30.13.4. ユーザータイプマッピング

public interface Mapper
{
    /**
     * This method is called when CMP field is stored.
     * @param fieldValue - CMP field value
     * @return column value.
     */
    Object toColumnValue(Object fieldValue);    

    /** 
     * This method is called when CMP field is loaded.
     * @param columnValue - loaded column value.
     * @return CMP field value.
     */
    Object toFieldValue(Object columnValue);
}