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Tencent Cloud API SDK for Java
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/*
 * Copyright (c) 2018 THL A29 Limited, a Tencent company. 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.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License 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.tencentcloudapi.common;

import com.tencentcloudapi.common.exception.TencentCloudSDKException;

/**
 * Credential has many types in Tencent Cloud Access Management service.
 *
 * We mainly use two of them:
 *
 * 
Permanent credential: SecretId & SecretKey, can only be obtained from Tencent Cloud Management
 * Console, https://console.cloud.tencent.com/cam/capi.
 *
 * Ephemeral credential, can be obtained from Security Token Service (STS), has three dimensions:
 * SecretId, SecretKey and Token. It will expire after a short time, hence you need to invoke STS
 * API to refresh it.
 */
public class Credential {
    private String secretId;
    private String secretKey;
    private String token;
    private Updater updater;

    public Credential() {
    }

    public Credential(String secretId, String secretKey) {
        this(secretId, secretKey, "");
    }

    public Credential(String secretId, String secretKey, String token) {
        this.secretId = secretId;
        this.secretKey = secretKey;
        this.token = token;
    }

    public Credential(String secretId, String secretKey, String token, Updater updater) {
        this.secretId = secretId;
        this.secretKey = secretKey;
        this.token = token;
        this.updater = updater;
    }

    public Updater getUpdater() {
        return updater;
    }

    public void setUpdater(Updater updater) {
        this.updater = updater;
    }

    public String getSecretId() {
        tryUpdate();
        return this.secretId;
    }

    public void setSecretId(String secretId) {
        this.secretId = secretId;
    }

    public String getSecretKey() {
        tryUpdate();
        return this.secretKey;
    }

    public void setSecretKey(String secretKey) {
        this.secretKey = secretKey;
    }

    public String getToken() {
        tryUpdate();
        return this.token;
    }

    public void setToken(String token) {
        this.token = token;
    }

    private void tryUpdate() {
        if (updater == null) {
            return;
        }

        try {
            updater.update(this);
        } catch (TencentCloudSDKException e) {
            // wrap as RuntimeException to keep API consistent
            throw new RuntimeException(e);
        }
    }

    public interface Updater {
        void update(Credential credential) throws TencentCloudSDKException;
    }
}