src/java.base/share/classes/java/lang/invoke/MethodHandles.java

*** 3764,3773 ****
--- 3764,3774 ----
       * <p>
       * The pre-processing is performed by one or more method handles,
       * specified in the elements of the {@code filters} array.
       * The first element of the filter array corresponds to the {@code pos}
       * argument of the target, and so on in sequence.
+      * The filter functions are invoked in left to right order.
       * <p>
       * Null arguments in the array are treated as identity functions,
       * and the corresponding arguments left unchanged.
       * (If there are no non-null elements in the array, the original target is returned.)
       * Each filter is applied to the corresponding argument of the adapter.
*** 3834,3848 ****
       */
      public static
      MethodHandle filterArguments(MethodHandle target, int pos, MethodHandle... filters) {
          filterArgumentsCheckArity(target, pos, filters);
          MethodHandle adapter = target;
!         int curPos = pos-1;  // pre-incremented
!         for (MethodHandle filter : filters) {
!             curPos += 1;
              if (filter == null)  continue;  // ignore null elements of filters
!             adapter = filterArgument(adapter, curPos, filter);
          }
          return adapter;
      }
  
      /*non-public*/ static
--- 3835,3850 ----
       */
      public static
      MethodHandle filterArguments(MethodHandle target, int pos, MethodHandle... filters) {
          filterArgumentsCheckArity(target, pos, filters);
          MethodHandle adapter = target;
!         // process filters in reverse order so that the invocation of
!         // the resulting adapter will invoke the filters in left-to-right order
!         for (int i = filters.length - 1; i >= 0; --i) {
!             MethodHandle filter = filters[i];
              if (filter == null)  continue;  // ignore null elements of filters
!             adapter = filterArgument(adapter, pos + i, filter);
          }
          return adapter;
      }
  
      /*non-public*/ static