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bug# 45973: added factory method for FormulaEvaluator, also fixed unpaired tags in javadocs 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@713021 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Yegor Kozlov 2008-11-11 11:43:20 +00:00
parent 32de644e51
commit aa8ee7d78c
13 changed files with 389 additions and 346 deletions
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1
src/documentation/content/xdocs/changes.xml
View File

@ -37,6 +37,7 @@
<!-- Don't forget to update status.xml too! -->
<release version="3.5-beta4" date="2008-??-??">
<action dev="POI-DEVELOPERS" type="add">45973 - added CreationHelper.createFormulaEvaluator(), implemeted both for HSSF and XSSF</action>
<action dev="POI-DEVELOPERS" type="fix">46182 - fixed Slideshow.readPictures() to skip pictures with invalid headers</action>
<action dev="POI-DEVELOPERS" type="fix">46137 - Handle odd files with a ContinueRecord after EOFRecord</action>
<action dev="POI-DEVELOPERS" type="fix">Fixed problem with linking shared formulas when ranges overlap</action>

175
src/documentation/content/xdocs/spreadsheet/eval.xml
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@ -32,10 +32,7 @@
formulas in Excels sheets read-in, or created in POI. This document explains
how to use the API to evaluate your formulas.
</p>
<note>In versions of POI before 3.0.3, this code lived in the
scratchpad area of the POI SVN repository. If using an such an older
version of POI, ensure that you have the scratchpad jar or the
scratchpad build area in your classpath before experimenting with this
<note>.xlsx format is suported since POI 3.5, make sure yoy upgraded to that version before experimenting with this
code. Users of all versions of POI may wish to make use of a recent
SVN checkout, as new functions are currently being added fairly frequently.
</note>
@ -47,7 +44,8 @@
It also provides implementations for approx. 100 built in
functions in Excel. The framework however makes is easy to add
implementation of new functions. See the <link href="eval-devguide.html"> Formula
evaluation development guide</link> for details. </p>
evaluation development guide</link> and <link href="../apidocs/org/apache/poi/hssf/record/formula/functions/package-summary.html">javadocs</link>
for details. </p>
<p> Both HSSFWorkbook and XSSFWorkbook are supported, so you can
evaluate formulas on both .xls and .xlsx files.</p>
<p> Note that user-defined functions are not supported, and is not likely to done
@ -66,38 +64,37 @@
without affecting the cell</p>
<source>
FileInputStream fis = new FileInputStream("c:/temp/test.xls");
Workbook wb = new HSSFWorkbook(fis);
Workbook wb = new HSSFWorkbook(fis); //or new XSSFWorkbook("c:/temp/test.xls")
Sheet sheet = wb.getSheetAt(0);
FormulaEvaluator evaluator = new FormulaEvaluator(sheet, wb);
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
// suppose your formula is in B3
CellReference cellReference = new CellReference("B3");
Row row = sheet.getRow(cellReference.getRow());
Cell cell = row.getCell(cellReference.getCol());
evaluator.setCurrentRow(row);
FormulaEvaluator.CellValue cellValue = evaluator.evaluate(cell);
CellValue cellValue = evaluator.evaluate(cell);
switch (cellValue.getCellType()) {
case Cell.CELL_TYPE_BOOLEAN:
System.out.println(cellValue.getBooleanValue());
break;
case Cell.CELL_TYPE_NUMERIC:
System.out.println(cellValue.getNumberValue());
break;
case Cell.CELL_TYPE_STRING:
System.out.println(cellValue.getStringValue());
break;
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_ERROR:
break;
case Cell.CELL_TYPE_BOOLEAN:
System.out.println(cellValue.getBooleanValue());
break;
case Cell.CELL_TYPE_NUMERIC:
System.out.println(cellValue.getNumberValue());
break;
case Cell.CELL_TYPE_STRING:
System.out.println(cellValue.getStringValue());
break;
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_ERROR:
break;
// CELL_TYPE_FORMULA will never happen
case Cell.CELL_TYPE_FORMULA:
break;
// CELL_TYPE_FORMULA will never happen
case Cell.CELL_TYPE_FORMULA:
break;
}
</source>
</source>
<p>Thus using the retrieved value (of type
FormulaEvaluator.CellValue - a nested class) returned
by FormulaEvaluator is similar to using a Cell object
@ -117,39 +114,38 @@ switch (cellValue.getCellType()) {
formula remains in the cell, just with a new value</p>
<p>The return of the function is the type of the
formula result, such as Cell.CELL_TYPE_BOOLEAN</p>
<source>
<source>
FileInputStream fis = new FileInputStream("/somepath/test.xls");
Workbook wb = new HSSFWorkbook(fis);
Workbook wb = new HSSFWorkbook(fis); //or new XSSFWorkbook("/somepath/test.xls")
Sheet sheet = wb.getSheetAt(0);
FormulaEvaluator evaluator = new FormulaEvaluator(sheet, wb);
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
// suppose your formula is in B3
CellReference cellReference = new CellReference("B3");
Row row = sheet.getRow(cellReference.getRow());
Cell cell = row.getCell(cellReference.getCol());
evaluator.setCurrentRow(row);
if (cell!=null) {
switch (<strong>evaluator.evaluateFormulaCell</strong>(cell)) {
case Cell.CELL_TYPE_BOOLEAN:
System.out.println(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_NUMERIC:
System.out.println(cell.getNumberCellValue());
break;
case Cell.CELL_TYPE_STRING:
System.out.println(cell.getStringCellValue());
break;
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_ERROR:
System.out.println(cell.getErrorCellValue());
break;
// CELL_TYPE_FORMULA will never occur
case Cell.CELL_TYPE_FORMULA:
break;
}
switch (evaluator.evaluateFormulaCell(cell)) {
case Cell.CELL_TYPE_BOOLEAN:
System.out.println(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_NUMERIC:
System.out.println(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING:
System.out.println(cell.getStringCellValue());
break;
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_ERROR:
System.out.println(cell.getErrorCellValue());
break;
// CELL_TYPE_FORMULA will never occur
case Cell.CELL_TYPE_FORMULA:
break;
}
}
</source>
</section>
@ -163,64 +159,59 @@ if (cell!=null) {
in place of the old formula.</p>
<source>
FileInputStream fis = new FileInputStream("/somepath/test.xls");
Workbook wb = new HSSFWorkbook(fis);
Workbook wb = new HSSFWorkbook(fis); //or new XSSFWorkbook("/somepath/test.xls")
Sheet sheet = wb.getSheetAt(0);
FormulaEvaluator evaluator = new FormulaEvaluator(sheet, wb);
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
// suppose your formula is in B3
CellReference cellReference = new CellReference("B3");
CellReference cellReference = new CellReference("B3");
Row row = sheet.getRow(cellReference.getRow());
Cell cell = row.getCell(cellReference.getCol());
evaluator.setCurrentRow(row);
if (cell!=null) {
switch (<strong>evaluator.evaluateInCell</strong>(cell).getCellType()) {
case Cell.CELL_TYPE_BOOLEAN:
System.out.println(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_NUMERIC:
System.out.println(cell.getNumberCellValue());
break;
case Cell.CELL_TYPE_STRING:
System.out.println(cell.getStringCellValue());
break;
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_ERROR:
System.out.println(cell.getErrorCellValue());
break;
// CELL_TYPE_FORMULA will never occur
case Cell.CELL_TYPE_FORMULA:
break;
}
switch (evaluator.<strong>evaluateInCell</strong>(cell).getCellType()) {
case Cell.CELL_TYPE_BOOLEAN:
System.out.println(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_NUMERIC:
System.out.println(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING:
System.out.println(cell.getStringCellValue());
break;
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_ERROR:
System.out.println(cell.getErrorCellValue());
break;
// CELL_TYPE_FORMULA will never occur
case Cell.CELL_TYPE_FORMULA:
break;
}
}
</source>
</source>
</section>
<anchor id="EvaluateAll"/>
<section><title>Re-calculating all formulas in a Workbook</title>
<source>
FileInputStream fis = new FileInputStream("/somepath/test.xls");
Workbook wb = new HSSFWorkbook(fis);
Workbook wb = new HSSFWorkbook(fis); //or new XSSFWorkbook("/somepath/test.xls")
FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
for(int sheetNum = 0; sheetNum &lt; wb.getNumberOfSheets(); sheetNum++) {
Sheet sheet = wb.getSheetAt(sheetNum);
FormulaEvaluator evaluator = new FormulaEvaluator(sheet, wb);
for(Iterator rit = sheet.rowIterator(); rit.hasNext();) {
Row r = (Row)rit.next();
evaluator.setCurrentRow(r);
for(Iterator cit = r.cellIterator(); cit.hasNext();) {
Cell c = (Cell)cit.next();
if(c.getCellType() == Cell.CELL_TYPE_FORMULA) {
evaluator.evaluateFormulaCell(c);
}
}
}
Sheet sheet = wb.getSheetAt(sheetNum);
for(Row r : sheet) {
for(Cell c : r) {
if(c.getCellType() == Cell.CELL_TYPE_FORMULA) {
evaluator.evaluateFormulaCell(c);
}
}
}
}
wb.write(new FileOutputStream("/somepath/changed.xls"));
</source>
</source>
</section>
</section>

