# HG changeset patch
# User Jaroslav Tulach <jtulach@netbeans.org>
# Date 1456167512 -3600
# Node ID c61d247f087a04b34f8ec5fca89252dbd4a40f2f
# Parent  4c40ceb185e5d6b7b447279c4ad6fe760a596f22
#258088: Non-mutable values aren't wrapped into ko.observable, but rather stored as primitive values

diff -r 4c40ceb185e5 -r c61d247f087a json-tck/src/main/java/net/java/html/json/tests/KnockoutTest.java
--- a/json-tck/src/main/java/net/java/html/json/tests/KnockoutTest.java	Mon Feb 22 06:09:33 2016 +0100
+++ b/json-tck/src/main/java/net/java/html/json/tests/KnockoutTest.java	Mon Feb 22 19:58:32 2016 +0100
@@ -73,14 +73,14 @@
     @Property(name="choice", type=KnockoutTest.Choice.class),
     @Property(name="archetype", type=ArchetypeData.class),
     @Property(name="archetypes", type=ArchetypeData.class, array = true),
-}) 
+})
 public final class KnockoutTest {
     private KnockoutModel js;
-    
+
     enum Choice {
         A, B;
     }
-    
+
     @ComputedProperty static List<Integer> resultLengths(List<String> results) {
         Integer[] arr = new Integer[results.size()];
         for (int i = 0; i < arr.length; i++) {
@@ -88,9 +88,9 @@
         }
         return Arrays.asList(arr);
     }
-    
+
     @KOTest public void modifyValueAssertChangeInModelOnEnum() throws Throwable {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "Latitude: <input id='input' data-bind=\"value: choice\"></input>\n"
         );
         try {
@@ -143,9 +143,9 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void modifyValueAssertChangeInModelOnDouble() throws Throwable {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "Latitude: <input id='input' data-bind=\"value: latitude\"></input>\n"
         );
         try {
@@ -167,7 +167,7 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void rawObject() throws Exception {
         if (js == null) {
             final BrwsrCtx ctx = newContext();
@@ -200,7 +200,7 @@
 
             p1.setFirstName("Ondra");
             assertEquals(p1.getFirstName(), "Ondra", "1st name updated in original object");
-            
+
             js.getPeople().add(p1);
         }
 
@@ -239,9 +239,9 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void modifyValueAssertChangeInModelOnBoolean() throws Throwable {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "Latitude: <input id='input' data-bind=\"value: enabled\"></input>\n"
         );
         try {
@@ -263,9 +263,9 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void modifyValueAssertChangeInModel() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "<h1 data-bind=\"text: helloMessage\">Loading Bck2Brwsr's Hello World...</h1>\n" +
             "Your name: <input id='input' data-bind=\"value: name\"></input>\n" +
             "<button id=\"hello\">Say Hello!</button>\n"
@@ -287,7 +287,7 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     private static String getSetSelected(int index, Object value) throws Exception {
         String s = "var index = arguments[0];\n"
         + "var value = arguments[1];\n"
@@ -305,7 +305,7 @@
         );
         return ret == null ? null : ret.toString();
     }
-    
+
     @Model(className = "ArchetypeData", properties = {
         @Property(name = "artifactId", type = String.class),
         @Property(name = "groupId", type = String.class),
@@ -316,35 +316,35 @@
     })
     static class ArchModel {
     }
-    
+
     @KOTest public void selectWorksOnModels() throws Exception {
         if (js == null) {
-            Utils.exposeHTML(KnockoutTest.class, 
+            Utils.exposeHTML(KnockoutTest.class,
                 "<select id='input' data-bind=\"options: archetypes,\n" +
 "                       optionsText: 'name',\n" +
 "                       value: archetype\">\n" +
 "                  </select>\n" +
 ""
             );
-            
+
             js = Models.bind(new KnockoutModel(), newContext());
             js.getArchetypes().add(new ArchetypeData("ko4j", "org.netbeans.html", "0.8.3", "ko4j", "ko4j", null));
             js.getArchetypes().add(new ArchetypeData("crud", "org.netbeans.html", "0.8.3", "crud", "crud", null));
             js.getArchetypes().add(new ArchetypeData("3rd", "org.netbeans.html", "0.8.3", "3rd", "3rd", null));
             js.setArchetype(js.getArchetypes().get(1));
             js.applyBindings();
-            
+
             String v = getSetSelected(0, null);
             assertEquals("crud", v, "Second index (e.g. crud) is selected: " + v);
-            
+
             String sel = getSetSelected(2, Models.toRaw(js.getArchetypes().get(2)));
             assertEquals("3rd", sel, "3rd is selected now: " + sel);
         }
-        
+
         if (js.getArchetype() != js.getArchetypes().get(2)) {
             throw new InterruptedException();
         }
-        
+
         Utils.exposeHTML(KnockoutTest.class, "");
     }
 
