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rxjava-core developed by Netflix

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/**
 * 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;
import rx.Subscriber;

/**
 * Returns an Observable that skips the first num items emitted by the source
 * Observable.
 * 
 * 
 * 
 * You can ignore the first num items emitted by an Observable and attend only to
 * those items that come after, by modifying the Observable with the skip operation.
 */
public final class OperatorSkip implements Observable.Operator {

    final int n;

    public OperatorSkip(int n) {
        this.n = n;
    }

    @Override
    public Subscriber call(final Subscriber child) {
        return new Subscriber(child) {

           int skipped = 0;

            @Override
            public void onCompleted() {
                child.onCompleted();
            }

            @Override
            public void onError(Throwable e) {
                child.onError(e);
            }

            @Override
            public void onNext(T t) {
                if(skipped >= n) {
                    child.onNext(t);
                } else {
                    skipped += 1;
                }
            }

        };
    }

}