code: @Override
  	public String doTransformSql(final SqlContext sqlContext, final String sql) {
  		if (getFilters().isEmpty()) {
  			return sql;
  		}
  		String newSql = sql;
  		for (final SqlFilter filter : getFilters()) {
  			newSql = filter.doTransformSql(sqlContext, newSql);
  		}
  		return newSql;
  	}
docs: {@inheritDoc}
  
  @see jp.co.future.uroborosql.filter.SqlFilter#doTransformSql(jp.co.future.uroborosql.context.SqlContext, java.lang.String)