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/*
 * Copyright 1&1 Internet AG, http://www.1and1.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 */

package net.sf.beezle.mork.reflect;

import java.lang.reflect.Array;

/**
 * Additional functionality over java.util.Arrays.
 */

public class Arrays {
    public static Object[] append(Class cl, Object[] left, Object[] right) {
        Object[] result;

        result = (Object[]) Array.newInstance(cl, left.length + right.length);
        System.arraycopy(left, 0, result, 0, left.length);
        System.arraycopy(right, 0, result, left.length, right.length);
        return result;
    }

    public static Object[] cons(Class cl, Object left, Object[] right) {
        Object[] result;

        result = (Object[]) Array.newInstance(cl, 1 + right.length);
        result[0] = left;
        System.arraycopy(right, 0, result, 1, right.length);
        return result;
    }

    public static Object[] pair(Class cl, Object left, Object right) {
        Object[] result;

        result = (Object[]) Array.newInstance(cl, 2);
        result[0] = left;
        result[1] = right;
        return result;
    }

    /**
     * Return an array class object with component as component type.
     * The API decription for java.lang.Class (Java 2) mentions
     * that forName can be called with an Array name, but neither
     * Class.forName("java.lang.String[]") nor
     * Class.forName("[java.lang.String") returns an array class!?
     */
    public static Class getArrayClass(Class component) {
        return Array.newInstance(component, 0).getClass();
    }
}