/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2020 Ziver Koc
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package zutil;

import java.lang.reflect.Array;
import java.util.List;
import java.util.Map;

/**
 * A utility class containing general object functions
 */
public class ObjectUtil {

    /**
     * @return true if all given Objects are null or empty String, List or Map
     */
    public static boolean isEmpty(Object... objs) {
        if (isEmptyCheck(objs))
            return true;

        for (Object obj : objs) {
            if (!isEmptyCheck(obj))
                return false;
        }

        return true;
    }

    /**
     * @return true if obj is null or empty String, List, Map
     */
    private static boolean isEmptyCheck(Object obj) {
        if (obj == null)
            return true;

        if (obj instanceof Map)
            return ((Map) obj).isEmpty();
        else if (obj instanceof List)
            return ((List) obj).isEmpty();
        else if (obj.getClass().isArray())
            return (Array.getLength(obj) == 0);
        else if (obj instanceof CharSequence)
            return ((CharSequence) obj).length() == 0;

        return false; // We don't know the type of class, but it is not null
    }
}
