Examples with PropertyDescriptor com.github.anba.es6draft.runtime.types.PropertyDescriptor used on opensource projects

Example 1 with PropertyDescriptor

use of com.github.anba.es6draft.runtime.types.PropertyDescriptor in project es6draft by anba.

the class ArgumentsObject method defineProperty.

/**
     * 9.4.4.2 [[DefineOwnProperty]] (P, Desc)
     */
@Override
protected boolean defineProperty(ExecutionContext cx, long propertyKey, PropertyDescriptor desc) {
    /* step 1 (not applicable) */
    /* step 2 */
    ParameterMap map = this.parameterMap;
    /* step 3 */
    boolean isMapped = map != null && map.hasOwnProperty(propertyKey);
    /* step 4 */
    PropertyDescriptor newArgDesc = desc;
    /* step 5 */
    if (isMapped && desc.isDataDescriptor()) {
        /* step 5.a */
        if (!desc.hasValue() && desc.hasWritable() && !desc.isWritable()) {
            newArgDesc = desc.clone();
            newArgDesc.setValue(map.get(propertyKey));
        }
    }
    /* step 6 */
    boolean allowed = ordinaryDefineOwnProperty(cx, propertyKey, newArgDesc);
    /* step 7 */
    if (!allowed) {
        return false;
    }
    /* step 8 */
    if (isMapped) {
        if (desc.isAccessorDescriptor()) {
            map.delete(propertyKey);
        } else {
            if (desc.hasValue()) {
                map.put(propertyKey, desc.getValue());
            }
            if (desc.hasWritable() && !desc.isWritable()) {
                map.delete(propertyKey);
            }
        }
    }
    hasIndexedAccessors |= desc.isAccessorDescriptor();
    /* step 9 */
    return true;
}

Example 2 with PropertyDescriptor

use of com.github.anba.es6draft.runtime.types.PropertyDescriptor in project es6draft by anba.

the class OrdinaryObject method setValue.

/**
     * 9.1.9 [[Set] (P, V, Receiver)
     * 
     * @param cx
     *            the execution context
     * @param propertyKey
     *            the property key
     * @param value
     *            the new property value
     * @param receiver
     *            the receiver object
     * @return {@code true} on success
     */
protected boolean setValue(ExecutionContext cx, Symbol propertyKey, Object value, Object receiver) {
    /* step 1 (implicit) */
    /* steps 2-3 */
    Property ownDesc = getProperty(cx, propertyKey);
    /* step 4 */
    if (ownDesc == null) {
        ScriptObject parent = getPrototypeOf(cx);
        if (parent != null) {
            return parent.set(cx, propertyKey, value, receiver);
        } else {
            ownDesc = new Property(UNDEFINED, true, true, true);
        }
    } else if (receiver == this && ownDesc.isWritable()) {
        // Optimize the common case for own, writable properties
        return setPropertyValue(cx, propertyKey, value, ownDesc);
    }
    /* step 5 */
    if (ownDesc.isDataDescriptor()) {
        if (!ownDesc.isWritable()) {
            return false;
        }
        if (!Type.isObject(receiver)) {
            return false;
        }
        ScriptObject _receiver = Type.objectValue(receiver);
        Property existingDescriptor = _receiver.getOwnProperty(cx, propertyKey);
        if (existingDescriptor != null) {
            if (existingDescriptor.isAccessorDescriptor() || !existingDescriptor.isWritable()) {
                return false;
            }
            PropertyDescriptor valueDesc = new PropertyDescriptor(value);
            return _receiver.defineOwnProperty(cx, propertyKey, valueDesc);
        } else {
            return CreateDataProperty(cx, _receiver, propertyKey, value);
        }
    }
    /* step 6 */
    assert ownDesc.isAccessorDescriptor();
    Callable setter = ownDesc.getSetter();
    if (setter == null) {
        return false;
    }
    setter.call(cx, receiver, value);
    return true;
}

Example 3 with PropertyDescriptor

use of com.github.anba.es6draft.runtime.types.PropertyDescriptor in project es6draft by anba.

the class OrdinaryObject method setValue.