1
src/documentation/content/xdocs/status.xml
View File

@ -34,6 +34,7 @@
<!-- Don't forget to update changes.xml too! -->
<changes>
<release version="3.5-beta4" date="2008-??-??">
<action dev="POI-DEVELOPERS" type="add">45973 - added CreationHelper.createFormulaEvaluator(), implemeted both for HSSF and XSSF</action>
<action dev="POI-DEVELOPERS" type="fix">46182 - fixed Slideshow.readPictures() to skip pictures with invalid headers</action>
<action dev="POI-DEVELOPERS" type="fix">46137 - Handle odd files with a ContinueRecord after EOFRecord</action>
<action dev="POI-DEVELOPERS" type="fix">Fixed problem with linking shared formulas when ranges overlap</action>

8
src/java/org/apache/poi/hssf/record/formula/functions/Countif.java
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@ -31,14 +31,14 @@ import org.apache.poi.hssf.record.formula.eval.StringEval;
import org.apache.poi.hssf.record.formula.functions.CountUtils.I_MatchPredicate;
/**
* Implementation for the function COUNTIF<p/>
*
* Syntax: COUNTIF ( range, criteria )
* Implementation for the function COUNTIF
* <p>
* Syntax: COUNTIF ( range, criteria )
* <table border="0" cellpadding="1" cellspacing="0" summary="Parameter descriptions">
* <tr><th>range&nbsp;&nbsp;&nbsp;</th><td>is the range of cells to be counted based on the criteria</td></tr>
* <tr><th>criteria</th><td>is used to determine which cells to count</td></tr>
* </table>
* <p/>
* </p>
*
* @author Josh Micich
*/

13
src/java/org/apache/poi/hssf/record/formula/functions/Errortype.java
View File

@ -25,13 +25,13 @@ import org.apache.poi.hssf.record.formula.eval.OperandResolver;
import org.apache.poi.hssf.usermodel.HSSFErrorConstants;
/**
* Implementation for the ERROR.TYPE() Excel function.<p/>
*
* Implementation for the ERROR.TYPE() Excel function.
* <p>
* <b>Syntax:</b><br/>
* <b>ERROR.TYPE</b>(<b>errorValue</b>)<p/>
*
* <b>ERROR.TYPE</b>(<b>errorValue</b>)</p>
* <p>
* Returns a number corresponding to the error type of the supplied argument.<p/>
*
* <p>
* <table border="1" cellpadding="1" cellspacing="1" summary="Return values for ERROR.TYPE()">
* <tr><td>errorValue</td><td>Return Value</td></tr>
* <tr><td>#NULL!</td><td>1</td></tr>
@ -46,7 +46,8 @@ import org.apache.poi.hssf.usermodel.HSSFErrorConstants;
*
* Note - the results of ERROR.TYPE() are different to the constants defined in
* <tt>HSSFErrorConstants</tt>.
*
* </p>
*
* @author Josh Micich
*/
public final class Errortype implements Function {

5
src/java/org/apache/poi/hssf/record/formula/functions/Index.java
View File

@ -26,7 +26,8 @@ import org.apache.poi.hssf.record.formula.eval.RefEval;
import org.apache.poi.hssf.record.formula.eval.ValueEval;
/**
* Implementation for the Excel function INDEX<p/>
* Implementation for the Excel function INDEX
* <p>
*
* Syntax : <br/>
* INDEX ( reference, row_num[, column_num [, area_num]])</br>
@ -38,7 +39,7 @@ import org.apache.poi.hssf.record.formula.eval.ValueEval;
* <tr><th>column_num</th><td>selects column within the array or area reference. default is 1</td></tr>
* <tr><th>area_num</th><td>used when reference is a union of areas</td></tr>
* </table>
* <p/>
* </p>
*
* @author Josh Micich
*/

4
src/java/org/apache/poi/hssf/record/formula/functions/Sumproduct.java
View File

