Added static constructor methods that make ObserverList construction

substantially less keystroke intensive.


git-svn-id: https://samskivert.googlecode.com/svn/trunk@2322 6335cc39-0255-0410-8fd6-9bcaacd3b74c

src/java/com/samskivert/swing/RadialMenu.java

@@ -673,6 +673,5 @@ public class RadialMenu
     protected MouseHijacker _hijacker;
 
     /** Maintains a list of action listeners. */
-    protected ObserverList<ActionListener> _actlist =
-        new ObserverList<ActionListener>(ObserverList.SAFE_IN_ORDER_NOTIFY);
+    protected ObserverList<ActionListener> _actlist = ObserverList.createSafeInOrder();
 }

src/java/com/samskivert/util/ObserverList.java

@@ -120,6 +120,33 @@ public class ObserverList<T> extends ArrayList<T>
      * in the list during a notification call. */
     public static final int FAST_UNSAFE_NOTIFY = 2;
 
+    /**
+     * A convenience method for creating an observer list that avoids duplicating the type
+     * parameter on the right hand side.
+     */
+    public static <T> ObserverList<T> createSafeInOrder ()
+    {
+        return new ObserverList<T>(SAFE_IN_ORDER_NOTIFY);
+    }
+
+    /**
+     * A convenience method for creating an observer list that avoids duplicating the type
+     * parameter on the right hand side.
+     */
+    public static <T> ObserverList<T> createFastUnsafe ()
+    {
+        return new ObserverList<T>(FAST_UNSAFE_NOTIFY);
+    }
+
+    /**
+     * A convenience method for creating an observer list that avoids duplicating the type
+     * parameter on the right hand side.
+     */
+    public static <T> ObserverList<T> create (int notifyPolicy, boolean allowDups)
+    {
+        return new ObserverList<T>(notifyPolicy, allowDups);
+    }
+
     /**
      * Creates an empty observer list with the supplied notification
      * policy and that only allows observers to observe the list once.

src/java/com/samskivert/util/tests/ObserverListTest.java

@@ -38,10 +38,12 @@ public class ObserverListTest extends TestCase
     public void runTest ()
     {
 //         Log.info("Testing safe list.");
-        testList(new ObserverList<TestObserver>(ObserverList.SAFE_IN_ORDER_NOTIFY));
+        ObserverList<TestObserver> list = ObserverList.createSafeInOrder();
+        testList(list);
 
 //         Log.info("Testing unsafe list.");
-        testList(new ObserverList<TestObserver>(ObserverList.FAST_UNSAFE_NOTIFY));
+        list = ObserverList.createFastUnsafe();
+        testList(list);
     }
 
     public void testList (final ObserverList<TestObserver> list)