Package jmri.jmrit.logixng.util.parser

Class ExpressionNodeComparingOperator

java.lang.Object

jmri.jmrit.logixng.util.parser.ExpressionNodeComparingOperator

All Implemented Interfaces:

ExpressionNode

public class ExpressionNodeComparingOperator
extends Object
implements ExpressionNode

A parsed expression

Constructor Summary

Constructors

Constructor	Description
ExpressionNodeComparingOperator(TokenType tokenType, ExpressionNode leftSide, ExpressionNode rightSide)

Method Summary

Modifier and Type	Method	Description
Object	calculate(SymbolTable symbolTable)	Calculate the expression
Object	calculateNull(Object left, Object right)
String	getDefinitionString()	Get a String that defines this expression node.

Methods inherited from class java.lang.Object

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

Methods inherited from interface jmri.jmrit.logixng.util.parser.ExpressionNode

assignValue, canBeAssigned

Constructor Details

ExpressionNodeComparingOperator

public ExpressionNodeComparingOperator(TokenType tokenType,
 ExpressionNode leftSide,
 ExpressionNode rightSide)

Method Details

calculateNull

public Object calculateNull(Object left,
 Object right)
                     throws JmriException

Throws:

JmriException

calculate

public Object calculate(SymbolTable symbolTable)
                 throws JmriException

Description copied from interface: ExpressionNode

Calculate the expression

Specified by:

calculate in interface ExpressionNode

Parameters:

symbolTable - the symbol table

Returns:

the result

Throws:

JmriException - if an error occurs

getDefinitionString

public String getDefinitionString()

Get a String that defines this expression node.

Specified by:

getDefinitionString in interface ExpressionNode

Returns:

the string