Java Code Examples for java.lang.invoke.MethodHandles#arrayElementGetter()

The following examples show how to use java.lang.invoke.MethodHandles#arrayElementGetter() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: IndyArrayAccess.java    From groovy with Apache License 2.0 6 votes vote down vote up 
private static MethodHandle buildGetter(Class<?> arrayClass) {
    MethodHandle get = MethodHandles.arrayElementGetter(arrayClass);
    MethodHandle fallback = MethodHandles.explicitCastArguments(get, get.type().changeParameterType(0, Object.class));

    fallback = MethodHandles.dropArguments(fallback, 2, int.class);
    MethodType reorderType = fallback.type().
            insertParameterTypes(0, int.class).
            dropParameterTypes(2, 3);
    fallback = MethodHandles.permuteArguments(fallback, reorderType, 1, 0, 0);

    fallback = MethodHandles.foldArguments(fallback, normalizeIndex);
    fallback = MethodHandles.explicitCastArguments(fallback, get.type());

    MethodHandle guard = MethodHandles.dropArguments(notNegative, 0, arrayClass);
    MethodHandle handle = MethodHandles.guardWithTest(guard, get, fallback);
    return handle;
}
Example 2
Source File: MethodHandleFactory.java    From TencentKona-8 with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    final MethodHandle mh = MethodHandles.arrayElementGetter(type);
    return debug(mh, "arrayElementGetter", type);
}
Example 3
Source File: MethodHandleFactory.java    From jdk8u60 with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    final MethodHandle mh = MethodHandles.arrayElementGetter(type);
    return debug(mh, "arrayElementGetter", type);
}
Example 4
Source File: MethodHandleFactory.java    From openjdk-jdk8u with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    final MethodHandle mh = MethodHandles.arrayElementGetter(type);
    return debug(mh, "arrayElementGetter", type);
}
Example 5
Source File: MethodHandleFactory.java    From openjdk-jdk8u-backup with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    final MethodHandle mh = MethodHandles.arrayElementGetter(type);
    return debug(mh, "arrayElementGetter", type);
}
Example 6
Source File: MethodHandleFactory.java    From openjdk-jdk9 with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    final MethodHandle mh = MethodHandles.arrayElementGetter(type);
    return debug(mh, "arrayElementGetter", type);
}
Example 7
Source File: MethodHandleFactory.java    From hottub with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    final MethodHandle mh = MethodHandles.arrayElementGetter(type);
    return debug(mh, "arrayElementGetter", type);
}
Example 8
Source File: MethodHandleFactory.java    From openjdk-8-source with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    return MethodHandles.arrayElementGetter(type);
}
Example 9
Source File: BeanLinker.java    From openjdk-8-source with GNU General Public License v2.0 4 votes vote down vote up 
private GuardedInvocationComponent getElementGetter(final CallSiteDescriptor callSiteDescriptor,
        final LinkerServices linkerServices, List<String> operations) throws Exception {
    final MethodType callSiteType = callSiteDescriptor.getMethodType();
    final Class<?> declaredType = callSiteType.parameterType(0);
    final GuardedInvocationComponent nextComponent = getGuardedInvocationComponent(callSiteDescriptor,
            linkerServices, operations);

