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Fix bug #48528 - support negative arguments to the DATE() function 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1331796 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2012-04-28 17:29:06 +00:00
parent 64ad74884e
commit c746a5f3c7
3 changed files with 73 additions and 5 deletions
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1
src/documentation/content/xdocs/status.xml
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@ -34,6 +34,7 @@
<changes>
<release version="3.9-beta1" date="2012-??-??">
<action dev="poi-developers" type="fix">48528 - support negative arguments to the DATE() function</action>
<action dev="poi-developers" type="fix">53092 - allow specifying of a TimeZone to DateUtil.getJavaDate(), for when it is known that a file comes from a different (known) timezone to the current machine</action>
<action dev="poi-developers" type="fix">53043 - don't duplicate hyperlink relationships when saving XSSF file</action>
<action dev="poi-developers" type="fix">53101 - fixed evaluation of SUM over cell range &gt; 255</action>

33
src/java/org/apache/poi/ss/formula/functions/DateFunc.java
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@ -54,16 +54,29 @@ public final class DateFunc extends Fixed3ArgFunction {
return new NumberEval(result);
}
/**
* Note - works with Java Calendar months, not Excel months
*/
private static double evaluate(int year, int month, int pDay) throws EvaluationException {
if (year < 0 || month < 0 || pDay < 0) {
// We don't support negative years yet
if (year < 0) {
throw new EvaluationException(ErrorEval.VALUE_INVALID);
}
// Negative months are fairly easy
while (month < 0) {
year--;
month += 12;
}
// Negative days are handled by the Java Calendar
// Excel has bugs around leap years in 1900, handle them
// Special case for the non-existant 1900 leap year
if (year == 1900 && month == Calendar.FEBRUARY && pDay == 29) {
return 60.0;
}
// If they give a date in 1900 in Jan/Feb, with the days
// putting it past the leap year, adjust
int day = pDay;
if (year == 1900) {
if ((month == Calendar.JANUARY && day >= 60) ||
@ -72,12 +85,24 @@ public final class DateFunc extends Fixed3ArgFunction {
}
}
// Turn this into a Java date
Calendar c = new GregorianCalendar();
c.set(year, month, day, 0, 0, 0);
c.set(Calendar.MILLISECOND, 0);
return DateUtil.getExcelDate(c.getTime(), false); // TODO - fix 1900/1904 problem
// Handle negative days of the week, that pull us across
// the 29th of Feb 1900
if (pDay < 0 && c.get(Calendar.YEAR) == 1900 &&
month > Calendar.FEBRUARY &&
c.get(Calendar.MONTH) < Calendar.MARCH) {
c.add(Calendar.DATE, 1);
}
// TODO Identify if we're doing 1900 or 1904 date windowing
boolean use1904windowing = false;
// Have this Java date turned back into an Excel one
return DateUtil.getExcelDate(c.getTime(), use1904windowing);
}
private static int getYear(double d) {

42
src/testcases/org/apache/poi/hssf/usermodel/TestFormulaEvaluatorBugs.java
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@ -293,6 +293,48 @@ public final class TestFormulaEvaluatorBugs extends TestCase {
}
}
public void testDateWithNegativeParts_bug48528() {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("Sheet1");
HSSFRow row = sheet.createRow(1);
HSSFCell cell = row.createCell(0);
HSSFFormulaEvaluator fe = new HSSFFormulaEvaluator(wb);
// 5th Feb 2012 = 40944
// 1st Feb 2012 = 40940
// 5th Jan 2012 = 40913
// 5th Dec 2011 = 40882
// 5th Feb 2011 = 40579
cell.setCellFormula("DATE(2012,2,1)");
fe.notifyUpdateCell(cell);
assertEquals(40940.0, fe.evaluate(cell).getNumberValue());
cell.setCellFormula("DATE(2012,2,1+4)");
fe.notifyUpdateCell(cell);
assertEquals(40944.0, fe.evaluate(cell).getNumberValue());
cell.setCellFormula("DATE(2012,2-1,1+4)");
fe.notifyUpdateCell(cell);
assertEquals(40913.0, fe.evaluate(cell).getNumberValue());
cell.setCellFormula("DATE(2012,2,1-27)");
fe.notifyUpdateCell(cell);
assertEquals(40913.0, fe.evaluate(cell).getNumberValue());
cell.setCellFormula("DATE(2012,2-2,1+4)");
fe.notifyUpdateCell(cell);
assertEquals(40882.0, fe.evaluate(cell).getNumberValue());
cell.setCellFormula("DATE(2012,2,1-58)");
fe.notifyUpdateCell(cell);
assertEquals(40882.0, fe.evaluate(cell).getNumberValue());
cell.setCellFormula("DATE(2012,2-12,1+4)");
fe.notifyUpdateCell(cell);
assertEquals(40579.0, fe.evaluate(cell).getNumberValue());
}
private static final class EvalListener extends EvaluationListener {
private int _countCacheHits;
private int _countCacheMisses;