@@ -374,22 +374,22 @@
         assertEquals("org.netbeans.html", v, "groupId has been changed");
         Utils.exposeHTML(KnockoutTest.class, "");
     }
-    
+
     @KOTest public void modifyValueAssertAsyncChangeInModel() throws Exception {
         if (js == null) {
-            Utils.exposeHTML(KnockoutTest.class, 
+            Utils.exposeHTML(KnockoutTest.class,
                 "<h1 data-bind=\"text: helloMessage\">Loading Bck2Brwsr's Hello World...</h1>\n" +
                 "Your name: <input id='input' data-bind=\"value: name\"></input>\n" +
                 "<button id=\"hello\">Say Hello!</button>\n"
             );
-            
+
             js = Models.bind(new KnockoutModel(), newContext());
             js.setName("Kukuc");
             js.applyBindings();
-            
+
             String v = getSetInput("input", null);
             assertEquals("Kukuc", v, "Value is really kukuc: " + v);
-            
+
             Timer t = new Timer("Set to Jardo");
             t.schedule(new TimerTask() {
                 @Override
@@ -398,15 +398,100 @@
                 }
             }, 1);
         }
-        
+
         String v = getSetInput("input", null);
         if (!"Jardo".equals(v)) {
             throw new InterruptedException();
         }
-        
+
         Utils.exposeHTML(KnockoutTest.class, "");
     }
-    
+
+    @Model(className = "ConstantModel", targetId = "", builder = "assign", properties = {
+        @Property(name = "doubleValue", mutable = false, type = double.class),
+        @Property(name = "longValue", mutable = false, type = long.class),
+        @Property(name = "stringValue", mutable = false, type = String.class),
+        @Property(name = "boolValue", mutable = false, type = boolean.class),
+        @Property(name = "intArray", mutable = false, type = int.class, array = true),
+    })
+    static class ConstantCntrl {
+    }
+
+    @KOTest public void nonMutableDouble() throws Exception {
+        Utils.exposeHTML(KnockoutTest.class,
+            "Type: <input id='input' data-bind=\"value: typeof doubleValue\"></input>\n"
+        );
+
+        ConstantModel model = Models.bind(new ConstantModel(), newContext());
+        model.assignStringValue("Hello").assignDoubleValue(10.0);
+        model.applyBindings();
+
+        String v = getSetInput("input", null);
+        assertEquals(v, "number", "Right type found: " + v);
+
+        Utils.exposeHTML(KnockoutTest.class, "");
+    }
+
+    @KOTest public void nonMutableString() throws Exception {
+        Utils.exposeHTML(KnockoutTest.class,
+            "Type: <input id='input' data-bind=\"value: typeof stringValue\"></input>\n"
+        );
+
+        ConstantModel model = Models.bind(new ConstantModel(), newContext());
+        model.assignStringValue("Hello").assignDoubleValue(10.0);
+        model.applyBindings();
+
+        String v = getSetInput("input", null);
+        assertEquals(v, "string", "Right type found: " + v);
+
+        Utils.exposeHTML(KnockoutTest.class, "");
+    }
+
+    @KOTest public void nonMutableBoolean() throws Exception {
+        Utils.exposeHTML(KnockoutTest.class,
+            "Type: <input id='input' data-bind=\"value: typeof boolValue\"></input>\n"
+        );
+
+        ConstantModel model = Models.bind(new ConstantModel(), newContext());
+        model.assignStringValue("Hello").assignBoolValue(true);
+        model.applyBindings();
+
+        String v = getSetInput("input", null);
+        assertEquals(v, "boolean", "Right type found: " + v);
+
+        Utils.exposeHTML(KnockoutTest.class, "");
+    }
+
+    @KOTest public void nonMutableLong() throws Exception {
+        Utils.exposeHTML(KnockoutTest.class,
+            "Type: <input id='input' data-bind=\"value: typeof longValue\"></input>\n"
+        );
+
+        ConstantModel model = Models.bind(new ConstantModel(), newContext());
+        model.assignStringValue("Hello").assignLongValue(Long.MAX_VALUE);
+        model.applyBindings();
+
+        String v = getSetInput("input", null);
+        assertEquals(v, "number", "Right type found: " + v);
+
+        Utils.exposeHTML(KnockoutTest.class, "");
+    }
+
+    @KOTest public void nonMutableIntArray() throws Exception {
+        Utils.exposeHTML(KnockoutTest.class,
+            "Type: <input id='input' data-bind=\"value: typeof intArray\"></input>\n"
+        );
+
+        ConstantModel model = Models.bind(new ConstantModel(), newContext());
+        model.assignStringValue("Hello").assignLongValue(Long.MAX_VALUE).assignIntArray(1, 2, 3, 4);
+        model.applyBindings();
+
+        String v = getSetInput("input", null);
+        assertEquals(v, "object", "Right type found: " + v);
+
+        Utils.exposeHTML(KnockoutTest.class, "");
+    }
+
     private static String getSetInput(String id, String value) throws Exception {
         String s = "var value = arguments[0];\n"
         + "var n = window.document.getElementById(arguments[1]); \n "
@@ -429,7 +514,7 @@
         );
         return Boolean.TRUE.equals(ret);
     }
-    
+
     public static void triggerEvent(String id, String ev) throws Exception {
         Utils.executeScript(
             KnockoutTest.class,
@@ -437,9 +522,9 @@
             id, ev
         );
     }
-    
+
     @KOTest public void displayContentOfArray() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "<ul id='ul' data-bind='foreach: results'>\n"
             + "  <li data-bind='text: $data, click: $root.call'/>\n"
             + "</ul>\n"
@@ -465,10 +550,10 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void displayContentOfAsyncArray() throws Exception {
         if (js == null) {
-            Utils.exposeHTML(KnockoutTest.class, 
+            Utils.exposeHTML(KnockoutTest.class,
                 "<ul id='ul' data-bind='foreach: results'>\n"
                 + "  <li data-bind='text: $data, click: $root.call'/>\n"
                 + "</ul>\n"
@@ -479,7 +564,7 @@
 
