Copyright (c) 2016-present, RxJava Contributors.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is
distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
the License for the specific language governing permissions and limitations under the License.
/**
 * Copyright (c) 2016-present, RxJava Contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
 * the License for the specific language governing permissions and limitations under the License.
 */
package io.reactivex.internal.subscriptions;

import java.util.concurrent.atomic.AtomicBoolean;

import org.reactivestreams.Subscription;

Subscription implementation that ignores request but remembers the cancellation
which can be checked via isCancelled.
/**
 * Subscription implementation that ignores request but remembers the cancellation
 * which can be checked via isCancelled.
 */
public final class BooleanSubscription extends AtomicBoolean implements Subscription {

    private static final long serialVersionUID = -8127758972444290902L;

    @Override
    public void request(long n) {
        SubscriptionHelper.validate(n);
    }

    @Override
    public void cancel() {
        lazySet(true);
    }

    
Returns true if this BooleanSubscription has been cancelled.
Returns:
true if this BooleanSubscription has been cancelled/**
     * Returns true if this BooleanSubscription has been cancelled.
     * @return true if this BooleanSubscription has been cancelled
     */
    public boolean isCancelled() {
        return get();
    }

    @Override
    public String toString() {
        return "BooleanSubscription(cancelled=" + get() + ")";
    }
}