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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 2015-2016 Amazon Technologies, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *    http://aws.amazon.com/apache2.0
 *
 * 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.services.dynamodbv2.xspec;

import org.apache.http.annotation.Immutable;

import com.amazonaws.annotation.Beta;

/**
 * A path operand that refers to a NULL attribute in DynamoDB; used for building expressions.
 * 
 * Use {@link ExpressionSpecBuilder#NULL(String)} to instantiate this class.
 */
@Beta
@Immutable
public class NULL extends PathOperand {

    NULL(String path) {
        super(path);
    }

    /**
     * Returns a SetAction object (used for building update
     * expression) of setting an attribute to null.
     */
    public final SetAction set() {
        return new SetAction(this, new LiteralOperand((Object)null));
    }
}