From 403200041e41fbae1d534a1b67d72b6227b5e02a Mon Sep 17 00:00:00 2001
From: "andrzej@threerings.net"
 <andrzej@threerings.net@6335cc39-0255-0410-8fd6-9bcaacd3b74c>
Date: Thu, 28 Aug 2008 22:51:56 +0000
Subject: [PATCH] Added prune method to remove collected observers from list.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@2373 6335cc39-0255-0410-8fd6-9bcaacd3b74c
---
 src/java/com/samskivert/util/WeakObserverList.java | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/java/com/samskivert/util/WeakObserverList.java b/src/java/com/samskivert/util/WeakObserverList.java
index 2ac12495..e6a9c817 100644
--- a/src/java/com/samskivert/util/WeakObserverList.java
+++ b/src/java/com/samskivert/util/WeakObserverList.java
@@ -178,6 +178,18 @@ public class WeakObserverList<T> extends AbstractList<T>
         _wrappedList.apply(_derefOp);
     }
 
+    /**
+     * Removes all garbage-collected observers from the list.
+     */
+    public void prune ()
+    {
+        for (int ii = _wrappedList.size() - 1; ii >= 0; ii--) {
+            if (_wrappedList.get(ii).get() == null) {
+                _wrappedList.remove(ii);
+            }
+        }
+    }
+
     /**
      * An operation that resolves a reference and applies a wrapped op.
      */