             int cnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(cnt, 1, "One child, but was " + cnt);
-            
+
             Timer t = new Timer("add to array");
             t.schedule(new TimerTask() {
                 @Override
@@ -504,9 +589,9 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void displayContentOfComputedArray() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "<ul id='ul' data-bind='foreach: bothNames'>\n"
             + "  <li data-bind='text: $data, click: $root.assignFirstName'/>\n"
             + "</ul>\n"
@@ -521,23 +606,23 @@
             triggerChildClick("ul", 1);
 
             assertEquals("Last", m.getFirstName(), "We got callback from 2nd child " + m.getFirstName());
-            
+
             m.setLastName("Verylast");
 
             cnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(cnt, 2, "Two children now, but was " + cnt);
-            
+
             triggerChildClick("ul", 1);
 
             assertEquals("Verylast", m.getFirstName(), "We got callback from 2nd child " + m.getFirstName());
-            
+
         } finally {
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void displayContentOfComputedArrayOnASubpair() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
               "<div data-bind='with: next'>\n"
             + "<ul id='ul' data-bind='foreach: bothNames'>\n"
             + "  <li data-bind='text: $data, click: $root.assignFirstName'/>\n"
@@ -553,7 +638,7 @@
             assertEquals(cnt, 2, "Two children now, but was " + cnt);
 
             triggerChildClick("ul", 1);
-            
+
             assertEquals(PairModel.ctx, ctx, "Context remains the same");
 
             assertEquals("Last", m.getFirstName(), "We got callback from 2nd child " + m.getFirstName());
@@ -561,9 +646,9 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void displayContentOfComputedArrayOnComputedASubpair() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
               "<div data-bind='with: nextOne'>\n"
             + "<ul id='ul' data-bind='foreach: bothNames'>\n"
             + "  <li data-bind='text: $data, click: $root.assignFirstName'/>\n"
@@ -586,7 +671,7 @@
     }
 