@ -31,7 +31,7 @@ import org.apache.poi.hssf.record.formula.eval.ValueEval;
/**
* Implementation for the Excel function SUMPRODUCT<p/>
* Implementation for the Excel function SUMPRODUCT<p>
*
* Syntax : <br/>
* SUMPRODUCT ( array1[, array2[, array3[, ...]]])
@ -49,7 +49,7 @@ import org.apache.poi.hssf.record.formula.eval.ValueEval;
* A<b>n</b><sub>(<b>i</b>,<b>j</b>)</sub>&nbsp;
* )&nbsp;
* )
*
* </p>
* @author Josh Micich
*/
public final class Sumproduct implements Function {

2
src/java/org/apache/poi/hssf/usermodel/HSSFCell.java
View File

@ -671,9 +671,7 @@ public class HSSFCell implements Cell {
* get the value of the cell as a string - for numeric cells we throw an exception.
* For blank cells we return an empty string.
* For formulaCells that are not string Formulas, we return empty String
* @deprecated Use the HSSFRichTextString return
*/
public String getStringCellValue()
{
HSSFRichTextString str = getRichStringCellValue();

10
src/java/org/apache/poi/hssf/usermodel/HSSFCreationHelper.java
View File

@ -44,4 +44,14 @@ public class HSSFCreationHelper implements CreationHelper {
public HSSFHyperlink createHyperlink(int type) {
return new HSSFHyperlink(type);
}
/**
* Creates a HSSFFormulaEvaluator, the object that evaluates formula cells.
*
* @return a HSSFFormulaEvaluator instance
*/
public HSSFFormulaEvaluator createFormulaEvaluator(){
return new HSSFFormulaEvaluator(workbook);
}
}

