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The Amazon Web Services 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 2010-2014 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.auth.policy.conditions;

import java.util.Arrays;
import java.util.Date;

import com.amazonaws.auth.policy.Condition;
import com.amazonaws.util.DateUtils;

/**
 * AWS access control policy condition that allows an access control statement
 * to be conditionally applied based on the comparison of the current time at
 * which a request is received, and a specific date.
 */
public class DateCondition extends Condition {

    private final DateUtils dateUtils = new DateUtils();

    /**
     * Enumeration of the supported ways a date comparison can be evaluated.
     */
    public static enum DateComparisonType {
        DateEquals,
        DateGreaterThan,
        DateGreaterThanEquals,
        DateLessThan,
        DateLessThanEquals,
        DateNotEquals;
    };

    /**
     * Constructs a new access policy condition that compares the current time
     * (on the AWS servers) to the specified date.
     *
     * @param type
     *            The type of comparison to perform. For example,
     *            {@link DateComparisonType#DateLessThan} will cause this policy
     *            condition to evaluate to true if the current date is less than
     *            the date specified in the second argument.
     * @param date
     *            The date to compare against.
     */
    public DateCondition(DateComparisonType type, Date date) {
        super.type = type.toString();
        super.conditionKey = ConditionFactory.CURRENT_TIME_CONDITION_KEY;
        super.values = Arrays.asList(new String[] {dateUtils.formatIso8601Date(date)});
    }

}