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The AWS Android SDK for Amazon Cognito Identity Provider module holds the client classes that are used for communicating with Amazon Cognito Identity Provider Service

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/*
 * Copyright 2013-2016 Amazon.com,
 * Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Amazon Software License (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/asl/
 *
 * or in the "license" file accompanying this file. This file is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, express or implied. See the License
 * for the specific language governing permissions and
 * limitations under the License.
 */

package com.amazonaws.mobileconnectors.cognitoidentityprovider;

import com.amazonaws.mobileconnectors.cognitoidentityprovider.tokens.CognitoAccessToken;
import com.amazonaws.mobileconnectors.cognitoidentityprovider.tokens.CognitoIdToken;
import com.amazonaws.mobileconnectors.cognitoidentityprovider.tokens.CognitoRefreshToken;

import java.util.Date;

/**
 * This wraps all Cognito tokens for a user.
 */
public class CognitoUserSession {
    /**
     * Cognito identity token.
     */
    private CognitoIdToken idToken;

    /**
     * Cognito access token.
     */
    private CognitoAccessToken accessToken;

    /**
     * Cognito refresh token.
     */
    private CognitoRefreshToken refreshToken;

    /**
     * Constructs a new Cognito session.
     *
     * @param idToken               REQUIRED: ID Token for this session.
     * @param accessToken           REQUIRED: Access Token for this session.
     * @param refreshToken          REQUIRED: Refresh Token.
     */
    public CognitoUserSession(CognitoIdToken idToken, CognitoAccessToken accessToken, CognitoRefreshToken refreshToken) {
        this.idToken = idToken;
        this.accessToken = accessToken;
        this.refreshToken = refreshToken;
    }

    /**
     * Returns ID Token.
     *
     * @return  token as a String.
     */
    public CognitoIdToken getIdToken() {
        return idToken;
    }

    /**
     * Returns Access Token.
     *
     * @return token as a String.
     */
    public CognitoAccessToken getAccessToken() {
        return accessToken;
    }

    /**
     * Returns Refresh Token.
     *
     * @return token as a String.
     */
    public CognitoRefreshToken getRefreshToken() {
        return refreshToken;
    }

    /**
     * Returns if the access and id tokens have not expired.
     *
     * @return boolean to indicate if the access and id tokens have not expired.
     */
    public boolean isValid() {
        Date currentTimeStamp = new Date();
        
        try {
            return (currentTimeStamp.before(idToken.getExpiration())
                    & currentTimeStamp.before(accessToken.getExpiration()));
        } catch (Exception e) {
            return false;
        }
    }
 }