StringKeyValueScheme.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
 * <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.storm.kafka;

import java.nio.ByteBuffer;
import java.util.List;

import com.google.common.collect.ImmutableMap;

import org.apache.storm.tuple.Values;

public class StringKeyValueScheme extends StringScheme implements KeyValueScheme {

  private static final long serialVersionUID = 2415900803568412571L;

  @Override
  public List<Object> deserializeKeyAndValue(byte[] key, byte[] value) {
    if (key == null) {
      return deserialize(ByteBuffer.wrap(value));
    }
    String keyString = StringScheme.deserializeString(key);
    String valueString = StringScheme.deserializeString(value);
    return new Values(ImmutableMap.of(keyString, valueString));
  }

}