content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.aliyun.oss.common.auth;
  
  /**
   * Default implementation of {@link Credentials}.
   */
  public class DefaultCredentials implements Credentials {
  
      private final String accessKeyId;
      private final String secretAccessKey;
      private final String securityToken;
  
      public DefaultCredentials(String accessKeyId, String secretAccessKey) {
          this(accessKeyId, secretAccessKey, null);
      }
  
      public DefaultCredentials(String accessKeyId, String secretAccessKey, String securityToken) {
          if (accessKeyId == null || accessKeyId.equals("")) {
              throw new InvalidCredentialsException("Access key id should not be null or empty.");
          }
          if (secretAccessKey == null || secretAccessKey.equals("")) {
              throw new InvalidCredentialsException("Secret access key should not be null or empty.");
          }
  
          this.accessKeyId = accessKeyId;
          this.secretAccessKey = secretAccessKey;
          this.securityToken = securityToken;
      }
  
      @Override
      public String getAccessKeyId() {
          return accessKeyId;
      }
  
      @Override
      public String getSecretAccessKey() {
          return secretAccessKey;
      }
  
      @Override
      public String getSecurityToken() {
          return securityToken;
      }
  
      @Override
      public boolean useSecurityToken() {
          return this.securityToken != null;
      }
  }
  