Package jmri.jmrit.logixng.util.parser

Class ExpressionNodeComplex

java.lang.Object

jmri.jmrit.logixng.util.parser.ExpressionNodeComplex

All Implemented Interfaces:

ExpressionNode

public class ExpressionNodeComplex
extends Object
implements ExpressionNode

A parsed expression

Constructor Summary

Constructors

Constructor	Description
ExpressionNodeComplex(ExpressionNode firstNode, ExpressionNodeWithParameter secondNode)

Method Summary

Modifier and Type	Method	Description
void	assignValue(SymbolTable symbolTable, Object value)	Assign a value to this expression
Object	calculate(SymbolTable symbolTable)	Calculate the expression
boolean	canBeAssigned()	Can this expression be assigned a value?
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

Constructor Details

ExpressionNodeComplex

public ExpressionNodeComplex(ExpressionNode firstNode,
 ExpressionNodeWithParameter secondNode)

Method Details

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

canBeAssigned

public boolean canBeAssigned()

Can this expression be assigned a value?

Specified by:

canBeAssigned in interface ExpressionNode

Returns:

true if it's possible to assign a value to this expression, false otherwise

assignValue

public void assignValue(SymbolTable symbolTable,
 Object value)
                 throws JmriException

Assign a value to this expression

Specified by:

assignValue in interface ExpressionNode

Parameters:

symbolTable - the symbol table

value - the value to assign

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