org.springframework.web.servlet.view
Class XmlViewResolver

java.lang.Object
  extended by org.springframework.context.support.ApplicationObjectSupport
      extended by org.springframework.web.context.support.WebApplicationObjectSupport
          extended by org.springframework.web.servlet.view.AbstractCachingViewResolver
              extended by 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 java.lang.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  java.lang.Object getCacheKey(java.lang.String viewName, java.util.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(java.lang.String viewName, java.util.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, initApplicationContext, initServletContext, 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 java.lang.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 java.lang.Object getCacheKey(java.lang.String viewName,
                                       java.util.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(java.lang.String viewName,
                        java.util.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