Package com.google.ortools.modelbuilder

Class ModelBuilder

java.lang.Object

com.google.ortools.modelbuilder.ModelBuilder

public final class ModelBuilder
extends Object

Main modeling class.

Proposes a factory to create all modeling objects understood by the SAT solver.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ModelBuilder.MismatchedArrayLengths	Exception thrown when parallel arrays have mismatched lengths.
static class	ModelBuilder.WrongLength	Exception thrown when an array has a wrong length.

Constructor Summary

Constructors

Constructor	Description
ModelBuilder()

Method Summary

Modifier and Type	Method	Description
LinearConstraint	addEquality(LinearArgument expr, double value)	Adds expr == value.
LinearConstraint	addEquality(LinearArgument left, LinearArgument right)	Adds left == right.
LinearConstraint	addGreaterOrEqual(LinearArgument expr, double value)	Adds expr >= value.
LinearConstraint	addGreaterOrEqual(LinearArgument left, LinearArgument right)	Adds left >= right.
LinearConstraint	addLessOrEqual(LinearArgument expr, double value)	Adds expr <= value.
LinearConstraint	addLessOrEqual(LinearArgument left, LinearArgument right)	Adds left <= right.
LinearConstraint	addLinearConstraint(LinearArgument expr, double lb, double ub)	Adds lb <= expr <= ub.
boolean	exportToFile(String file)	Write the model as a protocol buffer to 'file'.
String	exportToLpString(boolean obfuscate)
String	exportToMpsString(boolean obfuscate)
ModelBuilderHelper	getHelper()	Returns the model builder helper.
String	getName()	Returns the name of the model.
boolean	importFromLpFile(String lpFile)
boolean	importFromLpString(String lpString)
boolean	importFromMpsFile(String mpsFile)
boolean	importFromMpsString(String mpsString)
void	maximize(LinearArgument obj)	Minimize expression
void	minimize(LinearArgument obj)	Minimize expression
Variable	newBoolVar(String name)	Creates a Boolean variable with the given name.
Variable	newConstant(double value)	Creates a constant variable.
Variable	newIntVar(double lb, double ub, String name)	Creates an integer variable with domain [lb, ub].
Variable	newNumVar(double lb, double ub, String name)	Creates an continuous variable with domain [lb, ub].
Variable	newVar(double lb, double ub, boolean isIntegral, String name)	Creates a variable with domain [lb, ub].
int	numConstraints()	Returns the number of constraints in the model.
int	numVariables()	Returns the number of variables in the model.
void	optimize(LinearArgument obj, boolean maximize)	Sets the objective expression.
void	setName(String name)	Sets the name of the model.
Variable	varFromIndex(int index)	Rebuilds a variable from its index.

Methods inherited from class java.lang.Object

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

Constructor Details

ModelBuilder

public ModelBuilder()

Method Details

newVar

public Variable newVar(double lb,
 double ub,
 boolean isIntegral,
 String name)

Creates a variable with domain [lb, ub].

newNumVar

public Variable newNumVar(double lb,
 double ub,
 String name)

Creates an continuous variable with domain [lb, ub].

newIntVar

public Variable newIntVar(double lb,
 double ub,
 String name)

Creates an integer variable with domain [lb, ub].

newBoolVar

public Variable newBoolVar(String name)

Creates a Boolean variable with the given name.

newConstant

public Variable newConstant(double value)

Creates a constant variable.

varFromIndex

public Variable varFromIndex(int index)

Rebuilds a variable from its index.

addLinearConstraint

public LinearConstraint addLinearConstraint(LinearArgument expr,
 double lb,
 double ub)

Adds lb <= expr <= ub.

numVariables

public int numVariables()

Returns the number of variables in the model.

addEquality

public LinearConstraint addEquality(LinearArgument expr,
 double value)

Adds expr == value.

addEquality

public LinearConstraint addEquality(LinearArgument left,
 LinearArgument right)

Adds left == right.

addLessOrEqual

public LinearConstraint addLessOrEqual(LinearArgument expr,
 double value)

Adds expr <= value.

addLessOrEqual

public LinearConstraint addLessOrEqual(LinearArgument left,
 LinearArgument right)

Adds left <= right.

addGreaterOrEqual

public LinearConstraint addGreaterOrEqual(LinearArgument expr,
 double value)

Adds expr >= value.

addGreaterOrEqual

public LinearConstraint addGreaterOrEqual(LinearArgument left,
 LinearArgument right)

Adds left >= right.

numConstraints

public int numConstraints()

Returns the number of constraints in the model.

minimize

public void minimize(LinearArgument obj)

Minimize expression

maximize

public void maximize(LinearArgument obj)

Minimize expression

optimize

public void optimize(LinearArgument obj,
 boolean maximize)

Sets the objective expression.

getName

public String getName()

Returns the name of the model.

setName

public void setName(String name)

Sets the name of the model.

exportToFile

public boolean exportToFile(String file)

Write the model as a protocol buffer to 'file'.

Parameters:

file - file to write the model to. If the filename ends with 'txt', the model will be written as a text file, otherwise, the binary format will be used.

Returns:

true if the model was correctly written.

exportToMpsString

public String exportToMpsString(boolean obfuscate)

exportToLpString

public String exportToLpString(boolean obfuscate)

importFromMpsString

public boolean importFromMpsString(String mpsString)

importFromMpsFile

public boolean importFromMpsFile(String mpsFile)

importFromLpString

public boolean importFromLpString(String lpString)

importFromLpFile

public boolean importFromLpFile(String lpFile)

getHelper

public ModelBuilderHelper getHelper()

Returns the model builder helper.