Package fr.gael.drb.value

Envelope classes and operations for primitive values of DRB.

See:
Description

Interface Summary

Arithmetic	Arithmetic expression evaluation.
Comparison	Generic comparison operator.
Logic	Generic logical operator.
Numeric	Standard numeric values : from boolean to double.
NumericArray	Numeric array value wrapper.
Sumable	Sumable expression evaluation.
Value	Generic value wrapper for multiple purposes.
ValueArray	Generic array value wrapper.
ValueFormat	Interface to format the value.

Class Summary

AbstractNumericArray	Generic numeric array wrapper.
AbstractValueArray	Generic array value wrapper.
Binary	The Binary class is a generic wrapper for binary values.
BinaryInteger	The BinaryInteger class is a generic wrapper for binary integer values.
Boolean	The Boolean class is a generic wrapper for boolean values.
BooleanArray	The BooleanArray class is a generic wrapper for boolean array values.
Byte	The Byte class is a generic wrapper for byte values.
ByteArray	The ByteArray class is a generic wrapper for byte array values.
DateTime	The DateTime class is a generic wrapper for Date values.
DayTimeDuration	The DayTimeDuration class is a generic wrapper for day/time duration.
Decimal	The Decimal class is a generic wrapper for decimal values.
DefaultValueArray	Generic array value wrapper.
Double	The Double class is a generic wrapper for double values.
DoubleArray	The DoubleArray class is a generic wrapper for double array values.
Duration	The DateTime class is a generic wrapper for Date values.
Float	The Float class is a generic wrapper for float values.
FloatArray	The FloatArray class is a generic wrapper for float array values.
Int	The Int class is a generic wrapper for int values.
IntArray	The IntArray class is a generic wrapper for int array values.
Integer	The Integer class is a generic wrapper for decimal values.
Long	The Long class is a generic wrapper for long values.
LongArray	The LongArray class is a generic wrapper for long array values.
Short	The Short class is a generic wrapper for short values.
ShortArray	The ShortArray class is a generic wrapper for short array values.
String	The String class is a generic wrapper for string values.
UnsignedByte	The UnsignedByte class is a generic wrapper for unsigned byte values.
UnsignedByteArray	The UnsignedByteArray class is a generic wrapper for unsigned byte array values.
UnsignedInt	The UnsignedInt class is a wrapper for unsigned integer values.
UnsignedIntArray	The UnsignedIntegerArray class is a generic wrapper for unsigned int array values.
UnsignedLong	The UnsignedLong class is a generic wrapper for unsigned long values.
UnsignedLongArray	The UnsignedLongArray class is a generic wrapper for unsigned long array values.
UnsignedShort	The UnsignedShort class is a generic wrapper for unsigned short values.
UnsignedShortArray	The UnsignedShortArray class is a generic wrapper for unsigned short array values.
YearMonthDuration	The YearMonthDuration class is a generic wrapper for year/month duration.

Package fr.gael.drb.value Description

Envelope classes and operations for primitive values of DRB.

DRB API® relies also on a unified value type model to represent the atomic value which is physically extracted from the data sources. Indeed, values coming from different files are usually formatted in different ways. They must be converted into a unique format to be able to be processed all together. The implementations shall return a value encoded according to a pre-defined format.

The fr.gael.drb.value package contains several interfaces defining how operation, assignment and converting are implemented. DRB API® relies on Java primitive data type standard and a subset of XML Schema data types. The Value, ValueArray, Numeric, NumericArray and DateTime interfaces define how value are typed. The Arithmetic, Logic and Comparison interfaces defines how operations are organised. The fr.gael.drb.value package contains a unified set of value classes. These classes wrap classes provided inherently by Java primitive data type and add methods specific to DRB API®. Indeed, the Java primitive data type may not be used as they are. They are mainly employed for querying evaluation: dynamic coercion may be applied while converting to comply with output type requirement. Actually, there is no need to know the real type embedded in the value. Note that each data type has a identifier which is defined in the Value interface.

The supported Value types:

Value Type	Array	Unsigned
BinaryInteger	No	No
Boolean	Yes	N/A
Byte	Yes	Yes
DateTime	No	N/A
Double	Yes	N/A
Float	Yes	N/A
Integer	Yes	Yes
Long	Yes	Yes
Short	Yes	Yes
String	No	N/A