com.jstatcom.parser
Class NumberRangeParser

java.lang.Object
  com.jstatcom.parser.NumberRangeParser

All Implemented Interfaces:

NumberRangeParserConstants

public class NumberRangeParser
extends java.lang.Object
implements NumberRangeParserConstants

Parser that assembles number range objects from an input string, for example

[1,100]
(-Infinity,Infinity)
[lowerBound",20)
(-Infinity, upperBound]
[1.2,1.2]
(-1.3e-2,1.3e-2)

One can use the parser via the parseString, parseStringToRange methods. If parseString is used, symbol names may be specified for the bounds. Valid symbol names start with a non digit and may contain letters, digits and "_" . Reserved keywords are ("+" | "-")? "Infinity" and "NaN" (all case insensititve). If a bound is specified as "NaN", the parser throws an exception. If parseStringToRange is used, only numbers are allowed for the bounds, not symbol names.

The parser has been generated with javacc.

Author:

Markus Kraetzig

See Also:

NumberRange

Field Summary

Token	jj_nt
Token	token
NumberRangeParserTokenManager	token_source

Fields inherited from interface com.jstatcom.parser.NumberRangeParserConstants

CONSTANT, DEFAULT, DELIM, DIGIT, EOF, EOL, FLOAT, INTEGER, LEFT_BRACKET, LETTER, MINUS, NAN, NEG_INF, POS_INF, RIGHT_BRACKET, SYMBOL_NAME, tokenImage

Constructor Summary

NumberRangeParser()
Default constructor.

NumberRangeParser(java.io.InputStream stream)

NumberRangeParser(NumberRangeParserTokenManager tm)

NumberRangeParser(java.io.Reader stream)

Method Summary

void	disable_tracing()
void	enable_tracing()
ParseException	generateParseException()
Token	getNextToken()
Token	getToken(int index)
void	leftBracket()
void	lowerBound_noSymbols()
void	lowerBound()
static void	main(java.lang.String[] args)
java.lang.Object[]	parseString(java.lang.String inputString) Reinitializes this engine and parses an input string.
NumberRange	parseStringToRange(java.lang.String inputString) Reinitializes this engine and parses an input string.
void	ReInit(java.io.InputStream stream)
void	ReInit(NumberRangeParserTokenManager tm)
void	ReInit(java.io.Reader stream)
void	rightBracket()
int	toeval_noSymbols() Parses the expression allowing only for numbers.
int	toeval() Parses the expression allowing for symbol names as well as numbers.
void	upperBound_noSymbols()
void	upperBound()

Methods inherited from class java.lang.Object

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

Field Detail

token_source

public NumberRangeParserTokenManager token_source

token

public Token token

jj_nt

public Token jj_nt

Constructor Detail

NumberRangeParser

public NumberRangeParser()

Default constructor.

NumberRangeParser

public NumberRangeParser(NumberRangeParserTokenManager tm)

NumberRangeParser

public NumberRangeParser(java.io.InputStream stream)

NumberRangeParser

public NumberRangeParser(java.io.Reader stream)

Method Detail

disable_tracing

public final void disable_tracing()

enable_tracing

public final void enable_tracing()

generateParseException

public final ParseException generateParseException()

getNextToken

public final Token getNextToken()

getToken

public final Token getToken(int index)

leftBracket

public final void leftBracket()
                       throws ParseException

Throws:

ParseException

lowerBound

public final void lowerBound()
                      throws ParseException

Throws:

ParseException

lowerBound_noSymbols

public final void lowerBound_noSymbols()
                                throws ParseException

Throws:

ParseException

main

public static void main(java.lang.String[] args)
                 throws ParseException

Throws:

ParseException

parseString

public java.lang.Object[] parseString(java.lang.String inputString)
                               throws ParseException,
                                      TokenMgrError

Reinitializes this engine and parses an input string. In this parser run numbers as well as symbol names are allowed for the bounds specification.

Valid symbol names start with a non digit and may contain letters, digits and "_" . Reserved keywords are ("+" | "-")? "Infinity" and "NaN" (all case insensititve). If a bound is specified as "NaN", the parser throws an exception, because this stands usually for missing value.

Parameters:

inputString - the string to parse

Returns:

object array (3 x 1) if parser and assembly where successful,
object[0] = lower bound
object[1] = upper bound
object[2] = range type

Throws:

ParseException - if parsing failed, contains error description

TokenMgrError - if tokenizing failed, contains error description

parseStringToRange

public NumberRange parseStringToRange(java.lang.String inputString)
                               throws ParseException,
                                      TokenMgrError

Reinitializes this engine and parses an input string. In this parser run, symbol names are not allowed for the bounds specification, only numbers with ("+" | "-")? "Infinity" as possible identifiers.

Parameters:

inputString - the string to parse

Returns:

a number range if parser and assembly where successful

Throws:

ParseException - if parsing failed, contains error description

TokenMgrError - if tokenizing failed, contains error description

ReInit

public void ReInit(NumberRangeParserTokenManager tm)

ReInit

public void ReInit(java.io.InputStream stream)

ReInit

public void ReInit(java.io.Reader stream)

rightBracket

public final void rightBracket()
                        throws ParseException

Throws:

ParseException

toeval

public final int toeval()
                 throws ParseException

Parses the expression allowing for symbol names as well as numbers.

Throws:

ParseException

toeval_noSymbols

public final int toeval_noSymbols()
                           throws ParseException

Parses the expression allowing only for numbers.

Throws:

ParseException

upperBound

public final void upperBound()
                      throws ParseException

Throws:

ParseException

upperBound_noSymbols

public final void upperBound_noSymbols()
                                throws ParseException

Throws:

ParseException