488
src/java/org/apache/poi/hssf/usermodel/HSSFFormulaEvaluator.java
View File

@ -28,6 +28,7 @@ import org.apache.poi.ss.formula.CollaboratingWorkbooksEnvironment;
import org.apache.poi.ss.formula.WorkbookEvaluator;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellValue;
import org.apache.poi.ss.usermodel.FormulaEvaluator;
/**
* Evaluates formula cells.<p/>
@ -39,255 +40,268 @@ import org.apache.poi.ss.usermodel.CellValue;
* @author Amol S. Deshmukh &lt; amolweb at ya hoo dot com &gt;
* @author Josh Micich
*/
public class HSSFFormulaEvaluator /* almost implements FormulaEvaluator */ {
public class HSSFFormulaEvaluator implements FormulaEvaluator {
private WorkbookEvaluator _bookEvaluator;
private WorkbookEvaluator _bookEvaluator;
/**
* @deprecated (Sep 2008) HSSFSheet parameter is ignored
*/
public HSSFFormulaEvaluator(HSSFSheet sheet, HSSFWorkbook workbook) {
this(workbook);
if (false) {
sheet.toString(); // suppress unused parameter compiler warning
}
}
public HSSFFormulaEvaluator(HSSFWorkbook workbook) {
_bookEvaluator = new WorkbookEvaluator(HSSFEvaluationWorkbook.create(workbook));
}
/**
* Coordinates several formula evaluators together so that formulas that involve external
* references can be evaluated.
* @param workbookNames the simple file names used to identify the workbooks in formulas
* with external links (for example "MyData.xls" as used in a formula "[MyData.xls]Sheet1!A1")
* @param evaluators all evaluators for the full set of workbooks required by the formulas.
*/
public static void setupEnvironment(String[] workbookNames, HSSFFormulaEvaluator[] evaluators) {
WorkbookEvaluator[] wbEvals = new WorkbookEvaluator[evaluators.length];
for (int i = 0; i < wbEvals.length; i++) {
wbEvals[i] = evaluators[i]._bookEvaluator;
}
CollaboratingWorkbooksEnvironment.setup(workbookNames, wbEvals);
}
/**
* @deprecated (Sep 2008) HSSFSheet parameter is ignored
*/
public HSSFFormulaEvaluator(HSSFSheet sheet, HSSFWorkbook workbook) {
this(workbook);
if (false) {
sheet.toString(); // suppress unused parameter compiler warning
}
}
public HSSFFormulaEvaluator(HSSFWorkbook workbook) {
_bookEvaluator = new WorkbookEvaluator(HSSFEvaluationWorkbook.create(workbook));
}
/**
* Does nothing
* @deprecated (Aug 2008) - not needed, since the current row can be derived from the cell
*/
public void setCurrentRow(HSSFRow row) {
// do nothing
if (false) {
row.getClass(); // suppress unused parameter compiler warning
}
}
/**
* Coordinates several formula evaluators together so that formulas that involve external
* references can be evaluated.
* @param workbookNames the simple file names used to identify the workbooks in formulas
* with external links (for example "MyData.xls" as used in a formula "[MyData.xls]Sheet1!A1")
* @param evaluators all evaluators for the full set of workbooks required by the formulas.
*/
public static void setupEnvironment(String[] workbookNames, HSSFFormulaEvaluator[] evaluators) {
WorkbookEvaluator[] wbEvals = new WorkbookEvaluator[evaluators.length];
for (int i = 0; i < wbEvals.length; i++) {
wbEvals[i] = evaluators[i]._bookEvaluator;
}
CollaboratingWorkbooksEnvironment.setup(workbookNames, wbEvals);
}
/**
* Should be called whenever there are major changes (e.g. moving sheets) to input cells
* in the evaluated workbook. If performance is not critical, a single call to this method
* may be used instead of many specific calls to the notify~ methods.
*
* Failure to call this method after changing cell values will cause incorrect behaviour
* of the evaluate~ methods of this class
*/
public void clearAllCachedResultValues() {
_bookEvaluator.clearAllCachedResultValues();
}
/**
* 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
*/
public void notifyUpdateCell(HSSFCell cell) {
_bookEvaluator.notifyUpdateCell(new HSSFEvaluationCell(cell));
}
/**
* Should be called to tell the cell value cache that the specified cell has just been
* deleted.
* Failure to call this method after changing cell values will cause incorrect behaviour
* of the evaluate~ methods of this class
*/
public void notifyDeleteCell(HSSFCell cell) {
_bookEvaluator.notifyDeleteCell(new HSSFEvaluationCell(cell));
}
/**
* Does nothing
* @deprecated (Aug 2008) - not needed, since the current row can be derived from the cell
*/
public void setCurrentRow(HSSFRow row) {