/**
     * 9.1.9 [[Set] (P, V, Receiver)
     * 
     * @param cx
     *            the execution context
     * @param propertyKey
     *            the property key
     * @param value
     *            the new property value
     * @param receiver
     *            the receiver object
     * @return {@code true} on success
     */
protected boolean setValue(ExecutionContext cx, String propertyKey, Object value, Object receiver) {
    /* step 1 (implicit) */
    /* steps 2-3 */
    Property ownDesc = getProperty(cx, propertyKey);
    /* step 4 */
    if (ownDesc == null) {
        ScriptObject parent = getPrototypeOf(cx);
        if (parent != null) {
            return parent.set(cx, propertyKey, value, receiver);
        } else {
            ownDesc = new Property(UNDEFINED, true, true, true);
        }
    } else if (receiver == this && ownDesc.isWritable()) {
        // Optimize the common case for own, writable properties
        return setPropertyValue(cx, propertyKey, value, ownDesc);
    }
    /* step 5 */
    if (ownDesc.isDataDescriptor()) {
        if (!ownDesc.isWritable()) {
            return false;
        }
        if (!Type.isObject(receiver)) {
            return false;
        }
        ScriptObject _receiver = Type.objectValue(receiver);
        Property existingDescriptor = _receiver.getOwnProperty(cx, propertyKey);
        if (existingDescriptor != null) {
            if (existingDescriptor.isAccessorDescriptor() || !existingDescriptor.isWritable()) {
                return false;
            }
            PropertyDescriptor valueDesc = new PropertyDescriptor(value);
            return _receiver.defineOwnProperty(cx, propertyKey, valueDesc);
        } else {
            return CreateDataProperty(cx, _receiver, propertyKey, value);
        }
    }
    /* step 6 */
    assert ownDesc.isAccessorDescriptor();
    Callable setter = ownDesc.getSetter();
    if (setter == null) {
        return false;
    }
    setter.call(cx, receiver, value);
    return true;
}

Example 4 with PropertyDescriptor

use of com.github.anba.es6draft.runtime.types.PropertyDescriptor in project es6draft by anba.

the class Properties method createExternalAccessors.

private static <OWNER> void createExternalAccessors(ExecutionContext cx, ScriptObject target, OWNER owner, ObjectLayout layout, Converter converter) {
    LinkedHashMap<String, PropertyDescriptor> stringProps = new LinkedHashMap<>();
    EnumMap<BuiltinSymbol, PropertyDescriptor> symbolProps = new EnumMap<>(BuiltinSymbol.class);
    for (Entry<Accessor, MethodHandle> entry : layout.accessors.entrySet()) {
        MethodHandle handle = getInstanceMethodHandle(cx, converter, entry.getValue(), owner);
        createExternalAccessor(cx, entry.getKey(), handle, stringProps, symbolProps);
    }
    defineProperties(cx, target, stringProps, symbolProps);
}

Example 5 with PropertyDescriptor

use of com.github.anba.es6draft.runtime.types.PropertyDescriptor in project es6draft by anba.

the class Properties method createExternalAccessor.

private static void createExternalAccessor(ExecutionContext cx, Accessor accessor, MethodHandle mh, LinkedHashMap<String, PropertyDescriptor> stringProps, EnumMap<BuiltinSymbol, PropertyDescriptor> symbolProps) {
    Accessor.Type type = accessor.type();
    String name = accessor.name();
    BuiltinSymbol symbol = accessor.symbol();
    Attributes attributes = accessor.attributes();
    String functionName = accessorName(type, name, symbol);
    int arity = accessorArity(type);
    NativeFunction fun = new NativeFunction(cx.getRealm(), functionName, arity, mh);
    PropertyDescriptor existing;
    if (symbol == BuiltinSymbol.NONE) {
        existing = stringProps.get(name);
    } else {
        existing = symbolProps.get(symbol);
    }
    PropertyDescriptor desc;
    if (existing != null) {
        if (attributes.enumerable() != existing.isEnumerable() || attributes.configurable() != existing.isConfigurable()) {
            throw new IllegalArgumentException();
        }
        if (type == Accessor.Type.Getter ? existing.getGetter() != null : existing.getSetter() != null) {
            throw new IllegalArgumentException();
        }
        desc = existing;
    } else {
        desc = propertyDescriptor(null, null, attributes);
    }
    if (type == Accessor.Type.Getter) {
        desc.setGetter(fun);
    } else {
        desc.setSetter(fun);
    }
    if (symbol == BuiltinSymbol.NONE) {
        stringProps.put(name, desc);
    } else {
        symbolProps.put(symbol, desc);
    }
}