/**

* Copyright 2014 Netflix, Inc.

*

* 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 rx.operators;

import rx.Observable.Operator;

import rx.Subscriber;

import rx.functions.Func1;

/**

* Returns an Observable that emits a Boolean that indicates whether all items emitted by an

* Observable satisfy a condition.

* <p>

* <img width="640" src="https://github.com/Netflix/RxJava/wiki/images/rx-operators/all.png">

*/

public final class OperatorAll<T> implements Operator<Boolean, T> {

private final Func1<? super T, Boolean> predicate;

public OperatorAll(Func1<? super T, Boolean> predicate) {

this.predicate = predicate;

}

@Override

public Subscriber<? super T> call(final Subscriber<? super Boolean> child) {

return new Subscriber<T>(child) {

boolean done;

@Override

public void onNext(T t) {

boolean result = predicate.call(t);

if (!result && !done) {

done = true;

child.onNext(false);

child.onCompleted();

unsubscribe();

}

}

@Override

public void onError(Throwable e) {

child.onError(e);

}

@Override

public void onCompleted() {

if (!done) {

done = true;

child.onNext(true);

child.onCompleted();

}

}

};

}

}