qx.data.marshal.Json | ignore non-pojo objects when marshalling

source/class/qx/Bootstrap.js

@@ -867,8 +867,8 @@ qx.Bootstrap.define("qx.Bootstrap", {
     },
 
     /**
-     * Whether the value is an object. Note that built-in types like Window are
-     * not reported to be objects.
+     * Whether the value is an object i.e. Object.prototype is its prototype or Object.prototype in its prototype chain.
+     * Note that built-in types like Window are not reported to be objects.
      *
      * @param value {var} Value to check.
      * @return {Boolean} Whether the value is an object.
@@ -881,6 +881,20 @@ qx.Bootstrap.define("qx.Bootstrap", {
       );
     },
 
+    /**
+     * Whether the value is strictly a POJO. It's prototype must not inherit from Object.prototype but be strictly Object.prototype.
+
+     * @param {*} value
+     * @returns {boolean} Whether the value is strictly a POJO. 
+     */
+    isPojo(value) {
+      return (
+        value !== undefined &&
+        value !== null &&
+        Object.getPrototypeOf(value) === Object.prototype
+      );
+    },
+
     /**
      * Whether the value is a function.
      *

source/class/qx/data/marshal/Json.js

@@ -170,9 +170,9 @@ qx.Class.define("qx.data.marshal.Json", {
      * @param depth {Number} The depth of the data relative to the data's root.
      */
     __toClass(data, includeBubbleEvents, parentProperty, depth) {
-      // break on all primitive json types and qooxdoo objects
+      // break on all primitive json types and non-POJO objects
       if (
-        !qx.lang.Type.isObject(data) ||
+        !qx.lang.Type.isPojo(data) ||
         !!data.$$isString || // check for localized strings
         data instanceof qx.core.Object
       ) {
@@ -405,12 +405,12 @@ qx.Class.define("qx.data.marshal.Json", {
      * @return {qx.core.Object} The created model object.
      */
     __toModel(data, includeBubbleEvents, parentProperty, depth) {
-      var isObject = qx.lang.Type.isObject(data);
+      var isPojo = qx.lang.Type.isPojo(data);
       var isArray =
         data instanceof Array || qx.Bootstrap.getClass(data) == "Array";
 
       if (
-        (!isObject && !isArray) ||
+        (!isPojo && !isArray) ||
         !!data.$$isString || // check for localized strings
         data instanceof qx.core.Object
       ) {
@@ -451,7 +451,7 @@ qx.Class.define("qx.data.marshal.Json", {
           );
         }
         return array;
-      } else if (isObject) {
+      } else if (isPojo) {
         // create an instance for the object
         var hash = this.__jsonToBestHash(data, includeBubbleEvents);
         var model = this.__createInstance(hash, data, parentProperty, depth);

source/class/qx/lang/Type.js

@@ -52,15 +52,23 @@ qx.Bootstrap.define("qx.lang.Type", {
     isArray: qx.Bootstrap.isArray,
 
     /**
-     * Whether the value is an object. Note that built-in types like Window are
-     * not reported to be objects.
+     * Whether the value is an object i.e. Object.prototype is its prototype or Object.prototype is in its prototype chain.
+     * Note that built-in types like Window are not reported to be objects.
      *
      * @signature function(value)
-     * @param value {var} Value to check.
+     * @param {*} value value to check.
      * @return {Boolean} Whether the value is an object.
      */
     isObject: qx.Bootstrap.isObject,
 
+    /**
+     * Whether the value is strictly a POJO. It's prototype must not inherit from Object.prototype but be strictly Object.prototype.
+     * @signature function(value)
+     * @param {*} value
+     * @returns {Boolean} Whether the value is strictly a POJO.
+     */
+    isPojo: qx.Bootstrap.isPojo,
+
     /**
      * Whether the value is a function.
      *