package com.github.mygreen.supercsv.cellprocessor.conversion;
   
   import java.util.Optional;
   
   import org.supercsv.cellprocessor.ift.CellProcessor;
   import org.supercsv.cellprocessor.ift.StringCellProcessor;
   
   import com.github.mygreen.supercsv.annotation.conversion.CsvHalfChar;
   import com.github.mygreen.supercsv.builder.Configuration;
  import com.github.mygreen.supercsv.builder.FieldAccessor;
  import com.github.mygreen.supercsv.cellprocessor.ConversionProcessorFactory;
  import com.github.mygreen.supercsv.cellprocessor.format.TextFormatter;
  
  /**
   * アノテーション{@link CsvHalfChar}をハンドリングして、CellProcessorの{@link HalfChar}を作成する。
   * 
   * @since 2.0
   * @author T.TSUCHIE
   *
   */
  public class HalfCharFactory implements ConversionProcessorFactory<CsvHalfChar> {
      
      @Override
      public Optional<CellProcessor> create(final CsvHalfChar anno, final Optional<CellProcessor> next,
              final FieldAccessor field, final TextFormatter<?> formatter, final Configuration config) {
          
          final CharCategory[] categories;
          if(anno.categories().length == 0) {
              categories = CharCategory.values();
          } else {
              categories = anno.categories();
          }
          
          final HalfCharnversion/HalfChar.html#HalfChar">HalfChar processor = next.map(n -> new HalfChar(categories, (StringCellProcessor) n))
                  .orElseGet(() -> new HalfChar(categories));
          
          return Optional.of(processor);
      }
      
  }