org.apache.poi.xssf.streaming

Class SXSSFFormulaEvaluator

java.lang.Object

org.apache.poi.ss.formula.BaseFormulaEvaluator

org.apache.poi.xssf.usermodel.BaseXSSFFormulaEvaluator

org.apache.poi.xssf.streaming.SXSSFFormulaEvaluator

All Implemented Interfaces:

WorkbookEvaluatorProvider, FormulaEvaluator

public final class SXSSFFormulaEvaluator
extends BaseXSSFFormulaEvaluator

Streaming-specific Formula Evaluator, which is able to lookup cells within the current Window.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SXSSFFormulaEvaluator.RowFlushedException
static class	SXSSFFormulaEvaluator.SheetsFlushedException

Constructor Summary

Constructors

Constructor and Description
SXSSFFormulaEvaluator(SXSSFWorkbook workbook)

Method Summary

Modifier and Type	Method and Description
static SXSSFFormulaEvaluator	create(SXSSFWorkbook workbook, IStabilityClassifier stabilityClassifier, UDFFinder udfFinder)
void	evaluateAll() Loops over rows and cells, evaluating formula cells there.
static void	evaluateAllFormulaCells(SXSSFWorkbook wb, boolean skipOutOfWindow) For active worksheets only, will loop over rows and cells, evaluating formula cells there.
SXSSFCell	evaluateInCell(Cell cell) If cell contains formula, it evaluates the formula, and puts the formula result back into the cell, in place of the old formula.
void	notifyDeleteCell(Cell cell) Should be called to tell the cell value cache that the specified cell has just become a formula cell, or the formula text has changed
void	notifySetFormula(Cell cell) Should be called to tell the cell value cache that the specified (value or formula) cell has changed.
void	notifyUpdateCell(Cell cell) Should be called to tell the cell value cache that the specified (value or formula) cell has changed.

Methods inherited from class org.apache.poi.ss.formula.BaseFormulaEvaluator

_getWorkbookEvaluator, clearAllCachedResultValues, evaluate, evaluateAllFormulaCells, evaluateFormulaCell, evaluateFormulaCellEnum, setDebugEvaluationOutputForNextEval, setIgnoreMissingWorkbooks, setupEnvironment, setupReferencedWorkbooks

Methods inherited from class java.lang.Object

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

Constructor Detail

SXSSFFormulaEvaluator

public SXSSFFormulaEvaluator(SXSSFWorkbook workbook)

Method Detail

create

public static SXSSFFormulaEvaluator create(SXSSFWorkbook workbook,
                                           IStabilityClassifier stabilityClassifier,
                                           UDFFinder udfFinder)

Parameters:

stabilityClassifier - used to optimise caching performance. Pass null for the (conservative) assumption that any cell may have its definition changed after evaluation begins.

udfFinder - pass null for default (AnalysisToolPak only)

notifySetFormula

public void notifySetFormula(Cell cell)

Description copied from interface: FormulaEvaluator

Should be called to tell the cell value cache that the specified (value or formula) cell has changed. Failure to call this method after changing cell values will cause incorrect behaviour of the evaluate~ methods of this class

notifyDeleteCell

public void notifyDeleteCell(Cell cell)

Description copied from interface: FormulaEvaluator

Should be called to tell the cell value cache that the specified cell has just become a formula cell, or the formula text has changed

notifyUpdateCell

public void notifyUpdateCell(Cell cell)

Description copied from interface: FormulaEvaluator

Should be called to tell the cell value cache that the specified (value or formula) cell has changed. Failure to call this method after changing cell values will cause incorrect behaviour of the evaluate~ methods of this class

evaluateInCell

public SXSSFCell evaluateInCell(Cell cell)

Description copied from class: BaseFormulaEvaluator

If cell contains formula, it evaluates the formula, and puts the formula result back into the cell, in place of the old formula. Else if cell does not contain formula, this method leaves the cell unchanged. Note that the same instance of Cell is returned to allow chained calls like:

 int evaluatedCellType = evaluator.evaluateInCell(cell).getCellType();
 

Be aware that your cell value will be changed to hold the result of the formula. If you simply want the formula value computed for you, use BaseFormulaEvaluator.evaluateFormulaCell(Cell)}

Specified by:

evaluateInCell in interface FormulaEvaluator

Overrides:

evaluateInCell in class BaseFormulaEvaluator

Parameters:

cell - The Cell to evaluate and modify.

Returns:

the cell that was passed in, allowing for chained calls

evaluateAllFormulaCells

public static void evaluateAllFormulaCells(SXSSFWorkbook wb,
                                           boolean skipOutOfWindow)

For active worksheets only, will loop over rows and cells, evaluating formula cells there. If formula cells are outside the window for that sheet, it can either skip them silently, or give an exception

evaluateAll

public void evaluateAll()

Loops over rows and cells, evaluating formula cells there. If any sheets are inactive, or any cells outside of the window, will give an Exception. For SXSSF, you generally don't want to use this method, instead evaluate your formulas as you go before they leave the window.