HashEncoder.java

/**
 * Copyright 2013-2014 Recruit Technologies Co., Ltd. and contributors
 * (see CONTRIBUTORS.md)
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.  A copy of the
 * License is distributed with this work in the LICENSE.md file.  You may
 * also obtain a copy of the License from
 *
 *     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.gennai.gungnir.utils.kafka;

import java.nio.ByteBuffer;

import kafka.serializer.Encoder;
import kafka.utils.VerifiableProperties;

public class HashEncoder implements Encoder<Integer> {

  private ByteBuffer byteBuffer = ByteBuffer.allocate(4);

  public HashEncoder(VerifiableProperties props) {
  }

  @Override
  public byte[] toBytes(Integer index) {
    byte[] bytes = new byte[4];
    byteBuffer.putInt(index);
    byteBuffer.clear();
    byteBuffer.get(bytes);
    byteBuffer.clear();
    return bytes;
  }
}