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 org.apache.arrow.flight.auth;
  
  import java.util.Iterator;
  import org.apache.arrow.flight.impl.Flight.BasicAuth;
  
  /** A client auth handler that supports username and password. */
  public class BasicClientAuthHandler implements ClientAuthHandler {
  
    private final String name;
    private final String password;
    private byte[] token = null;
  
    public BasicClientAuthHandler(String name, String password) {
      this.name = name;
      this.password = password;
    }
  
    @Override
    public void authenticate(ClientAuthSender outgoing, Iterator<byte[]> incoming) {
      BasicAuth.Builder builder = BasicAuth.newBuilder();
      if (name != null) {
        builder.setUsername(name);
      }
  
      if (password != null) {
        builder.setPassword(password);
      }
  
      outgoing.send(builder.build().toByteArray());
      this.token = incoming.next();
    }
  
    @Override
    public byte[] getCallToken() {
      return token;
    }
  }
  