content: /*
   * 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.camel.component.kafka.serde;
  
  import java.math.BigInteger;
  
  import org.apache.camel.Exchange;
  import org.apache.camel.support.ExpressionAdapter;
  import org.apache.camel.support.builder.ValueBuilder;
  
  public final class KafkaSerdeHelper {
  
      private KafkaSerdeHelper() {
      }
  
      public static ValueBuilder numericHeader(String name) {
          return new ValueBuilder(new ExpressionAdapter() {
              @Override
              public Object evaluate(Exchange exchange) {
                  byte[] id = exchange.getIn().getHeader(name, byte[].class);
                  BigInteger bi = new BigInteger(id);
                  return String.valueOf(bi.longValue());
              }
          });
      }
  }
  