    // If declared type of receiver at the call site is already an array, a list or map, bind without guard. Thing
    // is, it'd be quite stupid of a call site creator to go though invokedynamic when it knows in advance they're
    // dealing with an array, or a list or map, but hey...
    // Note that for arrays and lists, using LinkerServices.asType() will ensure that any language specific linkers
    // in use will get a chance to perform any (if there's any) implicit conversion to integer for the indices.
    final GuardedInvocationComponent gic;
    final boolean isMap;
    if(declaredType.isArray()) {
        gic = new GuardedInvocationComponent(MethodHandles.arrayElementGetter(declaredType));
        isMap = false;
    } else if(List.class.isAssignableFrom(declaredType)) {
        gic = new GuardedInvocationComponent(GET_LIST_ELEMENT);
        isMap = false;
    } else if(Map.class.isAssignableFrom(declaredType)) {
        gic = new GuardedInvocationComponent(GET_MAP_ELEMENT);
        isMap = true;
    } else if(clazz.isArray()) {
        gic = getClassGuardedInvocationComponent(MethodHandles.arrayElementGetter(clazz), callSiteType);
        isMap = false;
    } else if(List.class.isAssignableFrom(clazz)) {
        gic = new GuardedInvocationComponent(GET_LIST_ELEMENT, Guards.asType(LIST_GUARD, callSiteType), List.class,
                ValidationType.INSTANCE_OF);
        isMap = false;
    } else if(Map.class.isAssignableFrom(clazz)) {
        gic = new GuardedInvocationComponent(GET_MAP_ELEMENT, Guards.asType(MAP_GUARD, callSiteType), Map.class,
                ValidationType.INSTANCE_OF);
        isMap = true;
    } else {
        // Can't retrieve elements for objects that are neither arrays, nor list, nor maps.
        return nextComponent;
    }

    // We can have "dyn:getElem:foo", especially in composites, i.e. "dyn:getElem|getProp|getMethod:foo"
    final String fixedKey = getFixedKey(callSiteDescriptor);
    // Convert the key to a number if we're working with a list or array
    final Object typedFixedKey;
    if(!isMap && fixedKey != null) {
        typedFixedKey = convertKeyToInteger(fixedKey, linkerServices);
        if(typedFixedKey == null) {
            // key is not numeric, it can never succeed
            return nextComponent;
        }
    } else {
        typedFixedKey = fixedKey;
    }

    final GuardedInvocation gi = gic.getGuardedInvocation();
    final Binder binder = new Binder(linkerServices, callSiteType, typedFixedKey);
    final MethodHandle invocation = gi.getInvocation();

    if(nextComponent == null) {
        return gic.replaceInvocation(binder.bind(invocation));
    }

    final MethodHandle checkGuard;
    if(invocation == GET_LIST_ELEMENT) {
        checkGuard = convertArgToInt(RANGE_CHECK_LIST, linkerServices, callSiteDescriptor);
    } else if(invocation == GET_MAP_ELEMENT) {
        // TODO: A more complex solution could be devised for maps, one where we do a get() first, and fold it
        // into a GWT that tests if it returned null, and if it did, do another GWT with containsKey()
        // that returns constant null (on true), or falls back to next component (on false)
        checkGuard = CONTAINS_MAP;
    } else {
        checkGuard = convertArgToInt(RANGE_CHECK_ARRAY, linkerServices, callSiteDescriptor);
    }
    return nextComponent.compose(MethodHandles.guardWithTest(binder.bindTest(checkGuard),
            binder.bind(invocation), nextComponent.getGuardedInvocation().getInvocation()), gi.getGuard(),
            gic.getValidatorClass(), gic.getValidationType());
}
Example 10
Source File: MethodHandleFactory.java    From openjdk-8 with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    return MethodHandles.arrayElementGetter(type);
}
Example 11
Source File: BeanLinker.java    From openjdk-8 with GNU General Public License v2.0 4 votes vote down vote up 
private GuardedInvocationComponent getElementGetter(final CallSiteDescriptor callSiteDescriptor,
        final LinkerServices linkerServices, List<String> operations) throws Exception {
    final MethodType callSiteType = callSiteDescriptor.getMethodType();
    final Class<?> declaredType = callSiteType.parameterType(0);
    final GuardedInvocationComponent nextComponent = getGuardedInvocationComponent(callSiteDescriptor,
            linkerServices, operations);