// do nothing
if (false) {
row.getClass(); // suppress unused parameter compiler warning
}
}
/**
* If cell contains a formula, the formula is evaluated and returned,
* else the CellValue simply copies the appropriate cell value from
* the cell and also its cell type. This method should be preferred over
* evaluateInCell() when the call should not modify the contents of the
* original cell.
*
* @param cell may be <code>null</code> signifying that the cell is not present (or blank)
* @return <code>null</code> if the supplied cell is <code>null</code> or blank
*/
public CellValue evaluate(Cell cell) {
if (cell == null) {
return null;
}
/**
* Should be called whenever there are major changes (e.g. moving sheets) to input cells
* in the evaluated workbook. If performance is not critical, a single call to this method
* may be used instead of many specific calls to the notify~ methods.
*
* Failure to call this method after changing cell values will cause incorrect behaviour
* of the evaluate~ methods of this class
*/
public void clearAllCachedResultValues() {
_bookEvaluator.clearAllCachedResultValues();
}
/**
* 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
*/
public void notifyUpdateCell(HSSFCell cell) {
_bookEvaluator.notifyUpdateCell(new HSSFEvaluationCell(cell));
}
/**
* Should be called to tell the cell value cache that the specified cell has just been
* deleted.
* Failure to call this method after changing cell values will cause incorrect behaviour
* of the evaluate~ methods of this class
*/
public void notifyDeleteCell(HSSFCell cell) {
_bookEvaluator.notifyDeleteCell(new HSSFEvaluationCell(cell));
}
public void notifyDeleteCell(Cell cell) {
_bookEvaluator.notifyDeleteCell(new HSSFEvaluationCell((HSSFCell)cell));
}
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_BOOLEAN:
return CellValue.valueOf(cell.getBooleanCellValue());
case HSSFCell.CELL_TYPE_ERROR:
return CellValue.getError(cell.getErrorCellValue());
case HSSFCell.CELL_TYPE_FORMULA:
return evaluateFormulaCellValue(cell);
case HSSFCell.CELL_TYPE_NUMERIC:
return new CellValue(cell.getNumericCellValue());
case HSSFCell.CELL_TYPE_STRING:
return new CellValue(cell.getRichStringCellValue().getString());
case HSSFCell.CELL_TYPE_BLANK:
return null;
}
throw new IllegalStateException("Bad cell type (" + cell.getCellType() + ")");
}
/**
* 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
*/
public void notifySetFormula(Cell cell) {
_bookEvaluator.notifyUpdateCell(new HSSFEvaluationCell((HSSFCell)cell));
}
/**
* If cell contains a formula, the formula is evaluated and returned,
* else the CellValue simply copies the appropriate cell value from
* the cell and also its cell type. This method should be preferred over
* evaluateInCell() when the call should not modify the contents of the
* original cell.
*
* @param cell may be <code>null</code> signifying that the cell is not present (or blank)
* @return <code>null</code> if the supplied cell is <code>null</code> or blank
*/
public CellValue evaluate(Cell cell) {
if (cell == null) {
return null;
}
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_BOOLEAN:
return CellValue.valueOf(cell.getBooleanCellValue());
case HSSFCell.CELL_TYPE_ERROR:
return CellValue.getError(cell.getErrorCellValue());
case HSSFCell.CELL_TYPE_FORMULA:
return evaluateFormulaCellValue(cell);
case HSSFCell.CELL_TYPE_NUMERIC:
return new CellValue(cell.getNumericCellValue());
case HSSFCell.CELL_TYPE_STRING:
return new CellValue(cell.getRichStringCellValue().getString());
case HSSFCell.CELL_TYPE_BLANK:
return null;
}
throw new IllegalStateException("Bad cell type (" + cell.getCellType() + ")");
}
/**
* If cell contains formula, it evaluates the formula, and saves the result of the formula. The
* cell remains as a formula cell. If the cell does not contain formula, this method returns -1
* and leaves the cell unchanged.
*
* Note that the type of the <em>formula result</em> is returned, so you know what kind of
* cached formula result is also stored with the formula.
* <pre>
* int evaluatedCellType = evaluator.evaluateFormulaCell(cell);
* </pre>
* Be aware that your cell will hold both the formula, and the result. If you want the cell
* replaced with the result of the formula, use {@link #evaluateInCell(org.apache.poi.ss.usermodel.Cell)}
