Package com.google.ortools.sat

Interface LinearExpr

All Superinterfaces:

LinearArgument

All Known Implementing Classes:

AffineExpression, ConstantExpression, WeightedSumExpression

public interface LinearExpr
extends LinearArgument

A linear expression (sum (ai * xi) + b). It specifies methods to help parsing the expression.

Method Summary

Modifier and Type	Method	Description
static LinearExpr	affine(LinearArgument expr, long coeff, long offset)	Shortcut for newBuilder().addTerm(expr, coeff).add(offset).build()
static LinearExpr	constant(long value)	Shortcut for newBuilder().add(value).build()
long	getCoefficient(int index)	Returns the ith coefficient.
long	getOffset()	Returns the constant part of the expression.
int	getVariableIndex(int index)	Returns the index of the ith variable.
static LinearExprBuilder	newBuilder()	Returns a builder
int	numElements()	Returns the number of terms (excluding the constant one) in this expression.
static LinearExpr	rebuildFromLinearExpressionProto(LinearExpressionProto proto)
static LinearExpr	sum(LinearArgument[] exprs)	Shortcut for newBuilder().addSum(exprs).build()
static LinearExpr	term(LinearArgument expr, long coeff)	Shortcut for newBuilder().addTerm(expr, coeff).build()
static LinearExpr	weightedSum(LinearArgument[] exprs, long[] coeffs)	Shortcut for newBuilder().addWeightedSum(exprs, coeffs).build()

Methods inherited from interface com.google.ortools.sat.LinearArgument

build

Method Detail

numElements

int numElements()

Returns the number of terms (excluding the constant one) in this expression.

getVariableIndex

int getVariableIndex(int index)

Returns the index of the ith variable.

getCoefficient

long getCoefficient(int index)

Returns the ith coefficient.

getOffset

long getOffset()

Returns the constant part of the expression.

newBuilder

static LinearExprBuilder newBuilder()

Returns a builder

constant

static LinearExpr constant(long value)

Shortcut for newBuilder().add(value).build()

term

static LinearExpr term(LinearArgument expr,
                       long coeff)

Shortcut for newBuilder().addTerm(expr, coeff).build()

affine

static LinearExpr affine(LinearArgument expr,
                         long coeff,
                         long offset)

Shortcut for newBuilder().addTerm(expr, coeff).add(offset).build()

sum

static LinearExpr sum(LinearArgument[] exprs)

Shortcut for newBuilder().addSum(exprs).build()

weightedSum

static LinearExpr weightedSum(LinearArgument[] exprs,
                              long[] coeffs)

Shortcut for newBuilder().addWeightedSum(exprs, coeffs).build()

rebuildFromLinearExpressionProto

static LinearExpr rebuildFromLinearExpressionProto(LinearExpressionProto proto)