djunits v6.0.0

Version 6.0.0 is a complete re-implementation of djunits, and it requires changes in the code that use it. The most notable changes with respect to djunits version 5 are:

• Quantities are central, and units are ways of displaying or entering quantity values.
• Units are now an inner class of their respective quantities, so, Length.Unit rather than LengthUnit.
• Naming of units is done using the abbreviation rather than the name, so Speed.Unit.km_h instead of Speed.Unit.KILOMETER_PER_HOUR.
• naming of units also follows common upper/lower case conventions: Energy.Unit.kJ and Length.Unit.km.
• The DimensionlessUnit unit class has been renamed to Unitless.
• Absolute quantities have been re-implemented using a Reference for the reference point.
• Function names have changes and made consistent across djunits, e.g., multiply, divide, add, substract, scaleBy, divideBy.
• The flexible classes SIQuantity and SIUnit behave like any other quantity and unit.
• Vectors and matrices have an implementation using generics such as Matrix3x3<Area>, and only allow correct operations.
• Vectors and matrices have Hadamard operations and algebraic vector/matrix operations.
• Efficient vector and matrix classes have been generated for sizes 1 to 3.
• A QuantityTable class has been added for storing quantities without allowing algebraic operations.
• Localization has been implemented from the start rather than as an afterthought.
• All quantities, vectors, matrices and quantity tables have an absolute variant that starts with Abs.
• Vectors have a Row and Col subclass for row and column vectors; e.g. VectorN.Row and VectorN.Col.

The following issues have been addressed:

• #5. Remove display unit storage in class and resource bundle
• #50. Simplification
• #51. Turn Scalar into Quantity
• #52. Remove FloatScalar classes from djunits
• #53. Create one storage class for double and float vectors and matrices
• #55. Store base unit information with quantity
• #56. Make resource bundles deal with overrides only
• #58. See if the unit can have a method to instantiate a quantity
• #59. Remove functions that do not directly make sense for scalars
• #60. Class Format: %g conversion
• #61. Class Format: Locale use
• #62. Create setDisplayUnit(string) method for Quantity
• #63. Change names of some 'Electrical' quantity classes
• #64. LinearDensity class has the wrong units
• #65. Reconsider the use of the term Vector and Matrix in djunits
• #67. Create fine-grained interfaces for operations on djunts elements
• #68. Implement method chaining for setDisplayValue
• #69. Tolerance for matrix operations should be specified as a quantity
• #70. Units of matrix operations should be specified correctly in the interface
• #71. Use Unitless instead of Dimensionless.Unit
• #72. See if the quantities can be further simplified
• #73. Create a proper as method
• #74. Reconsider implementation of Absolute vs Relative
• #75. Rename Vector and Matrix classes for clarity and consistency
• #76. Absolute quantity vectors, matrices and tables
• #77. Remove fractional SI dimensions for now
• #79. Write new documentation for version 6
• #80. Write new unit tests for djunits
• #81. Replace exceptions with standard ones where possible
• #82. Units class should load units only when used
• #83. Consider constants for units
• #84. Include style guide for naming of units and constants in the manual
• #85. Include use of 'natural' units in user code in documentation
• #86. Re-create add and subtract functions for absolute quantities
• #87. Implement convenience constructors in DataGrid
• #88. Implement convenience constructors for Vector and Matrix
• #89. Extend contract for vectors
• #90. Make an inbetween Matrix class for DataGrid matrices
• #91. Change Vector and Matrix constructors w.r.t. displayUnit
• #92. Include missing code in Matrix class
• #93. The DataGrid class needs an instantiate method with rows and cols
• #94. Remove </p> from javadoc
• #95. Create Vector and matrix methods for multiplication with scalar
• #96. Create as(targetUnit) method for VectorN
• #97. Create equals() methods for different DataGrid types
• #98. Add formatter for vectors and matrices
• #99. Clean up interface hierarchy for Vector and Matrix
• #100. Add isDense, isSparse, isDouble, isFloat methods to DataGridSi
• #101. Separate 1-based from 0-based operations on vector and matrix classes
• #102. Write test code for Matrix1x1 and Vector1
• #103. Write test code for Vector methods getRowScalars, getRowSi, getRowVector + column
• #104. Rethink printing of absolute quantities
• #105. Rethink method names for Scale interface
• #106. Consider 'entry' instead of 'element' in method names for Hadamard operations
• #107. Add transpose() method to Matrix
• #108. Add getSiGrid() method to VectorMatrix
• #109. Add nnz() or nonZeroCount()methods to all vectors and matrices
• #110. Rename cardinality() in DataGridSi to nonZeroCount()
• #111. Rename Matrix.determinantScalar method to determinantSi
• #116. Remove mode operation for vector, matrix and quantity table
• #117. Update technical documentation main page (apt file).
• #118. Update link to surefire report in technical documentation (error 404)
• #125. Update Quantity documentation page to describe operations
• #127. Research whether generic U can be removed as much as possible
• #128. See if UnitInterface can be renamed to Unit
• #129. See if U parameter can also be removed from AbsoluteQuantity
• #130. Allow si field again instead of si() method
• #131. Change name of si() method in vectors and matrices
• #132. Check if AbsoluteQuantity should extend Number
• #133. Create method that can instantiate a generic AbsoluteQuantity
• #134. Change generics to include transpose return type
• #135. Change inheritance for Vector
• #136. Move getRowXXX, getColumnXXX methods to new class Table
• #137. Rename AbsoluteQuantity to AbsQuantity
• #138. Create of() and ofSi() methods for vectors, matrices, tables
• #139. Make a Reference interface to avoid AbstractReference
• #140. Add documentation for absolute vectors, matrices and tables
• #141. Add documentation for of() and ofSi() methods
• #142. Change constructors of Vector and Matrix to SI values
• #143. Add as() methods for AbsVector
• #144. Add as() methods for AbsMatrix
• #145. add as() methods for AbsQuantityTable
• #146. Add method to subtract AbsQuantity from AbsVector and AbsMatrix
• #147. Add of(A[]), of(A, A) methods to AbsVector classes
• #148. Add of(A[]), of(A[][]) methods to create AbsMatrix
• #149. Add of(A[]), of(A[][]) methods to create AbsQuantityTable
• #150. Create full test coverage of relative as() functions
• #151. Rename Quantity method instantiate(si) to instantiateSi(si)
• #152. Rationalize toString() methods of Quantity
• #153. Allow setterCanReturnItsClass in checkstyle
• #155. Change toString(...) methods to format(...) in SIUnit class