From b57b6b1b31169c38d9a83e9a0609e014562b3508 Mon Sep 17 00:00:00 2001
From: Andy2 <andy2@trand>
Date: Mon, 28 Feb 2011 05:41:02 -0800
Subject: [PATCH] replace array[1] with HashSet to support more than one db
 change listener

---
 .../src/org/eehouse/android/xw4/DBUtils.java  | 23 ++++++++++++++-----
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/xwords4/android/XWords4/src/org/eehouse/android/xw4/DBUtils.java b/xwords4/android/XWords4/src/org/eehouse/android/xw4/DBUtils.java
index 188ddc342..90566f583 100644
--- a/xwords4/android/XWords4/src/org/eehouse/android/xw4/DBUtils.java
+++ b/xwords4/android/XWords4/src/org/eehouse/android/xw4/DBUtils.java
@@ -28,6 +28,8 @@ import java.util.StringTokenizer;
 import android.content.ContentValues;
 import java.util.ArrayList;
 import java.util.Date;
+import java.util.HashSet;
+import java.util.Iterator;
 import junit.framework.Assert;
 
 import org.eehouse.android.xw4.jni.*;
@@ -38,8 +40,8 @@ public class DBUtils {
     public static interface DBChangeListener {
         public void pathSaved( String path );
     }
-    private static DBChangeListener[] s_listeners = 
-        new DBChangeListener[]{ null };
+    private static HashSet<DBChangeListener> s_listeners = 
+        new HashSet<DBChangeListener>();
 
     private static SQLiteOpenHelper s_dbHelper = null;
 
@@ -569,8 +571,16 @@ public class DBUtils {
     public static void setDBChangeListener( DBChangeListener listener )
     {
         synchronized( s_listeners ) {
-            Assert.assertTrue( listener != s_listeners[0] );
-            s_listeners[0] = listener;
+            Assert.assertNotNull( listener );
+            s_listeners.add( listener );
+        }
+    }
+
+    public static void clearDBChangeListener( DBChangeListener listener )
+    {
+        synchronized( s_listeners ) {
+            Assert.assertTrue( s_listeners.contains( listener ) );
+            s_listeners.remove( listener );
         }
     }
 
@@ -633,8 +643,9 @@ public class DBUtils {
     private static void notifyListeners( String path )
     {
         synchronized( s_listeners ) {
-            if ( null != s_listeners[0] ) {
-                s_listeners[0].pathSaved( path );
+            Iterator<DBChangeListener> iter = s_listeners.iterator();
+            while ( iter.hasNext() ) {
+                iter.next().pathSaved( path );
             }
         }
     }