src/jdk/nashorn/internal/objects/NativeObject.java

rev 752 : 8011964: need indexed access to externally-managed ByteBuffer
Reviewed-by: lagergren, hannesw

*** 29,38 ****
--- 29,39 ----
  import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
  
  import java.lang.invoke.MethodHandle;
  import java.lang.invoke.MethodHandles;
  import java.lang.invoke.MethodType;
+ import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
*** 56,65 ****
--- 57,67 ----
  import jdk.nashorn.internal.runtime.JSType;
  import jdk.nashorn.internal.runtime.Property;
  import jdk.nashorn.internal.runtime.PropertyMap;
  import jdk.nashorn.internal.runtime.ScriptObject;
  import jdk.nashorn.internal.runtime.ScriptRuntime;
+ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  import jdk.nashorn.internal.runtime.linker.Bootstrap;
  import jdk.nashorn.internal.runtime.linker.InvokeByName;
  import jdk.nashorn.internal.runtime.linker.NashornBeansLinker;
  
  /**
*** 99,108 ****
--- 101,131 ----
      private static ECMAException notAnObject(final Object obj) {
          return typeError("not.an.object", ScriptRuntime.safeToString(obj));
      }
  
      /**
+      * Nashorn extension: setIndexedPropertiesToExternalArrayData
+      *
+      * @param self self reference
+      * @param obj object whose index properties are backed by buffer
+      * @param buf external buffer - should be a nio ByteBuffer
+      * @return the 'obj' object
+      */
+     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
+     public static Object setIndexedPropertiesToExternalArrayData(final Object self, final Object obj, final Object buf) {
+         Global.checkObject(obj);
+         final ScriptObject sobj = (ScriptObject)obj;
+         if (buf instanceof ByteBuffer) {
+             sobj.setArray(ArrayData.allocate((ByteBuffer)buf));
+         } else {
+             throw typeError("not.a.bytebuffer", "setIndexedPropertiesToExternalArrayData's buf argument");
+         }
+         return sobj;
+     }
+ 
+ 
+     /**
       * ECMA 15.2.3.2 Object.getPrototypeOf ( O )
       *
       * @param  self self reference
       * @param  obj object to get prototype from
       * @return the prototype of an object