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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.services.dynamodbv2.model;

/**
 * 
 */
public enum ComparisonOperator {

    EQ("EQ"),
    NE("NE"),
    IN("IN"),
    LE("LE"),
    LT("LT"),
    GE("GE"),
    GT("GT"),
    BETWEEN("BETWEEN"),
    NOT_NULL("NOT_NULL"),
    NULL("NULL"),
    CONTAINS("CONTAINS"),
    NOT_CONTAINS("NOT_CONTAINS"),
    BEGINS_WITH("BEGINS_WITH");

    private String value;

    private ComparisonOperator(String value) {
        this.value = value;
    }

    @Override
    public String toString() {
        return this.value;
    }

    /**
     * Use this in place of valueOf.
     *
     * @param value
     *        real value
     * @return ComparisonOperator corresponding to the value
     */
    public static ComparisonOperator fromValue(String value) {
        if (value == null || "".equals(value)) {
            throw new IllegalArgumentException("Value cannot be null or empty!");
        } else if ("EQ".equals(value)) {
            return EQ;
        } else if ("NE".equals(value)) {
            return NE;
        } else if ("IN".equals(value)) {
            return IN;
        } else if ("LE".equals(value)) {
            return LE;
        } else if ("LT".equals(value)) {
            return LT;
        } else if ("GE".equals(value)) {
            return GE;
        } else if ("GT".equals(value)) {
            return GT;
        } else if ("BETWEEN".equals(value)) {
            return BETWEEN;
        } else if ("NOT_NULL".equals(value)) {
            return NOT_NULL;
        } else if ("NULL".equals(value)) {
            return NULL;
        } else if ("CONTAINS".equals(value)) {
            return CONTAINS;
        } else if ("NOT_CONTAINS".equals(value)) {
            return NOT_CONTAINS;
        } else if ("BEGINS_WITH".equals(value)) {
            return BEGINS_WITH;
        } else {
            throw new IllegalArgumentException("Cannot create enum from "
                    + value + " value!");
        }
    }
}