sjm.parse.tokens
Class NumberState

java.lang.Object
  |
  +--sjm.parse.tokens.TokenizerState
        |
        +--sjm.parse.tokens.NumberState

public class NumberState

extends TokenizerState

A NumberState object returns a number from a reader. This state's idea of a number allows an optional, initial minus sign, followed by one or more digits. A decimal point and another string of digits may follow these digits.

Version:

1.0

Author:

Steven J. Metsker

Field Summary

protected boolean	absorbedDot
protected boolean	absorbedLeadingMinus
protected int	c
protected boolean	gotAdigit
protected double	value

Constructor Summary

NumberState()

Method Summary

protected double	absorbDigits(java.io.PushbackReader r, boolean fraction)
Token	nextToken(java.io.PushbackReader r, int cin, Tokenizer t) Return a number token from a reader.
protected void	parseLeft(java.io.PushbackReader r)
protected void	parseRight(java.io.PushbackReader r)
protected void	reset(int cin)
protected Token	value(java.io.PushbackReader r, Tokenizer t)

Methods inherited from class java.lang.Object

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

Field Detail

c

protected int c

value

protected double value

absorbedLeadingMinus

protected boolean absorbedLeadingMinus

absorbedDot

protected boolean absorbedDot

gotAdigit

protected boolean gotAdigit

Constructor Detail

NumberState

public NumberState()

Method Detail

absorbDigits

protected double absorbDigits(java.io.PushbackReader r,
                              boolean fraction)
                       throws java.io.IOException

nextToken

public Token nextToken(java.io.PushbackReader r,
                       int cin,
                       Tokenizer t)
                throws java.io.IOException

Return a number token from a reader.

Overrides:

nextToken in class TokenizerState

Returns:

a number token from a reader

parseLeft

protected void parseLeft(java.io.PushbackReader r)
                  throws java.io.IOException

parseRight

protected void parseRight(java.io.PushbackReader r)
                   throws java.io.IOException

reset

protected void reset(int cin)

value

protected Token value(java.io.PushbackReader r,
                      Tokenizer t)
               throws java.io.IOException