diff --git a/src/documentation/content/xdocs/hssf/eval.xml b/src/documentation/content/xdocs/hssf/eval.xml
index d697eb082..197391b38 100644
--- a/src/documentation/content/xdocs/hssf/eval.xml
+++ b/src/documentation/content/xdocs/hssf/eval.xml
@@ -32,14 +32,17 @@
formulas in Excels sheets read-in, or created in POI. This document explains
how to use the API to evaluate your formulas.
- This code currently lives the scratchpad area of the POI CVS repository.
+ This code currently lives the scratchpad area of the POI SVN repository.
Ensure that you have the scratchpad jar or the scratchpad build area in your
- classpath before experimenting with this code.
+ classpath before experimenting with this code. You are advised
+ to make use of a recent SVN checkout, as new functions are
+ being supported fairly frequently.
Status
+
The code currently provides implementations for all the arithmatic operators.
- It also provides implementations for approx. 20 built in
+ 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 Formula
evaluation development guide for details.
@@ -53,6 +56,7 @@
There are two ways in which you can use the HSSFFormulaEvalutator API.
Using HSSFFormulaEvaluator.evaluate(HSSFCell cell)
+
- Using HSSFFormulaEvaluator.evaluateInCell(HSSFCell cell)
-
+ Using HSSFFormulaEvaluator.evaluateInCell(HSSFCell cell)
+
+
evaluateInCell(HSSFCell cell) will check to
+ see if the supplied cell is a formula cell. If it isn't,
+ then no changes will be made to it. If it is, then the
+ formula is evaluated, and the new value saved into the cell.
+
+
+ Re-calculating all formulas in a Workbook
+
+
+ for(Iterator rit = s.rowIterator(); rit.hasNext();) {
+ HSSFRow r = (HSSFRow)rit.next();
+ evaluator.setCurrentRow(r);
+
+ for(Iterator cit = r.cellIterator(); cit.hasNext();) {
+ HSSFCell c = (HSSFCell)cit.next();
+ if(c.getCellType() == HSSFCell.CELL_TYPE_FORMULA) {
+ evaluator.evaluateInCell(c);
+ }
+ }
+ }
+}
+wb.write(new FileOutputStream("/somepath/changed.xls"));
+
+ Performance Notes
+
Generally you should have to create only one HSSFFormulaEvaluator
instance per sheet, but there really is no overhead in creating