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.flink;
  
  import org.apache.camel.CamelContext;
  import org.apache.flink.api.java.DataSet;
  
  import static java.lang.String.format;
  
  public abstract class ConvertingDataSetCallback<T> implements DataSetCallback<T> {
  
      private final CamelContext camelContext;
  
      private final Class<?>[] payloadTypes;
  
      protected ConvertingDataSetCallback(CamelContext camelContext, Class<?>... payloadTypes) {
          this.camelContext = camelContext;
          this.payloadTypes = payloadTypes;
      }
  
      @Override
      public T onDataSet(DataSet ds, Object... payloads) {
          if (payloads.length != payloadTypes.length) {
              String message = format("Received %d payloads, but expected %d.", payloads.length, payloadTypes.length);
              throw new IllegalArgumentException(message);
          }
          for (int i = 0; i < payloads.length; i++) {
              payloads[i] = camelContext.getTypeConverter().convertTo(payloadTypes[i], payloads[i]);
          }
          return doOnDataSet(ds, payloads);
      }
  
      public abstract T doOnDataSet(DataSet ds, Object... payloads);
  }
  