--- android/TrainInfo/src/dk/thoerup/traininfo/util/AndroidTimeoutCache.java	2010/09/02 18:37:49	1026
+++ android/TrainInfo/src/dk/thoerup/traininfo/util/AndroidTimeoutCache.java	2010/09/08 06:03:45	1027
@@ -23,6 +23,18 @@
 		this.timeout = timeout; 
 	}
 	
+	public void purgeOldEntries() {
+		
+		long now = android.os.SystemClock.elapsedRealtime();
+		
+		for (K key : cache.keySet()) {
+			CacheItem<V> item = cache.get(key);
+			if ( (item.lastupdate+timeout) < now) { //item too old
+				cache.remove(key);
+			}
+		}
+	}
+	
 	public void put(K k, V v) {
 		CacheItem<V> item= new CacheItem<V>(v);
 		cache.put(k, item);