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/*
 * Copyright 2016 Google 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 emujava.util.concurrent.impl;

/**
 *
 */
final class NativePromisesImpl implements Promises {

    @Override
    public Promise allOf(Promise[] promises) {
        assert promises.length > 0;
        return new NativePromiseImpl<>(JsPromise.all(unwrap(promises)));
    }

    @Override
    public Promise anyOf(Promise[] promises) {
        assert promises.length > 0;
        return new NativePromiseImpl<>(JsPromise.race(unwrap(promises)));
    }

    @Override
    public  Promise completed(V value) {
        return new NativePromiseImpl<>(JsPromise.resolve(null));
    }

    @Override
    public  Promise incomplete() {
        return new NativePromiseImpl<>();
    }

    private static JsPromise[] unwrap(Promise[] promises) {
        int length = promises.length;
        JsPromise[] jsPromises = new JsPromise[length];
        for(int i = 0; i < length; ++i) {
            jsPromises[i] = ((NativePromiseImpl)promises[i]).jsPromise;
        }
        return jsPromises;
    }
}