rx.internal.operators.OperatorSkipWhile Maven / Gradle / Ivy
/**
* 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.internal.operators;
import rx.Observable.Operator;
import rx.Subscriber;
import rx.functions.Func1;
import rx.functions.Func2;
/**
* Skips any emitted source items as long as the specified condition holds true. Emits all further source items
* as soon as the condition becomes false.
*/
public final class OperatorSkipWhile implements Operator {
private final Func2 predicate;
public OperatorSkipWhile(Func2 predicate) {
this.predicate = predicate;
}
@Override
public Subscriber call(final Subscriber child) {
return new Subscriber(child) {
boolean skipping = true;
int index;
@Override
public void onNext(T t) {
if (!skipping) {
child.onNext(t);
} else {
if (!predicate.call(t, index++)) {
skipping = false;
child.onNext(t);
} else {
request(1);
}
}
}
@Override
public void onError(Throwable e) {
child.onError(e);
}
@Override
public void onCompleted() {
child.onCompleted();
}
};
}
/** Convert to Func2 type predicate. */
public static Func2 toPredicate2(final Func1 predicate) {
return new Func2() {
@Override
public Boolean call(T t1, Integer t2) {
return predicate.call(t1);
}
};
}
}