* @param cell The cell to evaluate
* @return -1 for non-formula cells, or the type of the <em>formula result</em>
*/
public int evaluateFormulaCell(Cell cell) {
if (cell == null || cell.getCellType() != HSSFCell.CELL_TYPE_FORMULA) {
return -1;
}
CellValue cv = evaluateFormulaCellValue(cell);
// cell remains a formula cell, but the cached value is changed
setCellValue(cell, cv);
return cv.getCellType();
}
/**
* If cell contains formula, it evaluates the formula, and saves the result of the formula. The
* cell remains as a formula cell. If the cell does not contain formula, this method returns -1
* and leaves the cell unchanged.
*
* Note that the type of the <em>formula result</em> is returned, so you know what kind of
* cached formula result is also stored with the formula.
* <pre>
* int evaluatedCellType = evaluator.evaluateFormulaCell(cell);
* </pre>
* Be aware that your cell will hold both the formula, and the result. If you want the cell
* replaced with the result of the formula, use {@link #evaluateInCell(org.apache.poi.ss.usermodel.Cell)}
* @param cell The cell to evaluate
* @return -1 for non-formula cells, or the type of the <em>formula result</em>
*/
public int evaluateFormulaCell(Cell cell) {
if (cell == null || cell.getCellType() != HSSFCell.CELL_TYPE_FORMULA) {
return -1;
}
CellValue cv = evaluateFormulaCellValue(cell);
// cell remains a formula cell, but the cached value is changed
setCellValue(cell, cv);
return cv.getCellType();
}
/**
* 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 HSSFCell is returned to
* allow chained calls like:
* <pre>
* int evaluatedCellType = evaluator.evaluateInCell(cell).getCellType();
* </pre>
* 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 {@link #evaluateFormulaCell(org.apache.poi.ss.usermodel.Cell)}}
* @param cell
*/
public HSSFCell evaluateInCell(Cell cell) {
if (cell == null) {
return null;
}
HSSFCell result = (HSSFCell) cell;
if (cell.getCellType() == HSSFCell.CELL_TYPE_FORMULA) {
CellValue cv = evaluateFormulaCellValue(cell);
setCellType(cell, cv); // cell will no longer be a formula cell
setCellValue(cell, cv);
}
return result;
}
private static void setCellType(Cell cell, CellValue cv) {
int cellType = cv.getCellType();
switch (cellType) {
case HSSFCell.CELL_TYPE_BOOLEAN:
case HSSFCell.CELL_TYPE_ERROR:
case HSSFCell.CELL_TYPE_NUMERIC:
case HSSFCell.CELL_TYPE_STRING:
cell.setCellType(cellType);
return;
case HSSFCell.CELL_TYPE_BLANK:
// never happens - blanks eventually get translated to zero
case HSSFCell.CELL_TYPE_FORMULA:
// this will never happen, we have already evaluated the formula
}
throw new IllegalStateException("Unexpected cell value type (" + cellType + ")");
}
/**
* 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 HSSFCell is returned to
* allow chained calls like:
* <pre>
* int evaluatedCellType = evaluator.evaluateInCell(cell).getCellType();
* </pre>
* 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 {@link #evaluateFormulaCell(org.apache.poi.ss.usermodel.Cell)}}
* @param cell
*/
public HSSFCell evaluateInCell(Cell cell) {
if (cell == null) {
return null;
}
HSSFCell result = (HSSFCell) cell;
if (cell.getCellType() == HSSFCell.CELL_TYPE_FORMULA) {
CellValue cv = evaluateFormulaCellValue(cell);
setCellType(cell, cv); // cell will no longer be a formula cell
setCellValue(cell, cv);
}
return result;
}
private static void setCellType(Cell cell, CellValue cv) {
int cellType = cv.getCellType();
switch (cellType) {
case HSSFCell.CELL_TYPE_BOOLEAN:
case HSSFCell.CELL_TYPE_ERROR:
case HSSFCell.CELL_TYPE_NUMERIC:
case HSSFCell.CELL_TYPE_STRING:
cell.setCellType(cellType);
return;
case HSSFCell.CELL_TYPE_BLANK:
// never happens - blanks eventually get translated to zero
case HSSFCell.CELL_TYPE_FORMULA:
// this will never happen, we have already evaluated the formula
}
throw new IllegalStateException("Unexpected cell value type (" + cellType + ")");
}
private static void setCellValue(Cell cell, CellValue cv) {
int cellType = cv.getCellType();
switch (cellType) {
case HSSFCell.CELL_TYPE_BOOLEAN:
cell.setCellValue(cv.getBooleanValue());
break;
case HSSFCell.CELL_TYPE_ERROR:
cell.setCellErrorValue(cv.getErrorValue());
break;
case HSSFCell.CELL_TYPE_NUMERIC:
cell.setCellValue(cv.getNumberValue());
break;
case HSSFCell.CELL_TYPE_STRING:
