org.expressionj.expr.parser

Class EquationParser

java.lang.Object

org.expressionj.expr.parser.EquationParser

All Implemented Interfaces:

EquationParserConstants

public class EquationParser
extends java.lang.Object
implements EquationParserConstants

This class performs logical expression parsing and evaluation. It is build with JavaCC.

Field Summary

Fields

Modifier and Type	Field and Description
static Token	jj_nt Next token.
static Token	token Current token.
static EquationParserTokenManager	token_source Generated Token Manager.

Fields inherited from interface org.expressionj.expr.parser.EquationParserConstants

ABS, ACOS, ADD, ADDASSIGNMENT, AFFECTATION, AND, ASIN, ATAN, BREAK, CEIL, CHARACTERS, CLOSEBRACKET, CLOSECURLY, CLOSEPARENTHESIS, COMMA, COMMENT, CONST, COS, DECREMENT, DEFAULT, DIGITS, DIV, DIVASSIGNMENT, DOLLAR_VAR, ECHO, ELSE, EOF, EQ, FIELD, FLOOR, GE, GT, IDENTIFIER, IF, INCREMENT, LE, LT, MOD, MULT, MULTASSIGNMENT, NEQ, NOT, OPENBRACKET, OPENCURLY, OPENPARENTHESIS, OR, RETURN, SEMICOLON, SIGN, SIN, SQRT, SUB, SUBASSIGNMENT, TAN, TEXT, TODEGREES, tokenImage, TORADIANS, TYPE, VALUE, WHILE, XOR

Constructor Summary

Constructors

Constructor and Description
EquationParser(EquationParserTokenManager tm) Constructor with generated Token Manager.
EquationParser(java.io.InputStream stream) Constructor with InputStream.
EquationParser(java.io.InputStream stream, java.lang.String encoding) Constructor with InputStream and supplied encoding
EquationParser(java.io.Reader stream) Constructor.

Method Summary

Modifier and Type	Method and Description
static void	acceptUndefinedVariables(boolean accept)
static void	addAssign()
static void	affect()
static void	affectInType()
static void	arrayAffect()
static void	arrayDeclaration()
static void	block()
static void	breakExpr()
static void	choice()
static void	closeCurly()
static void	closeCurlyArrayDeclaration()
static void	closePar()
static void	comma()
static void	constant()
static void	decrement()
static void	disable_tracing() Disable tracing.
static void	divAssign()
static void	element()
static void	elseblock()
static void	elseExpression()
static void	elseif()
static void	enable_tracing() Enable tracing.
static void	expr()
static void	exprContinuation()
static void	exprManyMULTDIVIDE()
static void	exprMULTDIVIDE()
static void	exprMULTDIVIDEContinuation()
static void	exprWithFirst()
static void	exprWithoutFirst()
static void	FormalParameters()
static ParseException	generateParseException() Generate ParseException.
static Token	getNextToken() Get the next Token.
static Token	getToken(int index) Get the specific Token.
static void	ifToken()
static void	increment()
static boolean	isAcceptingUndefinedVariables()
static void	main(java.lang.String[] args)
static void	multAssign()
static void	openCurly()
static void	openPar()
static void	parse()
static Equation	parse(java.io.File file) Parse an equation.
static Equation	parse(java.io.File file, java.util.List<Variable> vars) Parse an equation, passing to the parser a list of global variables.
static Equation	parse(java.lang.String text) Parse an equation.
static Equation	parse(java.lang.String text, java.util.List<Variable> vars) Parse an equation, passing to the parser a list of global variables.
static Equation	parse(java.net.URL url) Parse an equation.
static Equation	parse(java.net.URL url, java.util.List<Variable> vars) Parse an equation, passing to the parser a list of global variables.
void	ReInit(EquationParserTokenManager tm) Reinitialise.
static void	ReInit(java.io.InputStream stream) Reinitialise.
static void	ReInit(java.io.InputStream stream, java.lang.String encoding) Reinitialise.
static void	ReInit(java.io.Reader stream) Reinitialise.
static void	semicolon()
static void	subAssign()
static void	typedAffect()
static void	unary()
static void	whileExpr()
static void	whileToken()

Methods inherited from class java.lang.Object

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

Field Detail

token_source

public static EquationParserTokenManager token_source

Generated Token Manager.

token

public static Token token

Current token.

jj_nt

public static Token jj_nt

Next token.

Constructor Detail

EquationParser

public EquationParser(java.io.InputStream stream)

Constructor with InputStream.

EquationParser

public EquationParser(java.io.InputStream stream,
                      java.lang.String encoding)

Constructor with InputStream and supplied encoding

EquationParser

public EquationParser(java.io.Reader stream)

Constructor.

EquationParser

public EquationParser(EquationParserTokenManager tm)

Constructor with generated Token Manager.

Method Detail

main

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

Throws:

ParseException

acceptUndefinedVariables

public static void acceptUndefinedVariables(boolean accept)

isAcceptingUndefinedVariables

public static boolean isAcceptingUndefinedVariables()

parse

public static Equation parse(java.lang.String text,
                             java.util.List<Variable> vars)
                      throws ParseException

Parse an equation, passing to the parser a list of global variables.

Parameters:

text - the equation

vars - the list of global variables

Throws:

ParseException

parse

public static Equation parse(java.net.URL url)
                      throws ParseException,
                             java.io.IOException

Parse an equation.

