Package org.das2.datum

Provides classes representing physical quanties.

See:
Description

Class Summary

Basis	Model a basis vector that defines a dimension.
Datum	A Datum is a number in the context of a Unit, for example "15 microseconds.".
Datum.Double	class backing Datums with a double.
DatumRange	A DatumRange is provided as a means to carry an ordered pair of Datums representing an interval.
DatumRangeUtil
DatumRangeUtil.DateDescriptor
DatumRangeUtilOld
DatumUtil
DatumVector
EnumerationUnits	Units class for mapping arbitary objects to Datums.
LocationUnits
MonthDatumRange
NumberUnits
TimeContext
TimeLocationUnits
TimeUtil	Various time utilities
TimeUtil.TimeDigit
TimeUtil.TimeStruct
Units
UnitsConverter
UnitsConverter.Appended
UnitsConverter.ScaleOffset
UnitsUtil

Exception Summary

InconvertibleUnitsException

introduced so that clients can more precisely catch this exception.

Package org.das2.datum Description

Provides classes representing physical quanties. The Units class defines an enumeration of physical units such as Units.hertz and Units.microseconds. It also contains a convention for identifying locations in time with units like Units.t1970, the number of microseconds elapsed since midnight, January 1, 1970. The Units class also contains a registry of Units and the conversions between them.

A Datum is a number in the context of a Unit, for example "15 microseconds.". A Datum object has methods for formatting itself as a String, representing itsself as a double in the context of another Unit, and mathematical operators that allow simple calculations to be made at the physical quantities. Also a Datum's precision can be limited to improve formatting.

A DatumRange is a pair of Datums that identify a range in the physical space of a Unit. An example of a formatted DatumRange is "January, 2005" or "0 to 50Hz."

Also there are utility classes for parsing and formatting times.