cell.setCellValue(new HSSFRichTextString(cv.getStringValue()));
break;
case HSSFCell.CELL_TYPE_BLANK:
// never happens - blanks eventually get translated to zero
case HSSFCell.CELL_TYPE_FORMULA:
// this will never happen, we have already evaluated the formula
default:
throw new IllegalStateException("Unexpected cell value type (" + cellType + ")");
}
}
private static void setCellValue(Cell cell, CellValue cv) {
int cellType = cv.getCellType();
switch (cellType) {
case HSSFCell.CELL_TYPE_BOOLEAN:
cell.setCellValue(cv.getBooleanValue());
break;
case HSSFCell.CELL_TYPE_ERROR:
cell.setCellErrorValue(cv.getErrorValue());
break;
case HSSFCell.CELL_TYPE_NUMERIC:
cell.setCellValue(cv.getNumberValue());
break;
case HSSFCell.CELL_TYPE_STRING:
cell.setCellValue(new HSSFRichTextString(cv.getStringValue()));
break;
case HSSFCell.CELL_TYPE_BLANK:
// never happens - blanks eventually get translated to zero
case HSSFCell.CELL_TYPE_FORMULA:
// this will never happen, we have already evaluated the formula
default:
throw new IllegalStateException("Unexpected cell value type (" + cellType + ")");
}
}
/**
* Loops over all cells in all sheets of the supplied
* workbook.
* For cells that contain formulas, their formulas are
* evaluated, and the results are saved. These cells
* remain as formula cells.
* For cells that do not contain formulas, no changes
* are made.
* This is a helpful wrapper around looping over all
* cells, and calling evaluateFormulaCell on each one.
*/
public static void evaluateAllFormulaCells(HSSFWorkbook wb) {
HSSFFormulaEvaluator evaluator = new HSSFFormulaEvaluator(wb);
for(int i=0; i<wb.getNumberOfSheets(); i++) {
HSSFSheet sheet = wb.getSheetAt(i);
/**
* Loops over all cells in all sheets of the supplied
* workbook.
* For cells that contain formulas, their formulas are
* evaluated, and the results are saved. These cells
* remain as formula cells.
* For cells that do not contain formulas, no changes
* are made.
* This is a helpful wrapper around looping over all
* cells, and calling evaluateFormulaCell on each one.
*/
public static void evaluateAllFormulaCells(HSSFWorkbook wb) {
HSSFFormulaEvaluator evaluator = new HSSFFormulaEvaluator(wb);
for(int i=0; i<wb.getNumberOfSheets(); i++) {
HSSFSheet sheet = wb.getSheetAt(i);
for (Iterator rit = sheet.rowIterator(); rit.hasNext();) {
HSSFRow r = (HSSFRow)rit.next();
for (Iterator rit = sheet.rowIterator(); rit.hasNext();) {
HSSFRow r = (HSSFRow)rit.next();
for (Iterator cit = r.cellIterator(); cit.hasNext();) {
HSSFCell c = (HSSFCell)cit.next();
if (c.getCellType() == HSSFCell.CELL_TYPE_FORMULA)
evaluator.evaluateFormulaCell(c);
}
}
}
}
for (Iterator cit = r.cellIterator(); cit.hasNext();) {
HSSFCell c = (HSSFCell)cit.next();
if (c.getCellType() == HSSFCell.CELL_TYPE_FORMULA)
evaluator.evaluateFormulaCell(c);
}
}
}
}
/**
* Returns a CellValue wrapper around the supplied ValueEval instance.
* @param eval
*/
private CellValue evaluateFormulaCellValue(Cell cell) {
ValueEval eval = _bookEvaluator.evaluate(new HSSFEvaluationCell((HSSFCell)cell));
if (eval instanceof NumberEval) {
NumberEval ne = (NumberEval) eval;
return new CellValue(ne.getNumberValue());
}
if (eval instanceof BoolEval) {
BoolEval be = (BoolEval) eval;
return CellValue.valueOf(be.getBooleanValue());
}
if (eval instanceof StringEval) {
StringEval ne = (StringEval) eval;
return new CellValue(ne.getStringValue());
}
if (eval instanceof ErrorEval) {
return CellValue.getError(((ErrorEval)eval).getErrorCode());
}
throw new RuntimeException("Unexpected eval class (" + eval.getClass().getName() + ")");
}
/**
* Returns a CellValue wrapper around the supplied ValueEval instance.
* @param eval
*/
private CellValue evaluateFormulaCellValue(Cell cell) {
ValueEval eval = _bookEvaluator.evaluate(new HSSFEvaluationCell((HSSFCell)cell));
if (eval instanceof NumberEval) {
NumberEval ne = (NumberEval) eval;
return new CellValue(ne.getNumberValue());
}
if (eval instanceof BoolEval) {
BoolEval be = (BoolEval) eval;
return CellValue.valueOf(be.getBooleanValue());
}
if (eval instanceof StringEval) {
StringEval ne = (StringEval) eval;
return new CellValue(ne.getStringValue());
}
if (eval instanceof ErrorEval) {
return CellValue.getError(((ErrorEval)eval).getErrorCode());
}
throw new RuntimeException("Unexpected eval class (" + eval.getClass().getName() + ")");
}
}

