Bootstrap method question

[Howard Lovatt]

This is probably my mistake, but I thought it worth checking anyway!

I am playing around with multiple dispatch in the MLVM, in particular.

public class Cost {
  /* Written by PEC! */ static {
    final MethodHandle bootstrap = MethodHandles.lookup().findStatic(
CostCalculatorDispatcher.class,

 "cost",

 Dispatchers.bootstrapType );
    Linkage.registerBootstrapMethod( Cost.class, bootstrap );
  }

  public static void main( final String[] notUsed ) {
    final List<Item> shoppingCart = new ArrayList<Item>();
    shoppingCart.add( new Book( 20, 0.5 ) );
    shoppingCart.add( new CD( 25 ) );
    System.out.println( "cost = " + cost( shoppingCart ) );
  }

  public static double cost( final List<Item> shoppingCart ) {
    final CostCalculator price = new Price();
    final CostCalculator postage = new Postage();
    double cost = 0;
    for ( final Item item : shoppingCart ) {
      try { /* Written by PEC! */
        cost += InvokeDynamic.<double>cost( price, item );
      } catch ( Throwable e ) {
        throw new MultipleDispatchException( e );
      }
      try { /* Written by PEC! */
        cost += InvokeDynamic.<double>cost( postage, item );
      } catch ( Throwable e ) {
        throw new MultipleDispatchException( e );
      }
    }
    return cost;
  }
}

The bootstrap method gets called, but its type argument is:

(invokedynamicmultipledispatch.CostCalculator,invokedynamicmultipledispatch.Item)double

IE the static types, I was expecting the dynamic types:

(invokedynamicmultipledispatch.Price,invokedynamicmultipledispatch.Book)double
etc.

What am I doing wrong?


 -- Howard.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.openjdk.java.net/pipermail/mlvm-dev/attachments/20100612/6126bcb1/attachment.html