     @KOTest public void checkBoxToBooleanBinding() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "<input type='checkbox' id='b' data-bind='checked: enabled'></input>\n"
         );
         try {
@@ -602,11 +687,11 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
-    
-    
+
+
+
     @KOTest public void displayContentOfDerivedArray() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "<ul id='ul' data-bind='foreach: cmpResults'>\n"
             + "  <li><b data-bind='text: $data'></b></li>\n"
             + "</ul>\n"
@@ -627,9 +712,9 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void displayContentOfArrayOfPeople() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "<ul id='ul' data-bind='foreach: people'>\n"
             + "  <li data-bind='text: $data.firstName, click: $root.removePerson'></li>\n"
             + "</ul>\n"
@@ -672,14 +757,14 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @ComputedProperty
     static Person firstPerson(List<Person> people) {
         return people.isEmpty() ? null : people.get(0);
     }
-    
+
     @KOTest public void accessFirstPersonWithOnFunction() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "<p id='ul' data-bind='with: firstPerson'>\n"
             + "  <span data-bind='text: firstName, click: changeSex'></span>\n"
             + "</p>\n"
@@ -690,9 +775,9 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void onPersonFunction() throws Exception {
-        Object exp = Utils.exposeHTML(KnockoutTest.class, 
+        Object exp = Utils.exposeHTML(KnockoutTest.class,
             "<ul id='ul' data-bind='foreach: people'>\n"
             + "  <li data-bind='text: $data.firstName, click: changeSex'></li>\n"
             + "</ul>\n"
@@ -703,7 +788,7 @@
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     private void trasfertToFemale() throws Exception {
         KnockoutModel m = Models.bind(new KnockoutModel(), newContext());
 
@@ -723,7 +808,7 @@
 
         assertEquals(first.getSex(), Sex.FEMALE, "Transverted to female: " + first.getSex());
     }
-    
+
     @KOTest public void stringArrayModificationVisible() throws Exception {
         Object exp = Utils.exposeHTML(KnockoutTest.class,
                 "<div>\n"
@@ -737,19 +822,19 @@
             m.getResults().add("Ahoj");
             m.getResults().add("Hello");
             m.applyBindings();
-            
+
             int cnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(cnt, 2, "Two children " + cnt);
-            
+
             Object arr = Utils.addChildren(KnockoutTest.class, "ul", "results", "Hi");
             assertTrue(arr instanceof Object[], "Got back an array: " + arr);
             final int len = ((Object[])arr).length;
-            
+
             assertEquals(len, 3, "Three elements in the array " + len);
-            
+
             int newCnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(newCnt, 3, "Three children in the DOM: " + newCnt);
-            
+
             assertEquals(m.getResults().size(), 3, "Three java strings: " + m.getResults());
         } finally {
             Utils.exposeHTML(KnockoutTest.class, "");
@@ -769,19 +854,19 @@
             m.getNumbers().add(1);
             m.getNumbers().add(31);
             m.applyBindings();
-            
+
             int cnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(cnt, 2, "Two children " + cnt);
-            
+
             Object arr = Utils.addChildren(KnockoutTest.class, "ul", "numbers", 42);
             assertTrue(arr instanceof Object[], "Got back an array: " + arr);
             final int len = ((Object[])arr).length;
-            
+
             assertEquals(len, 3, "Three elements in the array " + len);
-            
+
             int newCnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(newCnt, 3, "Three children in the DOM: " + newCnt);
-            
+
             assertEquals(m.getNumbers().size(), 3, "Three java ints: " + m.getNumbers());
             assertEquals(m.getNumbers().get(2), 42, "Meaning of world: " + m.getNumbers());
         } finally {
@@ -802,26 +887,26 @@
             m.getResults().add("Ahoj");
             m.getResults().add("Hello");
             m.applyBindings();
-            
+
             int cnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(cnt, 2, "Two children " + cnt);
-            
+
             Object arr = Utils.addChildren(KnockoutTest.class, "ul", "results", "Hi");
             assertTrue(arr instanceof Object[], "Got back an array: " + arr);
             final int len = ((Object[])arr).length;
-            
+
             assertEquals(len, 3, "Three elements in the array " + len);
-            
+
             int newCnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(newCnt, 3, "Three children in the DOM: " + newCnt);
-            
+
             assertEquals(m.getResultLengths().size(), 3, "Three java ints: " + m.getResultLengths());
             assertEquals(m.getResultLengths().get(2), 2, "Size is two: " + m.getResultLengths());
         } finally {
             Utils.exposeHTML(KnockoutTest.class, "");
         }
     }
-    
+
     @KOTest public void archetypeArrayModificationVisible() throws Exception {
         Object exp = Utils.exposeHTML(KnockoutTest.class,
                 "<div>\n"
@@ -833,19 +918,19 @@
         try {
             KnockoutModel m = Models.bind(new KnockoutModel(), newContext());
             m.applyBindings();
-            
+
             int cnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(cnt, 0, "No children " + cnt);
-            
+
             Object arr = Utils.addChildren(KnockoutTest.class, "ul", "archetypes", new ArchetypeData("aid", "gid", "v", "n", "d", "u"));
             assertTrue(arr instanceof Object[], "Got back an array: " + arr);
             final int len = ((Object[])arr).length;
-            
+
             assertEquals(len, 1, "One element in the array " + len);
-            
+
             int newCnt = Utils.countChildren(KnockoutTest.class, "ul");
             assertEquals(newCnt, 1, "One child in the DOM: " + newCnt);
-            
+
             assertEquals(m.getArchetypes().size(), 1, "One archetype: " + m.getArchetypes());
             assertNotNull(m.getArchetypes().get(0), "Not null: " + m.getArchetypes());
             assertEquals(m.getArchetypes().get(0).getArtifactId(), "aid", "'aid' == " + m.getArchetypes());
@@ -865,18 +950,18 @@
         model.setCallbackCount(model.getCallbackCount() + 1);
         model.getPeople().remove(data);
     }
-    
-    
+
+
     @ComputedProperty
     static String helloMessage(String name) {
         return "Hello " + name + "!";
     }
-    
+
     @ComputedProperty
     static List<String> cmpResults(List<String> results) {
         return results;
     }
-    
+
     private static void triggerClick(String id) throws Exception {
         String s = "var id = arguments[0];"
             + "var e = window.document.getElementById(id);\n "
@@ -893,17 +978,17 @@
             s, id);
     }
     private static void triggerChildClick(String id, int pos) throws Exception {
-        String s = 
+        String s =
             "var id = arguments[0]; var pos = arguments[1];\n" +
             "var e = window.document.getElementById(id);\n " +
             "var ev = window.document.createEvent('MouseEvents');\n " +
             "ev.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);\n " +
             "var list = e.childNodes;\n" +
-            "var cnt = -1;\n" + 
-            "for (var i = 0; i < list.length; i++) {\n" + 
-            "  if (list[i].nodeType == 1) cnt++;\n" + 
-            "  if (cnt == pos) return list[i].dispatchEvent(ev);\n" + 
-            "}\n" + 
+            "var cnt = -1;\n" +
+            "for (var i = 0; i < list.length; i++) {\n" +
+            "  if (list[i].nodeType == 1) cnt++;\n" +
+            "  if (cnt == pos) return list[i].dispatchEvent(ev);\n" +
+            "}\n" +
             "return null;\n";
         Utils.executeScript(
             KnockoutTest.class,
@@ -911,15 +996,15 @@
     }
 
