cplex-scala-1.7.0

Here are the main changes this release:

• Port to CPLEX 12.10 and Scala 2.13
• Port to Gradle 5.6.2
• Method getObjectiveValue is now obsolete and replaced by method getObjValue
• Add API for the CPLEX annotations, see methods newLongAnnotation, setAnnotation, getAnnotation...
• Add example Benders that applies a Benders decomposition using the CPLEX annotations
• Add functional programming API for piecewise linear functions.
• Add example SailcoPW that uses of a piecewise linear function to create the objective.
• Add example Transport.scala
• Add optional parameter when creating a set of variables to specify a default value
• Add API for MIP start, read and write solutions to file
• Add API to redirect CPLEX info, warnings and errors to output stream
• Add API for CPLEX aborter
• Add API to get the MIP relative gap
• Add functional programming API for MIP information callbacks

cplex-scala-1.6.0

Here are the changes in this release:

• Add API for KPIs in class CpModel: see example PlantLocation.scala
• Add methods quot in class CpModel for division and define operators '/' in class NumExpr
• Move methods add from CpModel and MpModel to class Modeler
• Add methods remove in class Modeler to remove object(s) from the optimization model
• Add method square in class Modeler for quadratic programming.
• Add methods to get the reduced cost(s), the dual(s) and the slack(s)
• Add an first example of quadratic programming problem, see example IndefQPex1.scala

cplex-scala-1.5.2

This is a hotfix:

• Update Gradle file build.gradle: set default values for environment variables for the Nexus.

The library is the same as in release 1.5.0.

cplex-scala-1.5.1

This is a hotfix:

• Fix error in release notes for release 1.5.0
• Upate file Jenkinsfile for continuous build

The library is the same as in release 1.5.0.

cplex-scala-1.5.0

• Update Gradle wrapper to release 5.4
• Add API for multi-objective in MpModel: see example DietMultiObj.scala
• Define method apply in classes NumArray, IntArray and IntExprArray for element constraint: this allows to write constructs like cost = costs(supplier) where costs is an array of integer, supplier is an integer variable and cost is an integer expression that represents the cost of the supplier. See Facility.scala for a complete example.
• Add operator * on classes NumArray, IntArray, NumVarArray and IntExprArrayfor scalar product.
• Refactoring:
  • Add class Modeler to build optimization model: CpModel and MpModel now inherits from Modeler
  • Move many classes such as NumExpr, IntExpr, NumVar, IntVar, Objective from package com.decisoinbrain.cplex.mp and com.decisionbrain.cplex.cp to com.decisionbrain.cplex.
  • These entities are now shared and can be used to build either a mathematical programming model or a constraint
    programming model.
• Update file build.gradle: replace dependency with oplall.jar by dependencies with cplex.jar and
  ILOG.CP.jar instead.

cplex-scala-1.4.0

README

• Port to IBM CPLEX 12.9
• Port to Scala 2.12.8

Constraint Programming

• Add two new examples LearningCurve.scala and LearningCurve2.scala a scheduling problem on two alternative heterogeneous machines with sequence dependent setup times, forbidden transitions and a learning curve when changing of type. The second example is a variation where the learning curve depends not only on the current type and the previous type but also on the machine.
• Fix bugs with the parameters timeLimit and solutionLimit of method solve of CpModel.

cplex-scala-1.3.0

README

• Port to IBM CPLEX 12.8
• Port to Scala 2.12.6

Constraint Programming

• Add iterators on cumul function expression, state function, step function and piecewise linear function.
• Add type IntSet, factory methods and iterator
• Add API for inverse constraint and add example Talent.scala
• Add new signature for alternative constraint with only two parameters
• Add API on interval sequence variable: add methods getFirst, getLast, getNext and getPrev
• Add class for IntervalSequenceVar that implements trait Iterable
• Add example SchedState.scala : a scheduling problem on two alternative heterogeneous machines with sequence dependent setup times and forbidden transisions

cplex-scala v1.2.0

README

• Add a link to IBM ILOG CPLEX Studio Community Edition download page in the README

Constraint Programming

• Add state function
• Add constraints alwaysIn, alwaysEqual, alwaysConstant and alwaysNoState on state functions
• Add example SchedState.scala
• Add missing precedence constraints in companion object of CpModel
• Add constraints alwaysEqual on cumul functions
• Add integer division on integer expression

cplex-scala v1.1.0

README

• Use syntax highlighting for scala code blocks
• Update README: specify version of Java JDK used for testing

Constraint Programming:

• Add constraint forbidStart, forbidEnd, forbidExtent
• Replace type NumToNumStepFunction with a class, define operators (+=, -=, *=, +, -...) and a proper toString method that prints the step function in a human readable format.
• Add example SchedCalendar.

cplex-scala v1.0.1

Update README.md with new equation and support to IBM ILOG CPLEX 12.7. Update build.gradle to optionally configure maven repository.