687 }
688 cb.loadConstant(idx)
689 .ireturn();
690 }
691 cb.labelBinding(dflt)
692 .loadConstant(labelConstants.length)
693 .ireturn();
694 };
695 }
696
697 /*
698 * Construct the method handle that represents the method int typeSwitch(Object, int, BiPredicate, List)
699 */
700 private static MethodHandle generateTypeSwitch(MethodHandles.Lookup caller, Class<?> selectorType, Object[] labelConstants) {
701 boolean addExtraInfo = needsExtraInfo(selectorType, labelConstants);
702 List<EnumDesc<?>> enumDescs = addExtraInfo ? new ArrayList<>() : null;
703 List<Class<?>> extraClassLabels = addExtraInfo ? new ArrayList<>() : null;
704
705 byte[] classBytes = ClassFile.of().build(ConstantUtils.binaryNameToDesc(typeSwitchClassName(caller.lookupClass())),
706 clb -> {
707 clb.withFlags(AccessFlag.FINAL, AccessFlag.SUPER, AccessFlag.SYNTHETIC)
708 .withMethodBody("typeSwitch",
709 addExtraInfo ? MTD_TYPE_SWITCH_EXTRA : MTD_TYPE_SWITCH,
710 ClassFile.ACC_FINAL | ClassFile.ACC_PUBLIC | ClassFile.ACC_STATIC,
711 generateTypeSwitchSkeleton(selectorType, labelConstants, enumDescs, extraClassLabels));
712 });
713
714 try {
715 // this class is linked at the indy callsite; so define a hidden nestmate
716 MethodHandles.Lookup lookup;
717 lookup = caller.defineHiddenClass(classBytes, true, NESTMATE, STRONG);
718 MethodHandle typeSwitch = lookup.findStatic(lookup.lookupClass(),
719 "typeSwitch",
720 addExtraInfo ? MT_TYPE_SWITCH_EXTRA : MT_TYPE_SWITCH);
721 if (addExtraInfo) {
722 typeSwitch = MethodHandles.insertArguments(typeSwitch, 2, new ResolvedEnumLabels(caller, enumDescs.toArray(new EnumDesc<?>[0])),
723 List.copyOf(extraClassLabels));
724 }
725 return typeSwitch;
726 } catch (Throwable t) {
727 throw new IllegalArgumentException(t);
|
687 }
688 cb.loadConstant(idx)
689 .ireturn();
690 }
691 cb.labelBinding(dflt)
692 .loadConstant(labelConstants.length)
693 .ireturn();
694 };
695 }
696
697 /*
698 * Construct the method handle that represents the method int typeSwitch(Object, int, BiPredicate, List)
699 */
700 private static MethodHandle generateTypeSwitch(MethodHandles.Lookup caller, Class<?> selectorType, Object[] labelConstants) {
701 boolean addExtraInfo = needsExtraInfo(selectorType, labelConstants);
702 List<EnumDesc<?>> enumDescs = addExtraInfo ? new ArrayList<>() : null;
703 List<Class<?>> extraClassLabels = addExtraInfo ? new ArrayList<>() : null;
704
705 byte[] classBytes = ClassFile.of().build(ConstantUtils.binaryNameToDesc(typeSwitchClassName(caller.lookupClass())),
706 clb -> {
707 clb.withFlags(AccessFlag.FINAL, (PreviewFeatures.isEnabled()) ? AccessFlag.IDENTITY : AccessFlag.SUPER, AccessFlag.SYNTHETIC)
708 .withMethodBody("typeSwitch",
709 addExtraInfo ? MTD_TYPE_SWITCH_EXTRA : MTD_TYPE_SWITCH,
710 ClassFile.ACC_FINAL | ClassFile.ACC_PUBLIC | ClassFile.ACC_STATIC,
711 generateTypeSwitchSkeleton(selectorType, labelConstants, enumDescs, extraClassLabels));
712 });
713
714 try {
715 // this class is linked at the indy callsite; so define a hidden nestmate
716 MethodHandles.Lookup lookup;
717 lookup = caller.defineHiddenClass(classBytes, true, NESTMATE, STRONG);
718 MethodHandle typeSwitch = lookup.findStatic(lookup.lookupClass(),
719 "typeSwitch",
720 addExtraInfo ? MT_TYPE_SWITCH_EXTRA : MT_TYPE_SWITCH);
721 if (addExtraInfo) {
722 typeSwitch = MethodHandles.insertArguments(typeSwitch, 2, new ResolvedEnumLabels(caller, enumDescs.toArray(new EnumDesc<?>[0])),
723 List.copyOf(extraClassLabels));
724 }
725 return typeSwitch;
726 } catch (Throwable t) {
727 throw new IllegalArgumentException(t);
|