lang/java/ipc/src/main/java/org/apache/avro/ipc/reflect/ReflectResponder.java

/**
 * 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.avro.ipc.reflect;

import java.io.IOException;

import org.apache.avro.Schema;
import org.apache.avro.Protocol;
import org.apache.avro.io.Encoder;
import org.apache.avro.io.DatumReader;
import org.apache.avro.io.DatumWriter;
import org.apache.avro.ipc.specific.SpecificResponder;
import org.apache.avro.reflect.ReflectData;
import org.apache.avro.reflect.ReflectDatumReader;
import org.apache.avro.reflect.ReflectDatumWriter;

/** {@link org.apache.avro.ipc.Responder} for existing interfaces.*/
public class ReflectResponder extends SpecificResponder {
  public ReflectResponder(Class iface, Object impl) {
    this(iface, impl, new ReflectData(impl.getClass().getClassLoader()));
  }

  public ReflectResponder(Protocol protocol, Object impl) {
    this(protocol, impl, new ReflectData(impl.getClass().getClassLoader()));
  }

  public ReflectResponder(Class iface, Object impl, ReflectData data) {
    this(data.getProtocol(iface), impl, data);
  }

  public ReflectResponder(Protocol protocol, Object impl, ReflectData data) {
    super(protocol, impl, data);
  }

  public ReflectData getReflectData() { return (ReflectData)getSpecificData(); }

  @Override
  protected DatumWriter<Object> getDatumWriter(Schema schema) {
    return new ReflectDatumWriter<Object>(schema, getReflectData());
  }

  @Override
  protected DatumReader<Object> getDatumReader(Schema actual, Schema expected) {
    return new ReflectDatumReader<Object>(actual, expected, getReflectData());
  }

  @Override
  public void writeError(Schema schema, Object error,
                         Encoder out) throws IOException {
    if (error instanceof CharSequence)
      error = error.toString();                   // system error: convert
    super.writeError(schema, error, out);
  }



}