     private static String childText(String id, int pos) throws Exception {
-        String s = 
+        String s =
             "var id = arguments[0]; var pos = arguments[1];" +
             "var e = window.document.getElementById(id);\n" +
             "var list = e.childNodes;\n" +
-            "var cnt = -1;\n" + 
-            "for (var i = 0; i < list.length; i++) {\n" + 
-            "  if (list[i].nodeType == 1) cnt++;\n" + 
-            "  if (cnt == pos) return list[i].innerHTML;\n" + 
-            "}\n" + 
+            "var cnt = -1;\n" +
+            "for (var i = 0; i < list.length; i++) {\n" +
+            "  if (list[i].nodeType == 1) cnt++;\n" +
+            "  if (cnt == pos) return list[i].innerHTML;\n" +
+            "}\n" +
             "return null;\n";
         return (String)Utils.executeScript(
             KnockoutTest.class,
diff -r 4c40ceb185e5 -r c61d247f087a json/src/main/java/org/netbeans/html/json/impl/Bindings.java
--- a/json/src/main/java/org/netbeans/html/json/impl/Bindings.java	Mon Feb 22 06:09:33 2016 +0100
+++ b/json/src/main/java/org/netbeans/html/json/impl/Bindings.java	Mon Feb 22 19:58:32 2016 +0100
@@ -64,8 +64,8 @@
         this.bp = bp;
     }
     
