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The AWS SDK for Java with support for OSGi. The AWS SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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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;
    }
}