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.driver.jdbc.authentication;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Properties;
  import org.apache.arrow.driver.jdbc.utils.ArrowFlightConnectionConfigImpl;
  import org.apache.arrow.flight.CallHeaders;
  import org.apache.arrow.flight.CallStatus;
  import org.apache.arrow.flight.auth2.CallHeaderAuthenticator;
  
  public class TokenAuthentication implements Authentication {
    private final List<String> validCredentials;
  
    public TokenAuthentication(List<String> validCredentials) {
      this.validCredentials = validCredentials;
    }
  
    @Override
    public CallHeaderAuthenticator authenticate() {
      return new CallHeaderAuthenticator() {
        @Override
        public AuthResult authenticate(CallHeaders incomingHeaders) {
          String authorization = incomingHeaders.get("authorization");
          if (!validCredentials.contains(authorization)) {
            throw CallStatus.UNAUTHENTICATED
                .withDescription("Invalid credentials.")
                .toRuntimeException();
          }
          return new AuthResult() {
            @Override
            public String getPeerIdentity() {
              return authorization;
            }
          };
        }
      };
    }
  
    @Override
    public void populateProperties(Properties properties) {
      this.validCredentials.forEach(
          value ->
              properties.put(
                  ArrowFlightConnectionConfigImpl.ArrowFlightConnectionProperty.TOKEN.camelName(),
                  value));
    }
  
    public static final class Builder {
      private final List<String> tokenList = new ArrayList<>();
  
      public TokenAuthentication.Builder token(String token) {
        tokenList.add("Bearer " + token);
        return this;
      }
  
      public TokenAuthentication build() {
        return new TokenAuthentication(tokenList);
      }
    }
  }
  