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.odps.table.enviroment;
  
  import com.aliyun.odps.account.Account;
  import com.aliyun.odps.account.AppAccount;
  import com.aliyun.odps.account.AppStsAccount;
  import com.aliyun.odps.table.utils.Preconditions;
  
  import java.io.Serializable;
  import java.util.Optional;
  
  /**
   * ODPS credentials for table read/write
   */
  public class Credentials {
  
      private Account account;
      private AppAccount appAccount;
      private AppStsAccount appStsAccount;
  
      public Account getAccount() {
          return account;
      }
  
      public Optional<AppAccount> getAppAccount() {
          return Optional.ofNullable(appAccount);
      }
  
      public Optional<AppStsAccount> getAppStsAccount() {
          return Optional.ofNullable(appStsAccount);
      }
  
      public static Builder newBuilder() {
          return new Builder();
      }
  
      public static class Builder {
  
          private final Credentials credentials;
  
          public Builder() {
              this.credentials = new Credentials();
          }
  
          public Builder withAccount(Account account) {
              this.credentials.account = account;
              return this;
          }
  
          public Builder withAppAccount(AppAccount appAccount) {
              this.credentials.appAccount = appAccount;
              return this;
          }
  
          public Builder withAppStsAccount(AppStsAccount appStsAccount) {
              this.credentials.appStsAccount = appStsAccount;
              return this;
          }
  
          public Credentials build() {
              Preconditions.checkNotNull(this.credentials.getAccount(), "Odps account cannot be null");
              return this.credentials;
          }
      }
  
  }
  