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DelegatingFacesELResolver (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.web.jsf.el
Class DelegatingFacesELResolver

java.lang.Object
  javax.el.ELResolver
      org.springframework.web.jsf.el.DelegatingFacesELResolver

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public class DelegatingFacesELResolver
extends javax.el.ELResolver

JSF 1.2 ELResolver that delegates to the Spring root WebApplicationContext, resolving name references to Spring-defined beans.

Configure this resolver in your faces-config.xml file as follows:

 <application>
   ...
   <el-resolver>org.springframework.web.jsf.el.DelegatingFacesELResolver</el-resolver>
 </application>

All your JSF expressions can then implicitly refer to the names of Spring-managed service layer beans, for example in property values of JSF-managed beans:

 <managed-bean>
   <managed-bean-name>myJsfManagedBean</managed-bean-name>
   <managed-bean-class>example.MyJsfManagedBean</managed-bean-class>
   <managed-bean-scope>session</managed-bean-scope>
   <managed-property>
     <property-name>mySpringManagedBusinessObject</property-name>
     <value>#{mySpringManagedBusinessObject}</value>
   </managed-property>
 </managed-bean>

with "mySpringManagedBusinessObject" defined as Spring bean in applicationContext.xml:

 <bean id="mySpringManagedBusinessObject" class="example.MySpringManagedBusinessObject">
   ...
 </bean>

Since:

2.1

Author:

Juergen Hoeller

See Also:

WebApplicationContextVariableResolver, FacesContextUtils.getRequiredWebApplicationContext(javax.faces.context.FacesContext)

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Field Summary
protected  Log	logger           Logger available to subclasses

 

Fields inherited from class javax.el.ELResolver
RESOLVABLE_AT_DESIGN_TIME, TYPE

 

Constructor Summary
DelegatingFacesELResolver()

 

Method Summary
protected  BeanFactory	getBeanFactory(javax.el.ELContext elContext)           Retrieve the Spring BeanFactory to delegate bean name resolution to.
Class<?>	getCommonPropertyType(javax.el.ELContext elContext, Object base)
Iterator<FeatureDescriptor>	getFeatureDescriptors(javax.el.ELContext elContext, Object base)
Class<?>	getType(javax.el.ELContext elContext, Object base, Object property)
Object	getValue(javax.el.ELContext elContext, Object base, Object property)
protected  WebApplicationContext	getWebApplicationContext(javax.el.ELContext elContext)           Retrieve the web application context to delegate bean name resolution to.
boolean	isReadOnly(javax.el.ELContext elContext, Object base, Object property)
void	setValue(javax.el.ELContext elContext, Object base, Object property, Object value)

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

logger

protected final Log logger

Logger available to subclasses

Constructor Detail

DelegatingFacesELResolver

public DelegatingFacesELResolver()

Method Detail

getValue

public Object getValue(javax.el.ELContext elContext,
                       Object base,
                       Object property)
                throws javax.el.ELException

Specified by:

getValue in class javax.el.ELResolver

Throws:

javax.el.ELException

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getType

public Class<?> getType(javax.el.ELContext elContext,
                        Object base,
                        Object property)
                 throws javax.el.ELException

Specified by:

getType in class javax.el.ELResolver

Throws:

javax.el.ELException

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setValue

public void setValue(javax.el.ELContext elContext,
                     Object base,
                     Object property,
                     Object value)
              throws javax.el.ELException

Specified by:

setValue in class javax.el.ELResolver

Throws:

javax.el.ELException

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isReadOnly

public boolean isReadOnly(javax.el.ELContext elContext,
                          Object base,
                          Object property)
                   throws javax.el.ELException

Specified by:

isReadOnly in class javax.el.ELResolver

Throws:

javax.el.ELException

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getFeatureDescriptors

public Iterator<FeatureDescriptor> getFeatureDescriptors(javax.el.ELContext elContext,
                                                         Object base)

Specified by:

getFeatureDescriptors in class javax.el.ELResolver

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getCommonPropertyType

public Class<?> getCommonPropertyType(javax.el.ELContext elContext,
                                      Object base)

Specified by:

getCommonPropertyType in class javax.el.ELResolver

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getBeanFactory

protected BeanFactory getBeanFactory(javax.el.ELContext elContext)

Retrieve the Spring BeanFactory to delegate bean name resolution to.

The default implementation delegates to getWebApplicationContext. Can be overridden to provide an arbitrary BeanFactory reference to resolve against; usually, this will be a full Spring ApplicationContext.

Parameters:

elContext - the current JSF ELContext

Returns:

the Spring BeanFactory (never null)

See Also:

getWebApplicationContext(javax.el.ELContext)

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getWebApplicationContext

protected WebApplicationContext getWebApplicationContext(javax.el.ELContext elContext)

Retrieve the web application context to delegate bean name resolution to.

The default implementation delegates to FacesContextUtils.

Parameters:

elContext - the current JSF ELContext

Returns:

the Spring web application context (never null)

See Also:

FacesContextUtils.getRequiredWebApplicationContext(javax.faces.context.FacesContext)

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