package com.github.mygreen.supercsv.cellprocessor.conversion;
   
   import org.supercsv.cellprocessor.CellProcessorAdaptor;
   import org.supercsv.cellprocessor.ift.StringCellProcessor;
   import org.supercsv.util.CsvContext;
   
   /**
    * 一致する語彙を置換するCellProcessor。
    * 
   * @since 2.0
   * @author T.TSUCHIE
   *
   */
  public class WordReplace extends CellProcessorAdaptor implements StringCellProcessor {
      
      private final CharReplacer replacer;
      
      public WordReplace(final CharReplacer replacer) {
          super();
          checkPreconditions(replacer);
          this.replacer = replacer;
      }
      
      public WordReplace(final CharReplacer replacer, final StringCellProcessor next) {
          super(next);
          checkPreconditions(replacer);
          this.replacer = replacer;
      }
      
      private static void checkPreconditions(final CharReplacer replacer) {
          if(replacer == null) {
              throw new NullPointerException("replacer should not be null.");
          }
      }
      
      @Override
      public <T> T execute(final Object value, final CsvContext context) {
          
          if(value == null) {
              return next.execute(value, context);
          }
          
          final String result = replacer.replace(value.toString());
          return next.execute(result, context);
      }
      
  }