jalinopt

Class LP

java.lang.Object

jalinopt.LP

public class LP
extends java.lang.Object

Defines what a linear problem (linear model) is.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LP.OptimizationType

Constructor Summary

Constructors

Constructor and Description
LP() Creates a new empty LP

Method Summary

Modifier and Type	Method and Description
Constraint	addConstraint()
Constraint	addConstraint(java.lang.String operator, double rightOperand) Adds a contrainst to this problem.
void	addVariable(Variable v)
static LP	createExample() Creates an example LP.
java.util.List<Constraint>	getConstraints() Retrieves the list of contrainsts applying to this LP.
LinearExpression	getObjective() Retrieves the objective of this LP
LP.OptimizationType	getOptimizationType() Retrieves the type of optimization for this LP, min or max.
Variable	getVariableByName(long variableNumber) Looks up a variable by its name.
Variable	getVariableByName(java.lang.String variableName)
java.util.Collection<Variable>	getVariables() Retrieves the set of variables implied in this LP.
static LP	parseCplex(java.lang.String cplexText)
void	setOptimizationType(LP.OptimizationType optimizationType) Sets the type of optimization
Result	solve() This this LP using the default solver.
Result	solve(LPSolver solver) Solves this problem using the given solver.
java.lang.String	toCanonicalForm()
java.lang.String	toCplex() Computes a CPLEX PL text representing this LP.
java.lang.String	toLpSolve() Computes a CPLEX PL text representing this LP.
java.lang.String	toString()
static int	var2i(Variable v)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LP

public LP()

Creates a new empty LP

Method Detail

getObjective

public LinearExpression getObjective()

Retrieves the objective of this LP

Returns:

a linear expression

setOptimizationType

public void setOptimizationType(LP.OptimizationType optimizationType)

Sets the type of optimization

getVariables

public java.util.Collection<Variable> getVariables()

Retrieves the set of variables implied in this LP.

getVariableByName

public Variable getVariableByName(long variableNumber)

Looks up a variable by its name.

Parameters:

variableNumber - the name of a variable implied in this LP

Returns:

the variable, or null if it could not be found

getVariableByName

public Variable getVariableByName(java.lang.String variableName)

getOptimizationType

public LP.OptimizationType getOptimizationType()

Retrieves the type of optimization for this LP, min or max.

getConstraints

public java.util.List<Constraint> getConstraints()

Retrieves the list of contrainsts applying to this LP.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

toCplex

public java.lang.String toCplex()

Computes a CPLEX PL text representing this LP.

toLpSolve

public java.lang.String toLpSolve()

Computes a CPLEX PL text representing this LP.

addConstraint

public Constraint addConstraint()

solve

public Result solve()

This this LP using the default solver.

solve

public Result solve(LPSolver solver)

Solves this problem using the given solver.

addConstraint

public Constraint addConstraint(java.lang.String operator,
                                double rightOperand)

Adds a contrainst to this problem.

toCanonicalForm

public java.lang.String toCanonicalForm()

createExample

public static LP createExample()

Creates an example LP.

var2i

public static int var2i(Variable v)

parseCplex

public static LP parseCplex(java.lang.String cplexText)

addVariable

public void addVariable(Variable v)