-    public <M> PropertyBinding registerProperty(String propName, int index, M model, Proto.Type<M> access, boolean readOnly) {
-        return PropertyBindingAccessor.create(access, this, propName, index, model, readOnly);
+    public <M> PropertyBinding registerProperty(String propName, int index, M model, Proto.Type<M> access, byte propertyType) {
+        return PropertyBindingAccessor.create(access, this, propName, index, model, propertyType);
     }
 
     public static Bindings<?> apply(BrwsrCtx c) {
diff -r 4c40ceb185e5 -r c61d247f087a json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java
--- a/json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java	Mon Feb 22 06:09:33 2016 +0100
+++ b/json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java	Mon Feb 22 19:58:32 2016 +0100
@@ -359,7 +359,7 @@
                 {
                     for (int i = 0; i < propsGetSet.size(); i++) {
                         w.append("      registerProperty(\"").append(propsGetSet.get(i).name).append("\", ");
-                        w.append((i) + ", " + propsGetSet.get(i).readOnly + ");\n");
+                        w.append((i) + ", " + propsGetSet.get(i).readOnly + ", " + propsGetSet.get(i).constant + ");\n");
                     }
                 }
                 {
@@ -728,7 +728,8 @@
                 gs[0],
                 gs[1],
                 tn,
-                gs[3] == null && !p.array()
+                gs[3] == null && !p.array(),
+                !p.mutable()
             ));
         }
         return ok;
@@ -864,7 +865,8 @@
                     gs[0],
                     null,
                     tn,
-                    true
+                    true,
+                    false
                 ));
             } else {
                 w.write("  public void " + gs[4] + "(" + write.getParameters().get(1).asType());
@@ -877,6 +879,7 @@
                     gs[0],
                     gs[4],
                     tn,
+                    false,
                     false
                 ));
             }
@@ -2069,12 +2072,15 @@
         final String setter;
         final String type;
         final boolean readOnly;
-        GetSet(String name, String getter, String setter, String type, boolean readOnly) {
+        final boolean constant;
+        
+        GetSet(String name, String getter, String setter, String type, boolean readOnly, boolean constant) {
             this.name = name;
             this.getter = getter;
             this.setter = setter;
             this.type = type;
             this.readOnly = readOnly;
+            this.constant = constant;
         }
     }
 
diff -r 4c40ceb185e5 -r c61d247f087a json/src/main/java/org/netbeans/html/json/impl/PropertyBindingAccessor.java
--- a/json/src/main/java/org/netbeans/html/json/impl/PropertyBindingAccessor.java	Mon Feb 22 06:09:33 2016 +0100
+++ b/json/src/main/java/org/netbeans/html/json/impl/PropertyBindingAccessor.java	Mon Feb 22 19:58:32 2016 +0100
@@ -64,8 +64,7 @@
     }
 
     protected abstract <M> PropertyBinding newBinding(
-        Proto.Type<M> access, Bindings<?> bindings, String name, int index, M model, boolean readOnly
-    );
+        Proto.Type<M> access, Bindings<?> bindings, String name, int index, M model, byte propertyType);
     protected abstract JSONCall newCall(
         BrwsrCtx ctx, RcvrJSON callback,
         String headers, String urlBefore, String urlAfter,
@@ -87,9 +86,9 @@
     }
 
     static <M> PropertyBinding create(
-        Proto.Type<M> access, Bindings<?> bindings, String name, int index, M model , boolean readOnly
+        Proto.Type<M> access, Bindings<?> bindings, String name, int index, M model , byte propertyType
     ) {
-        return DEFAULT.newBinding(access, bindings, name, index, model, readOnly);
+        return DEFAULT.newBinding(access, bindings, name, index, model, propertyType);
     }
     public static JSONCall createCall(
         BrwsrCtx ctx, RcvrJSON callback,
diff -r 4c40ceb185e5 -r c61d247f087a json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java
--- a/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java	Mon Feb 22 06:09:33 2016 +0100
+++ b/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java	Mon Feb 22 19:58:32 2016 +0100
@@ -45,6 +45,7 @@
 import java.lang.ref.Reference;
 import java.lang.ref.WeakReference;
 import net.java.html.BrwsrCtx;
+import net.java.html.json.ComputedProperty;
 import org.netbeans.html.json.impl.Bindings;
 import org.netbeans.html.json.impl.JSON;
 import org.netbeans.html.json.impl.PropertyBindingAccessor;
@@ -93,10 +94,8 @@
 
             @Override
             protected <M> PropertyBinding newBinding(
-                Proto.Type<M> access, Bindings<?> bindings, String name,
-                int index, M model, boolean readOnly
-            ) {
-                return new Impl(model, bindings, name, index, access, readOnly);
+                Proto.Type<M> access, Bindings<?> bindings, String name, int index, M model, byte propertyType) {
+                return new Impl(model, bindings, name, index, access, propertyType);
             }
         };
     }
@@ -121,12 +120,22 @@
      */
     public abstract Object getValue();
 
