org.springframework.webflow.executor.jsf
Class DelegatingFlowVariableResolver

java.lang.Object
  javax.faces.el.VariableResolver
      org.springframework.webflow.executor.jsf.DelegatingFlowVariableResolver

public class DelegatingFlowVariableResolver
extends javax.faces.el.VariableResolver

Custom variable resolver that searches the current flow execution for variables to resolve. The search algorithm looks in flash scope first, then flow scope, then conversation scope. If no variable is found this resolver delegates to the next resolver in the chain. Suitable for use along side other variable resolvers to support EL binding expressions like {#bean.property} where "bean" could be a property in any supported scope. Consider combining use of this class with a Spring DelegatingVariableResolver to also support lazy-initialized binding variables managed by a Spring application context using custom bean scopes. Also consider such a Spring-backed managed bean facility as the sole-provider for centralized JSF managed bean references.

Author:

Keith Donald

Constructor Summary

DelegatingFlowVariableResolver(javax.faces.el.VariableResolver resolverDelegate)
Create a new FlowExecutionVariableResolver, using the given original VariableResolver.

Method Summary

protected javax.faces.el.VariableResolver	getResolverDelegate() Return the original VariableResolver that this resolver delegates to.
java.lang.Object	resolveVariable(javax.faces.context.FacesContext context, java.lang.String name)

Methods inherited from class java.lang.Object

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

Constructor Detail

DelegatingFlowVariableResolver

public DelegatingFlowVariableResolver(javax.faces.el.VariableResolver resolverDelegate)

Create a new FlowExecutionVariableResolver, 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:

resolverDelegate - the original VariableResolver

Method Detail

getResolverDelegate

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

Return the original VariableResolver that this resolver delegates to.

resolveVariable

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

Specified by:

resolveVariable in class javax.faces.el.VariableResolver

Throws:

javax.faces.el.EvaluationException