    // If declared type of receiver at the call site is already an array, a list or map, bind without guard. Thing
    // is, it'd be quite stupid of a call site creator to go though invokedynamic when it knows in advance they're
    // dealing with an array, or a list or map, but hey...
    // Note that for arrays and lists, using LinkerServices.asType() will ensure that any language specific linkers
    // in use will get a chance to perform any (if there's any) implicit conversion to integer for the indices.
    final GuardedInvocationComponent gic;
    final boolean isMap;
    if(declaredType.isArray()) {
        gic = new GuardedInvocationComponent(MethodHandles.arrayElementGetter(declaredType));
        isMap = false;
    } else if(List.class.isAssignableFrom(declaredType)) {
        gic = new GuardedInvocationComponent(GET_LIST_ELEMENT);
        isMap = false;
    } else if(Map.class.isAssignableFrom(declaredType)) {
        gic = new GuardedInvocationComponent(GET_MAP_ELEMENT);
        isMap = true;
    } else if(clazz.isArray()) {
        gic = getClassGuardedInvocationComponent(MethodHandles.arrayElementGetter(clazz), callSiteType);
        isMap = false;
    } else if(List.class.isAssignableFrom(clazz)) {
        gic = new GuardedInvocationComponent(GET_LIST_ELEMENT, Guards.asType(LIST_GUARD, callSiteType), List.class,
                ValidationType.INSTANCE_OF);
        isMap = false;
    } else if(Map.class.isAssignableFrom(clazz)) {
        gic = new GuardedInvocationComponent(GET_MAP_ELEMENT, Guards.asType(MAP_GUARD, callSiteType), Map.class,
                ValidationType.INSTANCE_OF);
        isMap = true;
    } else {
        // Can't retrieve elements for objects that are neither arrays, nor list, nor maps.
        return nextComponent;
    }

    // We can have "dyn:getElem:foo", especially in composites, i.e. "dyn:getElem|getProp|getMethod:foo"
    final String fixedKey = getFixedKey(callSiteDescriptor);
    // Convert the key to a number if we're working with a list or array
    final Object typedFixedKey;
    if(!isMap && fixedKey != null) {
        typedFixedKey = convertKeyToInteger(fixedKey, linkerServices);
        if(typedFixedKey == null) {
            // key is not numeric, it can never succeed
            return nextComponent;
        }
    } else {
        typedFixedKey = fixedKey;
    }

    final GuardedInvocation gi = gic.getGuardedInvocation();
    final Binder binder = new Binder(linkerServices, callSiteType, typedFixedKey);
    final MethodHandle invocation = gi.getInvocation();

    if(nextComponent == null) {
        return gic.replaceInvocation(binder.bind(invocation));
    }

    final MethodHandle checkGuard;
    if(invocation == GET_LIST_ELEMENT) {
        checkGuard = convertArgToInt(RANGE_CHECK_LIST, linkerServices, callSiteDescriptor);
    } else if(invocation == GET_MAP_ELEMENT) {
        // TODO: A more complex solution could be devised for maps, one where we do a get() first, and fold it
        // into a GWT that tests if it returned null, and if it did, do another GWT with containsKey()
        // that returns constant null (on true), or falls back to next component (on false)
        checkGuard = CONTAINS_MAP;
    } else {
        checkGuard = convertArgToInt(RANGE_CHECK_ARRAY, linkerServices, callSiteDescriptor);
    }
    return nextComponent.compose(MethodHandles.guardWithTest(binder.bindTest(checkGuard),
            binder.bind(invocation), nextComponent.getGuardedInvocation().getInvocation()), gi.getGuard(),
            gic.getValidatorClass(), gic.getValidationType());
}
Example 12
Source File: MethodHandleFactory.java    From jdk8u_nashorn with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    final MethodHandle mh = MethodHandles.arrayElementGetter(type);
    return debug(mh, "arrayElementGetter", type);
}
Example 13
Source File: MethodHandleFactory.java    From nashorn with GNU General Public License v2.0 4 votes vote down vote up 
@Override
public MethodHandle arrayElementGetter(final Class<?> type) {
    return MethodHandles.arrayElementGetter(type);
}
Example 14
Source File: BeanLinker.java    From nashorn with GNU General Public License v2.0 4 votes vote down vote up 
private GuardedInvocationComponent getElementGetter(final CallSiteDescriptor callSiteDescriptor,
        final LinkerServices linkerServices, List<String> operations) throws Exception {
    final MethodType callSiteType = callSiteDescriptor.getMethodType();
    final Class<?> declaredType = callSiteType.parameterType(0);
    final GuardedInvocationComponent nextComponent = getGuardedInvocationComponent(callSiteDescriptor,
            linkerServices, operations);

