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Functional style programming with plain JDBC

There is a newer version: 0.3.10

/*
 * Copyright 2016- Anatoly Kutyakov
 *
 * 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 buckelieg.fn.db;

import javax.annotation.Nonnull;
import java.lang.reflect.Array;
import java.util.Iterator;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicInteger;

final class BoxedPrimitiveIterable implements Iterable {

    private final Object array;
    private final int length;

    BoxedPrimitiveIterable(Object array) {
        this.array = Objects.requireNonNull(array, "Array must be provided");
        this.length = Array.getLength(array);
    }

    @Nonnull
    @Override
    public Iterator iterator() {
        return new Iterator() {

            private AtomicInteger currentIndex = new AtomicInteger();

            @Override
            public boolean hasNext() {
                return currentIndex.get() < length;
            }

            @Override
            public Number next() {
                return (Number) Array.get(array, currentIndex.getAndIncrement());
            }
        };
    }
}