Examples with MethodHandle java.lang.invoke.MethodHandle used on opensource projects

Example 56 with MethodHandle

use of java.lang.invoke.MethodHandle in project es6draft by anba.

the class Properties method createInternalObjectLayout.

private static CompactLayout createInternalObjectLayout(Class<?> holder) {
    try {
        Lookup lookup = MethodHandles.publicLookup();
        CompatibilityExtension extension = holder.getAnnotation(CompatibilityExtension.class);
        CompatibilityOption option = extension != null ? extension.value() : null;
        Object prototypeValue = CompactLayout.EMPTY;
        ArrayList<PropertyLayout> properties = new ArrayList<>();
        boolean hasProto = false;
        for (Field field : holder.getDeclaredFields()) {
            if (!Modifier.isStatic(field.getModifiers()))
                continue;
            Value value = field.getAnnotation(Value.class);
            Prototype prototype = field.getAnnotation(Prototype.class);
            assert value == null || prototype == null;
            if (value != null) {
                properties.add(new ValueLayout(value, getRawValue(field)));
            }
            if (prototype != null) {
                assert !hasProto && (hasProto = true);
                prototypeValue = getRawValue(field);
            }
        }
        for (Method method : holder.getDeclaredMethods()) {
            if (!Modifier.isStatic(method.getModifiers()))
                continue;
            Function function = method.getAnnotation(Function.class);
            Accessor accessor = method.getAnnotation(Accessor.class);
            AliasFunction[] aliases = method.getAnnotationsByType(AliasFunction.class);
            TailCall tailCall = method.getAnnotation(TailCall.class);
            Value value = method.getAnnotation(Value.class);
            assert function == null || (accessor == null && value == null);
            assert accessor == null || (function == null && value == null);
            assert value == null || (function == null && accessor == null);
            assert aliases.length == 0 || function != null;
            assert tailCall == null || function != null;
            if (value != null) {
                MethodHandle mh = getComputedValueMethodHandle(lookup, method);
                properties.add(new ValueLayout(value, mh));
            } else if (accessor != null) {
                MethodHandle mh = getStaticMethodHandle(lookup, method);
                properties.add(new AccessorLayout(accessor, mh));
            } else if (function != null) {
                MethodHandle mh = getStaticMethodHandle(lookup, method);
                if (tailCall == null) {
                    properties.add(new FunctionLayout(function, mh));
                } else {
                    properties.add(new FunctionLayout(function, tailCall, mh));
                }
                for (AliasFunction a : aliases) {
                    properties.add(new AliasFunctionLayout(a, function));
                }
            }
        }
        return new CompactLayout(prototypeValue, properties, option);
    } catch (IllegalAccessException e) {
        throw new IllegalArgumentException(e);
    }
}

Example 57 with MethodHandle

use of java.lang.invoke.MethodHandle in project es6draft by anba.

the class Properties method createExternalValues.

private static <OWNER> void createExternalValues(ExecutionContext cx, ScriptObject target, OWNER owner, ObjectLayout layout, Converter converter) {
    for (Entry<Value, Object> entry : layout.values.entrySet()) {
        Value val = entry.getKey();
        assert entry.getValue() instanceof MethodHandle;
        Object value = resolveValue(cx, converter, (MethodHandle) entry.getValue(), owner);
        defineProperty(cx, target, val.name(), val.symbol(), val.attributes(), value);
    }
}

Example 58 with MethodHandle

use of java.lang.invoke.MethodHandle in project es6draft by anba.

the class Properties method createExternalFunctions.

private static void createExternalFunctions(ExecutionContext cx, OrdinaryObject target, ObjectLayout layout, Converter converter) {
    for (Entry<Function, MethodHandle> entry : layout.functions.entrySet()) {
        MethodHandle handle = getStaticMethodHandle(cx, converter, entry.getValue());
        createExternalFunction(cx, target, entry.getKey(), handle);
    }
}

Example 59 with MethodHandle

use of java.lang.invoke.MethodHandle in project es6draft by anba.

the class Properties method getInstanceMethodHandle.

private static <OWNER> MethodHandle getInstanceMethodHandle(ExecutionContext cx, Converter converter, MethodHandle unreflect, OWNER owner) {
    // var-args collector flag is not preserved when applying method handle combinators
    boolean varargs = unreflect.isVarargsCollector();
    MethodHandle handle = unreflect.bindTo(owner);
    boolean callerContext = isCallerSensitive(handle);
    final int fixedArguments = callerContext ? 1 : 0;
    handle = bindContext(handle, cx);
    handle = convertArguments(handle, fixedArguments, varargs, converter);
    handle = convertReturn(handle, converter);
    handle = catchExceptions(handle, converter);
    handle = toCanonical(handle, fixedArguments, varargs, null);
    if (!callerContext) {
        handle = MethodHandles.dropArguments(handle, 0, ExecutionContext.class, Object.class);
    } else {
        handle = MethodHandles.dropArguments(handle, 1, Object.class);
    }
    assert handle.type().parameterCount() == 3;
    assert handle.type().parameterType(0) == ExecutionContext.class;
    assert handle.type().parameterType(1) == Object.class;
    assert handle.type().parameterType(2) == Object[].class;
    assert handle.type().returnType() == Object.class;
    return handle;
}

Example 60 with MethodHandle

use of java.lang.invoke.MethodHandle in project es6draft by anba.

the class Properties method getStaticMethodHandle.

private static MethodHandle getStaticMethodHandle(ExecutionContext cx, Converter converter, MethodHandle unreflect, MethodKind methodKind) {
    // var-args collector flag is not preserved when applying method handle combinators
    boolean varargs = unreflect.isVarargsCollector();
    MethodHandle handle = unreflect;
    boolean callerContext = isCallerSensitive(handle);
    final int fixedArguments = callerContext ? 2 : 1;
    final int constructorArgument = callerContext ? 1 : 0;
    handle = bindContext(handle, cx);
    if (methodKind == MethodKind.Default) {
        handle = convertThis(handle, callerContext, converter);
    } else if (methodKind == MethodKind.Call) {
        handle = MethodHandles.insertArguments(handle, constructorArgument, (Constructor) null);
        handle = convertThis(handle, callerContext, converter);
    } else {
        assert methodKind == MethodKind.Construct;
        handle = MethodHandles.insertArguments(handle, constructorArgument + 1, (Object) null);
    }
    handle = convertArguments(handle, fixedArguments, varargs, converter);
    if (methodKind != MethodKind.Construct) {
        handle = convertReturn(handle, converter);
    } else {
        handle = convertConstructReturn(handle, converter);
    }
    handle = catchExceptions(handle, converter);
    handle = toCanonical(handle, fixedArguments, varargs, null);
    if (!callerContext) {
        handle = MethodHandles.dropArguments(handle, 0, ExecutionContext.class);
    }
    if (methodKind != MethodKind.Construct) {
        assert handle.type().parameterCount() == 3;
        assert handle.type().parameterType(0) == ExecutionContext.class;
        assert handle.type().parameterType(1) == Object.class;
        assert handle.type().parameterType(2) == Object[].class;
        assert handle.type().returnType() == Object.class;
    } else {
        assert handle.type().parameterCount() == 3;
        assert handle.type().parameterType(0) == ExecutionContext.class;
        assert handle.type().parameterType(1) == Constructor.class;
        assert handle.type().parameterType(2) == Object[].class;
        assert handle.type().returnType() == ScriptObject.class;
    }
    return handle;
}