uk.co.cogitolearning.cogpar

Class ConstantExpressionNode

java.lang.Object

uk.co.cogitolearning.cogpar.ConstantExpressionNode

All Implemented Interfaces:

ExpressionNode

public class ConstantExpressionNode
extends Object
implements ExpressionNode

An ExpressionNode that stores a constant value

Field Summary

Fields inherited from interface uk.co.cogitolearning.cogpar.ExpressionNode

ADDITION_NODE, CONSTANT_NODE, EXPONENTIATION_NODE, FUNCTION_NODE, MULTIPLICATION_NODE, VARIABLE_NODE

Constructor Summary

Constructors

Constructor and Description
ConstantExpressionNode(double value) Construct with the fixed value.
ConstantExpressionNode(String value) Convenience constructor that takes a string and converts it to a double before storing the value.

Method Summary

Modifier and Type	Method and Description
void	accept(ExpressionNodeVisitor visitor) Implementation of the visitor design pattern.
int	getType() Returns the type of the node, in this case ExpressionNode.CONSTANT_NODE
double	getValue() Returns the value of the constant

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantExpressionNode

public ConstantExpressionNode(double value)

Construct with the fixed value.

Parameters:

value - the value of the constant

ConstantExpressionNode

public ConstantExpressionNode(String value)

Convenience constructor that takes a string and converts it to a double before storing the value.

Parameters:

value - the string representation of the value

Method Detail

getValue

public double getValue()

Returns the value of the constant

Specified by:

getValue in interface ExpressionNode

Returns:

value of expression

getType

public int getType()

Returns the type of the node, in this case ExpressionNode.CONSTANT_NODE

Specified by:

getType in interface ExpressionNode

Returns:

type of the node

accept

public void accept(ExpressionNodeVisitor visitor)

Implementation of the visitor design pattern. Calls visit on the visitor.

Specified by:

accept in interface ExpressionNode

Parameters:

visitor - the visitor