org.histpop.ohpr.frames.dateparser
Class DateScanner

java.lang.Object
  org.histpop.ohpr.frames.dateparser.DateScanner

All Implemented Interfaces:

java_cup.runtime.Scanner

public class DateScanner
extends java.lang.Object
implements java_cup.runtime.Scanner

A lexical token scanner for the dates as submitted from the query form.

Field Summary

protected static int	eof
protected java.io.Reader	instream
protected int	lastPos
protected int	next_char
protected int	pos
protected java.lang.String	queryString

Constructor Summary

DateScanner(java.lang.String queryString)

Method Summary

protected void	advance() advance input by one character
protected void	init() initialize the scanner
protected int	lookahead() get a look ahead character, within advancing on the input stream
java_cup.runtime.Symbol	next_token() Return the next token, or new Symbol(0) on end-of-file.
java.lang.String	parsedString() find the token string which has been parsed so far
protected java.lang.String	remainingString() find the remaining unscanned token string
protected java.lang.Integer	scanNumber() scan for an unsigned integer

Methods inherited from class java.lang.Object

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

Field Detail

instream

protected java.io.Reader instream

next_char

protected int next_char

eof

protected static final int eof

See Also:

Constant Field Values

pos

protected int pos

lastPos

protected int lastPos

queryString

protected java.lang.String queryString

Constructor Detail

DateScanner

public DateScanner(java.lang.String queryString)

Method Detail

advance

protected void advance()
                throws java.io.IOException

advance input by one character

Throws:

java.io.IOException

init

protected void init()
             throws java.io.IOException

initialize the scanner

Throws:

java.io.IOException

remainingString

protected java.lang.String remainingString()

find the remaining unscanned token string

parsedString

public java.lang.String parsedString()

find the token string which has been parsed so far

scanNumber

protected java.lang.Integer scanNumber()
                                throws java.lang.Exception

scan for an unsigned integer

Throws:

java.lang.Exception

lookahead

protected int lookahead()
                 throws java.io.IOException

get a look ahead character, within advancing on the input stream

Throws:

java.io.IOException

next_token

public java_cup.runtime.Symbol next_token()
                                   throws java.lang.Exception

Return the next token, or new Symbol(0) on end-of-file.

Specified by:

next_token in interface java_cup.runtime.Scanner

Throws:

java.lang.Exception