Class NativeProxy

rhino/src/main/java/org/mozilla/javascript/NativeProxy.java:22–1379

This class implements the Proxy object. @author Ronald Brill

 * @author Ronald Brill
 */
class NativeProxy extends ScriptableObject {
    @Serial private static final long serialVersionUID = 6676871870513494844L;

    private static final String PROXY_TAG = "Proxy";

    private static final String TRAP_GET_PROTOTYPE_OF = "getPrototypeOf";
    private static final String TRAP_SET_PROTOTYPE_OF = "setPrototypeOf";
    private static final String TRAP_IS_EXTENSIBLE = "isExtensible";
    private static final String TRAP_PREVENT_EXTENSIONS = "preventExtensions";
    private static final String TRAP_GET_OWN_PROPERTY_DESCRIPTOR = "getOwnPropertyDescriptor";
    private static final String TRAP_DEFINE_PROPERTY = "defineProperty";
    private static final String TRAP_HAS = "has";
    private static final String TRAP_GET = "get";
    private static final String TRAP_SET = "set";
    private static final String TRAP_DELETE_PROPERTY = "deleteProperty";
    private static final String TRAP_OWN_KEYS = "ownKeys";
    private static final String TRAP_APPLY = "apply";
    private static final String TRAP_CONSTRUCT = "construct";

    private static final ClassDescriptor DESCRIPTOR;

    static {
        DESCRIPTOR =
                new ClassDescriptor.Builder(
                                PROXY_TAG,
                                2,
                                ClassDescriptor.typeError(),
                                NativeProxy::js_constructor)
                        .withMethod(CTOR, "revocable", 2, NativeProxy::revocable)
                        .build();
    }

    private ScriptableObject targetObj;
    private Scriptable handlerObj;
    private final String typeOf;

    private static final class Revoker implements SerializableCallable {
        private NativeProxy revocableProxy = null;

        public Revoker(NativeProxy proxy) {
            revocableProxy = proxy;
        }

        @Override
        public Object call(Context cx, VarScope scope, Scriptable thisObj, Object[] args) {
            if (revocableProxy != null) {
                revocableProxy.handlerObj = null;
                revocableProxy.targetObj = null;
                revocableProxy = null;
            }
            return Undefined.instance;
        }
    }

    public static Object init(Context cx, VarScope scope, boolean sealed) {
        return DESCRIPTOR.buildConstructor(cx, scope, null, sealed);
    }