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Collections and collection utilities for Neo4j.

There is a newer version: 5.25.1

/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.internal.helpers.collection;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * Combining one or more {@link Iterable}s, making them look like they were
 * one big iterable. All iteration/combining is done lazily.
 *
 * @param  the type of items in the iteration.
 */
public class CombiningIterable implements Iterable {
    private final Iterable> iterables;

    @SuppressWarnings("unchecked")
    > CombiningIterable(Iterable iterables) {
        this.iterables = (Iterable>) iterables;
    }

    @Override
    public Iterator iterator() {
        List> iterators = new ArrayList<>();
        for (Iterable iterable : iterables) {
            iterators.add(iterable.iterator());
        }
        return new CombiningIterator<>(iterators);
    }
}