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   *  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
   *
   *    https://www.apache.org/licenses/LICENSE-2.0
   *
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  package org.apache.cayenne.access;
  
  import org.apache.cayenne.ResultIterator;
  
  import java.util.Iterator;
  import java.util.List;
  import java.util.Objects;
  
  class ResultIteratorConverterDecorator<T, R> implements ResultIterator<R> {
      private final ResultIterator<T> iterator;
      private final DataDomainQueryAction.ObjectConversionStrategy<T, R> converter;
  
      ResultIteratorConverterDecorator(ResultIterator<T> iterator, DataDomainQueryAction.ObjectConversionStrategy<T, R> converter) {
          this.iterator = Objects.requireNonNull(iterator);
          this.converter = Objects.requireNonNull(converter);
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public List<R> allRows() {
          List<T> mainRows = iterator.allRows();
          converter.convert(mainRows);
          return (List<R>) mainRows;
      }
  
      @Override
      public boolean hasNextRow() {
          return iterator.hasNextRow();
      }
  
      @Override
      public R nextRow() {
          return converter.convert(iterator.nextRow());
      }
  
      @Override
      public void skipRow() {
          iterator.skipRow();
      }
  
      @Override
      public void close() {
          iterator.close();
      }
  
      @Override
      public Iterator<R> iterator() {
          return new Iterator<>() {
              @Override
              public boolean hasNext() {
                  return iterator.hasNextRow();
              }
  
              @Override
              public R next() {
                  return converter.convert(iterator.nextRow());
              }
          };
      }
  }
  