Parameters:

url - the URL containing the equation

Throws:

ParseException

java.io.IOException

parse

public static Equation parse(java.net.URL url,
                             java.util.List<Variable> vars)
                      throws ParseException,
                             java.io.IOException

Parse an equation, passing to the parser a list of global variables.

Parameters:

url - the URL containing the equation

vars - the list of global variables

Throws:

ParseException

java.io.IOException

parse

public static Equation parse(java.io.File file)
                      throws ParseException,
                             java.io.IOException

Parse an equation.

Parameters:

file - the File containing the equation

Throws:

ParseException

java.io.IOException

parse

public static Equation parse(java.io.File file,
                             java.util.List<Variable> vars)
                      throws ParseException,
                             java.io.IOException

Parse an equation, passing to the parser a list of global variables.

Parameters:

file - the File containing the equation

vars - the list of global variables

Throws:

ParseException

java.io.IOException

parse

public static Equation parse(java.lang.String text)
                      throws ParseException

Parse an equation.

Parameters:

text - the equation

Throws:

ParseException

parse

public static final void parse()
                        throws ParseException

Throws:

ParseException

block

public static final void block()
                        throws ParseException

Throws:

ParseException

breakExpr

public static final void breakExpr()
                            throws ParseException

Throws:

ParseException

whileExpr

public static final void whileExpr()
                            throws ParseException

Throws:

ParseException

choice

public static final void choice()
                         throws ParseException

Throws:

ParseException

semicolon

public static final void semicolon()
                            throws ParseException

Throws:

ParseException

comma

public static final void comma()
                        throws ParseException

Throws:

ParseException

openCurly

public static final void openCurly()
                            throws ParseException

Throws:

ParseException

whileToken

public static final void whileToken()
                             throws ParseException

Throws:

ParseException

ifToken

public static final void ifToken()
                          throws ParseException

Throws:

ParseException

elseif

public static final void elseif()
                         throws ParseException

Throws:

ParseException

elseblock

public static final void elseblock()
                            throws ParseException

Throws:

ParseException

elseExpression

public static final void elseExpression()
                                 throws ParseException

Throws:

ParseException

closeCurlyArrayDeclaration

public static final void closeCurlyArrayDeclaration()
                                             throws ParseException

Throws:

ParseException

closeCurly

public static final void closeCurly()
                             throws ParseException

Throws:

ParseException

openPar

public static final void openPar()
                          throws ParseException

Throws:

ParseException

closePar

public static final void closePar()
                           throws ParseException

Throws:

ParseException

constant

public static final void constant()
                           throws ParseException

Throws:

ParseException

typedAffect

public static final void typedAffect()
                              throws ParseException

Throws:

ParseException

increment

public static final void increment()
                            throws ParseException

Throws:

ParseException

decrement

public static final void decrement()
                            throws ParseException

Throws:

ParseException

affect

public static final void affect()
                         throws ParseException

Throws:

ParseException

arrayAffect

public static final void arrayAffect()
                              throws ParseException

Throws:

ParseException

addAssign

public static final void addAssign()
                            throws ParseException

Throws:

ParseException

multAssign

public static final void multAssign()
                             throws ParseException

Throws:

ParseException

divAssign

public static final void divAssign()
                            throws ParseException

Throws:

ParseException

subAssign

public static final void subAssign()
                            throws ParseException

Throws:

ParseException

affectInType

public static final void affectInType()
                               throws ParseException

Throws:

ParseException

arrayDeclaration

public static final void arrayDeclaration()
                                   throws ParseException

Throws:

ParseException

expr

public static final void expr()
                       throws ParseException

Throws:

ParseException

exprWithoutFirst

public static final void exprWithoutFirst()
                                   throws ParseException

Throws:

ParseException

exprWithFirst

public static final void exprWithFirst()
                                throws ParseException

Throws:

ParseException

exprManyMULTDIVIDE

public static final void exprManyMULTDIVIDE()
                                     throws ParseException

Throws:

ParseException

exprMULTDIVIDEContinuation

public static final void exprMULTDIVIDEContinuation()
                                             throws ParseException

Throws:

ParseException

exprMULTDIVIDE

public static final void exprMULTDIVIDE()
                                 throws ParseException

Throws:

ParseException

exprContinuation

public static final void exprContinuation()
                                   throws ParseException

Throws:

ParseException

unary

public static final void unary()
                        throws ParseException

Throws:

ParseException

FormalParameters

public static final void FormalParameters()
                                   throws ParseException

Throws:

ParseException

element

public static final void element()
                          throws ParseException

Throws:

ParseException

ReInit

public static void ReInit(java.io.InputStream stream)

Reinitialise.

ReInit

public static void ReInit(java.io.InputStream stream,
                          java.lang.String encoding)

Reinitialise.

ReInit

public static void ReInit(java.io.Reader stream)

Reinitialise.

ReInit

public void ReInit(EquationParserTokenManager tm)

Reinitialise.

getNextToken

public static final Token getNextToken()

Get the next Token.

getToken

public static final Token getToken(int index)

Get the specific Token.

generateParseException

public static ParseException generateParseException()

Generate ParseException.

enable_tracing

public static final void enable_tracing()

Enable tracing.

disable_tracing

public static final void disable_tracing()

Disable tracing.