ConstantExpression
- java.lang.Object
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- com.dashoptimization.objects.Expression
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- com.dashoptimization.objects.AbstractExpression
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- com.dashoptimization.objects.ConstantExpression
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public final class ConstantExpression extends AbstractExpression
A constant value.- Since:
- 43.00
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Constructor Summary
Constructor Description ConstantExpression(double value)Create a new constant expression.
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Method Summary
Modifier and Type Method Description static ConstantExpressionconstant(double cnst)Utility function to create a constant expression.ConstantExpressiondiv(double arg)Create a new expression that represents the quotient ofthisandarg.ConstantExpressiondiv(ConstantExpression arg)Expressiondiv(Expression arg)Create a new expression that represents the quotient ofthisandarg.doubleevaluate(double[] solution)Compute the value of this expression with respect to the given solution vector (which is not required to be feasible).voidextract(double factor, PostfixExtractor extractor)Extract this expression into postfix notation.booleanextract(double factor, XPRSprob.RowCreator creator)Extract this expression into a row.doublegetValue()ConstantExpressionminus(double arg)Create a new expression that represents the difference ofthisandarg.ConstantExpressionminus(ConstantExpression arg)Expressionminus(Expression arg)Create a new expression that represents the difference ofthisandarg.ConstantExpressionmul(double arg)Create a new expression that represents the product ofthisandarg.ConstantExpressionmul(ConstantExpression arg)Expressionmul(Expression arg)Create a new expression that represents the product ofthisandarg.LinTermmul(LinTerm arg)QuadTermmul(QuadTerm arg)LinTermmul(Variable arg)ConstantExpressionplus(double arg)Create a new expression that represents the sum ofthisandarg.ConstantExpressionplus(ConstantExpression arg)Expressionplus(Expression arg)Create a new expression that represents the sum ofthisandarg.java.lang.StringtoString()ConstantExpressionuminus()Create a new expression that represents the unary minus of this one.
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Method Detail
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getValue
public double getValue()
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constant
public static ConstantExpression constant(double cnst)
Utility function to create a constant expression.- Parameters:
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cnst- Constant value for new expression. - Returns:
- The new expression.
- Since:
- 43.00
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extract
public boolean extract(double factor, XPRSprob.RowCreator creator)Extract this expression into a row. This is for internal use only, you should never have to call this function explicitly.- Specified by:
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extractin classExpression - Parameters:
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factor- Factor by which to multiply the expression during extraction. -
creator- The creator to which this expression should be extracted. - Returns:
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trueif the low-level representation does requires normalization (sorting, removal of dups, ...). In some special cases we know that this is not required and can returnfalseto save the overhead. - Since:
- 43.00
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evaluate
public double evaluate(double[] solution)
Compute the value of this expression with respect to the given solution vector (which is not required to be feasible).- Specified by:
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evaluatein classExpression - Parameters:
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solution- Solution values for which the expression is evaluated. - Since:
- 43.00
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extract
public void extract(double factor, PostfixExtractor extractor)Extract this expression into postfix notation.- Specified by:
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extractin classExpression - Parameters:
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factor- Factor by which to multiply the expression during extraction. -
extractor- The extractor to which the expression is extract. - Since:
- 43.00
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toString
public java.lang.String toString()
Used in these examples:
- GlobalRHSParametrics
- IISExample
- Knapsack
- Trimloss
- Overrides:
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toStringin classjava.lang.Object - Since:
- 43.00
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uminus
public ConstantExpression uminus()
Create a new expression that represents the unary minus of this one.- Overrides:
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uminusin classExpression - Returns:
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Expression representing
-this. - Since:
- 43.00
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plus
public Expression plus(Expression arg)
Create a new expression that represents the sum ofthisandarg.- Overrides:
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plusin classExpression - Parameters:
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arg- Addend. - Returns:
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Sum of
thisandarg. - Since:
- 43.00
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plus
public ConstantExpression plus(ConstantExpression arg)
- Since:
- 43.00
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plus
public ConstantExpression plus(double arg)
Create a new expression that represents the sum ofthisandarg.- Overrides:
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plusin classExpression - Parameters:
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arg- Addend. - Returns:
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Sum of
thisandarg. - Since:
- 43.00
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minus
public Expression minus(Expression arg)
Create a new expression that represents the difference ofthisandarg.- Overrides:
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minusin classExpression - Parameters:
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arg- Minuend. - Returns:
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Difference of
thisandarg. - Since:
- 43.00
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minus
public ConstantExpression minus(ConstantExpression arg)
- Since:
- 43.00
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minus
public ConstantExpression minus(double arg)
Create a new expression that represents the difference ofthisandarg.- Overrides:
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minusin classExpression - Parameters:
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arg- Minuend. - Returns:
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Difference of
thisandarg. - Since:
- 43.00
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mul
public Expression mul(Expression arg)
Create a new expression that represents the product ofthisandarg.- Overrides:
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mulin classExpression - Parameters:
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arg- Factor. - Returns:
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Product of
thisandarg. - Since:
- 43.00
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mul
public ConstantExpression mul(ConstantExpression arg)
- Since:
- 43.00
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mul
public ConstantExpression mul(double arg)
Create a new expression that represents the product ofthisandarg.- Overrides:
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mulin classExpression - Parameters:
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arg- Factor. - Returns:
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Product of
thisandarg. - Since:
- 43.00
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div
public Expression div(Expression arg)
Create a new expression that represents the quotient ofthisandarg.- Overrides:
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divin classExpression - Parameters:
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arg- Divisor. - Returns:
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Quotient of
thisandarg. - Since:
- 43.00
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div
public ConstantExpression div(ConstantExpression arg)
- Since:
- 43.00
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div
public ConstantExpression div(double arg)
Create a new expression that represents the quotient ofthisandarg.- Overrides:
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divin classExpression - Parameters:
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arg- Divisor. - Returns:
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Quotient of
thisandarg. - Since:
- 43.00
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