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support for end-state expressions

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This commit is contained in:
Keith Donald
2007-04-07 20:41:47 +00:00
parent d379c00509
commit d991b96e9d
1 changed files with 24 additions and 22 deletions
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46
spring-webflow/src/main/java/org/springframework/webflow/executor/jsf/DelegatingFlowVariableResolver.java
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@@ -24,15 +24,15 @@ import org.springframework.webflow.execution.FlowExecution;
/**
* 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.
* 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 {@link 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.
* Consider combining use of this class with a Spring {@link 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
*/
@@ -62,26 +62,28 @@ public class DelegatingFlowVariableResolver extends VariableResolver {
return resolverDelegate;
}
/**
* Check flash/flow/conversation scope. If the variable is not found, delegate to next variable resolver in the
* chain.
*/
public Object resolveVariable(FacesContext context, String name) throws EvaluationException {
FlowExecution execution = FlowExecutionHolderUtils.getCurrentFlowExecution(context);
// flow execution must be present and active (note: which means variables cannot be resolved from end-state views)
if (execution != null && execution.isActive()) {
// try flash/flow/conversation
if (execution.getActiveSession().getFlashMap().contains(name)) {
return execution.getActiveSession().getFlashMap().get(name);
}
else if (execution.getActiveSession().getScope().contains(name)) {
return execution.getActiveSession().getScope().get(name);
}
else if (execution.getConversationScope().contains(name)) {
return execution.getConversationScope().get(name);
if (execution != null) {
if (execution.isActive()) {
// flow execution is active: try flash/flow/conversation scope
if (execution.getActiveSession().getFlashMap().contains(name)) {
return execution.getActiveSession().getFlashMap().get(name);
}
else if (execution.getActiveSession().getScope().contains(name)) {
return execution.getActiveSession().getScope().get(name);
}
else if (execution.getConversationScope().contains(name)) {
return execution.getConversationScope().get(name);
}
} else {
// flow execution has ended: check for end-state attributes exposed in the request map
if (context.getExternalContext().getRequestMap().containsKey(name)) {
return context.getExternalContext().getRequestMap().get(name);
}
}
}
// no active flow execution bound or flow execution attribute found with that name - delegate
return resolverDelegate.resolveVariable(context, name);
// no flow execution bound or flow execution attribute found with that name - delegate
return resolverDelegate.resolveVariable(context, name);
}
}