edu.psu.geovista.app.spreadsheet.formula
Class Formula

java.lang.Object
  edu.psu.geovista.app.spreadsheet.formula.Formula

public class Formula

extends java.lang.Object

Constructor Summary

Formula(Cell owner, java.lang.String input, int row, int col)
edu.psu.geovista.app.spreadsheet.formula.Formula contructor.

Formula(java.lang.String input, int row, int col, ParserException e)
edu.psu.geovista.app.spreadsheet.formula.Formula contructor.

Method Summary

boolean	addOwner(Cell cell)
java.lang.Number	evaluate()
java.lang.Number	evaluate(java.util.LinkedList postfix) It evaluates the postfix expression by a stack.
FunctionManager	getFunctionManager()
Cell	getOwner()
java.util.HashSet	getOwners() From the edu.psu.geovista.app.spreadsheet.formula.Node list; Creates the dependency set.
java.lang.Number	getValue() Return value *
boolean	isBad() Check for bad edu.psu.geovista.app.spreadsheet.formula.
boolean	needsRecalc() Check whether needs a recalc
static java.lang.Number	processCellValue(java.lang.Object o)
void	setBad()
void	setNeedsRecalc(boolean needs) Mark it as needsRecalc
java.lang.String	toString() This returns the string value of the edu.psu.geovista.app.spreadsheet.formula.

Methods inherited from class java.lang.Object

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

Constructor Detail

Formula

public Formula(java.lang.String input,
               int row,
               int col,
               ParserException e)

edu.psu.geovista.app.spreadsheet.formula.Formula contructor. This is used to construct a edu.psu.geovista.app.spreadsheet.formula.Formula object without any parsing process.

Parameters:

input - the edu.psu.geovista.app.spreadsheet.formula string

row - the current row where the edu.psu.geovista.app.spreadsheet.formula is stored

col - the current column where the forluma is stored

e - a edu.psu.geovista.app.spreadsheet.exception.ParserException

Formula

public Formula(Cell owner,
               java.lang.String input,
               int row,
               int col)
        throws ParserException

edu.psu.geovista.app.spreadsheet.formula.Formula contructor. Parse the input string and translate into postfix form.

Parameters:

input - the edu.psu.geovista.app.spreadsheet.formula string

row - the current row where the edu.psu.geovista.app.spreadsheet.formula is stored

col - the current column where the forluma is stored

See Also:

#toPostfix

Method Detail

getValue

public java.lang.Number getValue()

Return value *

isBad

public boolean isBad()

Check for bad edu.psu.geovista.app.spreadsheet.formula.

Returns:

boolean true if postfix

setBad

public void setBad()

needsRecalc

public boolean needsRecalc()

Check whether needs a recalc

Returns:

boolean true if needs recalculation

setNeedsRecalc

public void setNeedsRecalc(boolean needs)

Mark it as needsRecalc

getOwners

public java.util.HashSet getOwners()

From the edu.psu.geovista.app.spreadsheet.formula.Node list; Creates the dependency set.

Returns:

a HashSet of edu.psu.geovista.app.spreadsheet.formula.CellPoint that the current cell references

getOwner

public Cell getOwner()

addOwner

public boolean addOwner(Cell cell)

toString

public java.lang.String toString()

This returns the string value of the edu.psu.geovista.app.spreadsheet.formula.

Returns:

the string value

getFunctionManager

public FunctionManager getFunctionManager()

evaluate

public java.lang.Number evaluate()
                          throws ParserException,
                                 NoReferenceException

Throws:

ParserException

NoReferenceException

evaluate

public java.lang.Number evaluate(java.util.LinkedList postfix)
                          throws ParserException,
                                 NoReferenceException

It evaluates the postfix expression by a stack.

Parameters:

postfix - the edu.psu.geovista.app.spreadsheet.formula in postfix form

Returns:

the result as a Float object

Throws:

ParserException

NoReferenceException

processCellValue

public static java.lang.Number processCellValue(java.lang.Object o)
                                         throws ParserException,
                                                NoReferenceException

Throws:

ParserException

NoReferenceException