# HG changeset patch
# User Jaroslav Tulach <jtulach@netbeans.org>
# Date 1443963301 -7200
# Node ID 2ea65c6d3a8b83fd0f058a41a9728b50d6f3aee8
# Parent  a0f79e32d5269a5a69be572215096f8e01151f18
#255677: Keep reference to Knockout object until its model object is GCed

diff -r a0f79e32d526 -r 2ea65c6d3a8b ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java
--- a/ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java	Fri Oct 02 08:57:14 2015 +0200
+++ b/ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java	Sun Oct 04 14:55:01 2015 +0200
@@ -66,6 +66,10 @@
     
     @Override
     public Object wrapModel(Object model, PropertyBinding[] propArr, FunctionBinding[] funcArr) {
+        return createKO(model, propArr, funcArr, null);
+    }
+
+    final Object createKO(Object model, PropertyBinding[] propArr, FunctionBinding[] funcArr, Knockout[] ko) {
         String[] propNames = new String[propArr.length];
         boolean[] propReadOnly = new boolean[propArr.length];
         Object[] propValues = new Object[propArr.length];
@@ -83,8 +87,12 @@
             funcNames[i] = funcArr[i].getFunctionName();
         }
         Object ret = getJSObject();
-        new Knockout(model, ret, propArr, funcArr).wrapModel(
-            ret, 
+        Knockout newKO = new Knockout(model, ret, propArr, funcArr);
+        if (ko != null) {
+            ko[0] = newKO;
+        }
+        newKO.wrapModel(
+            ret,
             propNames, propReadOnly, propValues,
             funcNames
         );
diff -r a0f79e32d526 -r 2ea65c6d3a8b ko4j/src/main/java/org/netbeans/html/ko4j/Knockout.java
--- a/ko4j/src/main/java/org/netbeans/html/ko4j/Knockout.java	Fri Oct 02 08:57:14 2015 +0200
+++ b/ko4j/src/main/java/org/netbeans/html/ko4j/Knockout.java	Sun Oct 04 14:55:01 2015 +0200
@@ -44,6 +44,9 @@
 
 import java.lang.ref.ReferenceQueue;
 import java.lang.ref.WeakReference;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
 import net.java.html.js.JavaScriptBody;
 import net.java.html.js.JavaScriptResource;
 import net.java.html.json.Model;
@@ -62,6 +65,7 @@
 @JavaScriptResource("knockout-3.2.0.debug.js")
 final class Knockout extends WeakReference<Object> {
     private static final ReferenceQueue<Object> QUEUE = new ReferenceQueue();
+    private static final Set<Knockout> active = Collections.synchronizedSet(new HashSet<Knockout>());
     
     private PropertyBinding[] props;
     private FunctionBinding[] funcs;
@@ -79,6 +83,7 @@
         for (int i = 0; i < funcs.length; i++) {
             this.funcs[i] = funcs[i].weak();
         }
+        active.add(this);
     }
     
     static void cleanUp() {
@@ -87,6 +92,7 @@
             if (ko == null) {
                 return;
             }
+            active.remove(ko);
             clean(ko.js);
             ko.js = null;
             ko.props = null;