private JCExpression getTypedParameter(
     Parameter param, int argIndex, boolean varargs, java.util.List<ProducedType> parameterTypes) {
   JCExpression argExpr;
   if (!varargs) {
     // The Callable has overridden one of the non-varargs call()
     // methods
     argExpr = gen.make().Ident(makeParamName(gen, argIndex));
   } else {
     // The Callable has overridden the varargs call() method
     // so we need to index into the varargs array
     argExpr =
         gen.make().Indexed(gen.make().Ident(makeParamName(gen, 0)), gen.make().Literal(argIndex));
   }
   // make sure we unbox it if required
   argExpr =
       gen.expressionGen()
           .applyErasureAndBoxing(
               argExpr,
               gen.typeFact().getObjectDeclaration().getType(), // it came in as Object
               true, // it's completely erased
               true, // it came in boxed
               CodegenUtil.getBoxingStrategy(param), // see if we need to box
               parameterTypes.get(argIndex), // see what type we need
               0); // no flags
   return argExpr;
 }
 private JCTree makeDefaultedCall(
     int i, boolean isVariadic, java.util.List<ProducedType> parameterTypes) {
   // collect every parameter
   int a = 0;
   ListBuffer<JCStatement> stmts = new ListBuffer<JCStatement>();
   for (Parameter param : paramLists.getParameters()) {
     // don't read default parameter values for forwarded calls
     if (forwardCallTo != null && i == a) break;
     // read the value
     JCExpression paramExpression = getTypedParameter(param, a, i > 3, parameterTypes);
     JCExpression varInitialExpression;
     if (param.isDefaulted() || param.isSequenced()) {
       if (i > 3) {
         // must check if it's defined
         JCExpression test =
             gen.make()
                 .Binary(JCTree.GT, gen.makeSelect(getParamName(0), "length"), gen.makeInteger(a));
         JCExpression elseBranch = makeDefaultValueCall(param, a);
         varInitialExpression = gen.make().Conditional(test, paramExpression, elseBranch);
       } else if (a >= i) {
         // get its default value because we don't have it
         varInitialExpression = makeDefaultValueCall(param, a);
       } else {
         // we must have it
         varInitialExpression = paramExpression;
       }
     } else {
       varInitialExpression = paramExpression;
     }
     // store it in a local var
     JCStatement var =
         gen.make()
             .VarDef(
                 gen.make().Modifiers(Flags.FINAL),
                 gen.naming.makeUnquotedName(getCallableTempVarName(param)),
                 gen.makeJavaType(
                     parameterTypes.get(a),
                     CodegenUtil.isUnBoxed(param) ? 0 : gen.JT_NO_PRIMITIVES),
                 varInitialExpression);
     stmts.append(var);
     a++;
   }
   if (forwardCallTo != null) {
     InvocationBuilder invocationBuilder =
         InvocationBuilder.forCallableInvocation(gen, forwardCallTo, paramLists, i);
     boolean prevCallableInv = gen.expressionGen().withinCallableInvocation(true);
     try {
       stmts.append(gen.make().Return(invocationBuilder.build()));
     } finally {
       gen.expressionGen().withinCallableInvocation(prevCallableInv);
     }
   } else if (isVariadic) {
     // chain to n param typed method
     List<JCExpression> args = List.nil();
     // pass along the parameters
     for (a = paramLists.getParameters().size() - 1; a >= 0; a--) {
       Parameter param = paramLists.getParameters().get(a);
       args = args.prepend(gen.makeUnquotedIdent(getCallableTempVarName(param)));
     }
     JCMethodInvocation chain =
         gen.make().Apply(null, gen.makeUnquotedIdent(Naming.getCallableTypedMethodName()), args);
     stmts.append(gen.make().Return(chain));
   } else {
     // insert the method body directly
     stmts.appendList(this.body);
   }
   List<JCStatement> body = stmts.toList();
   return makeCallMethod(body, i);
 }