/*
 * 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.auth2;

import org.apache.arrow.flight.CallHeaders;
import org.apache.arrow.flight.grpc.CredentialCallOption;

/**
 * A client header handler that parses the incoming headers for a bearer token.
 */
public class ClientBearerHeaderHandler implements ClientHeaderHandler {

  @Override
  public CredentialCallOption getCredentialCallOptionFromIncomingHeaders(CallHeaders incomingHeaders) {
    final String bearerValue = AuthUtilities.getValueFromAuthHeader(incomingHeaders, Auth2Constants.BEARER_PREFIX);
    if (bearerValue != null) {
      return new CredentialCallOption(new BearerCredentialWriter(bearerValue));
    }
    return null;
  }
}