-    /** Is this property read only? Or can one call {@link #setValue(java.lang.Object)}?
+    /** Is this property read only?. Or can one call {@link #setValue(java.lang.Object)}?
+     * The property can still change, but only as a result of other
+     * properties being changed, just like {@link ComputedProperty} can.
      *
      * @return true, if this property is read only
      */
     public abstract boolean isReadOnly();
 
+    /** Is this property constant?. If a property is constant, than its
+     * value cannot changed after it is read.
+     *
+     * @return true, if this property is constant
+     * @since 1.3
+     */
+    public abstract boolean isConstant();
+
     /** Returns identical version of the binding, but one that holds on the
      * original model object via weak reference.
      *
@@ -137,17 +146,17 @@
 
     private static abstract class AImpl<M> extends PropertyBinding {
         public final String name;
-        public final boolean readOnly;
+        public final byte propertyType;
         final Proto.Type<M> access;
         final Bindings<?> bindings;
         final int index;
 
-        public AImpl(Bindings<?> bindings, String name, int index, Proto.Type<M> access, boolean readOnly) {
+        public AImpl(Bindings<?> bindings, String name, int index, Proto.Type<M> access, byte propertyType) {
             this.bindings = bindings;
             this.name = name;
             this.index = index;
             this.access = access;
-            this.readOnly = readOnly;
+            this.propertyType = propertyType;
         }
 
         protected abstract M model();
@@ -174,7 +183,12 @@
 
         @Override
         public boolean isReadOnly() {
-            return readOnly;
+            return (propertyType & 1) != 0;
+        }
+
+        @Override
+        public boolean isConstant() {
+            return (propertyType & 2) != 0;
         }
 
         @Override
@@ -186,8 +200,8 @@
     private static final class Impl<M> extends AImpl<M> {
         private final M model;
 
-        public Impl(M model, Bindings<?> bindings, String name, int index, Proto.Type<M> access, boolean readOnly) {
-            super(bindings, name, index, access, readOnly);
+        public Impl(M model, Bindings<?> bindings, String name, int index, Proto.Type<M> access, byte propertyType) {
+            super(bindings, name, index, access, propertyType);
             this.model = model;
         }
 
@@ -198,14 +212,14 @@
 
         @Override
         public PropertyBinding weak() {
-            return new Weak(model, bindings, name, index, access, readOnly);
+            return new Weak(model, bindings, name, index, access, propertyType);
         }
     }
 
     private static final class Weak<M> extends AImpl<M> {
         private final Reference<M> ref;
-        public Weak(M model, Bindings<?> bindings, String name, int index, Proto.Type<M> access, boolean readOnly) {
-            super(bindings, name, index, access, readOnly);
+        public Weak(M model, Bindings<?> bindings, String name, int index, Proto.Type<M> access, byte propertyType) {
+            super(bindings, name, index, access, propertyType);
             this.ref = new WeakReference<M>(model);
         }
 
diff -r 4c40ceb185e5 -r c61d247f087a json/src/main/java/org/netbeans/html/json/spi/Proto.java
--- a/json/src/main/java/org/netbeans/html/json/spi/Proto.java	Mon Feb 22 06:09:33 2016 +0100
+++ b/json/src/main/java/org/netbeans/html/json/spi/Proto.java	Mon Feb 22 19:58:32 2016 +0100
@@ -512,7 +512,7 @@
             PropertyBinding[] pb = new PropertyBinding[type.propertyNames.length];
             for (int i = 0; i < pb.length; i++) {
                 pb[i] = b.registerProperty(
-                    type.propertyNames[i], i, obj, type, type.propertyReadOnly[i]
+                    type.propertyNames[i], i, obj, type, type.propertyType[i]
                 );
             }
             FunctionBinding[] fb = new FunctionBinding[type.functions.length];
@@ -551,7 +551,7 @@
     public static abstract class Type<Model> {
         private final Class<Model> clazz;
         private final String[] propertyNames;
-        private final boolean[] propertyReadOnly;
+        private final byte[] propertyType;
         private final String[] functions;
 
