Package com.google.refine.grel

Class Scanner

java.lang.Object

com.google.refine.grel.Scanner

public class Scanner
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Scanner.ErrorToken
static class	Scanner.NumberToken
static class	Scanner.RegexToken
static class	Scanner.Token
static enum	Scanner.TokenType

Field Summary

Fields

Modifier and Type	Field	Description
protected int	_index
protected int	_limit
protected String	_text

Constructor Summary

Constructors

Constructor	Description
Scanner(String s)
Scanner(String s, int from, int to)

Method Summary

Modifier and Type	Method	Description
int	getIndex()
Scanner.Token	next(boolean regexPossible)	The regexPossible flag is used by the parser to hint the scanner what to do when it encounters a slash.

Methods inherited from class java.lang.Object

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

Field Details

_text

protected String _text

_index

protected int _index

_limit

protected int _limit

Constructor Details

Scanner

public Scanner(String s)

Scanner

public Scanner(String s,
 int from,
 int to)

Method Details

getIndex

public int getIndex()

next

public Scanner.Token next(boolean regexPossible)

The regexPossible flag is used by the parser to hint the scanner what to do when it encounters a slash. Since the divide operator / and the opening delimiter of a regex literal are the same, but divide operators and regex literals can't occur at the same place in an expression, this flag is a cheap way to distinguish the two without having to look ahead.

Parameters:

regexPossible -

Returns: