uk.co.cogitolearning.cogpar

Class VariableExpressionNode

java.lang.Object

uk.co.cogitolearning.cogpar.VariableExpressionNode

All Implemented Interfaces:

ExpressionNode

public class VariableExpressionNode
extends Object
implements ExpressionNode

An ExpressionNode that stores a named variable

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
VariableExpressionNode(String name) Construct with the name of the variable.

Method Summary

Modifier and Type	Method and Description
void	accept(ExpressionNodeVisitor visitor) Implementation of the visitor design pattern.
String	getName()
int	getType() Returns the type of the node, in this case ExpressionNode.VARIABLE_NODE
double	getValue() Returns the value of the variable but throws an exception if the value has not been set
void	setValue(double value) Sets the value of the variable

Methods inherited from class java.lang.Object

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

Constructor Detail

VariableExpressionNode

public VariableExpressionNode(String name)

Construct with the name of the variable.

Parameters:

name - the name of the variable

Method Detail

getName

public String getName()

Returns:

the name of the variable

getType

public int getType()

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

Specified by:

getType in interface ExpressionNode

Returns:

type of the node

setValue

public void setValue(double value)

Sets the value of the variable

Parameters:

value - the value of the variable

getValue

public double getValue()

Returns the value of the variable but throws an exception if the value has not been set

Specified by:

getValue in interface ExpressionNode

Returns:

value of expression

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