org.springframework.web.jsf
Class DelegatingVariableResolver

java.lang.Object
  javax.faces.el.VariableResolver
      org.springframework.web.jsf.DelegatingVariableResolver

public class DelegatingVariableResolver

extends javax.faces.el.VariableResolver

JSF VariableResolver that first delegates to the original resolver of the underlying JSF implementation, then to the Spring root WebApplicationContext.

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

 <application>
   ...
   <variable-resolver>org.springframework.web.jsf.DelegatingVariableResolver</variable-resolver>
 </application>

All your JSF expressions can then implicitly refer to the names of Spring-managed middle tier 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>

Note: Spring's JSF support has been developed and tested against JSF 1.1. Unfortunately, the JSF 1.1 RI (as of June 2004) does not apply a custom VariableResolver to property values of JSF-managed beans: This has to be considered a bug, as it is supposed to work according to the JSF spec. It does work in MyFaces 1.0.5, for example.

Since:

1.1

Author:

Juergen Hoeller

See Also:

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

Field Summary

protected Log	logger
protected javax.faces.el.VariableResolver	originalVariableResolver

Constructor Summary

DelegatingVariableResolver(javax.faces.el.VariableResolver originalVariableResolver)
Create a new DelegatingVariableResolver, using the given original VariableResolver.

Method Summary

protected javax.faces.el.VariableResolver	getOriginalVariableResolver() Return the original VariableResolver that this resolver delegates to.
protected WebApplicationContext	getWebApplicationContext(javax.faces.context.FacesContext facesContext) Retrieve the web application context to delegate bean name resolution to.
Object	resolveVariable(javax.faces.context.FacesContext facesContext, String name)

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

originalVariableResolver

protected final javax.faces.el.VariableResolver originalVariableResolver

Constructor Detail

DelegatingVariableResolver

public DelegatingVariableResolver(javax.faces.el.VariableResolver originalVariableResolver)

Create a new DelegatingVariableResolver, using the given original VariableResolver.

A JSF implementation will automatically pass its original resolver into the constructor of a configured resolver, provided that there is a corresponding constructor argument.

Parameters:

originalVariableResolver - the original VariableResolver

Method Detail

getOriginalVariableResolver

protected final javax.faces.el.VariableResolver getOriginalVariableResolver()

Return the original VariableResolver that this resolver delegates to.

resolveVariable

public Object resolveVariable(javax.faces.context.FacesContext facesContext,
                              String name)
                       throws javax.faces.el.EvaluationException

Throws:

javax.faces.el.EvaluationException

getWebApplicationContext

protected WebApplicationContext getWebApplicationContext(javax.faces.context.FacesContext facesContext)

Retrieve the web application context to delegate bean name resolution to. Default implementation delegates to FacesContextUtils.

Parameters:

facesContext - the current JSF context

Returns:

the Spring web application context

See Also:

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