         /** Constructor for subclasses generated by the annotation processor
@@ -573,7 +573,7 @@
             }
             this.clazz = clazz;
             this.propertyNames = new String[properties];
-            this.propertyReadOnly = new boolean[properties];
+            this.propertyType = new byte[properties];
             this.functions = new String[functions];
             JSON.register(clazz, this);
         }
@@ -588,7 +588,29 @@
         protected final void registerProperty(String name, int index, boolean readOnly) {
             assert propertyNames[index] == null;
             propertyNames[index] = name;
-            propertyReadOnly[index] = readOnly;
+            propertyType[index] = (byte) (readOnly ? 1 : 0);
+        }
+
+        /** Registers property for the type. It is expected each index
+         * is initialized only once. The difference between <code>readOnly</code>
+         * and <code>constant</code> is: The <code>constant</code> value is
+         * assigned only at the beginning and never changed then - like the
+         * {@link Property#mutable() non-mutable} property. On the other
+         * hand, a <code>readOnly</code> property can change its value,
+         * but not via a setter - just like {@link ComputedProperty}.
+         *
+         * @param name name of the property
+         * @param index index of the property
+         * @param readOnly is the property read only?
+         * @param constant is the property assigned once and never changed again?
+         * @since 1.3
+         */
+        protected final void registerProperty(
+            String name, int index, boolean readOnly, boolean constant
+        ) {
+            assert propertyNames[index] == null;
+            propertyNames[index] = name;
+            propertyType[index] = (byte) ((readOnly ? 1 : 0) | (constant ? 2 : 0));
         }
 
         /** Registers function of given name at given index.
diff -r 4c40ceb185e5 -r c61d247f087a ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java
--- a/ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java	Mon Feb 22 06:09:33 2016 +0100
+++ b/ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java	Mon Feb 22 19:58:32 2016 +0100
@@ -72,10 +72,12 @@
     final Object createKO(Object model, Object copyFrom, PropertyBinding[] propArr, FunctionBinding[] funcArr, Knockout[] ko) {
         String[] propNames = new String[propArr.length];
         Boolean[] propReadOnly = new Boolean[propArr.length];
+        Boolean[] propConstant = new Boolean[propArr.length];
         Object[] propValues = new Object[propArr.length];
         for (int i = 0; i < propNames.length; i++) {
             propNames[i] = propArr[i].getPropertyName();
             propReadOnly[i] = propArr[i].isReadOnly();
+            propConstant[i] = propArr[i].isConstant();
             Object value = propArr[i].getValue();
             if (value instanceof Enum) {
                 value = value.toString();
@@ -93,7 +95,7 @@
         }
         newKO.wrapModel(
             ret, copyFrom,
-            propNames, propReadOnly, propValues,
+            propNames, propReadOnly, propConstant, propValues,
             funcNames
         );
         return ret;
diff -r 4c40ceb185e5 -r c61d247f087a ko4j/src/main/java/org/netbeans/html/ko4j/Knockout.java
--- a/ko4j/src/main/java/org/netbeans/html/ko4j/Knockout.java	Mon Feb 22 06:09:33 2016 +0100
+++ b/ko4j/src/main/java/org/netbeans/html/ko4j/Knockout.java	Mon Feb 22 19:58:32 2016 +0100
@@ -168,7 +168,7 @@
         javacall = true,
         keepAlive = false,
         wait4js = false,
-        args = { "ret", "copyFrom", "propNames", "propReadOnly", "propValues", "funcNames" },
+        args = { "ret", "copyFrom", "propNames", "propReadOnly", "propConstant", "propValues", "funcNames" },
         body = 
           "Object.defineProperty(ret, 'ko4j', { value : this });\n"
         + "function koComputed(index, name, readOnly, value) {\n"
@@ -225,7 +225,11 @@
         + "  ret[name] = cmpt;\n"
         + "}\n"
         + "for (var i = 0; i < propNames.length; i++) {\n"
-        + "  koComputed(i, propNames[i], propReadOnly[i], propValues[i]);\n"
+        + "  if (propConstant[i]) {\n"
+        + "    ret[propNames[i]] = propValues[i];\n"
+        + "  } else {\n"
+        + "    koComputed(i, propNames[i], propReadOnly[i], propValues[i]);\n"
+        + "  }\n"
         + "}\n"
         + "function koExpose(index, name) {\n"
         + "  ret[name] = function(data, ev) {\n"
@@ -240,7 +244,8 @@
         )
     native void wrapModel(
         Object ret, Object copyFrom,
-        String[] propNames, Boolean[] propReadOnly, Object propValues,
+        String[] propNames, Boolean[] propReadOnly, Boolean[] propConstant,
+        Object propValues,
         String[] funcNames
     );