Removed no-arg constructor from UsernamePasswordAuthenticationToken.

core/src/main/java/org/acegisecurity/providers/UsernamePasswordAuthenticationToken.java

@@ -78,10 +78,6 @@ public class UsernamePasswordAuthenticationToken
         this.authenticated = true;
     }
 
-    protected UsernamePasswordAuthenticationToken() {
-        throw new IllegalArgumentException("Cannot use default constructor");
-    }
-
     //~ Methods ================================================================
 
     public void setAuthenticated(boolean isAuthenticated)

core/src/test/java/org/acegisecurity/providers/UsernamePasswordAuthenticationTokenTests.java

@@ -88,11 +88,13 @@ public class UsernamePasswordAuthenticationTokenTests extends TestCase {
         assertEquals("ROLE_TWO", token.getAuthorities()[1].getAuthority());
     }
 
-    public void testNoArgConstructor() {
+    public void testNoArgConstructorDoesntExist() {
+        Class clazz = UsernamePasswordAuthenticationToken.class;
+
         try {
-            new UsernamePasswordAuthenticationToken();
-            fail("Should have thrown IllegalArgumentException");
-        } catch (IllegalArgumentException expected) {
+            clazz.getDeclaredConstructor(null);
+            fail("Should have thrown NoSuchMethodException");
+        } catch (NoSuchMethodException expected) {
             assertTrue(true);
         }
     }