/**
* Copyright (c) 2012-2016 André Bargull
* Alle Rechte vorbehalten / All Rights Reserved. Use is subject to license terms.
*
* <https://github.com/anba/es6draft>
*/
package com.github.anba.es6draft.runtime.objects.observable;
import static com.github.anba.es6draft.runtime.internal.Errors.newTypeError;
import static com.github.anba.es6draft.runtime.internal.Properties.createProperties;
import static com.github.anba.es6draft.runtime.objects.observable.SubscriptionAbstractOperations.CleanupSubscription;
import static com.github.anba.es6draft.runtime.objects.observable.SubscriptionAbstractOperations.SubscriptionClosed;
import static com.github.anba.es6draft.runtime.types.Undefined.UNDEFINED;
import com.github.anba.es6draft.runtime.ExecutionContext;
import com.github.anba.es6draft.runtime.Realm;
import com.github.anba.es6draft.runtime.internal.Initializable;
import com.github.anba.es6draft.runtime.internal.Messages;
import com.github.anba.es6draft.runtime.internal.Properties.Function;
import com.github.anba.es6draft.runtime.internal.Properties.Prototype;
import com.github.anba.es6draft.runtime.types.Intrinsics;
import com.github.anba.es6draft.runtime.types.builtins.OrdinaryObject;
/**
* <h1>Observable</h1>
* <ul>
* <li>The %SubscriptionPrototype% Object
* </ul>
*/
public final class SubscriptionPrototype extends OrdinaryObject implements Initializable {
/**
* Constructs a new %SubscriptionPrototype% object.
*
* @param realm
* the realm object
*/
public SubscriptionPrototype(Realm realm) {
super(realm);
}
@Override
public void initialize(Realm realm) {
createProperties(realm, this, Properties.class);
}
/**
* Properties of the %SubscriptionPrototype% Object
*/
public enum Properties {
;
@Prototype
public static final Intrinsics __proto__ = Intrinsics.ObjectPrototype;
/**
* %SubscriptionPrototype%.unsubscribe ( )
*
* @param cx
* the execution context
* @param thisValue
* the function this-value
* @return the undefined value
*/
@Function(name = "unsubscribe", arity = 0)
public static Object unsubscribe(ExecutionContext cx, Object thisValue) {
/* steps 2-3 */
if (!(thisValue instanceof SubscriptionObject)) {
throw newTypeError(cx, Messages.Key.IncompatibleObject);
}
/* step 1 */
SubscriptionObject subscription = (SubscriptionObject) thisValue;
/* step 4 */
if (SubscriptionClosed(subscription)) {
return UNDEFINED;
}
/* step 5 */
subscription.clearObserver();
/* step 6 */
CleanupSubscription(cx, subscription);
return UNDEFINED;
}
}
}