HMCL/HMCLAPI/src/main/java/rx/operators/OperationToObservableIterable.java

/**
 * Copyright 2013 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.Observer;
import rx.Subscription;
import rx.subscriptions.Subscriptions;
import rx.util.functions.Func1;

/**
 * Accepts an Iterable object and exposes it as an Observable.
 *
 * @param <T> The type of the Iterable sequence.
 */
public final class OperationToObservableIterable<T> {

    public static <T> Func1<Observer<T>, Subscription> toObservableIterable(Iterable<T> iterable) {
        return (Observer<T> observer) -> {
            for (T item : iterable)
                observer.onNext(item);
            observer.onCompleted();

            return Subscriptions.empty();
        };
    }
}