com::cosylab::gui::components::r2::FloatingPointParser Class Reference

Collaboration diagram for com::cosylab::gui::components::r2::FloatingPointParser:

[legend]

List of all members.

Public Member Functions
	FloatingPointParser ()
synchronized final double	parseDouble (String s) throws RuntimeException
Private Member Functions
final void	doAction (int state, int symbol, char ch)
final int	getNextSymbol (char ch)
final boolean	parse (String s)
Private Attributes
String	a = ""
String	b = ""
String	c = ""
Static Private Attributes
static final int	ERROR_STATE = 99
static final int[][]	transitions
static final java.text.DecimalFormatSymbols	symbols = new java.text.DecimalFormatSymbols()

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Detailed Description

Simple, robust floating point number parser.

The parser is derived from the following regular expression:

[+-]?[0-9]*(\.[0-9]*)?((e[+-]?)[0-9]*)?

This expression allows maximum flexibility in description of floating point numbers, while still generating expected output. Every state of this parser is final and therefore suitable for parsing of sequential user input, where intermediate states are not valid values.

Creation date: (12/16/2001 16:46:23)

Author:

: Ales Pucelj (ales.pucelj@kgb.ijs.si)

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Constructor & Destructor Documentation

com::cosylab::gui::components::r2::FloatingPointParser::FloatingPointParser

(

)

[inline]

Creates new parser.

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Member Function Documentation

final void com::cosylab::gui::components::r2::FloatingPointParser::doAction	(	int	state,
		int	symbol,
		char	ch
	)			[inline, private]

Performs action associated with each state. Creation date: (12/16/2001 17:04:50)

Parameters:

	state	int
	ch	Char

References a, b, and c.

Referenced by parse().

final int com::cosylab::gui::components::r2::FloatingPointParser::getNextSymbol

(

char

ch

)

[inline, private]

Returns symbol based on character. Creation date: (12/16/2001 16:49:11)

Returns:

int

Parameters:

ch

char

References symbols.

Referenced by parse().

final boolean com::cosylab::gui::components::r2::FloatingPointParser::parse

(

String

s

)

[inline, private]

Performs the actual parsing. Creation date: (12/16/2001 16:48:37)

Returns:

boolean

Parameters:

s

java.lang.String

References a, b, c, doAction(), ERROR_STATE, getNextSymbol(), and transitions.

Referenced by parseDouble().

synchronized final double com::cosylab::gui::components::r2::FloatingPointParser::parseDouble

(

String

s

)

throws RuntimeException [inline]

Parses the supplied string and tries to convert it to double. Creation date: (12/16/2001 16:47:57)

Exceptions:

RuntimeException

Returns:

double

Parameters:

s

java.lang.String

References a, b, c, and parse().

Referenced by com::cosylab::gui::components::r2::JDoubleTextField::DoubleDocument::insertString(), and com::cosylab::gui::components::r2::JDoubleTextField::DoubleDocument::remove().

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Member Data Documentation

String com::cosylab::gui::components::r2::FloatingPointParser::a = "" [private]

Referenced by doAction(), parse(), and parseDouble().

String com::cosylab::gui::components::r2::FloatingPointParser::b = "" [private]

Referenced by doAction(), parse(), and parseDouble().

String com::cosylab::gui::components::r2::FloatingPointParser::c = "" [private]

Referenced by doAction(), parse(), and parseDouble().

final int com::cosylab::gui::components::r2::FloatingPointParser::ERROR_STATE = 99 [static, private]

Referenced by parse().

final java.text.DecimalFormatSymbols com::cosylab::gui::components::r2::FloatingPointParser::symbols = new java.text.DecimalFormatSymbols() [static, private]

Referenced by getNextSymbol().

final int [][] com::cosylab::gui::components::r2::FloatingPointParser::transitions [static, private]

Initial value:

 { 
            { 99,  1,  1,  2,  3 }, 
            { 99, 99,  1,  2,  3 }, 
            { 99, 99,  2, 99,  3 }, 
            { 99,  4,  4, 99, 99 }, 
            { 99, 99,  4, 99, 99 }
    }

Referenced by parse().

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The documentation for this class was generated from the following file:

• FloatingPointParser.java