make clear() only clear entries that aren't locked.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@952 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/src/java/com/samskivert/util/LockableLRUHashMap.java

@@ -1,5 +1,5 @@
 //
-// $Id: LockableLRUHashMap.java,v 1.1 2002/11/15 01:50:46 ray Exp $
+// $Id: LockableLRUHashMap.java,v 1.2 2002/11/26 21:14:36 ray Exp $
 
 package com.samskivert.util;
 
@@ -21,6 +21,21 @@ public class LockableLRUHashMap extends LRUHashMap
         super(baseMaxSize);
     }
 
+    /**
+     * Clear all entries but those that are currently locked.
+     */
+    public void clear ()
+    {
+        // unfortunately there's not a better way to do this because all the
+        // appropriate variables have package access
+        Object[] keys = keySet().toArray();
+        for (int ii=0, nn=keys.length; ii < nn; ii++) {
+            if (! _locks.contains(keys[ii])) {
+                remove(keys[ii]);
+            }
+        }
+    }
+
     /**
      * Lock the specified key from being removed.
      * This has the side effect of increasing the maximum size by 1.