Fix broken test caused by null application context in AbtractAccessDecisionManager when auto-detection of voters is called.

core/src/main/java/org/acegisecurity/vote/AbstractAccessDecisionManager.java

@@ -38,7 +38,7 @@ import org.springframework.util.Assert;
 
 /**
  * Abstract implementation of {@link AccessDecisionManager}.
- * <p>
+ * <p/>
  * Handles configuration of a bean context defined list of
  * {@link AccessDecisionVoter}s and the access control behaviour if all voters
  * abstain from voting (defaults to deny access).
@@ -55,15 +55,13 @@ public abstract class AbstractAccessDecisionManager implements AccessDecisionMan
 
     private boolean allowIfAllAbstainDecisions = false;
 
-	private boolean isSetDecisionVotersInvoked = false;
-
     private ApplicationContext applicationContext;
 
     // ~ Methods
     // ========================================================================================================
 
     public void afterPropertiesSet() throws Exception {
-		if (!isSetDecisionVotersInvoked) {
+        if (decisionVoters == null || decisionVoters.isEmpty()) {
             autoDetectVoters();
         }
         Assert.notEmpty(this.decisionVoters, "A list of AccessDecisionVoters is required");
@@ -71,8 +69,10 @@ public abstract class AbstractAccessDecisionManager implements AccessDecisionMan
     }
 
     private void autoDetectVoters() {
+        Assert.notNull(applicationContext, "Auto-detection of voters requires an application context");
         Map map = this.applicationContext.getBeansOfType(AccessDecisionVoter.class);
         List list = new ArrayList();
+
         for (Iterator it = map.values().iterator(); it.hasNext();) {
             list.add((it.next()));
         }
@@ -100,24 +100,15 @@ public abstract class AbstractAccessDecisionManager implements AccessDecisionMan
     }
 
     public void setDecisionVoters(List newList) {
-		isSetDecisionVotersInvoked = true;
         Assert.notEmpty(newList);
 
         Iterator iter = newList.iterator();
 
         while (iter.hasNext()) {
-			Object currentObject = null;
-
-			try {
-				currentObject = iter.next();
-
-				AccessDecisionVoter attemptToCast = (AccessDecisionVoter) currentObject;
-			}
-			catch (ClassCastException cce) {
-				throw new IllegalArgumentException("AccessDecisionVoter " + currentObject.getClass().getName()
+            Object currentObject = iter.next();
+            Assert.isInstanceOf(AccessDecisionVoter.class, currentObject, "AccessDecisionVoter " + currentObject.getClass().getName()
                     + " must implement AccessDecisionVoter");
         }
-		}
 
         this.decisionVoters = newList;
     }
@@ -143,13 +134,12 @@ public abstract class AbstractAccessDecisionManager implements AccessDecisionMan
     /**
      * Iterates through all <code>AccessDecisionVoter</code>s and ensures
      * each can support the presented class.
-	 * <p>
+     * <p/>
      * If one or more voters cannot support the presented class,
      * <code>false</code> is returned.
      * </p>
      *
      * @param clazz DOCUMENT ME!
-	 * 
      * @return DOCUMENT ME!
      */
     public boolean supports(Class clazz) {
@@ -169,5 +159,4 @@ public abstract class AbstractAccessDecisionManager implements AccessDecisionMan
     public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
         this.applicationContext = applicationContext;
 	}
-
 }