lt.monarch.math
Class FormulaTokenizer

java.lang.Object
  lt.monarch.math.AbstractTokenizer
      lt.monarch.math.FormulaTokenizer

public class FormulaTokenizer
extends AbstractTokenizer

Formula tokenizer class, which splits the formula into tokens and helps to determine if the token is a number, operator, function, varibale or constant.

Field Summary

Modifier and Type	Field and Description

Fields inherited from class lt.monarch.math.AbstractTokenizer

token

Constructor and Description

FormulaTokenizer(java.lang.String formula)
Formula tokenizer constructor

Method Summary

Modifier and Type	Method and Description
void	dispose() Disposes the tokenizer
protected void	finalize()
int	getPosition() Returns the position of the tokenizer.
java.lang.String	getPreviousToken() Return the previous token.
boolean	hasMoreTokens() Checks if the string has more tokens
boolean	isConstant() Checks if the last token is the constant.
boolean	isFunction() Checks if the last token is the function.
boolean	isNumber() Checks if the last token is the number.
boolean	isOperator() Checks if the last token is the operator.
boolean	isVariable() Checks if the token is the variable.
java.lang.String	nextToken() Returns next token

Methods inherited from class lt.monarch.math.AbstractTokenizer

isLeftBracket, isRightBracket

Methods inherited from class java.lang.Object

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

Constructor Detail

FormulaTokenizer

public FormulaTokenizer(java.lang.String formula)

Formula tokenizer constructor

Parameters:

formula - Formula string which has to be tokenized.

Method Detail

hasMoreTokens

public boolean hasMoreTokens()

Description copied from class: AbstractTokenizer

Checks if the string has more tokens

Specified by:

hasMoreTokens in class AbstractTokenizer

Returns:

true if has more tokens

nextToken

public java.lang.String nextToken()

Description copied from class: AbstractTokenizer

Returns next token

Specified by:

nextToken in class AbstractTokenizer

Returns:

Next token

isOperator

public boolean isOperator()

Checks if the last token is the operator.

Returns:

True is the last token is operator.

isNumber

public boolean isNumber()

Checks if the last token is the number.

Returns:

True is the last token is number.

isFunction

public boolean isFunction()

Checks if the last token is the function.

Returns:

True is the last token is function.

isConstant

public boolean isConstant()

Checks if the last token is the constant.

Returns:

True is the last token is constant.

isVariable

public boolean isVariable()

Checks if the token is the variable.

Returns:

True if the token is variable.

getPreviousToken

public java.lang.String getPreviousToken()

Description copied from class: AbstractTokenizer

Return the previous token.

Specified by:

getPreviousToken in class AbstractTokenizer

Returns:

Previous token.

getPosition

public int getPosition()

Description copied from class: AbstractTokenizer

Returns the position of the tokenizer.

Specified by:

getPosition in class AbstractTokenizer

Returns:

The position of the tokenizer in the original string.

dispose

public void dispose()

Description copied from class: AbstractTokenizer

Disposes the tokenizer

Specified by:

dispose in class AbstractTokenizer

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable