org.seasar.doma.converter
インタフェース 
Converter
クラス 
BigDecimalConverter
BigIntegerConverter
BooleanConverter
ByteConverter
ConversionSupport
Converters
DateConverter
DoubleConverter
FloatConverter
IntegerConverter
LongConverter
ShortConverter
StringConverter
TimeConverter
TimestampConverter
UtilDateConverter
例外 
ConversionException
FormatConversionException
ParseConversionException
UnsupportedConversionException