Fixed unsafe access to object's inherited properties

index.d.ts

@@ -2147,6 +2147,14 @@ export namespace util {
      */
     function safeProp(prop: string): string;
 
+    /**
+     * Returns the value of a property found directly in a given object.
+     * @param object Source object
+     * @param prop Property name
+     * @returns Value or `undefined` if not set
+     */
+    function getProp(object: object, prop: string): any;
+
     /**
      * Converts the first character of a string to upper case.
      * @param str String to convert

src/namespace.js

@@ -191,7 +191,7 @@ Namespace.prototype.addJSON = function addJSON(nestedJson) {
  * @returns {ReflectionObject|null} The reflection object or `null` if it doesn't exist
  */
 Namespace.prototype.get = function get(name) {
-    return this.nested && this.nested[name]
+    return util.getProp(this.nested, name)
         || null;
 };
 

src/service.js

@@ -98,7 +98,7 @@ function clearCache(service) {
  * @override
  */
 Service.prototype.get = function get(name) {
-    return this.methods[name]
+    return util.getProp(this.methods, name)
         || Namespace.prototype.get.call(this, name);
 };
 

src/type.js

@@ -312,9 +312,9 @@ Type.prototype.resolveAll = function resolveAll() {
  * @override
  */
 Type.prototype.get = function get(name) {
-    return this.fields[name]
-        || this.oneofs && this.oneofs[name]
-        || this.nested && this.nested[name]
+    return util.getProp(this.fields, name)
+        || util.getProp(this.oneofs, name)
+        || util.getProp(this.nested, name)
         || null;
 };
 

src/util.js

@@ -78,6 +78,16 @@ util.safeProp = function safeProp(prop) {
     return "." + prop;
 };
 
+/**
+ * Returns the value of a property found directly in a given object.
+ * @param {Object} object Source object
+ * @param {string} prop Property name
+ * @returns {*} Value or `undefined` if not set
+ */
+util.getProp = function get(object, prop) {
+    return object && Object.prototype.hasOwnProperty.call(object, prop) ? object[prop] : undefined;
+};
+
 /**
  * Converts the first character of a string to upper case.
  * @param {string} str String to convert