KeyValueSchemeAsMultiScheme.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.util.Arrays;
import java.util.List;

import org.apache.storm.spout.SchemeAsMultiScheme;

public class KeyValueSchemeAsMultiScheme extends SchemeAsMultiScheme {

  private static final long serialVersionUID = -183992486739209149L;

  public KeyValueSchemeAsMultiScheme(KeyValueScheme scheme) {
    super(scheme);
  }

  public Iterable<List<Object>> deserializeKeyAndValue(final byte[] key, final byte[] value) {
    List<Object> o = ((KeyValueScheme) scheme).deserializeKeyAndValue(key, value);
    if (o == null) {
      return null;
    } else {
      return Arrays.asList(o);
    }
  }

}