Java ScriptObject.isArray方法代码示例

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * Make a script object mirror on given object if needed.
 *
 * @param obj object to be wrapped/converted
 * @param homeGlobal global to which this object belongs.
 * @param jsonCompatible if true, the created wrapper will implement the Java {@code List} interface if
 * {@code obj} is a JavaScript {@code Array} object. Arrays retrieved through its properties (transitively)
 * will also implement the list interface.
 * @return wrapped/converted object
 */
private static Object wrap(final Object obj, final Object homeGlobal, final boolean jsonCompatible) {
    if(obj instanceof ScriptObject) {
        if (!(homeGlobal instanceof Global)) {
            return obj;
        }
        final ScriptObject sobj = (ScriptObject)obj;
        final Global global = (Global)homeGlobal;
        final ScriptObjectMirror mirror = new ScriptObjectMirror(sobj, global, jsonCompatible);
        if (jsonCompatible && sobj.isArray()) {
            return new JSONListAdapter(mirror, global);
        }
        return mirror;
    } else if(obj instanceof ConsString) {
        return obj.toString();
    } else if (jsonCompatible && obj instanceof ScriptObjectMirror) {
        // Since choosing JSON compatible representation is an explicit decision on user's part, if we're asked to
        // wrap a mirror that was not JSON compatible, explicitly create its compatible counterpart following the
        // principle of least surprise.
        return ((ScriptObjectMirror)obj).asJSONCompatible();
    }
    return obj;
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * ArrayLikeIterator factory
 * @param object object over which to do reverse element iteration
 * @param includeUndefined should undefined elements be included in the iteration
 * @return iterator
 */
public static ArrayLikeIterator<Object> arrayLikeIterator(final Object object, final boolean includeUndefined) {
    Object obj = object;

    if (ScriptObject.isArray(obj)) {
        return new ScriptArrayIterator((ScriptObject) obj, includeUndefined);
    }

    obj = JSType.toScriptObject(obj);
    if (obj instanceof ScriptObject) {
        return new ScriptObjectIterator((ScriptObject)obj, includeUndefined);
    }

    if (obj instanceof JSObject) {
        return new JSObjectIterator((JSObject)obj, includeUndefined);
    }

    if (obj instanceof List) {
        return new JavaListIterator((List<?>)obj, includeUndefined);
    }

    if (obj != null && obj.getClass().isArray()) {
        return new JavaArrayIterator(obj, includeUndefined);
    }

    return new EmptyArrayLikeIterator();
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * ArrayLikeIterator factory (reverse order)
 * @param object object over which to do reverse element iteration
 * @param includeUndefined should undefined elements be included in the iteration
 * @return iterator
 */
public static ArrayLikeIterator<Object> reverseArrayLikeIterator(final Object object, final boolean includeUndefined) {
    Object obj = object;

    if (ScriptObject.isArray(obj)) {
        return new ReverseScriptArrayIterator((ScriptObject) obj, includeUndefined);
    }

    obj = JSType.toScriptObject(obj);
    if (obj instanceof ScriptObject) {
        return new ReverseScriptObjectIterator((ScriptObject)obj, includeUndefined);
    }

    if (obj instanceof JSObject) {
        return new ReverseJSObjectIterator((JSObject)obj, includeUndefined);
    }

    if (obj instanceof List) {
        return new ReverseJavaListIterator((List<?>)obj, includeUndefined);
    }

    if (obj != null && obj.getClass().isArray()) {
        return new ReverseJavaArrayIterator(obj, includeUndefined);
    }

    return new EmptyArrayLikeIterator();
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
private static boolean isArrayWithDefaultToString(final Object result, final Global global) {
    if (result instanceof ScriptObject) {
        final ScriptObject sobj = (ScriptObject) result;
        return sobj.isArray() && sobj.get("toString") == global.getArrayPrototype().get("toString");
    }
    return false;
}
 

import jdk.nashorn.internal.runtime.ScriptObject; //导入方法依赖的package包/类
/**
 * Determine if Java bulk array operations may be used on the underlying
 * storage. This is possible only if the object's prototype chain is empty
 * or each of the prototypes in the chain is empty.
 *
 * @param self the object to examine
 * @return true if optimizable
 */
private static boolean bulkable(final ScriptObject self) {
    return self.isArray() && !hasInheritedArrayEntries(self) && !self.isLengthNotWritable();
}