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ixjava developed by David Karnok

There is a newer version: 1.0.0

/*
 * Copyright 2011-2016 David Karnok
 *
 * 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 ix;

import java.util.Iterator;

final class IxZip2 extends Ix {

    final Iterable source1;

    final Iterable source2;

    final IxFunction2 zipper;

    IxZip2(Iterable source1, Iterable source2, IxFunction2 zipper) {
        this.source1 = source1;
        this.source2 = source2;
        this.zipper = zipper;
    }

    @Override
    public Iterator iterator() {
        return new Zip2Iterator(source1.iterator(), source2.iterator(), zipper);
    }

    static final class Zip2Iterator extends IxBaseIterator {

        final Iterator source1;

        final Iterator source2;

        final IxFunction2 zipper;

        Zip2Iterator(Iterator source1, Iterator source2, IxFunction2 zipper) {
            this.source1 = source1;
            this.source2 = source2;
            this.zipper = zipper;
        }

        @Override
        protected boolean moveNext() {
            if (!source1.hasNext()) {
                done = true;
                return false;
            }

            T1 t1 = source1.next();

            if (!source2.hasNext()) {
                done = true;
                return false;
            }

            T2 t2 = source2.next();

            value = zipper.apply(t1, t2);
            hasValue = true;
            return true;
        }

    }
}