jdk 1.4 compat

spring-webflow/src/main/java/org/springframework/webflow/execution/Event.java

@@ -73,7 +73,7 @@ public class Event extends EventObject {
 		super(source);
 		Assert.hasText(id, "The event id is required: please set this event's id to a non-blank string identifier");
 		this.id = id;
-		this.attributes = (attributes != null ? attributes : CollectionUtils.EMPTY_ATTRIBUTE_MAP);
+		this.attributes = attributes != null ? attributes : CollectionUtils.EMPTY_ATTRIBUTE_MAP;
 	}
 
 	/**

spring-webflow/src/main/java/org/springframework/webflow/mvc/builder/DelegatingFlowViewResolver.java

@@ -15,6 +15,7 @@
  */
 package org.springframework.webflow.mvc.builder;
 
+import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 
@@ -39,7 +40,7 @@ public class DelegatingFlowViewResolver implements FlowViewResolver {
 	 * @param viewResolvers the Spring MVC view resolver chain to delegate to
 	 */
 	public DelegatingFlowViewResolver(List viewResolvers) {
-		this.viewResolvers = viewResolvers;
+		this.viewResolvers = viewResolvers != null ? viewResolvers : Collections.EMPTY_LIST;
 	}
 
 	public View resolveView(String viewId, RequestContext context) {
@@ -51,7 +52,10 @@ public class DelegatingFlowViewResolver implements FlowViewResolver {
 					return view;
 				}
 			} catch (Exception e) {
-				throw new IllegalStateException("Exception resolving view with name '" + viewId + "'", e);
+				IllegalStateException ise = new IllegalStateException("Exception resolving view with name '" + viewId
+						+ "'");
+				ise.initCause(e);
+				throw ise;
 			}
 		}
 		return null;