Added initBuilder() hook method to AbstractFlowBuilder.

spring-webflow/changelog.txt

@@ -23,6 +23,7 @@ Package org.springframework.webflow.conversation
 
 Package org.springframework.webflow.engine
 * Added invoke(String, Action) method to AbstractFlowBuilder.
+* Added initBuilder() hook method to AbstractFlowBuilder.
 
 Package org.springframework.webflow.execution
 * Added a holder for the FlowExecutionContext of a request (SWF-163).

spring-webflow/src/main/java/org/springframework/webflow/engine/builder/AbstractFlowBuilder.java

@@ -185,6 +185,7 @@ public abstract class AbstractFlowBuilder extends BaseFlowBuilder {
 
 	public void init(String flowId, AttributeMap attributes) throws FlowBuilderException {
 		setFlow(getFlowArtifactFactory().createFlow(flowId, flowAttributes().union(attributes)));
+		initBuilder();
 	}
 
 	/**
@@ -196,6 +197,15 @@ public abstract class AbstractFlowBuilder extends BaseFlowBuilder {
 	protected AttributeMap flowAttributes() {
 		return CollectionUtils.EMPTY_ATTRIBUTE_MAP;
 	}
+	
+	/**
+	 * Hook method subclasses can override to initialize the flow builder.
+	 * Will be called by {@link #init(String, AttributeMap)} after
+	 * creating the initial Flow object. As a consequence, {@link #getFlow()}
+	 * can be called to retrieve the Flow object under construction.
+	 */
+	protected void initBuilder() {
+	}
 
 	// view state