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/*
 * Copyright 2010-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 com.amazonaws.util;

import java.util.Collection;
import java.util.LinkedList;
import java.util.List;

public class CollectionUtils {

    public static  boolean isNullOrEmpty(Collection collection) {
        return collection == null || collection.isEmpty();
    }

    /**
     * Returns a new list containing the second list appended to the first list.
     */
    public static  List mergeLists(List list1, List list2) {
        List merged = new LinkedList();
        if (list1 != null) {
            merged.addAll(list1);
        }
        if (list2 != null) {
            merged.addAll(list2);
        }
        return merged;
    }
}