com.googlecode.aviator.lexer

Class ExpressionLexer

java.lang.Object

com.googlecode.aviator.lexer.ExpressionLexer

public class ExpressionLexer
extends Object

Expression Lexer,scan tokens from string

Author:

dennis

Constructor Summary

Constructors

Constructor and Description
ExpressionLexer(AviatorEvaluatorInstance instance, String expression)

Method Summary

Methods

Modifier and Type	Method and Description
int	getCurrentIndex()
String	getScanString()
static boolean	isBinaryOP(char ch)
boolean	isValidHexChar(char ch)
void	nextChar()
void	prevChar()
void	pushback(Token<?> token) Push back token
Token<?>	scan()
Token<?>	scan(boolean analyse)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionLexer

public ExpressionLexer(AviatorEvaluatorInstance instance,
               String expression)

Method Detail

pushback

public void pushback(Token<?> token)

Push back token

Parameters:

token -

scan

public Token<?> scan()

nextChar

public void nextChar()

prevChar

public void prevChar()

isValidHexChar

public boolean isValidHexChar(char ch)

getCurrentIndex

public int getCurrentIndex()

scan

public Token<?> scan(boolean analyse)

getScanString

public String getScanString()

isBinaryOP

public static boolean isBinaryOP(char ch)