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
   *
   *     https://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.avro.ipc.reflect;
  
  import java.io.IOException;
  import java.lang.reflect.Proxy;
  
  import org.apache.avro.Protocol;
  import org.apache.avro.Schema;
  import org.apache.avro.io.DatumReader;
  import org.apache.avro.io.DatumWriter;
  import org.apache.avro.reflect.ReflectData;
  import org.apache.avro.reflect.ReflectDatumReader;
  import org.apache.avro.reflect.ReflectDatumWriter;
  import org.apache.avro.ipc.Transceiver;
  import org.apache.avro.ipc.specific.SpecificRequestor;
  
  /** A {@link org.apache.avro.ipc.Requestor} for existing interfaces. */
  public class ReflectRequestor extends SpecificRequestor {
  
    public ReflectRequestor(Class<?> iface, Transceiver transceiver) throws IOException {
      this(iface, transceiver, new ReflectData(iface.getClassLoader()));
    }
  
    protected ReflectRequestor(Protocol protocol, Transceiver transceiver) throws IOException {
      this(protocol, transceiver, ReflectData.get());
    }
  
    public ReflectRequestor(Class<?> iface, Transceiver transceiver, ReflectData data) throws IOException {
      this(data.getProtocol(iface), transceiver, data);
    }
  
    public ReflectRequestor(Protocol protocol, Transceiver transceiver, ReflectData data) throws IOException {
      super(protocol, transceiver, data);
    }
  
    public ReflectData getReflectData() {
      return (ReflectData) getSpecificData();
    }
  
    @Override
    protected DatumWriter<Object> getDatumWriter(Schema schema) {
      return new ReflectDatumWriter<>(schema, getReflectData());
    }
  
    @Override
    protected DatumReader<Object> getDatumReader(Schema writer, Schema reader) {
      return new ReflectDatumReader<>(writer, reader, getReflectData());
    }
  
    /** Create a proxy instance whose methods invoke RPCs. */
    public static <T> T getClient(Class<T> iface, Transceiver transceiver) throws IOException {
      return getClient(iface, transceiver, new ReflectData(iface.getClassLoader()));
    }
  
    /** Create a proxy instance whose methods invoke RPCs. */
    @SuppressWarnings("unchecked")
    public static <T> T getClient(Class<T> iface, Transceiver transceiver, ReflectData reflectData) throws IOException {
      Protocol protocol = reflectData.getProtocol(iface);
      return (T) Proxy.newProxyInstance(reflectData.getClassLoader(), new Class[] { iface },
          new ReflectRequestor(protocol, transceiver, reflectData));
    }
  
    /** Create a proxy instance whose methods invoke RPCs. */
    @SuppressWarnings("unchecked")
    public static <T> T getClient(Class<T> iface, ReflectRequestor rreq) throws IOException {
      return (T) Proxy.newProxyInstance(rreq.getReflectData().getClassLoader(), new Class[] { iface }, rreq);
    }
  }
  