9
src/ooxml/interfaces-jdk15/org/apache/poi/ss/usermodel/Cell.java
View File

@ -183,6 +183,15 @@ public interface Cell {
RichTextString getRichStringCellValue();
/**
* Get the value of the cell as a string - for numeric cells we throw an exception
* <p>
* For blank cells we return an empty string.
* For formulaCells that are not string Formulas, we return empty String
* </p>
*/
String getStringCellValue();
/**
* set a boolean value for the cell
*

7
src/ooxml/interfaces-jdk15/org/apache/poi/ss/usermodel/CreationHelper.java
View File

@ -44,4 +44,11 @@ public interface CreationHelper {
* Creates a new Hyperlink, of the given type
*/
Hyperlink createHyperlink(int type);
/**
* Creates FormulaEvaluator - an object that evaluates formula cells.
*
* @return a FormulaEvaluator instance
*/
FormulaEvaluator createFormulaEvaluator();
}

12
src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFCreationHelper.java
View File

@ -31,7 +31,7 @@ public class XSSFCreationHelper implements CreationHelper {
* Creates a new XSSFRichTextString for you.
*/
public XSSFRichTextString createRichTextString(String text) {
XSSFRichTextString rt =new XSSFRichTextString(text);
XSSFRichTextString rt = new XSSFRichTextString(text);
rt.setStylesTableReference(workbook.getStylesSource());
return rt;
}
@ -43,4 +43,14 @@ public class XSSFCreationHelper implements CreationHelper {
public XSSFHyperlink createHyperlink(int type) {
return new XSSFHyperlink(type);
}
/**
* Creates a XSSFFormulaEvaluator, the object that evaluates formula cells.
*
* @return a XSSFFormulaEvaluator instance
*/
public XSSFFormulaEvaluator createFormulaEvaluator(){
return new XSSFFormulaEvaluator(workbook);
}
}