    // If declared type of receiver at the call site is already an array, a list or map, bind without guard. Thing
    // is, it'd be quite stupid of a call site creator to go though invokedynamic when it knows in advance they're
    // dealing with an array, or a list or map, but hey...
    // Note that for arrays and lists, using LinkerServices.asType() will ensure that any language specific linkers
    // in use will get a chance to perform any (if there's any) implicit conversion to integer for the indices.
    final GuardedInvocationComponent gic;
    final boolean isMap;
    if(declaredType.isArray()) {
        gic = new GuardedInvocationComponent(MethodHandles.arrayElementGetter(declaredType));
        isMap = false;
    } else if(List.class.isAssignableFrom(declaredType)) {
        gic = new GuardedInvocationComponent(GET_LIST_ELEMENT);
        isMap = false;
    } else if(Map.class.isAssignableFrom(declaredType)) {
        gic = new GuardedInvocationComponent(GET_MAP_ELEMENT);
        isMap = true;
    } else if(clazz.isArray()) {
        gic = getClassGuardedInvocationComponent(MethodHandles.arrayElementGetter(clazz), callSiteType);
        isMap = false;
    } else if(List.class.isAssignableFrom(clazz)) {
        gic = new GuardedInvocationComponent(GET_LIST_ELEMENT, Guards.asType(LIST_GUARD, callSiteType), List.class,
                ValidationType.INSTANCE_OF);
        isMap = false;
    } else if(Map.class.isAssignableFrom(clazz)) {
        gic = new GuardedInvocationComponent(GET_MAP_ELEMENT, Guards.asType(MAP_GUARD, callSiteType), Map.class,
                ValidationType.INSTANCE_OF);
        isMap = true;
    } else {
        // Can't retrieve elements for objects that are neither arrays, nor list, nor maps.
        return nextComponent;
    }

    // We can have "dyn:getElem:foo", especially in composites, i.e. "dyn:getElem|getProp|getMethod:foo"
    final String fixedKey = getFixedKey(callSiteDescriptor);
    // Convert the key to a number if we're working with a list or array
    final Object typedFixedKey;
    if(!isMap && fixedKey != null) {
        typedFixedKey = convertKeyToInteger(fixedKey, linkerServices);
        if(typedFixedKey == null) {
            // key is not numeric, it can never succeed
            return nextComponent;
        }
    } else {
        typedFixedKey = fixedKey;
    }

    final GuardedInvocation gi = gic.getGuardedInvocation();
    final Binder binder = new Binder(linkerServices, callSiteType, typedFixedKey);
    final MethodHandle invocation = gi.getInvocation();

    if(nextComponent == null) {
        return gic.replaceInvocation(binder.bind(invocation));
    }

    final MethodHandle checkGuard;
    if(invocation == GET_LIST_ELEMENT) {
        checkGuard = convertArgToInt(RANGE_CHECK_LIST, linkerServices, callSiteDescriptor);
    } else if(invocation == GET_MAP_ELEMENT) {
        // TODO: A more complex solution could be devised for maps, one where we do a get() first, and fold it
        // into a GWT that tests if it returned null, and if it did, do another GWT with containsKey()
        // that returns constant null (on true), or falls back to next component (on false)
        checkGuard = CONTAINS_MAP;
    } else {
        checkGuard = convertArgToInt(RANGE_CHECK_ARRAY, linkerServices, callSiteDescriptor);
    }
    return nextComponent.compose(MethodHandles.guardWithTest(binder.bindTest(checkGuard),
            binder.bind(invocation), nextComponent.getGuardedInvocation().getInvocation()), gi.getGuard(),
            gic.getValidatorClass(), gic.getValidationType());
}