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

Example 51 with ScriptObject

use of com.github.anba.es6draft.runtime.types.ScriptObject 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 52 with ScriptObject

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

the class ProxyObject method ownEnumerablePropertyKeys.

/**
     * 9.5.12 [[OwnPropertyKeys]] ()
     */
@Override
public Iterator<String> ownEnumerablePropertyKeys(ExecutionContext cx) {
    /* steps 1-3 */
    ScriptObject handler = getProxyHandler(cx);
    /* step 4 */
    ScriptObject target = getProxyTarget();
    /* steps 5-6 */
    Callable trap = GetMethod(cx, handler, "ownKeys");
    /* step 7 */
    if (trap == null) {
        return target.ownEnumerablePropertyKeys(cx);
    }
    /* step 8 */
    Object trapResultArray = trap.call(cx, handler, target);
    /* steps 9-25 */
    List<?> ownKeys = validateOwnPropertyKeys(cx, target, trapResultArray);
    List<String> enumerableKeys = new ArrayList<>();
    for (Object key : ownKeys) {
        if (key instanceof String) {
            enumerableKeys.add((String) key);
        }
    }
    return enumerableKeys.iterator();
}

Example 53 with ScriptObject

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

the class ProxyObject method validateOwnPropertyKeys.

private List<Object> validateOwnPropertyKeys(ExecutionContext cx, ScriptObject target, Object trapResultArray) {
    /* steps 9-10 */
    List<Object> trapResult = CreateListFromArrayLike(cx, trapResultArray, EnumSet.of(Type.String, Type.Symbol));
    /* steps 11-12 */
    boolean extensibleTarget = target.isExtensible(cx);
    /* steps 13-15 */
    List<?> targetKeys = target.ownPropertyKeys(cx);
    /* step 16 */
    ArrayList<Object> targetConfigurableKeys = new ArrayList<>();
    /* step 17 */
    ArrayList<Object> targetNonConfigurableKeys = new ArrayList<>();
    /* step 18 */
    for (Object key : targetKeys) {
        Property desc = target.getOwnProperty(cx, key);
        if (desc != null && !desc.isConfigurable()) {
            targetNonConfigurableKeys.add(key);
        } else {
            targetConfigurableKeys.add(key);
        }
    }
    /* step 19 */
    if (extensibleTarget && targetNonConfigurableKeys.isEmpty()) {
        return trapResult;
    }
    /* step 20 */
    final Integer zero = Integer.valueOf(0);
    HashMap<Object, Integer> uncheckedResultKeys = new HashMap<>();
    for (Object key : trapResult) {
        Integer c = uncheckedResultKeys.put(key, zero);
        if (c != null) {
            uncheckedResultKeys.put(key, c + 1);
        }
    }
    /* step 21 */
    for (Object key : targetNonConfigurableKeys) {
        Integer c = uncheckedResultKeys.remove(key);
        if (c == null) {
            throw newTypeError(cx, Messages.Key.ProxyNotConfigurable);
        }
        if (c > 0) {
            uncheckedResultKeys.put(key, c - 1);
        }
    }
    /* step 22 */
    if (extensibleTarget) {
        return trapResult;
    }
    /* step 23 */
    for (Object key : targetConfigurableKeys) {
        Integer c = uncheckedResultKeys.remove(key);
        if (c == null) {
            throw newTypeError(cx, Messages.Key.ProxyNotExtensible);
        }
        if (c > 0) {
            uncheckedResultKeys.put(key, c - 1);
        }
    }
    /* step 24 */
    if (!uncheckedResultKeys.isEmpty()) {
        throw newTypeError(cx, Messages.Key.ProxyAbsentNotExtensible);
    }
    /* step 25 */
    return trapResult;
}

Example 54 with ScriptObject

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

the class ProxyObject method set.

/**
     * 9.5.9 [[Set]] ( P, V, Receiver)
     */
@Override
public boolean set(ExecutionContext cx, String propertyKey, Object value, Object receiver) {
    /* step 1 (implicit) */
    /* steps 2-4 */
    ScriptObject handler = getProxyHandler(cx);
    /* step 5 */
    ScriptObject target = getProxyTarget();
    /* steps 6-7 */
    Callable trap = GetMethod(cx, handler, "set");
    /* step 8 */
    if (trap == null) {
        return target.set(cx, propertyKey, value, receiver);
    }
    /* steps 9-10 */
    boolean trapResult = ToBoolean(trap.call(cx, handler, target, propertyKey, value, receiver));
    /* step 11 */
    if (!trapResult) {
        return false;
    }
    /* steps 12-13 */
    Property targetDesc = target.getOwnProperty(cx, propertyKey);
    /* steps 14-15 */
    return validateSet(cx, value, targetDesc);
}

Example 55 with ScriptObject

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

the class ProxyObject method setPrototypeOf.

/**
     * 9.5.2 [[SetPrototypeOf]] (V)
     */
@Override
public boolean setPrototypeOf(ExecutionContext cx, ScriptObject prototype) {
    /* step 1 (implicit) */
    /* steps 2-4 */
    ScriptObject handler = getProxyHandler(cx);
    /* step 5 */
    ScriptObject target = getProxyTarget();
    /* step 6 */
    Callable trap = GetMethod(cx, handler, "setPrototypeOf");
    /* step 7 */
    if (trap == null) {
        return target.setPrototypeOf(cx, prototype);
    }
    /* step 8 */
    Object prototypeValue = prototype != null ? prototype : NULL;
    boolean trapResult = ToBoolean(trap.call(cx, handler, target, prototypeValue));
    /* step 9 */
    if (!trapResult) {
        return false;
    }
    /* step 10 */
    boolean extensibleTarget = IsExtensible(cx, target);
    /* step 11 */
    if (extensibleTarget) {
        return true;
    }
    /* step 12 */
    ScriptObject targetProto = target.getPrototypeOf(cx);
    /* step 13 */
    if (prototype != targetProto) {
        throw newTypeError(cx, Messages.Key.ProxySamePrototype);
    }
    /* step 14 */
    return true;
}