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.calcite.avatica.remote;
  
  import org.apache.calcite.avatica.util.SecurityUtils;
  
  import java.util.Objects;
  import java.util.concurrent.Callable;
  
  /**
   * HTTP client implementation which invokes the wrapped HTTP client in a doAs with the provided
   * Subject.
   */
  public class DoAsAvaticaHttpClient implements AvaticaHttpClient {
    private final AvaticaHttpClient wrapped;
    private final KerberosConnection kerberosUtil;
  
    public DoAsAvaticaHttpClient(AvaticaHttpClient wrapped, KerberosConnection kerberosUtil) {
      this.wrapped = Objects.requireNonNull(wrapped);
      this.kerberosUtil = Objects.requireNonNull(kerberosUtil);
    }
  
    @Override
    public byte[] send(final byte[] request) {
      return SecurityUtils.callAs(kerberosUtil.getSubject(), new Callable<byte[]>() {
        @Override public byte[] call() {
          return wrapped.send(request);
        }
      });
    }
  }
  
  // End DoAsAvaticaHttpClient.java
  