/*
 * Copyright (c) 2017, Red Hat Inc. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */
package org.openjdk.gcbench.tests;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

class DimensionValues {
    Object[] values;

    public static List<DimensionValues> product(Dimension... dimensions) {
        List<DimensionValues> values = new ArrayList<>();

        for (Dimension d : dimensions) {
            List<DimensionValues> nextValues = new ArrayList<>();
            if (values.isEmpty()) {
                for (Object v : d.seq()) {
                    nextValues.add(new DimensionValues(new Object[]{v}));
                }
            } else {
                for (DimensionValues vs : values) {
                    for (Object v : d.seq()) {
                        nextValues.add(vs.addNew(v));
                    }
                }
            }
            values = nextValues;
        }
        return values;
    }


    public DimensionValues(Object[] values) {
        this.values = values;
    }

    DimensionValues addNew(Object value) {
        Object[] nv = Arrays.copyOf(values, values.length + 1);
        nv[nv.length - 1] = value;
        return new DimensionValues(nv);
    }
}