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The AWS Java SDK for Amazon DynamoDB module holds the client classes that are used for communicating with Amazon DynamoDB Service

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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;

/**
 * Precedence of various Conditions.
 */
@Immutable
enum Precedence {
    Comparator(700),    // = <> < <= > >=
    IN(600),
    BETWEEN(500),
    Function(400),  // attribute_exists attribute_not_exists begins_with contains
    Parentheses(300),
    NOT(200),
    AND(100),
    OR(0),
    ;
    /**
     * The higher this value, the higher the precedence.
     */
    private final int value;

    private Precedence(int value) { this.value = value; }

    int value() {
        return value;
    }
}