/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.crunch.kafka.utils;

import org.I0Itec.zkclient.exception.ZkMarshallingError;
import org.I0Itec.zkclient.serialize.ZkSerializer;

import java.nio.charset.Charset;

/**
 * A {@link ZkSerializer Zookeeper serializer} for {@link String} objects.
 * <p>
 * Ported from the {@code kafka.utils.ZKStringSerializer} scala object.
 * </p>
 */
public class ZkStringSerializer implements ZkSerializer {

  private static final Charset UTF_8 = Charset.forName("UTF-8");

  @Override
  public byte[] serialize(Object data) throws ZkMarshallingError {
    return ((String) data).getBytes(UTF_8);
  }

  @Override
  public Object deserialize(byte[] bytes) throws ZkMarshallingError {
    return bytes != null ? new String(bytes, UTF_8) : null;
  }
}