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.generic;
  
  import java.io.IOException;
  
  import org.apache.avro.AvroRemoteException;
  import org.apache.avro.Protocol;
  import org.apache.avro.Schema;
  import org.apache.avro.generic.GenericData;
  import org.apache.avro.generic.GenericDatumReader;
  import org.apache.avro.generic.GenericDatumWriter;
  import org.apache.avro.io.Decoder;
  import org.apache.avro.io.Encoder;
  import org.apache.avro.io.DatumReader;
  import org.apache.avro.io.DatumWriter;
  import org.apache.avro.ipc.Responder;
  
  /** {@link Responder} implementation for generic Java data. */
  public abstract class GenericResponder extends Responder {
    private GenericData data;
  
    public GenericResponder(Protocol local) {
      this(local, GenericData.get());
  
    }
  
    public GenericResponder(Protocol local, GenericData data) {
      super(local);
      this.data = data;
    }
  
    public GenericData getGenericData() {
      return data;
    }
  
    protected DatumWriter<Object> getDatumWriter(Schema schema) {
      return new GenericDatumWriter<>(schema, data);
    }
  
    protected DatumReader<Object> getDatumReader(Schema actual, Schema expected) {
      return new GenericDatumReader<>(actual, expected, data);
    }
  
    @Override
    public Object readRequest(Schema actual, Schema expected, Decoder in) throws IOException {
      return getDatumReader(actual, expected).read(null, in);
    }
  
    @Override
    public void writeResponse(Schema schema, Object response, Encoder out) throws IOException {
      getDatumWriter(schema).write(response, out);
    }
  
    @Override
    public void writeError(Schema schema, Object error, Encoder out) throws IOException {
      if (error instanceof AvroRemoteException)
        error = ((AvroRemoteException) error).getValue();
      getDatumWriter(schema).write(error, out);
    }
  
  }
  