleViewResolver

public ResourceBundleViewResolver()

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

setBasename

public void setBasename(String basename)

Set the basename, as defined in the ResourceBundle documentation.

ResourceBundle supports different suffixes. For example, a base name of "views" might map to ResourceBundle files "views", "views_en_au" and "views_de".

The default is "views".

Parameters:

basename - the ResourceBundle basename

See Also:

setBasenames(java.lang.String[]), ResourceBundle

setBasenames

public void setBasenames(String[] basenames)

Set multiple ResourceBundle basenames.

Parameters:

basenames - multiple ResourceBundle basenames

See Also:

setBasename(java.lang.String)

setBundleClassLoader

public void setBundleClassLoader(ClassLoader classLoader)

Set the ClassLoader to load resource bundles with. Default is the thread context ClassLoader.

Parameters:

classLoader - the ClassLoader to load resource bundles with

getBundleClassLoader

protected ClassLoader getBundleClassLoader()

Return the ClassLoader to load resource bundles with.

Default is the specified bundle ClassLoader, usually the thread context ClassLoader.

Returns:

the ClassLoader to load resource bundles with

setDefaultParentView

public void setDefaultParentView(String defaultParentView)

Set the default parent for views defined in the ResourceBundle.

This avoids repeated "yyy1.(parent)=xxx", "yyy2.(parent)=xxx" definitions in the bundle, especially if all defined views share the same parent.

The parent will typically define the view class and common attributes. Concrete views might simply consist of an URL definition then: a la "yyy1.url=/my.jsp", "yyy2.url=/your.jsp".

View definitions that define their own parent or carry their own class can still override this. Strictly speaking, the rule that a default parent setting does not apply to a bean definition that carries a class is there for backwards compatiblity reasons. It still matches the typical use case.

Parameters:

defaultParentView - the default parent view

loadView

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

Description copied from class: AbstractCachingViewResolver

Subclasses must implement this method. There need be no concern for efficiency, as this class will cache views.

Not all subclasses may support internationalization: A subclass that doesn't can simply ignore the locale parameter.

NOTE: As of Spring 1.2, subclasses are supposed to fully initialize the View objects before returning them, also applying bean container initialization callbacks.

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:

Exception - if the view couldn't be resolved

See Also:

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

initFactory

protected BeanFactory initFactory(Locale locale)
                           throws Exception

Initialize the BeanFactory from the ResourceBundle, for the given locale.

Synchronized because of access by parallel threads.

Parameters:

locale - the target Locale

Throws:

Exception

getBundle

protected ResourceBundle getBundle(String basename,
                                   Locale locale)
                            throws MissingResourceException

Obtain the resource bundle for the given basename and Locale.

Parameters:

basename - the basename to look for

locale - the Locale to look for

Returns:

the corresponding ResourceBundle

Throws:

MissingResourceException - if no matching bundle could be found

See Also:

ResourceBundle.getBundle(String, java.util.Locale, ClassLoader)

destroy

public void destroy()
             throws BeansException

Close the bundle bean factories on context shutdown.

Specified by:

destroy in interface DisposableBean

Throws:

BeansException